JP2000170103A - Single layer spraying type surface treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single layer spraying type surface treatment method and a working vehicle capable of firmly and stably binding an aggregate on a road without using an excessive binder. SOLUTION: In a single layer spraying type surface treatment method for spraying a binder 2 on a road 1 and spraying an aggregate 3 thereon, in the case where the minimum particle diameter of the aggregate is not larger than 10 mm in the nominal size of the mesh of a sieve, the aggregate 3 in which a difference between the minimum particle diameter and the maximum particle diameter is larger than 2 mm and not larger than 5 mm in the nominal size of the mesh of the sieve is used. In the case where the minimum particle diameter of the aggregate is 10 mm or larger in the nominal size of the mesh of a sieve, the aggregate 3 in which a difference between the minimum particle diameter and the maximum particle diameter exceeds 3 mm and 6 mm or smaller in the nominal size of the mesh of the sieve is used. A working vehicle easily enabling 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 single-layer type spray-type surface treatment method, and more particularly, to the particle size and / or size of aggregate used.
Alternatively, the present invention relates to a single-layer spray-type surface treatment method capable of constructing a surface layer that is strong and has excellent durability and stability by regulating the viscosity of a binder.

[0002]

BACKGROUND OF THE INVENTION Road pavement has become
The aging and deterioration gradually progress, and the road surface may be worn to generate irregularities, and the pavement surface may have cracks or the like. If the irregularities and cracks are left, the safety of the passing vehicle may be threatened, and rainwater or the like may permeate through the cracks into the inside of the pavement and cause damage or destruction of the pavement itself.

Conventionally, as a method of repairing such aged and deteriorated road pavement, a spray surface treatment method, a mixed surface treatment method, and an overlay method have been proposed. In the spraying type surface treatment method, as shown in FIG. 1, for example, as shown in FIG. 1, a binder 2 made of bituminous material such as asphalt is sprayed on a road surface 1 on which aging or deterioration has occurred and unevenness or cracks have occurred. Subsequently, the operation of spraying the aggregate 3 thereon is repeated once or a plurality of times, and the aggregate 3 is bonded to the road surface 1 by the bonding material 2, and the bonding material 2 and the aggregate 3 are formed on the road surface 1. This is a method of constructing one or more layers.

[0004] This spray-type surface treatment method is relatively effective as a method for repairing aged and deteriorated pavement since the surface of the pavement can be repaired relatively easily. On the contrary, since the aggregate is merely bonded to the road surface by the binder, the aggregate dispersed on the binder by the scratching force or the impact force received from the tire of the passing vehicle, for example, is shown in FIG. In some cases, as shown by reference numeral 4 in FIG. If the aggregate 4 is scattered, the binding material directly appears on the surface of the road surface, so that the road surface flashes and becomes extremely slippery, causing slippage of passing vehicles and the like, which may cause a traffic accident. There was sex.

[0005] As an attempt to prevent such scattering of the aggregate, it is conceivable to increase the amount of the binder to be scattered and to firmly anchor the aggregate. However, when the amount of the binder made of bituminous material or the like increases, the amount of the binder increases. When the road surface temperature rises in summer or the like when sunlight is strong, a flash phenomenon occurs due to an excessive amount of the binder, which may result in a traffic obstacle.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and is intended to provide a solid and stable aggregate without using excessive binder. A single-layer spray-type surface treatment method that can be bonded to the road surface, and a durable and stable pavement constructed by such a treatment method, and furthermore, such treatment It is an object of the present invention to provide a work vehicle used for a construction method.

[0007]

Means for Solving the Problems The present inventors have studied a spraying surface treatment method, particularly a single-layer spraying surface treatment method in which only one layer of a binder and an aggregate is constructed on a road surface. As a result of repeating the above, by regulating the particle size of the aggregate to be used, it is possible to construct a single-layer spray-type surface treatment layer which is strong, durable and excellent in stability, and furthermore, a binder By spraying or spreading the fiber material at the same time or before or after the spraying, it is possible to construct a spray-type surface treatment layer having stronger durability or waterproofness, and a specific property as a binder. By using an asphalt emulsion having specific properties as a binder, and further using a decomposition aid as needed with the asphalt emulsion as a binder, Have found that it is possible to construct a spray-type surface treatment layer of the superior single-layer type, the present invention has been completed.

