JP2000170115A - Functionality double layer spraying type surface treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of simply and inexpensively constructing a pavement body having various functions and excellent in durability and a functionality pavement body, excellent in durability and stability, constructed by the method. SOLUTION: In a double layer spraying type surface treatment method wherein binders 2a, 2b are sprayed and working spraying aggregates 3a, 3b thereon is repeated at least two times to construct a plurality of surface treatment layers on a road surface, one kind or two kinds and above of the functionality aggregates selected out of a colored aggregate, an aggregate having light reflection, luminosity, fluorescence and/or light accumulated property, an aggregate having freezing prevention effect and an aggregate having elasticity are sprayed as the aggregate 3b of the uppermost layer. A pavement body constructed by the surface treatment method is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a functional multi-layer spray type surface treatment method, and more particularly, to a functional multi-layer spray type surface capable of easily constructing a pavement having various functions. The present invention relates to a processing method and a functional pavement obtained by the method.

[0002]

2. Description of the Related Art With the diversification of lifestyles and the progress of motorization, various functions are required on the road surface on which people and vehicles pass on a daily basis. For example, if it becomes possible to give the road surface an arbitrary color, the road surface will harmonize with any surrounding environment without discomfort, and enhance or relax the feelings of pedestrians and vehicle drivers, You can open your dreams of life with rich colors, and if the road surface such as curves and intersections shines glittering at night, it will alert pedestrians and vehicle drivers etc. It is also possible to prevent. In addition, if there is a road surface that does not freeze even in winter, it is safe, and in addition, a road surface that is difficult to slip, a road surface that is elastic and absorbs shocks, etc. I have.

However, conventional pavement roads are constructed by mixing aggregates such as crushed stones and binders such as asphalt and spreading them to a certain thickness.
It has been extremely difficult, if not impossible, to provide various functions. That is, for example, in the case of color pavement, even if a desired color is used for the aggregate, since the binder such as asphalt mixed with the colored aggregate is not transparent, a vivid color It is difficult to get.
Also, even if an attempt is made to impart light reflectivity to the road surface by using light-reflective aggregates or the like, a large amount must be mixed in a mixture with a binder such as asphalt, which is extremely expensive, and There is a problem that the binder adheres to the surface of the aggregate and the original light reflectivity is impaired. There is no conceivable solution to reduce the amount of asphalt and other binders used to make the pavement itself thinner, but if the amount of binders is reduced indiscriminately, the bonding power that holds the aggregate is inferior As a result, the aggregate is scattered, which not only causes an unexpected accident but also has a disadvantage that the pavement itself is damaged.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks of the prior art. It is an object of the present invention to provide a construction method which can be constructed at a high speed, and a functional pavement constructed by such a construction method and having excellent durability and stability.

[0005]

Means for Solving the Problems The inventors of the present invention have studied various methods for constructing a pavement body, and found that a scattered surface treatment method, in particular, a method of constructing a plurality of layers composed of a binder and an aggregate on a road surface. Focusing on the multi-layer type spray-type surface treatment method, if various functional aggregates are used as the aggregate to be sprayed on the uppermost layer in the multi-layer type spray-type surface treatment method, it will be strong and durable. The inventors have found that a functional pavement excellent in stability can be easily and inexpensively constructed, and completed the present invention.

That is, the present invention relates to a multi-layer spraying type surface treatment method for constructing a plurality of surface treatment layers on a road surface by repeating an operation of spraying a binder and spraying an aggregate thereon at least twice or more. , Colored aggregate as the top layer aggregate,
One or more functional bones selected from light-reflective, brilliant, fluorescent, and / or luminous aggregates, aggregates having an antifreezing effect, and elastic aggregates In addition to providing a functional multi-layer spray type surface treatment method for spraying materials, the above-mentioned problem is solved by providing a pavement body constructed by such a functional multi-layer spray type surface treatment method. is there.

[0007] The spraying surface treatment method is one of the conventionally proposed methods for repairing aged and deteriorated road pavement together with the mixed surface treatment method and the overlay method. In the surface treatment method, for example, as shown in FIG. 1, a binder 2 such as asphalt is sprayed on a road surface 1 on which aging or deterioration has occurred to cause unevenness or cracks, and then an aggregate 3 is further placed thereon. Spraying work,
This method is a method in which the aggregate 3 is bonded to the road surface 1 by the bonding material 2 by repeating once or a plurality of times, and one or more layers composed of the bonding material 2 and the aggregate 3 are constructed on the road surface 1.

This spray-type surface treatment method is very effective as a method for repairing aged and deteriorated pavement since the surface of the pavement can be repaired relatively easily. However, the repair method using an asphalt mixture is not effective. No, just binder 2
Since the aggregates 3 are merely connected to the road surface 1 by the tires, the aggregates 3 spread on the binders 2 by the scratching force or the impact force received from the tires or the like of the passing vehicle may have a reference numeral 4. In some cases, a phenomenon of scattering was observed as shown by. If the aggregate 3 is scattered, the binder 2 appears directly on the surface of the road surface 1, so that the road surface flashes and becomes extremely slippery, causing slippage of passing vehicles and the like, which may cause traffic accidents. There was a danger.

In view of the above, the spraying type surface treatment method has heretofore been considered only as a temporary repair method for an aged or deteriorated road surface. To build or even
Such as building functional pavements with various functions,
Not at all. The present inventors focused on the simplicity of the scattered surface treatment method, in particular, the simplicity of the multi-layer scattered surface treatment method of constructing a plurality of surface treatment layers with a binder and an aggregate, by repeating experiments, Surprisingly, this multi-layer spraying type surface treatment method can firmly anchor various functional aggregates on the road surface, and with simple construction, a surface treatment layer with various functions, such as It has been found that a functional pavement having a suitable surface treatment layer can be constructed.

According to the functional multi-layer spraying type surface treatment method of the present invention, it is possible to construct various functional surface treatment layers as part of pavement repair without replacing existing pavements. is there. The constructed functional surface treatment layer not only exhibits the expected expected functions, but also strongly seals the existing pavement, such as cracks and ruts, etc., and prolongs the life of the pavement. It has excellent effects. In addition, since the binder and the aggregate are substantially only sprayed a plurality of times in a single layer, the amount of material used can be reduced, which is very economical.

The functional aggregate used in the present invention includes colored aggregate, light-reflective, brilliant, fluorescent, and / or luminous aggregate, aggregate having an antifreezing effect, and One or more functional aggregates selected from elastic aggregates. A plurality of aggregates having different functions may be used in combination, or a plurality of aggregates having the same function but different in particle size may be used in combination. For example, using colored aggregates and light-reflective aggregates together, and in the daytime, the colored aggregates maintain lightness,
At night, it is possible to lighten the road surface with light-reflective aggregates, and to alert pedestrians and vehicle drivers both day and night. It is also possible to use a colored aggregate and an aggregate having an anti-freezing effect in combination to provide both functions, and furthermore, to use aggregates having different particle sizes also having an anti-freezing function. Various changes are possible, such as making small-diameter aggregate grains enter the gap between large-diameter aggregate grains or the gap between large-diameter aggregate grains and the road surface, thereby making the interlocking of the aggregates more reliable. . In particular, elastic aggregates require a certain particle size in order to exhibit their functions due to their properties. However, light-reflective, brilliant, fluorescent or luminous aggregates may be of relatively small diameter. The surface treatment layer or pavement with multiple functions in one operation by using two or more of these aggregates in many You can build your body at once. Furthermore, a functional aggregate as described above and a normal aggregate may be used in combination.For example, a functional aggregate having excellent function but lacking strength can also be used by being used together with the normal aggregate. It is. The ordinary aggregate referred to in the present specification is an aggregate other than the above-mentioned functional aggregate.

Further, in the functional multi-layer type spraying type surface treatment method of the present invention, when the minimum particle size of the aggregate is less than 10 mm in the nominal size of the sieve opening as the aggregate used for the lowermost layer, When the difference between the minimum particle size and the maximum particle size is 2 mm or more and less than 5 mm in the nominal size of the sieve aperture, and when the minimum particle size is 10 mm or more in the nominal size of the sieve aperture, The difference between the minimum particle size and the maximum particle size is more than 3 mm in the nominal size of the sieve opening, and if aggregates of 6 mm or less are used, it is strong, rich in wear resistance and durability and excellent in stability. A multi-layer spray-type surface treatment layer can be constructed.

In the functional multi-layer spraying type surface treatment method of the present invention, the binder or at least one of the layers has an absolute viscosity at 60 ° C. of a binder or an evaporation residue in the binder. About 15,000 poise
se) If the above is used, even when the binder is sprayed on a road surface with severe unevenness or deformation, the sprayed binder flows along the slope of the road surface and the thickness of the binder on the road surface is dark. The aggregate can be bonded to the road surface with a uniform and stable bonding force without becoming uneven. Here, the absolute viscosity is described in "Pavement Test Manual", Japan Road Association,
It is a value measured based on the viscosity test method described on pages 398 to 402, issued on June 10, 1995.

In the present invention, as the binder, the binder or the evaporation residue in the binder has the following characteristics a) to d), namely: a) a penetration of 50 to 150 (1/10 mm); b) softening point of 50 to 120 ° C; c) toughness at 25 ° C of 70 to 320 kgf · c
m, d) Tenacity at 25 ° C. is 30 to 300 kgf ·
When using a binder having the following properties, the bonding strength between the aggregate and the road surface or between the aggregate and the surface treatment layer is further increased, and a more durable multi-layer type spray-type surface treatment layer is constructed. It is possible to do. As the binder, it is desirable to use asphalt emulsion that can be applied at room temperature, because heating is not required, there is little danger, and no carbon dioxide gas is generated. When (1) is used, the evaporation residue in the asphalt emulsion has the above-mentioned characteristics (a) to (d). Unless otherwise specified, the asphalt emulsion referred to in the present specification also includes a modified asphalt emulsion modified by adding a rubber, a thermoplastic polymer, or the like.

In the present invention, when an asphalt emulsion is used as a binder, two asphalt emulsions are used.
Desirably, the viscosity at 0 ° C. is about 40 centipoise or greater. The viscosity at 20 ° C is about 40 as a binder
If an asphalt emulsion of centipoise or more is used, even when a binder is sprayed on a road surface with severe irregularities or deformation, the sprayed binder will flow along the slope of the road immediately after spraying. Thus, the thickness of the binder on the road surface does not become uneven, and a surface treatment layer having a uniform and stable binding force can be constructed. Here, the viscosity is determined by the viscosity test described in “Pavement Test Method Handbook Separate Volume (Provisional Test Method)”, edited by the Japan Road Association, published by Maruzen Co., Ltd., Oct. 20, 1996, pp. 69-74. It is a value measured according to the method.

When an asphalt emulsion is used as the binder, it is preferable to spray a decomposition aid which promotes the decomposition of the asphalt emulsion as the binder at the same time as or before or after the asphalt emulsion. According to such a surface treatment method of the present invention, in addition to using asphalt emulsion which does not require special heating at the time of construction as a binder, a decomposition aid which promotes decomposition of asphalt emulsion is used. Therefore, there is an advantage that the decomposition of the asphalt emulsion is promoted, and a spray-type surface treatment layer which is strong, durable and excellent in stability can be constructed at room temperature and in a short curing time.

As the decomposition aid used in the present invention, any one can be used as long as it can promote the decomposition of the asphalt emulsion as a binder, and the cationic asphalt emulsion may be used as the asphalt emulsion. When using an anionic emulsifier, an alkaline inorganic salt, an anionic polymer flocculant, an anionic asphalt emulsion, and one or more decomposition aids selected from the group consisting of anionic latex However, if possible, it is desirable to use one or more of anionic emulsifiers such as an alkylbenzene sulfonate, a metal salt of alkylmethyltauric acid, and a metal salt of di-octyl sulfo-succinic acid. Among them, a metal salt of an alkylbenzenesulfonic acid is most preferable.

When an anionic asphalt emulsion is used as the asphalt emulsion, a divalent inorganic salt, an inorganic acid,
One or more decomposition aids selected from the group consisting of organic acids and amine-based cationic surfactants, and among them, one or more decomposition aids selected from amine-based cationic surfactants It is desirable to use. When a nonionic asphalt emulsion is used as the asphalt emulsion, it is desirable to use one or more decomposition aids selected from polymer flocculants.

In the present invention, when an asphalt emulsion is used as a binder and a decomposition aid is used, the asphalt emulsion and the decomposition aid may be used on the road surface or at the same time or before or after the surface treatment. Sprinkled on layers. To spray the asphalt emulsion and the decomposition aid on the road surface or on the surface treatment layer before and after is to spray either the asphalt emulsion or the decomposition aid on the road or on the construction site on the surface treatment layer first. , A decomposition aid or an asphalt emulsion is sprayed over the previously sprayed one. As a result of the application before and after the asphalt emulsion, the asphalt emulsion and the decomposition aid come into contact with each other on the road surface or on the surface treatment layer, and come into contact with each other. Spraying the asphalt emulsion and the decomposition aid as a room temperature binder on the road surface or on the surface treatment layer at the same time means that the asphalt emulsion and the decomposition aid to be sprayed at the same construction site are both used. Spraying with at least partly overlapping spraying time,
As a result of being sprayed at the same time, the asphalt emulsion and the decomposition aid reach the same place on the road surface or the surface treatment layer at the same time and meet there, or meet in the air, contact, and mix.

In the functional multi-layer spraying type surface treatment method of the present invention, the asphalt emulsion as a binder and the decomposition aid are sprayed in succession or at the same time.
The sprayed asphalt emulsion and the decomposition aid meet, contact, mix on the road surface or on the surface treatment layer or in the air,
Decomposition of the asphalt emulsion as a binder is promoted by the action of the decomposition aid, and the film formation time and hardening time of the asphalt emulsion are reduced. In the functional multi-layer spray type surface treatment method of the present invention, even if the asphalt emulsion as a binder and the decomposition aid are sprayed in succession, or
It may be sprayed at the same time, but from the viewpoint of shortening the hardening time of the asphalt emulsion and constructing a surface treatment layer with excellent strength and durability, the asphalt emulsion and the decomposition aid are sprayed at the same time. Most preferably, they are sprayed at the same time and the two collide in the air.

When the asphalt emulsion and the decomposition aid are sprayed at the same time and the two are collided in the air, the asphalt emulsion and the decomposition aid are sprayed using one or two or more spray nozzles, respectively. It is preferable that the asphalt emulsion sprayed from the spray nozzle and the decomposition aid sprayed from one spray nozzle collide in the air. Further, it is desirable that the spread width of the decomposition aid sprayed from each spray nozzle at the collision position is substantially equal to the spread width of the asphalt emulsion sprayed from the corresponding spray nozzle as the collision partner at the collision position. Further, the injection density of the decomposition aid ejected from the individual spray nozzle at the collision position with the asphalt emulsion, the entire spread width at the collision position,
It should be almost uniform. By doing so, the asphalt emulsion as a binder and the decomposition aid can be uniformly collided, contacted, and mixed at a controlled ratio, and the decomposition and hardening time of the asphalt emulsion can be further reduced. In addition, the durability and strength of the obtained surface treatment layer are also positively affected.

Furthermore, in the present invention, when the minimum particle size of the aggregate used as the lowermost layer is less than 10 mm in the nominal size of the opening of the sieve, the difference between the minimum particle size and the maximum particle size is determined. Nominal size of sieve opening is 2mm or more, 5mm
If the aggregate is less than 10 mm and the minimum particle size is 10 mm or more in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is 3 mm or more in the nominal size of the sieve opening and 6 mm If the following aggregate is used, it is possible to construct a multi-layer type functional spray type surface treatment layer which is strong, has excellent wear resistance and durability, and is excellent in stability.

In the present invention, when the fiber material is scattered or spread at the same time as the binder or before or after the binder, the fiber material and the binder are mixed, and the aggregate is more strongly reinforced. It is possible to construct a functional surface treatment layer that is not only bonded to each other and to an aggregate and a road surface, but also has excellent durability and furthermore excellent waterproofness.

In the functional multi-layer spraying type surface treatment method of the present invention, it is desirable that the time from spraying of the binder to spraying of the aggregate is a relatively short fixed time interval. The temperature of the binder decreases or the decomposition progresses immediately after the binder is sprayed on the road surface. The state of the binder at the time of spraying also changes irregularly, and as a result, a uniform and highly durable surface treatment layer cannot be obtained. In order to maintain the time from the application of the binder to the application of the aggregate at a relatively short fixed time interval, it is necessary to use a work vehicle equipped with at least an apparatus for applying the binder and the apparatus for applying the aggregate. Is desirable. As such a working vehicle, for example, Japanese Patent Application No. 11-1 by the same applicant is disclosed.
No. 45614, Japanese Patent Application No. 11-145612, Japanese Patent Application No. 10-172107, Japanese Patent Application No.
No. 172119 and Japanese Patent Application No. 10-17798
A work vehicle as disclosed in the specification of Japanese Patent Application Laid-Open Publication No. 6-64. In addition, by equipping such a working vehicle with a device for dispersing the decomposition aid and / or a device for spreading or spreading the fibrous material, the decomposition aid and / or simultaneously with or before and after the binder. Alternatively, it is easily possible to spray or spread the fibrous material and then spray the aggregate at relatively short fixed time intervals.

The functional multi-layer spraying type surface treatment method of the present invention is not limited to a general road, but also includes a motorway, a campus road, a park road, a walking path, a bicycle path, a sports ground, a parking lot, an airfield, and a harbor facility. It is also applied to pavement such as public squares and public squares, wide sidewalks, etc., and its use is not only to provide functionality and repair, but also to construct a functional surface layer in new construction work Can also be used.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

First, the materials used will be described. <Binder> Examples of the binder used in the functional multi-layer spray type surface treatment method of the present invention include asphalt, asphalt emulsion, resin, paint, pavement tar, cutback asphalt, and the like.

Examples of the asphalt used in the present invention include natural asphalt such as lake asphalt, straight asphalt, blown asphalt, semi-blown asphalt, and petroleum asphalt such as solvent deasphalted asphalt (for example, propane deasphalted asphalt). These asphalts may be used alone or as a mixture of two or more.

It is desirable that these asphalts are modified with a rubber or a thermoplastic polymer to increase the bonding strength or adhesion. As the rubber and thermoplastic polymer used for the modification, natural rubber, rattle, cyclized rubber, styrene / butadiene rubber, styrene / isoprene rubber, isoprene rubber, polyisoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber, Halogenated rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene propylene rubber, ethylene propylene rubber, EPT rubber, olefin rubber, styrene / butadiene block copolymer rubber, styrene / butadiene / styrene copolymer rubber, styrene / isoprene block copolymer rubber, etc. , And ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyethylene, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer,
Thermoplastic polymers such as vinyl acetate / acrylate copolymers are exemplified. These rubbers or thermoplastic polymers can be used alone or in combination of two or more.

The mixing ratio of the asphalt to the rubber and the thermoplastic polymer in the modified asphalt is such that the rubber and the thermoplastic polymer are usually 2 to 20 parts by weight based on 100 parts by weight of the asphalt. A range is preferred. If the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the performance as a modified asphalt cannot be exhibited, and the adhesive strength between the aggregates and between the aggregates and the road surface and the grasping power are generally asphalt. On the other hand, when the amount of the rubber and the thermoplastic polymer exceeds 20 parts by weight, the cohesive force is too strong, and the aggregate returns and the aggregate is scattered. easy. The asphalt in the asphalt or the modified asphalt used as the binder of the present invention has a penetration (25 ° C.) of 5 in consideration of characteristics after use.
It is preferable to use one having a size of about 0 to 150 (1/10 mm).

The asphalt or the modified asphalt used as the binder of the present invention is further added with a thermoplastic solid resin or solid rubber, a liquid resin, a softener, a plasticizer, etc. as a tackifier. be able to. Examples of the tackifier to be added include, for example, rosin and derivatives thereof, terpene resins, petroleum resins and derivatives thereof, alkyd resins, alkylphenol resins, terpene phenol resins, cumarone indene resins, synthetic terpene resins, alkylene resins, polyisobutylene, Examples include polybutadiene, polybutene, copolymers of isobutylene and butadiene, mineral oil, process oil, pine oil, anthracene oil, pine oil, animal and vegetable oils, polymerized oils, plasticizers, and the like. Further, an antioxidant, an antioxidant, sulfur and the like can be added.

The asphalt emulsion used as the binder of the present invention includes natural asphalt such as lake asphalt, straight asphalt, blown asphalt,
One type of petroleum asphalt such as semi-blown asphalt and solvent deasphalted asphalt (for example, propane deasphalted asphalt), heavy oil, tar, pitch, etc. (E.g., bentonite), and further add an alkali, an acid, a salt, a dispersant, a protective colloid, and the like, if necessary, and emulsify in water with a suitable emulsifier such as a colloid mill, a homogenizer, and a homomixer. It was made. As the emulsifier, any of a cationic type, an anionic type and an amphoteric type can be used.

The cationic emulsifiers usable in the present invention include aliphatic or alicyclic monoamines, diamines, triamines, amidoamines having a long-chain alkyl group.
Polyaminoethylimidazoline, long-chain hydroxyalkyldiamine, rosinamine, ethylene oxide adducts of these amines, amine oxides, or water-soluble compounds obtained by reacting these amine surfactants with acids such as hydrochloric acid, sulfamic acid and acetic acid. Examples thereof include water-dispersible salts, and quaternary ammonium salts of these amine surfactants. In addition, a nonionic surfactant such as a polyoxyethylene alkyl ether, a polyoxyethylene alkyl allyl ether, or an oxyethylene / oxypropylene block copolymer can be used in combination with these surfactants.

The anionic emulsifiers usable in the present invention include higher alcohol sulfates, alkyl allyl sulfonates, alkyl benzene sulfonates, α-olefin sulfonates, higher alcohol ethoxylates, higher alcohol ethoxylate sulfates, and the like. Soap, naphthalene sulfonate and modified formalin,
Examples thereof include alkali lignin salts, lignin sulfonates, alkali salts of casein, and polyacrylates.

Examples of the amphoteric emulsifier which can be used in the present invention include alkylphenols, mono- and polyhydric alcoholic acids, adducts of alkylene oxides such as aliphatics, aliphatic amines, aliphatic amides and ethanolamines. Is mentioned.

The dispersant and protective colloid used in the asphalt emulsion include sodium naphthalenesulfonate, casein, alginic acid, gelatin, carboxymethylcellulose, ethylcellulose, hydroxyethylcellulose, polyvinyl alcohol, sodium polyacrylate, ligninsulfonate, Nitrohumates and the like.

The asphalt emulsion used as the binder of the present invention is obtained by modifying the above-described emulsified and dispersed bituminous material by adding one or more selected from rubber and a thermoplastic polymer. It is desirable to use it as an asphalt emulsion.

The rubber and thermoplastic polymer used for the modification include natural rubber, rattle, cyclized rubber, styrene / butadiene rubber, styrene / isoprene rubber,
Isoprene rubber, polyisoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber, halogenated butyl rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene propylene rubber, EPT rubber, alffine rubber, styrene / butadiene block copolymer rubber, styrene / butadiene / Styrene copolymer rubber, styrene
Rubber such as isoprene block copolymer rubber, and ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyethylene, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, vinyl acetate / acrylate A thermoplastic polymer such as a copolymer is exemplified. These rubbers or thermoplastic polymers can be used alone or in combination of two or more. These rubbers and thermoplastic polymers are, for example, powdery, latex, emulsion, and water-based, and latex, emulsion, and water-based are mainly obtained by a post-mix type method. It is used exclusively for modified asphalt emulsions, but may be used for modified asphalt emulsions by a premix type method.

The asphalt emulsion or the modified asphalt emulsion used as the binder of the present invention further contains a thermoplastic solid resin or solid rubber, a liquid resin, a softener, a plasticizer, etc. as a tackifier. Can be added. As the tackifier to be added, for example, rosin and its derivatives, terpene resin, petroleum resin and its derivatives,
Alkyd resin, alkylphenol resin, terpene phenol resin, cumarone indene resin, synthetic terpene resin, alkylene resin, polyisobutylene, polybutadiene, polybutene, copolymer of isobutylene and butadiene, mineral oil, process oil, pine oil, anthracene oil, pine oil , Animal and vegetable oils, polymerized oils, plasticizers and the like. Further, an antioxidant, an antioxidant, sulfur and the like can be added. Further, for the purpose of adjusting the viscosity of the modified asphalt emulsion, a water-soluble polymer protective colloid such as MC, CMC, HEC, PVA, or gelatin can be added.

The mixing ratio of the asphalt, the rubber and the thermoplastic polymer in the modified asphalt emulsion is preferably 2 to 20 parts by weight of the rubber and the thermoplastic polymer with respect to 100 parts by weight of the asphalt. Ranges from 3 to 7 parts by weight. When the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the effect of adding the rubber and the thermoplastic polymer to the adhesive force and the grasping power to the aggregate after the modified asphalt emulsion is decomposed and cured is reduced. In contrast, when the amount of the rubber and the thermoplastic polymer exceeds 20 parts by weight, the cohesive force is too strong, and the aggregate is separated from the aggregate, causing the aggregate to scatter. easy. The asphalt in the asphalt emulsion and the modified asphalt emulsion used as the binder in the present invention has a penetration (25 ° C.) of 50 to 15 in consideration of the properties after decomposition and hardening.
It is preferable to use one having a diameter of about 0 (1/10 mm).

The evaporation residue (solid matter) of the asphalt emulsion and the modified asphalt emulsion used as a binder in the present invention is usually preferably about 30 to 70% by weight, and particularly preferably 50 to 68% by weight. More preferred. If the evaporation residue is less than 30% by weight, it cannot be said that it cannot be used, but it is difficult to obtain the necessary degree of viscoelasticity as a binder. Although it does not mean that it cannot be used, it tends to be difficult to ensure good workability.

In addition, these asphalt emulsions or modified asphalt emulsions may contain an ultraviolet absorber, various additives, and the like for the purpose of improving heat resistance, preventing deterioration due to ultraviolet rays, improving workability, and improving adhesion. A viscosity modifier and the like may be added. Decomposition of the asphalt emulsion may be left to spontaneous decomposition, but it is preferable to forcibly decompose it using a decomposition aid.

The resin or paint used as the binder in the present invention includes, for example, epoxy resin, polyurethane resin,
Reactive binders such as bitumen-modified epoxy resins, bitumen-modified polyurethane resins, polyester resins, and methacrylate resins can be used. In addition, paints using these resins, paints using resins such as styrene-butadiene copolymer resins, alkyd resins (including those modified with melamine resins and phenol resins), and furthermore, synthetic rubbers and synthetic resins A paint or the like containing as a main component can also be used.

The binder used in the functional multi-layer spraying type surface treatment method of the present invention is characterized in that the binder or the evaporation residue in the binder has the following characteristics a) to d), namely: a ) Penetration of 50 to 150 (1/10 mm), b) Softening point of 50 to 120 ° C, c) Toughness at 25 ° C of 70 to 320 kgf · c
m, d) Tenacity at 25 ° C. is 30 to 300 kgf ·
cm, and preferably a ′) to
The characteristics shown in d '), i.e., a') penetration is 70 to 125 (1/10 mm), b ') softening point is 55 to 100 ° C, c') toughness at 25 ° C is 90 to 250 kgf ·
cm, d ′) Tenacity at 25 ° C. is 50 to 220 kgf.
· Cm, more preferably a ″) below
To d ''), i.e., a '') penetration of 90 to 120 (1/10 mm), b '') softening point of 60 to 80 ° C., c '') toughness of 100 at 25 ° C. ~ 200kg
f · cm, d '') Tenacity at 25 ° C is 70 to 180 kg
f · cm. When an asphalt emulsion is used as the binder, it is desirable that the evaporation residue in the asphalt emulsion has the above characteristics.