That is, according to the present invention, in a single-layer spraying type surface treatment method in which a binder is sprayed on a road surface and an aggregate is sprayed thereon, the minimum particle size of the aggregate is the nominal size of a sieve. In the case of less than 10 mm, 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, and the nominal size of the sieve is the minimum size. In the case of 10 mm or more, 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 a single layer type spraying type surface treatment method using an aggregate of 6 mm or less is provided. It is an object of the present invention to provide a pavement constructed by such a single-layer spraying surface treatment method.

Another object of the present invention is to solve the above-mentioned problems by providing a single-layer spraying surface treatment method for spraying or spreading a fibrous material simultaneously or before or after a binder. 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) a softening point of 50 to 120 ° C, c) Toughness at 25 ° C is 70 to 320 kgf · c
m, d) Tenacity at 25 ° C. is 30 to 300 kgf ·
The above-mentioned object is also achieved by providing a single-layer spraying type surface treatment method using a binder having the following formula: Asphalt emulsion, which can be applied at room temperature, is used as the binder, because heating is not required, there is little danger, and no carbon dioxide gas is generated. If used, the evaporation residue in the asphalt emulsion is
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.

[0010] The present invention further provides a pavement constructed by the above-described single-layer spraying type surface treatment method, and further includes a binder spraying device, an aggregate spraying device, and a fiber material spraying. Another object of the present invention is to provide a work vehicle provided with a spreader and, if necessary, a dispersing aid dispersing device near a binder dispersing device.

According to the present invention, since an aggregate whose grain size is regulated within a predetermined range is used, a single-layer spray-type surface treatment layer which is strong, durable, and excellent in stability is constructed. be able to. The binder or the evaporation residue in the binder has an absolute viscosity of about 150 at 60 ° C.
If you use more than 00 poise, even if you are sprinkling the binder on the road surface with severe unevenness and deformation,
Spreading binder does not flow along the slope of the road surface, and the thickness of the binder on the road surface does not become unevenly uneven,
A uniform and stable bonding force can be obtained. Here, the absolute viscosity is a value measured based on a viscosity test method described in “Pavement Test Method Handbook”, Japan Road Association, published on June 10, 1995, pages 398-402. .

In the present invention, when an asphalt emulsion is used as the binder, the viscosity at 20 ° C. is about 4%.
Desirably, it is 0 centipoise or more. When using an asphalt emulsion as a binder, if an asphalt emulsion having a viscosity at 20 ° C. of about 40 centipoise or more is used, even when a binder is sprayed on a road surface with severe irregularities and deformation, a surface treatment layer is constructed. A surface treatment layer having a uniform and stable bonding force can be constructed without the sprinkled binder flowing immediately along the road surface along the slope of the road surface so that the thickness of the binder on the road surface does not become uneven. be able to.
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 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.

When the asphalt emulsion is used as the binder in the single-layer spraying type surface treatment method of the present invention, and the decomposition aid is used, the asphalt emulsion and the decomposition aid as the binder are used together. It is sprayed on the road surface at or around the time. Spraying an asphalt emulsion and a decomposition aid on the road surface one after another means that either the asphalt emulsion or the decomposition aid is first sprayed on the construction site on the road surface, and then the decomposition aid or the asphalt emulsion is first applied. Means to spray from above.
As a result, the asphalt emulsion and the decomposition aid come into contact and come into contact on the road surface. Also,
Spraying the asphalt emulsion as a binder and the decomposition aid on the road at the same time means that the asphalt emulsion and the decomposition aid to be sprayed at the same construction site on the road are at least partially spread for both. Spraying overlapping, as a result of being sprayed at the same time, asphalt emulsion and decomposition aid reach the same place on the road at the same time and meet on the road, or meet in the air, contact and mix It will be. In addition, the road surface referred to in the present specification generally indicates a road surface on which the single-layer spraying type surface treatment method of the present invention is applied.