If the penetration of the binder or the evaporation residue in the binder is less than 50 (1/10 mm), the binder (or asphalt after decomposition of the asphalt emulsion when an asphalt emulsion is used as the binder). Becomes too hard, which is not preferable. Conversely, the penetration is 150 (1/1).
If the thickness exceeds 0 mm, the binder (when asphalt emulsion is used as the binder, asphalt after the asphalt emulsion is decomposed) becomes too soft, which is not preferable.

When the softening point of the binder or the evaporation residue in the binder is less than 50 ° C., the binder (asphalt after the asphalt emulsion is decomposed when the asphalt emulsion is used as the binder) is not used in summer or the like. On the other hand, when the softening point is higher than 120 ° C., the binder (when asphalt emulsion is used as the binder, the asphalt after decomposition of the asphalt emulsion is not preferable). ) Lacks flexibility and is not preferred.

If the toughness of the binder or the evaporation residue in the binder at 25 ° C. is less than 70 kgf · cm, the binder (when asphalt emulsion is used as the binder, asphalt after decomposition of the asphalt emulsion)
On the other hand, if the toughness exceeds 320 kgf · cm, the binder (when asphalt emulsion is used as the binder, asphalt after decomposition of the asphalt emulsion) It is not preferred because it tends to be too sticky and too stiff and tends to become brittle against traffic loads.

Further, when the tenacity of the binder or the evaporation residue in the binder at 25.degree. On the contrary, when the tenacity exceeds 300 kgf · cm, the binder (when asphalt emulsion is used as the binder,
It is not preferable because the elongation of asphalt after decomposition of the asphalt emulsion becomes too large.

Here, the penetration and softening point were determined according to JIS K22.
07, and the toughness and tenacity are described in “Handbook of Paving Test Methods”, Japan Road Association, 1995
Issued on June 10, pp. 456-461, "Toughness
It is measured based on the “tenacity test method”.

<Decomposition Aid> As the decomposition aid used in the present invention, any one can be used as long as it can accelerate the decomposition of the asphalt emulsion used as the binder. When the emulsion is a cationic asphalt emulsion, one or more selected from the group consisting of an anionic emulsifier, an alkaline inorganic salt, an anionic polymer flocculant, an anionic asphalt emulsion, and an anionic latex Decomposition aids can be used.

Examples of usable anionic emulsifiers include carboxylic acid salts such as soaps; higher alkyl ether sulfates such as higher alcohol sulfates and higher alcohol ethoxylate sulfates; sulfated oils;
Sulfate esters such as sulfated fatty acid esters and sulfated olefins; alkyl allyl sulfonates, α-
Olefin sulfonates, naphthalene sulfonates, formalin-modified naphthalene sulfonates, lignin sulfonates, alkylbenzene sulfonates such as ammonium alkylbenzene sulfonate, sodium alkylbenzene sulfonate and potassium alkylbenzene sulfonate;
Sulfonates such as metal salts of di-octyl-sulfo-succinic acid such as sodium di-octyl-sulfo-succinate, metal salts of alkylmethyltauric acid such as sodium alkylmethyltaurate; phosphate ester salts And natural fatty acid salts such as sulfonic acid salts such as lignin and carboxylate salts such as rosin and tall oil.

Examples of usable alkaline inorganic salts include soda salts such as caustic soda, urea, ammonium bicarbonate, and the like.
Ammonium salts such as ammonium nitrate, aluminum ammonium sulfate, ammonium chloride, and ammonium phosphate, and the like. In addition, higher alcohol ethoxylates, alkali lignic acids, alkali salts of casein, and polyacrylic acid are also used as decomposition aids in the present invention. it can.

The decomposition aids as described above are one of them.
Species or two or more can be used.
Alkyl benzene sulfonate, alkyl benzene sulfonate, alkyl benzene sulfonate such as potassium alkyl benzene sulfonate, or sodium alkyl methyl taurate, di-octyl sulfo sodium succinate, the curing speed is fast,
Moreover, a surface treatment layer having excellent strength and durability can be obtained, and among these, it is more preferable to use an alkylbenzene sulfonate such as sodium alkylbenzene sulfonate, ammonium alkylbenzene sulfonate, and potassium alkylbenzene sulfonate. ,
Among the alkylbenzene sulfonates, it is most preferable to use sodium alkylbenzene sulfonate.

The above-mentioned decomposition aid for the cationic asphalt emulsion is preferably used in the form of an aqueous solution. If the concentration of the aqueous solution of the decomposition aid is less than 1.5 w / w%, the effect of promoting the decomposition of the cationic asphalt emulsion cannot be expected.
If it exceeds w / w%, the decomposition rate of the cationic asphalt emulsion becomes too high, which hinders the construction work.

In the present invention, the ratio of the decomposition aid which is brought into contact with and mixed with the cationic asphalt emulsion as the binder is such that the amount of the decomposition aid is 100 parts by weight of the evaporation residue in the cationic asphalt emulsion. The amount of the active ingredient in the aqueous solution is preferably in the range of 0.4 to 4.0 parts by weight. If the amount of the active ingredient in the aqueous solution of the decomposition aid is less than 0.4 parts by weight, the effect of accelerating the decomposition of the asphalt emulsion cannot be expected. If it exceeds 4.0 parts by weight, the decomposition rate of the asphalt emulsion becomes too fast. It will hinder construction work.

On the other hand, when an anionic asphalt emulsion is used as a binder, divalent inorganic salts such as calcium chloride; inorganic acids such as hydrochloric acid, formic acid, and phosphoric acid; acetic acid, citric acid, and the like; Rosinamine, ethylene oxide adducts of amines, alkylmonoamine hydrochloride or acetate, alkyldiamine hydrochloride or acetate, alkyltriamine hydrochloride or acetate, and alkylamines; diamide, amidoamine and other amidoamines Hydrochloride or acetate of imidazoline such as polyaminoethylimidazoline; hydrochloride or acetate of alicyclic monoamine, diamine or triamine having a long-chain alkyl group, or salt of polyoxyethylene alkylamine Hydrochloride or acetate; hydrochloride or acetate of aminated lignins; A water-soluble or water-dispersible salt obtained by reacting an acid such as hydrochloric acid, sulfamic acid, or acetic acid with a min-based cationic surfactant; a hydrochloride or acetate of an amine oxide; Examples thereof include quaternary ammonium salts, and one or more of these can be used as a decomposition aid. Among them, it is preferable to use a water-soluble salt of an amine-based cationic surfactant such as alkyl monoamine hydrochloride or acetate, alkyl diamine hydrochloride or acetate, alkyl triamine hydrochloride or acetate. In addition, a nonionic surfactant such as exciethylene / oxypropylene block copolymer can be used together with these decomposition aids.

When a nonionic asphalt emulsion is used as the binder, it is desirable to use a polymer flocculant as a decomposition aid, and the polymer flocculant has a molecular weight of about 1,000 to several tens of thousands. Low anionic polymer flocculants such as sodium alginate; cations such as water-soluble aniline resin hydrochloride, polythiourea acetate, polyethyleneaminotriazole, polyvillylbenzyltrimethylammonium chloride and chitosan Non-ionic polymer coagulants such as starch and water-soluble urea resin; amphoteric polymer coagulants such as gelatin; and high polymerization having a molecular weight of several hundred thousand to several million For example, sodium polyacrylate, maleic acid copolymer salt, polyacrylamide partially hydrolyzed salt, etc. On high molecular flocculant; polyethylene amines, cationic polymer flocculant, such as vinyl vinylpyridine copolymer salts; polyacrylamides, such as a non-ionic polymeric flocculant, such Poriokishiechin. One or more of the above-mentioned polymer flocculants are used.

The above-mentioned decomposition aid for anionic or nonionic asphalt emulsion is desirably used in the form of an aqueous solution.
The range of w / w% is good. The concentration of the aqueous solution of the decomposition aid is 1.
If it is less than 5 w / w%, the effect of promoting the decomposition of an anionic or nonionic asphalt emulsion cannot be expected, and
If the concentration of the aqueous solution of the decomposition aid exceeds 20 w / w%, the decomposition speed of the anionic or nonionic asphalt emulsion becomes too high, which hinders the construction work.

In the present invention, the ratio of the decomposition aid which is brought into contact with and mixed with the anionic or nonionic asphalt emulsion as the binder is based on 100 parts by weight of the residual evaporation in the anionic or nonionic asphalt emulsion. The amount of the active ingredient in the aqueous solution of the decomposition aid,
The range of 0.05 to 0.5 parts by weight is preferred. When the amount of the active ingredient in the aqueous solution of the decomposition aid is less than 0.05 part by weight, the effect of promoting the decomposition of the asphalt emulsion cannot be expected,
If the amount exceeds 0.5 parts by weight, the decomposition rate of the asphalt emulsion becomes too high, which hinders the construction work.

<Aggregate> The aggregate to be scattered on the binder in the present invention is any aggregate as long as it is an aggregate for pavement described in "Asphalt Pavement Outline" issued by the Japan Road Association. What can be used is, for example, crushed stone, cobblestone, gravel, steel slag and the like. In addition, asphalt-coated aggregates obtained by coating these aggregates with asphalt and recycled aggregates can also be used. In addition, it is possible to use artificially fired aggregates, fired expanded aggregates, artificial lightweight aggregates, ceramic particles, loxobites, aluminum particles, plastic particles, ceramics, emery, construction waste materials, fibers, etc. it can.

When the aggregate used in the present invention is coated with asphalt or the like, the amount of asphalt necessary for coating is in the range of about 0.1 to 1.5% by weight. In the case of porous aggregate such as steel slag, the amount is larger in the above range, and in the case of non-porous aggregate such as hard sandstone, the amount is smaller in the above range.
Asphalt and the like used for coating include asphalt, asphalt emulsion, and modified asphalt and modified asphalt emulsion obtained by modifying these with rubber or polymer. Also, aggregates spray-coated with kerosene or the like may be used.

The functional aggregates include colored aggregates having various colors, light reflectivity, glitter, fluorescence, and / or color.
Or one or two selected from a phosphorescent aggregate, an aggregate having an antifreezing effect, and an elastic aggregate.
It is possible to use more than one kind of aggregate. For example, as colored aggregates, natural colored aggregates, artificially fired aggregates, fired expanded aggregates, artificial lightweight aggregates, ceramic grains, luxovite,
Among aluminum grains, plastic grains, ceramics, emery and the like, colored ones may be mentioned. In addition, these colored aggregates are usually used without a precoat, but when used by precoating, it is a matter of course to use a material that does not impair the colored properties originally possessed by the aggregates. is there. Further, it is also possible to apply a coating with colored asphalt, a fluorescent paint or a luminous paint to an ordinary aggregate to use it as a colored aggregate, a fluorescent aggregate or a luminous aggregate.

Light-reflecting, glittering, fluorescent, and / or
Luminescent aggregates include glass beads, silicon carbide grains, fused alumina-based artificial aggregates, limestone-based artificial aggregates, feldspars, quartz, aluminum silicofluoride grains, glass scraps such as crushed glass bottles, and fluorescent artificial aggregates. Aggregate, luminous aggregate and the like can be mentioned.
Aggregates having an antifreeze effect include rock salt and artificial antifreeze aggregates (for example, trade name "Koland", manufactured by Nichireki Co., Ltd.). As the aggregate having elasticity, for example, waste tire rubber particles, natural rubber particles, styrene
There are butadiene rubber particles, chloroprene rubber particles, and the like. If these elastic aggregates are used, not only can the surface-treated layer be given shock absorption, but also sound-absorbing and
Furthermore, it has the effect of being deformed by the weight of the passing vehicle during freezing in winter and destroying the attached ice. Further, one kind or two or more kinds of aggregates having different stone qualities, types, and colors may be used, and / or one kind or two or more kinds of aggregates having different functions may be used in combination. For example, an aggregate having different functions may be used for each of the layers to be constructed, for example, using a brilliant aggregate, and using a colored aggregate for a layer immediately below.

Among the above aggregates, the aggregate used for the lowermost layer is, as described later, when the minimum particle size of the aggregate is less than 10 mm in the nominal size of the opening of the sieve, The difference between the particle size and the maximum particle size is 2m as the nominal size of the sieve aperture.
When the minimum particle size is 10 mm or more in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is the nominal size of the sieve opening. 3m
It is desirable to be more than m and 6 mm or less. The "nominal size of the sieve opening" referred to in this specification is a nominal size commonly used when expressing a sieve, and is defined by JIS.
The reference size of the opening of the screen sieve specified in Z8801 has a correspondence as shown in Table 1.

[0065]

[Table 1]

That is, in the present specification, the minimum size of the aggregate is less than 10 mm in the nominal size of the sieve opening is defined as the standard size of the mesh of the mesh sieve specified in JIS Z8801 as 9.2. It means that it contains aggregate particles passing through a 5 mm sieve, and that the minimum particle size of the aggregate is 10 mm or more in the nominal size of the sieve opening means that the aggregate is JIS Z88.
The standard size of the mesh sieve specified in 01 is 9.5m
m means that it does not contain aggregate particles passing through the sieve. In addition, the difference between the minimum particle size and the maximum particle size is 2 mm or more in the nominal size of the sieve aperture, and when the minimum particle size is 5 mm in the nominal size of the sieve aperture, the maximum particle size of the aggregate A diameter sieve shall pass at least a sieve having a nominal size of at least 2 mm greater than 5 mm, i.e., a sieve having a nominal size of 7 mm, but not passing through a sieve having a nominal size of 6 mm smaller than that. Means and also
When the difference between the minimum particle size and the maximum particle size is less than 5 mm in the nominal size of the sieve aperture, when the minimum particle size is 5 mm in the nominal size of the sieve aperture, the maximum particle size of the aggregate The sieve has a nominal size of less than 5 mm than 5 mm,
That is, it means passing through a sieve having a nominal size of 8 mm. Similarly, when the difference between the minimum particle size and the maximum particle size is more than 3 mm and 6 mm or less in the nominal size of the sieve aperture, when the minimum particle size is 10 mm in the nominal size of the sieve aperture, The largest particle size of the population is at least a sieve having a nominal size of 3 mm larger than 10 mm, ie, a sieve having a nominal size of 6 mm larger than 10 mm without passing through a sieve having a nominal size of 13 mm, that is, a sieve having a nominal size of 16 mm. Means passing through a sieve.
Note that whether to pass through the sieve or not to pass through is a judgment at a substantial and common sense level, and that some dust-like substances pass through the sieve or If any grains remain on the sieve, but are negligible in the aggregate aggregate, they shall not affect the decision not to pass through the sieve. Hereinafter, in this specification, unless otherwise specified, the particle size and particle size of the aggregate are based on the nominal size of the sieve opening.

The aggregate used for the lowermost layer in the present invention is:
The upper and lower limits of the particle size are not particularly limited as long as the above-mentioned conditions of the particle size are satisfied, but if possible, the minimum particle size is preferably 5 mm or more and the maximum particle size is 20 mm or less. If the minimum particle size is less than 5 mm, the particle size of the aggregate is too small, and there is a possibility that unevenness and cracks on the road surface may not be effectively covered. In addition, the spread thickness of the aggregate itself approaches the layer thickness of the binder scatter layer formed on the road surface by the scattered binder, and in some cases, the spread of the aggregate is greater than the layer thickness of the binder. The thickness becomes smaller, which is one of the causes of flash. On the other hand, if the maximum particle size exceeds 20 mm, not only does the road surface after construction become rough, but also because the vehicle travels on the surface treatment layer, the traffic noise generated by the traveling of the vehicle increases, The material may be scattered, which is not preferable.

[0068] The aggregate used in the layers other than the lowermost layer is not particularly limited in the particle size. Usually, an aggregate having a smaller diameter than the aggregate used in the lower layer is used. It is preferable to use fine sand, medium sand, coarse sand, and particles having a particle size of about No. 7 crushed stone having a particle size of 2.5 to 5 mm for the uppermost layer.

<Fiber material> As the fiber material used in the present invention, synthetic fibers such as polyester, polyamide, aromatic polyamide, polypropylene, vinylon, acryl and polyvinylidene chloride, or semi-synthetic fibers, natural fibers,
Various materials such as glass fiber, recycled fiber, carbon fiber, and metal fiber are used, and among them, polyester fiber is preferable.

These fibers can be used as short fibers cut to an appropriate length, but may also be used as monofilaments, multifilaments obtained by bundling a large number of monofilaments, or spun yarns or twisted yarns. It is possible, and furthermore, it is also possible to use it in the form of a sheet as a nonwoven fabric, a woven fabric or a knitted fabric.

There is no particular limitation on the length of the short fiber, but if it is too short, the surface treatment layer has no effect on maintaining the strength of the fiber by the fiber, waterproofing performance, and preventing cracking. It is preferably about 70 mm.

Next, the functional multi-layer spray type surface treatment method of the present invention will be described.

First, the construction road surface is cleaned with a road sweeper, and then a binder is sprayed. Prior to spraying the binder, water or primer may be sprayed. Water is sprayed, for example, when using an asphalt emulsion as a binder to increase the adhesion and conformability between the asphalt emulsion and the road surface, and also has the effect of lowering the elevated road surface temperature in summer. On the other hand, the primer is used when, for example, heated asphalt is used as the binder, and has an effect of enhancing the adhesiveness and conformability between the heated asphalt and the road surface. The amount of the binder to be scattered is not particularly limited as long as the aggregate is bonded to the road surface, but the amount of scatter per layer is preferably in the range of 60 to 250 liters per 100 m ² . If the amount of binder per 100 m ² is less than 60 liters, there is a possibility that the bonding strength and adhesion between the road surface and the aggregate and between the aggregates and the aggregate may be insufficient. Cause. The amount of the binder to be scattered varies according to the particle size of the aggregate. Generally, the more the aggregate having a larger particle size is used, the larger the amount of the binder scattered.

After dispersing the binder, the aggregate is dispersed on the dispersed binder. Usually, the amount of spray per layer of aggregate is 1
Range of 00m ² per 0.4～2.5M ³ are preferred. 1
When the scattering amount of 00m ² per aggregate is less than 0.4 m ^3, cause flashing phenomenon, conversely, when the aggregate amount of ² per 100m exceeds 2.5 m ^3, the excess of the aggregate is Buseoksa This not only hinders the traffic of vehicles but also makes it difficult for pedestrians to walk. Also, it is desirable that the larger the aggregate particle size, the larger the amount of aggregate to be scattered. In addition, the aggregate is usually sprayed at normal temperature.
Spraying may be performed in a state of being heated to -170 ° C.

Subsequently, the same operation is repeated according to the number of layers to be constructed, except that the aggregate to be scattered to the layer after the one to be scattered is changed to a smaller diameter than the aggregate to be scattered to the layer before the layer. When building the upper layer, as the aggregate, colored aggregate, light reflective,
1 selected from a brilliant and / or fluorescent aggregate, an aggregate having an antifreezing effect, and an elastic aggregate
Spray seed or two or more functional aggregates. By appropriately selecting the types and combinations of functional aggregates to be sprayed, various functions can be imparted to the surface treatment layer to be constructed.

It is desirable that the above-described sprinkling of the binder and the sprinkling of the aggregate be performed at a fixed, short time interval as much as possible. For example, Japanese Patent Application No. 11-1 by the same applicant
No. 45614, Japanese Patent Application No. 11-145612, Japanese Patent Application No. 10-172107, Japanese Patent Application No.
No. 172119 and Japanese Patent Application No. 10-17798
It is desirable to use a work vehicle as disclosed in the specification of Japanese Patent Application Laid-Open Publication No. 6-64. In the work vehicle disclosed in these specifications, the binder spraying device and the aggregate spraying position are both in front of the front wheel of the work vehicle, between the front wheel and the rear wheel, or behind the rear wheel. The aggregate is scattered immediately after the binder is scattered, so that the tires or crawlers of the working vehicle do not step on the scattered binder, and the binder once scattered. There is no danger of peeling off or adhering to tires or the like and soiling other road surfaces. Moreover, in the work vehicle disclosed in the above specification, both the dispersing device for the binder and the dispersing device for the aggregate are mounted on a single work vehicle, and the respective dispersing operations are performed. It is possible to manage and construct the entire process from the dispersal of the binder to the dispersal of the aggregate as a consistent operation, and it is possible to construct a stable and stable surface treatment layer with high durability. Examples of such a working vehicle are shown in FIGS.
Shown in

FIG. 2 shows an example of a work vehicle in which the binder dispersing device and the aggregate dispersing device are both arranged before the front wheels of the work vehicle. In FIG. , 6a,
Numeral 6b denotes a front wheel and a rear wheel of the work vehicle 5, 7 denotes a spray nozzle as a binder dispersing device, and 8 denotes an aggregate bin as an aggregate dispersing device. Examples of the aggregate bin include the above-mentioned Japanese Patent Application Nos. 11-145614, 11-145612, and 1 by the same applicant.
No. 0-172107, Japanese Patent Application No. 10-172119
And those mounted on a working vehicle disclosed in Japanese Patent Application No. 10-177886. The binder is carried in from a supply vehicle (not shown) via a carry-in socket denoted by reference numeral 9, is pressure-fed to a spray bar 11 by a carrier pump 10, and is sprayed from a spray nozzle 7 toward a road surface. Spray nozzle 7 for binder
It is also possible to provide a spray nozzle for the decomposition aid in the vicinity of the spray nozzle or a spray nozzle for water or primer in the vicinity of the spray nozzle 7 for the binder.

On the other hand, the aggregate is introduced into the aggregate bin 8 from the aggregate transport vehicle 12, and from the space between the aggregate scatter width adjusting door 13 and the aggregate transport roll 14, as the aggregate 3 on the binder. Sprayed. In addition, 15 is a supporting arm, 16 is a push roller for pushing the rear wheel of the aggregate transport vehicle 12, and 17 is an engine.

FIG. 3 shows an example of a work vehicle in which a binder dispersing device and an aggregate dispersing device are both disposed between a front wheel and a rear wheel of a work vehicle. The same reference numerals are given. The work vehicle 5 shown in FIG. 3 includes a storage tank 18 of a binder with a heat retaining / heating device.
At 8, a binder is introduced from a supply vehicle (not shown) via a carry-in socket 9, and is maintained at, for example, a predetermined temperature. 19 is a water tank, 21 is a primer tank. The binder is pumped by a transport pump 10 to a spray bar 11 and sprayed from a spray nozzle 7. Aggregate is sprinkled from the aggregate bin 8 onto the layer of binder, as in the example of FIG. Reference numeral 20 denotes a mounting table on which the rear wheels of the aggregate transport vehicle 12 are mounted, reference numeral 22 denotes a spray bar for water or primer, and reference numeral 23 denotes a spray nozzle for water or primer. 24 is a work step, 2
5 is a heating device for heating the road surface, 26 is a heating device 25
Energy source. Spray nozzle 7 for binder
It is also possible at any time to provide a spray nozzle for the decomposition aid in the vicinity of.

FIG. 4 shows an example of a work vehicle in which the sprinkling device for the binder and the sprinkling device for the aggregate are both arranged behind the rear wheel of the work vehicle, and is the same as in FIGS. 2 and 3. Are given the same reference numerals. After the binder is carried in from a supply vehicle (not shown) through the carry-in socket 9, the binder is temporarily stored in a tank provided with a heat retaining / heating device (not shown) in the work vehicle 5 and is sprayed on the road surface from the spray nozzle 7. . On the other hand, the aggregate is carried into the aggregate popper 27 from an aggregate carrier (not shown),
It is conveyed to the conveyor 28 and scattered from the aggregate bin 8. A spray nozzle for a decomposition aid can be provided at any time in the vicinity of the spray nozzle 7 for the binder.

When a two-pack type resin is used as the binder, a mixture of the two may be sprayed immediately before spraying. The main agent may be sprayed with water or a spraying agent for the primer from a spray nozzle for the primer, and the two may be contact-mixed in the air or on the road surface. Also, separately
Needless to say, a nozzle for a curing agent may be provided.

After the aggregate is sprayed, it is desirable to roll the spraying surface. As the rolling machine, for example, a self-propelled rolling machine such as a tire roller, an iron wheel roller, and a vibration roller can be used. When the last layer is completed, these rolling machines lightly compact the spray surface of the last layer, and finally, the road sweeper removes the floating stones and opens to traffic.

Further, in the functional multi-layer type spraying type surface treatment method of the present invention, the fiber material is sprayed or spread at the same time as or simultaneously with the spraying of the binder. May be. In order to spray or spread the fiber material at the same time as or before and after the application of the binder, it is desirable to use, for example, a work vehicle as shown in FIG. The work vehicle in FIG. 5 is an example of a work vehicle in which a binder dispersing device, an aggregate dispersing device, and a fiber material dispersing or spreading device are all disposed behind the rear wheels of the work vehicle. 2 to 4 are denoted by the same reference numerals.

In FIG. 5, reference numeral 29 denotes an apparatus for accommodating a fiber material such as a monofilament, a multifilament, a spun yarn and a twisted yarn. Is to be injected. The fiber material storage device 29 can store the short fibers 32 together, and the short fibers 32 are also jetted from the nozzle 31. In the illustrated example, the fiber material is sprayed after the binder is sprayed from the nozzle 7. However, the distance between the nozzle 7 of the binder and the nozzle 31 of the fiber material is reduced, and the two are separated. It is also possible to spray at the same time and to mix with each other in the air. In addition, it is possible to provide a spray nozzle for a decomposition aid or a spray nozzle for water or a primer at any time near the spray nozzle 7 for the binder. Spreading device for binders, sprinkling device for aggregates, and sprinkling or spreading device for fiber materials are all arranged in front of the front wheels of the work vehicle,
Of course, it can be placed between the front and rear wheels of the work vehicle,
It is possible.

Although not shown in the figure, it is also possible to separately provide a nozzle for injecting a fiber material such as a monofilament, a multifilament, a spun yarn and a twisted yarn in the width direction of the working vehicle. By injecting the fiber material in the vehicle width direction of the work vehicle by using the nozzles that are not used, and by injecting the fiber material from the nozzle 31 in parallel with the traveling direction of the work vehicle, a direction in which the same or different fiber materials are orthogonal to each other on the road surface. It is also possible to deposit them on.

On the other hand, reference numeral 33 denotes a storage device for a sheet-like fiber material 34 such as a nonwoven fabric, a woven fabric, or a knitted fabric, and the sheet-like fiber material is wound and held in a roll shape. The sheet-like fiber material is sent out by the sending-out device 35 and spread on the road surface. Reference numeral 36 denotes a pressing roller for bringing the fed sheet-like fiber material 34 into close contact with the road surface. The amount of fiber used is a basis weight, usually 25 g.
/ M ² to 150 g / m ² , preferably 5
0 g / m ² to 120 g / m ² .

As described above, by sprinkling or spreading the fiber material at the same time as or before and after the binder, the binder and the fiber material are mixed with each other and impregnated, thereby firmly bonding the aggregate. Thus, a surface treatment layer having not only excellent durability and stability, but also excellent crack followability and waterproofness can be constructed. The spraying or spreading of the fiber material may be performed in any of the layers to be constructed,
When constructing the lowermost layer, it is desirable to spray or spread it at the same time as or before or after the heating type binder.