In the single-layer spraying type surface treatment method of the present invention, the asphalt emulsion as a binder and the decomposition aid are sprayed immediately before or after the same time. The agent is encountered on the road surface or in the air, contacts and mixes, and the action of the decomposition aid promotes the decomposition of the asphalt emulsion as a binder, thereby shortening the film formation time and hardening time using the asphalt emulsion. In the single-layer spraying type surface treatment method of the present invention, the asphalt emulsion as a binder and the decomposition aid may be sprayed one after another, or may be sprayed at the same time. From the viewpoint of shortening the curing time and constructing a surface treatment layer having excellent strength and durability, it is preferable to spray the asphalt emulsion and the decomposition aid at the same time, and furthermore, to spray at the same time. It is most preferable that the two collide in the air.

When the asphalt emulsion and the decomposition aid are sprayed at the same time as the binder and the two are collided in the air, the asphalt emulsion and the decomposition aid are sprayed using one or more spray nozzles respectively. Preferably, the asphalt emulsion sprayed from one 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. Furthermore, it is preferable that the injection density of the decomposition aid sprayed from each spray nozzle at the collision position with the asphalt emulsion is substantially uniform over the entire spread width at the collision position. This makes it possible to uniformly, at a controlled rate, collide, contact, and mix the asphalt emulsion as a binder with the decomposition aid, and to ascertain the time required to decompose and cure the asphalt emulsion as a binder. Is further shortened, and the durability and strength of the obtained surface treatment layer are also positively affected.

In the single-layer spraying type surface treatment method of the present invention, when the fiber material is sprayed or spread at the same time as the binder or before or after the binder, the fiber material and the binder are combined. Are mixed together, so that not only the aggregate can be more strongly bonded to the road surface, but also a spray-type surface treatment layer excellent in durability and waterproofness can be constructed.

In the single-layer spraying type surface treatment method of the present invention, it is desirable that the time from the application of the binder or the binder and the decomposition aid to the application of the aggregate is a relatively short fixed time interval. . The bonding material is that the temperature decreases or decomposition progresses immediately after being sprayed on the road surface,
If the time between the application of the binder and the application of the aggregate changes irregularly, the state of the binder at the time the aggregate is applied will also change irregularly, resulting in uniform and durable. An excellent 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. Examples of such a working vehicle include, for example, Japanese Patent Application No. 11-145614 and Japanese Patent Application No. 11-145 by the same applicant.
612, Japanese Patent Application No. 10-172107,
Japanese Patent Application No. Hei 10-172119 and Japanese Patent Application No. Hei 10-172119
A work vehicle as disclosed in the specification of US Pat. 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 single-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, a harbor facility, and a public hall. It can be applied to pavement such as plazas and wide sidewalks, and can be used not only for repair but also for construction of surface layer in new construction. Furthermore, an asphalt mixture, a cement mixture, and other pavement mixtures are paved on a pavement constructed by the single-layer spray-type surface treatment method of the present invention, and the single-layer spray-type surface treatment of the present invention. It is also possible to make the pavement constructed by the construction method function as a pressure layer and / or a buffer layer. As described above, the present invention provides a method for constructing a pavement including a step of laying a pavement mixture on a pavement constructed by the single-layer spraying type surface treatment method of the present invention, and a method for constructing the same. The pavement constructed by is also a target.

[0022]

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

First, the materials used will be described. <Binder> As the binder used in the single-layer spraying type surface treatment method of the present invention, asphalt, asphalt emulsion,
Examples include 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 per 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 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.

Examples of the cationic emulsifier usable in the present invention include aliphatic or alicyclic monoamines having long-chain alkyl groups, diamines, triamines, amidoamines.
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 alcohol acids, adducts of alkylene oxides such as aliphatics, aliphatic amines, aliphatic amides and ethanolamines. Is mentioned.

The dispersing agents and protective colloids used in asphalt emulsions 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-mentioned emulsified and dispersed bituminous material by adding one or more kinds selected from rubber and a thermoplastic polymer. It is desirable to use it as an asphalt emulsion.

The rubber and thermoplastic high molecular weight polymer used for the modification include natural rubber, backlash, 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 used as the binder of the present invention contains the modified asphalt emulsion as described above. These asphalt emulsions further include:
As the tackifier, a thermoplastic solid resin, a solid rubber, a liquid resin, a softener, a plasticizer, and the like can be added.
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. Also,
Antioxidants, antioxidants, sulfur and the like can also 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 asphalt to the rubber and thermoplastic polymer in the modified asphalt emulsion is preferably 2 to 20 parts by weight of rubber and thermoplastic