In a preferred embodiment of the functional multi-layer spraying type surface treatment method of the present invention, when an asphalt emulsion is used as a binder, a decomposition aid may be used at the same time as or before or after the asphalt emulsion. Is sprayed on the road surface. When the asphalt emulsion and the decomposition aid are sprayed on the road surface one after another, the asphalt emulsion may be first sprayed on the road surface or the surface treatment layer, and then the decomposition aid may be sprayed on the spray surface. Alternatively, on the contrary, the decomposition aid may be sprayed on the road surface or the surface-treated layer first, and then the asphalt emulsion may be sprayed on the spray surface. Also,
Further, after the asphalt emulsion and the decomposition aid are sprayed in this order, the asphalt emulsion may be sprayed again, or the decomposition aid and the asphalt emulsion may be sprayed in this order, and then the decomposition aid may be spread again. The agent may be sprayed.

In any case, the asphalt emulsion and the decomposition aid are sprayed on the road surface or the surface treatment layer in succession, so that the asphalt emulsion and the decomposition aid meet on the road surface or the surface treatment layer, Upon contact with each other, the decomposition aid of the asphalt emulsion is started by the decomposition aid, and the asphalt emulsion is decomposed and hardened in a shorter time than when the asphalt emulsion is used alone. As described above, a preferred example of the multi-layer spray type surface treatment method of the present invention includes a step of spraying an asphalt emulsion and a decomposition aid on a road surface one after another, so that the conventional spray type surface treatment method is used. Compared with the construction method, it is possible to construct a spray-type surface treatment layer that is strong, durable, and excellent in stability with shorter curing time.

However, as will be described later, in the functional multi-layer spray type surface treatment method of the present invention, an asphalt emulsion and a decomposition aid are sprayed on a road surface or a surface treatment layer at the same time, and both are sprayed. Collision on road surface or surface treatment layer,
By contacting, more preferably, the asphalt emulsion and the dissolution aid are sprayed at the same time, and the two are collided and contacted in the air, so that they are strong, durable and have excellent stability with a shorter curing time. It is possible to construct a spray type surface treatment layer.

The reason is considered as follows. That is, as an example in which the asphalt emulsion and the decomposition aid are applied one after the other, as shown in FIG. 6, for example, as shown in FIG. Considering the case of spraying, a layer of the asphalt emulsion 37 and a layer of the decomposition aid 38 are formed on the road surface 1 immediately after the spraying. The asphalt emulsion 37 and the decomposition aid 38 come into contact with each other at the interface between the two layers,
By mixing, the action of promoting the decomposition of the asphalt emulsion 37 by the decomposition aid 38 is started. As a result, at the boundary between the layer of the asphalt emulsion 37 and the layer of the decomposition aid 38,
A layer 39 in which the asphalt emulsion 37 is being decomposed and hardening is formed. By the formation of this layer 39,
Conversely, further contact and mixing of the undecomposed asphalt emulsion 37 and the decomposition aid 38 are prevented, and
The result is that the dissipation of moisture from the layer of asphalt emulsion 37 is prevented. Therefore, it is considered that it is difficult to sufficiently mix the asphalt emulsion 37 and the decomposition aid 38 in a short time. The same applies to the case where the order of application of the asphalt emulsion 37 and the decomposition aid 38 is reversed, and when the asphalt emulsion and the decomposition aid are sprayed on the road surface one after the other, the decomposition aid is used. Although the curing time can be reduced to some extent by the presence of the agent, the advantage of using a decomposition aid cannot be said to be fully utilized.

On the other hand, when the asphalt emulsion and the decomposition aid are sprayed at the same time so that the two collide and come into contact with each other on a road surface or a surface treatment layer, more preferably, in the air, The mixing of the asphalt emulsion and the decomposition aid becomes more uniform and complete, and the advantages of using the decomposition aid can be fully utilized. However, even in this case, rather than spraying the asphalt emulsion and the decomposition aid at the same time and colliding and contacting both on the road surface or on the surface treatment layer, the two are colliding and contacting in the air. Is preferred. The reason is considered as follows. That is, even when the asphalt emulsion and the decomposition aid are sprayed at the same time, and the two are colliding and contacting on the road surface or on the surface treatment layer, a certain uniform mixing state can be realized. As soon as the decomposition aid reaches the road surface or the surface treatment layer, it loses momentum and stops, so even if it is possible to realize a uniform mixing state of both, there is naturally a limit. However, when the asphalt emulsion and the decomposition aid collide and come into contact in the air,
Even after collision and contact, both are still in a state of motion, and before reaching the road surface or the surface treatment layer, further asphalt emulsion particles, decomposition auxiliary particles, or asphalt emulsion particles and decomposition auxiliary particles and It is thought that repeated collision and contact with the particles of the combined body of the above are repeated and a very uniform mixed state is realized.

The case where the asphalt emulsion and the decomposition aid are collided and brought into contact with each other in the air, and the two are shockedly mixed and stirred will be described in more detail with reference to the drawings.

FIG. 7 is a diagram showing only the binder spraying apparatus used in the functional multi-layer spraying type surface treatment method of the present invention, wherein 1 is a road surface, and 11 is a binder spraying apparatus. Spray bars, 7-1, 7-2, 7-3, ...
Is a spray nozzle attached to the spray bar 11 for spraying the binder. 37-1, 37-2, 3
7-3,... Are asphalt emulsions as binders ejected from the respective spray nozzles. Any type of spray nozzles may be used as the spray nozzles 7-1, 7-2, 7-3,.
Spray nozzle with a spray pattern of a circular whole shape,
Square full-surface injection pattern, annular injection pattern,
Although it may have other injection patterns,
From the viewpoint of achieving uniform distribution, it is desirable to use a spray nozzle having a flat spray pattern as shown in FIG. The flat spray pattern is a substantially linear spray pattern in which a cross section perpendicular to the spray direction is elongated in a fan shape at a certain spray angle α from a spray nozzle. The flat surface refers to the surface of a fan having a fan-shaped spray pattern.

FIG. 8 is a plan view of FIG. 7 as viewed from above. As shown in FIG.
-1, 7-2, 7-3,... Are usually asphalt emulsions 37-1, 37-
The flat surfaces of the spray patterns 2, 37-3,... Are arranged so as to have a certain angle β (spray nozzle mounting angle) with the row direction of the spray nozzle row. The angle β is not particularly limited, and may be any number as long as it is in the range of 0 to 90 degrees.
From the viewpoint of canceling the non-uniformity by overlapping the spray pattern from each spray nozzle, usually 5 to 45 degrees,
Preferably, it is 10 to 40 degrees, more preferably 15 to 35 degrees.
Range of degrees. It is preferable that the mounting angle β of the spray nozzle is the same in one spray bar.

As shown in FIGS. 7 and 8, asphalt emulsions 37-1, 37-2, 37-3 sprayed from the respective spray nozzles 7-1, 7-2, 7-3,. ...
When viewed from a horizontal direction orthogonal to the longitudinal direction of the spray bar 11, some of them overlap each other. For example,
7 and 8, the jetted asphalt emulsions 37-1, 37-2, 37-3,... Overlap with each other by ／ on the road surface 1. Such a spray bar 11 and spray nozzles 7-1, 7-2, 7-3,.
Is usually mounted on a work vehicle, and a spray bar 1 is applied to the road surface 1 as the work vehicle advances.
1, the asphalt emulsion 37-4 ejected from the spray nozzles 7-4, 7-3, 7-2 when viewed from a certain point on the road surface 1, for example, point A. , 37-3, and 37-2. Therefore, the point A is subjected to three times, that is, triple application. The overlapping number of the overlapping spraying is not limited to triple, and may be double or quadruple or more. It is preferable to spray it. The amount of this spray is the height of the spray nozzle from the road surface,
It goes without saying that it can be adjusted as appropriate by adjusting the spray angle α from the spray nozzles, the interval between the spray nozzles, and the like.

Now, in addition to the above-described apparatus for dispersing the binder, in one example of the apparatus used in the functional multi-layer type dispersing type surface treatment method of the present invention, a dispersing aid dispersing apparatus is additionally provided. FIG. 9 is a side view showing a state in which a dispersing device for dispersing agent and a dispersing device for dissolving aid are provided side by side. The tip is bent, and the injected decomposition aid 42 is arranged so as to collide with the asphalt emulsion 37 as a binder injected from the spray nozzle 7 in the air.

FIG. 10 is a top view of the apparatus of FIG. 9. As shown in FIG. 10, one spray nozzle for asphalt emulsion as a binder and one spray nozzle for a decomposition aid are used. For example, the asphalt emulsion 37-1 sprayed from the asphalt emulsion spray nozzle 7-1 corresponds to the decomposition aid 42- sprayed from the spray nozzle 41-1 for the decomposition aid. 1 collides in the air and spray nozzle 7-2 for asphalt emulsion
The decomposition aid 42-2 jetted from the spray nozzle 41-2 for the decomposition aid collides with the asphalt emulsion 37-2 jetted from the air in the air. Spray nozzle 7-1 for the asphalt emulsion in which the jetted asphalt emulsion or the decomposition aid collides with each other in the air,
7-2, ... and spray nozzle 41- for decomposition aid
, 41-2,... Are extremely strict, and the two correspond one-to-one. For example, a decomposition aid sprayed from a spray nozzle 41-2 for a decomposition aid. 4
No. 2-2 collides with the asphalt emulsion 37-2 jetted from the corresponding asphalt emulsion spray nozzle 7-2 only in the air, and collides with the asphalt emulsion jetted from another asphalt emulsion spray nozzle. There is no.

The spray nozzles 7-1, 7-2,... For the asphalt emulsion in which the jetted asphalt emulsion or the decomposition aid collide with each other in the air, and the spray nozzles 41-1 and 41-2 for the decomposition aid. ,... Are realized as follows. For example, in FIG. 10, taking as an example the decomposition aid 42-1 ejected from the spray nozzle 41-1 for the decomposition aid, assuming the asphalt emulsion 37-1 corresponding to the injected decomposition aid 42-1. The asphalt emulsion 37-2 ejected from the spray nozzle 7-2 for the asphalt emulsion which does not correspond to the asphalt emulsion 37-2 exists. , The decomposition aid 42-1 injected
Passes above the shoulder of the asphalt emulsion 37-2 in the foreground and the slope of the flared skirt, and asphalt emulsion 3-2
What is necessary is just to make it collide with 7-1. That is, in FIG. 7, when viewed from a horizontal direction orthogonal to the longitudinal direction of the spray bar 11, a horizontal line is formed from an intersection x between a right shoulder of the jetted asphalt emulsion 37-1 and a left shoulder of the jetted asphalt emulsion 37-2. 7 is shown as a line segment X. The decomposition aid 42-1 sprayed from the spray nozzle 41-1 for the decomposition aid in FIG. In this case, the spray nozzle for the asphalt emulsion and the spray nozzle for the decomposition aid can be made to correspond one-to-one with the passage at a position higher than the line segment X in. Spray nozzles 7-1, 7-2, 7- for asphalt emulsion so that the jetted asphalt emulsion and the decomposition aid have such a positional relationship.
3, spray nozzle 41-1 for a decomposition aid,
By arranging 41-2, 41-3,...
For example, the decomposition aid 42-3 sprayed from the spray nozzle 41-3 for the decomposition aid collides only with the asphalt emulsion 37-3 sprayed from the spray nozzle 7-3 for the asphalt emulsion, and the other adjacent ones. From the asphalt emulsion 37-2 or 37-4 sprayed from the asphalt emulsion spray nozzle 7-2 or 7-4.

Note that the spray nozzle 41 for the decomposition aid
Since the injection direction of the decomposition aid 42-1 from -1 is generally obliquely downward, the position at which the decomposition aid 42-1 passes over the asphalt emulsion 37-2 in front is slightly smaller than the line segment X. Asphalt emulsion 3
Asphalt emulsion 37-1 on 7-1 and decomposition aid 4
The collision position with 2-1 can be lowered to a position slightly lower than the line segment X as shown by the line segment Y in FIG.
However, since a large number of spray nozzles coexist in a narrow range, from the viewpoint of apparatus design, the collision position of the asphalt emulsion 37-1 and the decomposition aid 42-1 on the asphalt emulsion 37-1 is determined. , It is preferable to be slightly above the line segment X.

If the collision position Y between the asphalt emulsion and the decomposition aid is too low, the time from the collision of the asphalt emulsion and the decomposition aid to the drop on the road surface to lose momentum is too short, and the If the mixing ratio is too high, the jetted asphalt emulsion and the decomposition aid both collide with each other in a state where they are still hardened. Therefore, the height of the collision position Y is determined from the road surface 1 to the spray nozzle 7 for asphalt emulsion.
Assuming that the height up to -1 is H, (1/4) H to (3/4)
H is preferably in the range, more preferably (2/4) H to
(3/4) H range.

As described above, the spray nozzles 7-1, 7-2, 7-3,... For asphalt emulsion and the spray nozzles 41-1, 41-2, 41-3 for the decomposition aid.
.. Correspond one-to-one with each other, so that it is easy to control the quantitative ratio of the asphalt emulsion and the decomposition aid, and the collision conditions such as the collision speed and the collision position. It is possible to collide with the agent at an optimal ratio and under optimal collision conditions. As a result, it is needless to say that extremely uniform mixing of both is realized, and a shorter curing time can be realized.

In an example of the apparatus used in the functional multi-layer spraying type surface treatment method of the present invention, as shown in FIG.
.. indicates the corresponding asphalt emulsion 37-1,
Are jetted toward 37-2, 37-3,... So that the jet density at each of the collision positions Y1, Y2, Y3,. That is, the decomposition aids 42-1 and 42-2
, 42-3,... In the plan view of FIG.
The fan-shaped spray pattern is asphalt emulsion 37-
Vertical planes Z1, Z2, Z3,... With respect to the flat plane of the fan-shaped injection pattern of 1, 37-2, 37-3,.
Are jetted toward the asphalt emulsions 37-1, 37-2, 37-3,. Thereby, each of the collision positions Y1, Y2, Y
3. Decomposition aids 42-1, 42-2, 42 above
-3,... Are the collision positions Y1, Y2, Y
.. Become uniform over the entire width direction, and more uniform mixing of the asphalt emulsion and the decomposition aid is realized.

In the above example, the decomposition aid is obliquely made to collide with the asphalt emulsion jetted almost perpendicularly to the road surface. Conversely, the decomposition aid is applied vertically to the road surface. By jetting, the asphalt emulsion may be made to collide obliquely with the decomposition aid,
Furthermore, both the asphalt emulsion and the decomposition aid may be obliquely ejected and collided. However, considering that the amount of asphalt emulsion is larger and the main material, the decomposition aid obliquely collides with the asphalt emulsion sprayed almost perpendicular to the road surface as in the example described above. It is preferred that

The spray pressure from each spray nozzle is:
0.6 to 5.0 for both asphalt emulsion and decomposition aid
kgf / cm ² is preferable, and desirably 1.0 to
The range is 2.5 kgf / cm ² . Injection pressure is 0.6
If it is less than kgf / cm ² is less likely that the injection pattern be a good sector, and when the injection pressure exceeds 5 kgf / cm ^2, would have to be injected object is atomized, good spread film on the road surface Is difficult to form. The injection pressure of the asphalt emulsion and the decomposition aid may be the same, but it is desirable that the injection pressure of the decomposition aid be set slightly higher than the injection pressure of the asphalt emulsion.

Hereinafter, the present invention will be described in more detail using experimental examples.

<Experiment 1> Effect of Aggregate Particle Size on Bonding Strength to Road Surface In order to examine the effect of the aggregate particle size used on the durability of the spray-type surface treatment layer to be constructed, the adhesion described below was used. The property test was carried out according to the Vialit adhesion test method.

That is, aggregate samples having various minimum and maximum particle sizes as shown in Table 2 were prepared. For example, in Table 2, No. The aggregate sample indicated by No. 1 has a nominal size of 5 mm.
100% by weight between the sieve and 6mm sieve
Is an aggregate sample in which aggregate particles are distributed. 90 samples of each of these various types of aggregates were prepared, dried and allowed to stand under the conditions specified in the Biarrite adhesion test method.

On the other hand, thickness 2 mm, size 200 × 200
mm as many as the number of aggregate samples, and a modified asphalt (trade name “Gumphalt SS
P ", manufactured by Nichireki Co., Ltd.) to an aggregate sample having a minimum particle size of less than 10 mm so as to be 1.15 kg / cm ^2, and an aggregate sample having a minimum particle size of 10 mm or more. After applying 90 kg / cm ² of various kinds of aggregate samples, the linear pressure was 7 kgf / cm ^2.
A load of 15 cm was applied in a direction opposite to each other, and a total of 30 rotation pressures were applied. After leaving this for a predetermined time,
An iron ball having a diameter of 50 mm and a weight of 500 g was dropped onto the center of the metal plate three times within 10 seconds from above while holding the aggregate horizontally with the attachment surface of the aggregate down. The number of aggregate grains to which the binder was not attached among the aggregate grains that had fallen off the metal plate due to the fall of the iron ball was counted and designated as a. The aggregate remaining on the metal plate was peeled off by hand, and the number of aggregate particles to which no binder was attached was counted as d. The adhesion rate (%) is the adhesion rate (%)
= {(90-ad) / 90} x 100. The test was performed three times for each sample, and the results were averaged, and those having an adhesion rate of 80% or more were evaluated as satisfactory. Table 2 shows the results.

[0110]

[Table 2]

As is clear from Table 2, the minimum particle size is 10
In the case of an aggregate sample of less than 2 mm, the difference between the minimum particle size and the maximum particle size is 2 mm or more and 5 m
m, and in the case of an aggregate sample having a minimum particle size of 10 mm or more, the difference between the minimum particle size and the maximum particle size is more than 3 mm and 6 mm or less in the nominal size of the sieve aperture. But,
The adhesion rate was 80% or more, and it was found that when used in the spray type surface treatment method of the present invention, excellent bonding properties were exhibited.
The reason why such a result was obtained is not clear, but if the difference between the minimum particle size and the maximum particle size is too small, an increase in the bonding force due to the bite between the aggregates cannot be expected much, and Conversely, if the difference between the minimum particle size and the maximum particle size is too large, it is presumed that unequal force acts according to the difference in particle size.

<Experiment 2> Effect of binder viscosity on surface treatment layer uniformity—single layer In order to investigate the effect of binder viscosity on surface treatment layer uniformity, the absolute viscosity at 60 ° C. A binder having various values was prepared, and a binder for the first surface treatment layer was used as a binder for the first surface treatment layer on an experimental pavement having an irregular surface cut out for pavement replacement from a rutted road surface. .2 (liter / m
Sprayed at the rate of ² ). The difference between the concave portion and the convex portion was about 20 mm on average. Then, immediately, No. 1 used in Experiment 1 was used. The aggregate sample of No. 3 was sprayed from above at a rate of 9 (liter / m ² ), lightly compacted, and then cured until the binder hardened. After curing, cut the experimental pavement with a cutter,
The thickness of the binder at the bottom of the recess and the top of the projection was measured. The results are shown in Table 3 together with the type of binder used.

[0113]

[Table 3]

As is evident from the results in Table 3, the binder having an absolute viscosity of about 8,000 poise and about 13,000 poise at 60 ° C. tends to flow into the recesses on the road surface due to the effect of gravity after spraying, and stay on the road surface. At the top of the convex part, the thickness of the binder is as thin as about 1 mm or 1.5 mm,
Conversely, at the bottom of the recess on the road, about 4 mm or about 3.
A binder layer as thick as 5 mm was formed. Aggregate particles at the protrusions could be relatively easily peeled off when attempting to peel off with the tip of a spatula. Further, in the concave portion, the amount of the binder is too large, and there is a risk that a flash phenomenon may occur when the concave portion is actually used for traffic of a vehicle.

On the other hand, the absolute viscosity at 60 ° C. is about 150
When it is more than 00 poise, the flow of the binder is suppressed, and there is not much difference in the thickness of the binder layer at the bottom of the road surface concave portion and the top of the convex portion. An attempt was made to peel off the aggregate particles at the protrusions and recesses at the tip of the spatula, but they were so strongly bonded that they could not be easily peeled off. From the above, as the binder, the absolute viscosity at 60 ° C. was about 1
It was found that the use of a material having a poise of 5,000 poise or more does not cause the binder to flow on the road surface even if the road surface has irregularities, and can form a uniform surface treatment layer.

<Experiment 3> Influence of viscosity of binder or evaporation residue in binder on uniformity of surface treatment layer-In the case of multiple layers Table in which the first surface treatment layer was constructed in Experiment 2 3
No. in 2 and No. 2 On the experimental pavement of No. 4, furthermore, No. 7 crushed stone having a particle size of 2.5-5 mm and 6 of the evaporation residue
Using a plurality of binders having different absolute viscosities at 0 ° C., the spraying amount was adjusted to 1.0 (liter / m ² ) for the binder and 5.0 for the aggregate.
(Liter / m ² ) except that the second surface treatment layer was constructed in the same manner as in Experiment 2 described above. After curing, similarly to Experiment 2, the experimental pavement was cut with a cutter, and the total thickness of the binder at the bottom of the concave portion and the top of the convex portion was measured. The results are shown in Table 4 together with the type of binder used.

[0117]

[Table 4]

As is clear from the results in Table 4, the absolute viscosity at 60 ° C. of the binder or the evaporation residue in the binder was about 60 ° C. for both the first surface treatment layer and the second surface treatment layer. Sample No. 1 using a 13,000 poise binder was used. 6
In, the unevenness in the thickness of the binder was amplified by multi-layering, and the aggregate particles at the convex portions could be peeled off relatively easily when trying to peel off at the tip of the spatula . Further, in the concave portion, the amount of the binder is too large, and there is a risk that a flash phenomenon may occur when the concave portion is actually used for traffic of a vehicle. The first surface treatment layer has an absolute viscosity of 195 at 60 ° C.
Sample No. 1 in which a binder having an absolute viscosity of about 13,000 poise at 60 ° C. of the evaporation residue in the binder was used only in the second surface treatment layer using a binder of 00 poise. 7
Also, after spraying, the binder tended to flow into and stay in the recesses on the spraying surface due to the action of gravity, and non-negligible unevenness in the thickness of the binder at the tops of the protrusions and the bottoms of the recesses was observed. On the other hand, only the first surface treatment layer has 60
Sample No. 1 using a binder having an absolute viscosity of about 13,000 poise at ℃ 8 and No. In the case of No. 10, a somewhat good result was obtained, but it is presumed that the unevenness of the road surface was leveled out to some extent by the low-viscosity binder sprayed when constructing the first surface treatment layer. You.

Further, for both the first surface treatment layer and the second surface treatment layer, a binder having an absolute viscosity of about 15,000 poise or more at 60 ° C. of the binder or the evaporation residue in the binder is used. Sample No. 9 and No. 9 In No. 11, a uniform distribution of the binder was observed, and the most favorable result was obtained. An attempt was made to peel off the aggregate particles at the protrusions and recesses at the tip of the spatula, but they were so strongly bonded that they could not be easily peeled off. From the above, in the layers other than the lowermost layer, the absolute viscosity at 60 ° C. of the binder or the evaporation residue in the binder is about 15 as the binder.
It was found that if a material having a surface roughness of 000 poise or more was used, the binder could not flow on the construction surface even if the construction surface had irregularities, and a uniform surface treatment layer could be constructed.

<Experiment 4> Influence of the characteristics of the binder on the bonding strength with the road surface The effect of the characteristics of the binder or the evaporation residue in the binder on the durability of the scattered surface treatment layer to be constructed is examined. Therefore, ten kinds of anionic asphalt emulsions having various characteristics as shown in Table 5 in which the evaporation residue in the binder were prepared were prepared, and the adhesion test described below was carried out using Bialit (Vial).
it) It was carried out according to the adhesion test method. As the aggregate, No. 1 used in Experiment 1 was used. Sample No. 3 was prepared, dried and allowed to stand under the conditions specified in the Biarrite adhesion test method.
On the other hand, as a decomposition aid, a 10 w / w% aqueous solution of an alkyldiamine acetate (trade name “Cation DTA”, manufactured by NOF CORPORATION) is prepared, and the weight ratio of (the amount of the active ingredient in the aqueous solution of the decomposition auxiliary agent) is determined. ) / (Evaporation residue in asphalt emulsion) = 0.3 / 100.

On the other hand, thickness 2 mm, size 200 × 200
mm metal plates were prepared by the number of samples, and each of the above-mentioned ten kinds of anionic asphalt emulsions separately prepared as a binder and the decomposition aid were allowed to collide in the air using a flat spray nozzle. It was sprayed at a rate of 1.1 (liter / m ² ). Note that the scattering height H of the binder is
Was 50 cm, and the collision position between the binder and the decomposition aid was 30 cm from the spray surface, that is, (3/5) H. Next, aggregate was sprayed on the spraying surfaces of the binder and the decomposition aid, and the adhesion rate was determined in the same procedure as in Experiment 1. The adhesion rate (%) was calculated as the adhesion rate (%) = {(90-ad) / 90} × 100. Those with an adhesion rate of 80% or more were evaluated as being more satisfactory, those with an adhesion rate of 85% or more were more satisfactory, and those with an adhesion rate of 90% or more were evaluated as more satisfactory. Further, samples were prepared by spraying aggregates on 10 kinds of anionic asphalt emulsions in the same procedure except that the decomposition aid was not sprayed, and the same test was performed to determine the adhesion rate. The results are shown in Table 5.

[0122]

[Table 5]

As is apparent from Table 5, when the asphalt emulsion as the binder and the decomposition aid collided in the air, the physical properties of the evaporation residue in the anionic asphalt emulsion as the binder were reduced by needles. Penetration is 50 (1 / 10mm)
Above, 150 (1/10 mm) or less, softening point is 50 ° C. or more, 120 ° C. or less, and toughness at 25 ° C. is 70 kg.
f · cm or more, 320 kgf · cm or less, tenacity at 25 ° C. of 30 kgf · cm or more, 300 kgf · cm
cm or less, satisfactory results with an adhesion rate of 80% or more were obtained. The penetration of the evaporation residue in the asphalt emulsion is 70 to 125 (1/10 mm), and the softening point is 55 to 10
0 ° C, toughness of 90 to 250 kgf · cm, tenacity of 50 to 220 kgf · cm, adhesion rate 85%
The above satisfactory results were obtained, and the penetration of the evaporation residue was 90 to 120 (1/10 mm), and the softening point was 60.
In asphalt emulsions D and E having a toughness of 100 to 200 kgf.cm and a tenacity of 70 to 180 kgf.cm, a result of 90% or more in adhesion was obtained. However, when the softening point of the evaporation residue becomes Emulsion I at 120 ° C., the asphalt component obtained by decomposing the asphalt emulsion becomes somewhat softer, and the waist decreases somewhat,
There was a tendency for the adhesion rate to slightly decrease. Further, the softening point becomes higher, the softening point of the evaporation residue is 150 ° C., the penetration is 40 (1/10 mm), and the toughness is 360 kgf.
In the asphalt emulsion J having a cm and a tenacity of 350 kgf · cm, the asphalt component obtained by decomposing the asphalt emulsion became soft, the waist became weak, and the adhesion rate further decreased. On the other hand, almost the same results were obtained when the decomposition aid was not used, but the adhesion rate was generally lower than when the decomposition aid was used.

<Experiment 5> Effect of the viscosity of asphalt emulsion as a binder on the uniformity of a surface-treated layer In order to investigate the effect of the viscosity of asphalt emulsion as a binder on the uniformity of a surface-treated layer, an experiment was conducted in Experiment 2. No. 3 in Table 3 where the first surface treatment layer was constructed. Further, on the experimental pavement of No. 2, a No. 7 colored aggregate having a particle size of 2.5-5 mm (trade name "Twink Red", manufactured by Inner and Outside Ceramics Co., Ltd.) and viscosity at 20 ° C. show various values. Using an anionic asphalt emulsion, the application amount was asphalt emulsion 1.0 (liter / m ² ) and aggregate 5.0.
(Liter / m ² ), except that the second surface treatment layer was constructed in the same manner as in Experiment 2. After curing, as in Experiment 2, the experimental pavement was cut with a cutter, and the thickness of the asphalt emulsion decomposition product layer at the bottom of the concave portion and the top of the convex portion was measured. The results are shown in Table 6 together with the type of binder used.

[0125]

[Table 6]

As is clear from the results in Table 6, asphalt emulsions having viscosities of 19 and 32 centipoise at 20 ° C. tend to flow and stay in the recesses of the surface treatment layer already constructed by the action of gravity after spraying. On the top of the convex portion of the surface treatment layer, the thickness of the binder layer formed by decomposition of the asphalt emulsion is as thin as about 0.7 mm or 0.8 mm on average, and conversely, the thickness of the concave portion of the surface treatment layer is small. At the bottom, a thick binder layer was formed, averaging 1.5 mm or 1.2 mm. Aggregate particles at the protrusions could be relatively easily peeled off when attempting to peel off with the tip of a spatula. Further, in the concave portion, the amount of the binder is too large, and there is a risk that a flash phenomenon may occur when the concave portion is actually used for traffic of a vehicle.

On the other hand, when the viscosity at 20 ° C. becomes about 40 centipoise or more, the flow of the asphalt emulsion is suppressed, and the thickness of the binder layer formed by the decomposition of the asphalt emulsion at the bottom of the concave portion of the surface treatment layer and the top of the convex portion is reduced. There is not much difference. An attempt was made to peel off the aggregate particles at the protrusions and recesses at the tip of the spatula, but they were so strongly bonded that they could not be easily peeled off. Based on the above, if the viscosity at 20 ° C. of about 40 centipoise or more is used as the asphalt emulsion, the binder does not flow on the road surface or the surface treatment layer even if the road surface or the surface treatment layer has irregularities. It was found that a uniform surface treatment layer could be constructed.

<Experiment 6> Influence of the type of binder and the amount of decomposition aid used on film formation time Anionic asphalt emulsion (trade name "Sampisol A", manufactured by Nichireki Co., Ltd.) as a binder, decomposition aid The same one used in Experiment 4 was used while changing the amount of the active ingredient in the aqueous solution of the decomposition aid to 100 parts by weight of the evaporation residue of the anionic asphalt emulsion at various ratios. In the same manner as in the above, they were collided in the air and sprayed on a 30 cm × 30 cm × 5 cm asphalt concrete plate. After spraying, at various curing times, it was observed whether or not the sprayed surface changed from brown to black to form a decomposition film of an anionic asphalt emulsion. Further, as a binder, a general-purpose asphalt emulsion pk-4 (manufactured by Nichireki Co., Ltd.) for tack coating was used, and in the same manner except that no decomposition aid was used, the formation of a decomposition film on the spraying surface was similarly performed. The presence or absence was observed and used as a control.
The test temperature was 20 ° C.

The physical properties of the binders used are as follows. Anionic asphalt emulsion (trade name "Sanpysol A", manufactured by Nichireki Co., Ltd.) Evaporation residue: 67.5 (%) Penetration of evaporation residue: 87 (1/10 mm) Softening point of evaporation residue: 74 (° C.) Toughness of the evaporation residue at 25 ° C .: 175 (kgf
Cm) Tenacity of the evaporation residue at 25 ° C .: 160 (kg)
f · cm) Absolute viscosity of evaporated residue at 60 ° C .: 18000 (poise) Viscosity at 20 ° C .: 42 (centipoise) General-purpose asphalt emulsion for tack coating pk-4 (manufactured by Nichireki Co., Ltd.) Evaporated residue: 51 (% ) Penetration of evaporation residue: 62 (1/10 mm) Softening point of evaporation residue: 46 (° C) Toughness of evaporation residue at 25 ° C: 35 (kgf ·
cm) Tenacity of the evaporation residue at 25 ° C .: 5 (kgf · cm)
cm) Absolute viscosity of evaporation residue at 60 ° C .: 2000 (Poise)

Table 7 shows the results. In Table 7, ○ indicates that film formation was observed, and X indicates that no film formation was observed.

[0131]

[Table 7]

As is evident from the results in Table 7, when the decomposition aid is used in an amount of 0.05% by weight or more of the effective component in the aqueous solution, based on 100 parts by weight of the residual evaporation of the anionic asphalt emulsion. Shows that the time until film formation is significantly shortened, and the decomposition and hardening of the asphalt emulsion are remarkably promoted. Further, the anionic asphalt emulsion whose evaporation residue satisfies the characteristics a) to d) defined in the present invention, even when no decomposition aid is used, as compared with a conventional tack coat asphalt emulsion as a control. The decomposition, curing time was short.

<Experiment 7> Influence of the type of decomposition aid on film formation time and adhesion As the binder, the same anionic asphalt emulsion used in Experiment 6 (trade name "Sampisol A", Nichireki Co., Ltd.) And various types of decomposition aids were used, and both were collided in the air in the same manner as in Experiment 6.
Sprayed on a 30 cm × 30 cm × 5 cm asphalt concrete plate. After spraying, as in Experiment 6, at various curing times, it was observed whether or not the sprayed surface changed from brown to black to form a decomposed film of the asphalt emulsion. However, the evaporation residue 1 of the used asphalt emulsion
The experiment was carried out with the amount of the active ingredient in the aqueous solution of the decomposition aid being fixed at 0.3 part by weight per 00 parts by weight. In addition, the same test was carried out using only the asphalt emulsion without using the decomposition aid, and was used as a control.

At the same time, as in Experiment 4, except that the asphalt emulsion as the binder and the decomposition aid were used in the same combination as described above, and the curing time was variously changed, the difference in the decomposition aid caused the adhesion rate to change. The effects were examined. However, the experiment was carried out by fixing the amount of the active ingredient in the aqueous solution of the decomposition aid to 100 parts by weight of the evaporation residue of the used asphalt emulsion to 0.3 part by weight. Also, without using decomposition aids,
A similar test was performed using only the asphalt emulsion as a control. Table 8 also shows the results of observation of the presence or absence of film formation and the results of determination of the adhesion rate.

[0135]

[Table 8]

As is clear from the results in Table 8, among the various decomposition aids tested, acetates of alkylamine-based surfactants such as alkylmonoamine acetates and alkyldiamine acetates, and alkyl quaternary ammonium salts were used. Salt,
The film formation time and the adhesiveness were both excellent, and among them, the alkyl diamine acetate was the most excellent.

A similar test was conducted using a cationic asphalt emulsion (trade name “Sampisol K”, manufactured by Nichireki Co., Ltd.). Among the various decomposition aids tested, sodium alkylbenzene sulfonate, Alkyl benzene sulfonates such as ammonium alkyl benzene sulfonate, or sodium alkyl methyl taurate, sodium di-octyl sulfo succinate are excellent in both film formation time and adhesiveness. Alkylbenzenesulfonate such as ammonium alkylbenzenesulfonate was good, and further, sodium alkylbenzenesulfonate was most excellent. The physical properties of the cationic asphalt emulsion used are as follows. Cationic asphalt emulsion (trade name “Sanpysol K”, manufactured by Nichireki Co., Ltd.) Evaporation residue: 68 (%) Penetration of evaporation residue: 98 (1/10 mm) Softening point of evaporation residue: 67 (° C.) ) Toughness of the evaporation residue at 25 ° C: 180 (kgf
Cm) Tenacity of the evaporation residue at 25 ° C .: 160 (kg)
f · cm) Absolute viscosity of evaporation residue at 60 ° C .: 18500 (poise) Viscosity at 20 ° C .: 56 (centipoise)

<Experiment 8> Effect of spraying of binder and decomposition aid on film formation time and adhesion rate The same anionic asphalt emulsion used in Experiment 6 as a binder (trade name "Sanpysol A") , Manufactured by Nichireki Co., Ltd.)
10 w / of the same alkyl diamine acetate (trade name “Cation DTA”, manufactured by NOF Corporation) used in
The presence or absence of film formation and the adhesion ratio at various curing times were examined in the same manner as in Experiment 7, except that the spraying form was variously changed using a w% aqueous solution. However, the experiment was conducted with the amount of the active ingredient in the aqueous solution of the decomposition aid fixed at 0.3 part by weight based on 100 parts by weight of the residual evaporation of the anionic asphalt emulsion.

The spray form was changed as follows. In addition, the spraying height H of the binder was 5
0 cm. (1) After the asphalt emulsion is sprayed, a decomposition aid is sprayed on the spray surface. (2) After the decomposition aid is sprayed, the asphalt emulsion is sprayed on the spray surface. (3) The asphalt emulsion and the decomposition aid are sprayed. The two are simultaneously sprayed so that they collide on the surface (collision height H _Y = 0). (4) The asphalt emulsion and the decomposition aid are simultaneously sprayed so that they collide in the air on the spray surface (collision height H _Y =
(1/5) H) (5) The asphalt emulsion and the decomposition aid are simultaneously sprayed so that they collide in the air on the spraying surface (collision height H _Y =
(2/5) H) (6) Spray both the asphalt emulsion and the decomposition aid simultaneously so that they collide in the air on the spray surface (collision height H _Y =
(3/5) H) (7) The asphalt emulsion and the decomposition aid are simultaneously sprayed so that they collide in the air on the spray surface (collision height H _Y =
(4/5) H)

Table 9 shows the results.

[0141]

[Table 9]

As is evident from the results in Table 9, the asphalt emulsion and the decomposition aid were the same as those in (1) and (2) where the asphalt emulsion and the decomposition aid were sprayed one after the other. The spraying modes (3) to (7), which are sprayed at the appropriate time, were superior in both the film formation time and the adhesion rate, but the asphalt emulsion and the decomposition aid collided on the spraying surface (3) (4) to (7), the asphalt emulsion and the decomposition aid are collided in the air, rather than the spray form of (1).
A better result was obtained with the spraying mode. Further, among the spraying modes (4) to (7) in which the asphalt emulsion and the decomposition aid collide in the air, the collision height _HY is (1/1).
5) In the case of H (4) or (4/5) H (7)
The cases (5) and (6), which are (2/5) H and (3/5) H, are particularly superior to the case (2), and the collision height is (1) even in the case of an air collision. / 4) H ~
It can be seen that the range of (3/4) H is good.

Further, for each of the samples in which the film formation was observed for a curing time of 30 minutes, the film formation layer was partially broken at the tip of the spatula, and the internal state was examined. Although the interface between the asphalt emulsion and the decomposition aid formed a film, the roadside portion of the asphalt emulsion was still in a state before the film was formed. Similarly, in the sample of the spraying type (2), the interface between the asphalt emulsion and the decomposition aid formed a film, but the road surface side portion of the decomposition aid remained in a state before film formation in which water remained. there were. On the contrary,
In the samples in the scattered form (3) to (7), uniform film formation was observed.

When the same test was carried out using a cationic asphalt emulsion (trade name "Sampisol K", manufactured by Nichireki Co., Ltd.), similar results were obtained.

Hereinafter, the present invention will be further described with reference to examples, but it is needless to say that the present invention is not limited to these examples.

<Example 1> Using the following materials, the functional multi-layer type spraying type surface treatment method of the present invention was experimentally constructed using a work vehicle as shown in FIG. The traveling speed of the work vehicle was about 5 km / h. After spraying each aggregate, it was lightly rolled with a vibrating roller. Although there was a rut with a maximum depth of about 15 mm on the construction road surface, a uniform functional surface treatment layer could be constructed without the binder flowing. After construction, a half-day curing period allowed 17 volunteers to walk, and all 17 volunteers reported that the road had elasticity and walking was comfortable. In addition, a heavy-duty vehicle was tested 30 times.
The rubber particles as a functional aggregate were not scattered as a result of passing through the rubber once.

Aggregate (1st layer) Crushed stone (produced by Kuzu, Tochigi Prefecture) Particle size: 5-8 mm Pre-coated with 0.5 wt% straight asphalt Spraying temperature: heating (180 ° C.) Spraying amount: 0.7 (m ³⁾ / 100 m ² ) Binder (first layer) Modified asphalt (trade name “Gumphalt S-SP”,
Absolute viscosity at 60 ° C .: 19,500 poise Penetration 55 (1/10 mm) Softening point 67 (° C.) Toughness 172 (kgf / cm) Tenacity 156 (kgf · cm) Spraying temperature: heating (180 ° C.) Spray amount: 100 (l / 100 m ² )

[0148] Aggregate (second layer) rubber particle (styrene-butadiene) particle size: 1-6 mm Scatter Temperature: room temperature (18 ° C.) application rate: ^0.6 (m 3/100 m ²⁾ binder (second Layer) Modified asphalt (trade name "Gumphalt S-SP",
Absolute viscosity at 60 ° C .: 19,500 poise Penetration 55 (1/10 mm) Softening point 67 (° C.) Toughness 172 (kgf / cm) Tenacity 156 (kgf · cm) Spraying temperature: heating (180 ° C.) Spraying amount: 110 (l / 100 m ² )

[0149] Aggregate (third layer) rubber particle (styrene-butadiene) particle size: 1-3 mm Scatter Temperature: room temperature (18 ° C.) application rate: ^0.4 (m 3/100 m ²⁾ binder (third Layer) Modified asphalt (trade name "Gumphalt S-SP",
Absolute viscosity at 60 ° C .: 19,500 poise Penetration 55 (1/10 mm) Softening point 67 (° C.) Toughness 172 (kgf / cm) Tenacity 156 (kgf · cm) Spraying temperature: heating (180 ° C.) Spray amount: 100 (l / 100 m ² )

<Example 2> Using the following materials, a working vehicle having a dispersing aid dispersing device provided in the vicinity of the binder dispersing device in a working vehicle as shown in FIG. The functional multi-layer spray type surface treatment method of the present invention was applied. The traveling speed of the work vehicle was about 5 km / h. The height from the road surface to the spray nozzle of the binder is 50 cm, and when the first layer is constructed, the height of the binder is 30 cm from the road surface.
The position and angle of the spray nozzle for the decomposition aid were adjusted so that the decomposition aid collides at the position of cm. After spraying each aggregate, it was lightly rolled with a vibrating roller. On the construction road surface,
Although some cracks with a width of 5 mm or less were present, they were completely covered by the constructed surface treatment layer. The constructed surface treatment layer was uniform, bright red, and had a wonderful finish. After construction, after a half-day curing period,
An attempt was made to remove the aggregate grains at the driver's tip, but the bond was quite strong with the road. Further, when the vehicle was passed through a heavy load vehicle 30 times in a test, no scattering of the aggregate was observed.

[0151] Aggregate (first layer) Crushed (Tochigi Kuzu produced) particle size: 10-16Mm spraying Temperature: room temperature (18 ° C.) application ^{rate: 1.8 (m 3 / 100m 2} ) binder (first layer ) Modified asphalt emulsion (trade name "Surfacesol H"
"Type", manufactured by Nichireki Co., Ltd.) Absolute viscosity of evaporation residue at 60 ° C .: 19500 poise Evaporation residue 67.5% by weight Penetration of evaporation residue 89 (1/10 mm) Softening point of evaporation residue 70 (° C.) ) Toughness of the evaporation residue at 25 ° C. 170 (kgf)
Cm) Tenacity of evaporation residue at 25 ° C 152 (kg)
f · cm) Viscosity at 20 ° C. 60 (centipoise) Spraying temperature: heating (70 ° C.) Spraying amount: 170 (l / 100 m ² ) Decomposition aid (first layer) “Cation DTA” (manufactured by NOF Corporation) Amount of decomposition aid used Evaporation residue of asphalt emulsion 1
0.5 parts by weight of active ingredient based on 00 parts by weight

[0152] Aggregate (second layer) Crushed (Tochigi Kuzu produced) particle size: 5-10 mm Scatter Temperature: room temperature (18 ° C.) application rate: ^1.0 (m 3/100 m ²⁾ binding material (second layer ) Modified asphalt emulsion (trade name "Surfacesol H"
"Type", manufactured by Nichireki Co., Ltd.) Absolute viscosity of evaporation residue at 60 ° C .: 19500 poise Evaporation residue 67.5% by weight Penetration of evaporation residue 89 (1/10 mm) Softening point of evaporation residue 70 (° C.) ) Toughness of the evaporation residue at 25 ° C. 170 (kgf)
Cm) Tenacity of evaporation residue at 25 ° C 152 (kg)
f · cm) Viscosity at 20 ° C. 60 (centipoise) Spraying temperature: heating (70 ° C.) Spraying amount: 150 (l / 100 m ² )

Aggregate (third layer) Artificial colored aggregate (red, trade name "Road Serum A1", manufactured by Chugai Ceramics Co., Ltd.) Particle size: 2-3.3 mm Spraying temperature: normal temperature (18 ° C.) Spraying amount: 0.4 ^(m 3/100 m ²⁾ binder (third layer) modified asphalt emulsion (trade name "surface tetrazole H
"Type", manufactured by Nichireki Co., Ltd.) Absolute viscosity of evaporation residue at 60 ° C .: 19500 poise Evaporation residue 67.5% by weight Penetration of evaporation residue 89 (1/10 mm) Softening point of evaporation residue 70 (° C.) ) Toughness of the evaporation residue at 25 ° C. 170 (kgf)
Cm) Tenacity of evaporation residue at 25 ° C 152 (kg)
f · cm) Viscosity at 20 ° C. 60 (centipoise) Spraying temperature: heating (70 ° C.) Spraying amount: 110 (l / 100 m ² )

Example 3 A functional multi-layer spraying type surface treatment method of the present invention was experimentally applied in the same manner as in Example 1 except that the following materials were used. There was unevenness due to damage to the existing road surface, but it was completely covered by the constructed surface treatment layer. The constructed surface treatment layer is uniform and reflects sunlight and vehicle headlights,
It was visible from afar, both day and night.
After a half-day curing period after the construction, an attempt was made to remove the aggregate grains at the driver's tip, but it was strongly bonded to the road surface. Further, when the vehicle was passed through a heavy load vehicle 30 times in a test, no scattering of the aggregate was observed.

[0155] Aggregate (first layer) glass bottle crushing sludge particle size: 2.5-5Mm spraying Temperature: room temperature (18 ° C.) application ^{rate: 0.5 (m 3 / 100m 2} ) binder (first layer) modified Quality asphalt emulsion (trade name "Surfacesol H"
"Type", manufactured by Nichireki Co., Ltd.) Absolute viscosity of evaporation residue at 60 ° C .: 19500 poise Evaporation residue 67.5% by weight Penetration of evaporation residue 89 (1/10 mm) Softening point of evaporation residue 70 (° C.) ) Toughness of the evaporation residue at 25 ° C. 170 (kgf)
Cm) Tenacity of evaporation residue at 25 ° C 152 (kg)
f · cm) Viscosity at 20 ° C. 60 (centipoise) Spraying temperature: heating (70 ° C.) Spraying amount: 90 (l / 100 m ² )

[0156] Aggregate (second layer) fluorescent pigmented glass beads particle size: 0.5-1 mm Scatter Temperature: room temperature (18 ° C.) application rate: ^0.4 (m 3/100 m ²⁾ binding material (second layer ) Modified asphalt emulsion (trade name "Surfacesol H"
"Type", manufactured by Nichireki Co., Ltd.) Absolute viscosity of evaporation residue at 60 ° C .: 19500 poise Evaporation residue 67.5% by weight Penetration of evaporation residue 89 (1/10 mm) Softening point of evaporation residue 70 (° C.) ) Toughness of the evaporation residue at 25 ° C. 170 (kgf)
Cm) Tenacity of evaporation residue at 25 ° C 152 (kg)
f · cm) Viscosity at 20 ° C. 60 (centipoise) Spraying temperature: heating (70 ° C.) Spraying amount: 90 (l / 100 m ² )

[0157]

As described above, according to the functional multi-layer spraying type surface treatment method of the present invention, a colored aggregate, a light reflective property, a brilliant property, a fluorescent property and / or a luminous property are provided on the uppermost layer. Because one or two or more functional aggregates selected from among the above aggregates, aggregates having an anti-freezing effect, and aggregates having elasticity are sprayed, the existing road surface is repaired. A surface treatment layer or a pavement having various functions can be easily and inexpensively constructed by simple operations. Further, since the binder or the binder or the evaporation residue in the binder having an absolute viscosity at 60 ° C. of about 15,000 poise or more is used, even if there is unevenness or inclination on the construction road surface, the dispersed binder is used. It is possible to construct a functional surface treatment layer that is uniform and has excellent durability without causing the material to flow indiscriminately and without excessive or insufficient binder depending on the location. Furthermore, by using aggregate whose particle size is regulated as the aggregate used for the lowermost layer, the binding between the road surface and the aggregate is increased, and a stable and durable functional surface treatment layer is constructed. Can be.

When a binder or a binder having a predetermined property in which the evaporation residue in the binder has predetermined characteristics is used as the binder, the adhesion of the aggregate to the road surface is increased, and the aggregate is strong and durable. A surface treatment layer can be constructed.
In particular, when using asphalt emulsion as the binder, there is no need to heat the binder, and it can be applied at room temperature, so that the work can be performed safely, and there is no generation of carbon dioxide gas. A surface treatment method can be realized. In addition, when a decomposition aid that promotes the decomposition is used together with the asphalt emulsion as a binder, the decomposition and solidification of the asphalt emulsion are accelerated, and a strong and durable stable surface treatment layer is formed in a shorter time. It is possible to build.

Also, simultaneously with or before or after the binder,
By spreading or spreading the fiber material, it is possible to construct a surface treatment layer that is excellent not only in durability but also in waterproofness. The functional multi-layer spraying type surface treatment method of the present invention, by using a specific work vehicle as disclosed in the present specification, the functionality with more uniformity, durability, and stability It is possible to build a surface treatment layer. The present invention exerts excellent effects not only on repairing an existing road surface but also on a newly-constructed road surface, and brings new possibilities to the technical field.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a spray type surface treatment method.

FIG. 2 is a diagram showing an example of a work vehicle used in the present invention.

FIG. 3 is a diagram showing another example of a work vehicle used in the present invention.

FIG. 4 is a view showing still another example of a working vehicle used in the present invention.

FIG. 5 is a view showing still another example of a working vehicle used in the present invention.

FIG. 6 is a view showing a state where an asphalt emulsion and a decomposition aid are sprayed one after another.

FIG. 7 is a front view showing an example of a binder dispersing device used in the present invention.

FIG. 8 is a plan view showing an example of a binder dispersing device used in the present invention.

FIG. 9 is a side view showing a positional relationship between a device for dispersing a binder and a device for dispersing a decomposition aid used in the present invention.

FIG. 10 is a plan view showing a positional relationship between a dispersing device for a binder and a dispersing device for a decomposition aid used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road surface 2a, 2b Binding material 3a, 3b Aggregate 4a, 4b Scattered aggregate 5 Work vehicle 6a, 6b Front wheel and rear wheel of work vehicle 7, 23 Spray nozzle 8 Aggregate bin 9 Carrying socket 10 Transport pump 11, 22 Spray bar 12 Aggregate transport vehicle 13 Aggregate spray width adjusting door 14 Aggregate discharge roll 15 Support arm 16 Push roller 17 Engine 18 Binder storage tank 19 Water tank 20 Mounting table 21 Primer tank 24 Work step 25 Heating device 26 Energy source 27 Aggregate hopper 28 Conveyor 29 Fiber material storage device 30 Fiber material 31 Nozzle 32 Short fiber 33 Sheet fiber material storage device 34 Sheet fiber material 35 Sending device 36 Pressing roller 37 Asphalt emulsion 38, 42 Decomposition assistant 39 Hardened Being layer 40 For decomposition aid Injection angle β mounting angle of the spray nozzle of the spray nozzle α spray nozzle for spray bar 41 decomposing aid

Claims (14)

[Claims] In a multi-layer spraying type surface treatment method in which a plurality of surface treatment layers are constructed on a road surface by repeating an operation of spraying a binder and spraying aggregate from at least two times, an uppermost layer is formed. The aggregate is selected from a colored aggregate, a light-reflective, brilliant, fluorescent, and / or luminous aggregate, an aggregate having an antifreezing effect, and an elastic aggregate. Functional multi-layer spray-type surface treatment method for spraying one or more kinds of functional aggregates. 2. The method according to claim 1, wherein the two or more functional aggregates are functional aggregates having different particle sizes and / or functions. 3. The method according to claim 1, wherein two or more kinds of functional aggregates having different particle sizes and / or functions are sprayed on the same layer and / or different layers. 4. When the minimum particle size of the aggregate used for the lowermost layer is less than 10 mm in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is the size of the sieve. If the nominal size of the opening is 2 mm or more and less than 5 mm, and if the minimum particle size is 10 mm or more, the difference between the minimum particle size and the maximum particle size is the size of the sieve. 4. The functional multi-layer spraying surface treatment method according to claim 1, wherein an aggregate having a nominal opening size of more than 3 mm and 6 mm or less is used. 5. The binder, wherein the binder or the evaporation residue in the binder has an absolute viscosity at 60 ° C. of about 15,000.
5. The method according to claim 1, wherein a binder is used.
The functional multi-layer spray type surface treatment method described in the above. 6. The method of claim 1, wherein the binder is a bituminous material.
The functional multi-layer spray type surface treatment method according to 3, 4 or 5. 7. The functional material according to claim 1, wherein the binder is a binder or a binder in which the evaporation residue in the binder has the following characteristics a) to d). Multi-layer spray type surface treatment method; a) Penetration of 50 to 150 (1/10 mm), b) Softening point of 50 to 120 ° C, c) Toughness at 25 ° C of 70 to 320 kgf · c
m, d) Tenacity at 25 ° C. is 30 to 300 kgf ·
cm. 8. The method according to claim 1, wherein the binder is an asphalt emulsion. 9. Asphalt emulsion as a binder at 20 ° C.
The viscosity at about 40 centipoise or greater.
The functional multi-layer spray type surface treatment method described in the above. 10. The functional multi-layer type spray according to claim 8, further comprising a step of spraying a decomposition aid which promotes the decomposition of the asphalt emulsion as a binder at the same time as or before or after the asphalt emulsion. Type surface treatment method. 11. The functional multi-layer spraying surface treatment method according to claim 1, wherein the fiber material is sprayed or spread at the same time as or before or after the binder. 12. An aggregate is scattered at a substantially constant time interval after the binder is scattered by using a work vehicle provided with at least a binder scatterer and an aggregate scatterer. 12. The functional multilayer type spraying type surface treatment method according to any one of items 11 to 12. 13. The functional multi-layer spraying type surface treatment method according to claim 1, which also serves as a repair method for an existing pavement. 14. A functional pavement constructed by the functional multi-layer spray type surface treatment method according to claim 1. Description: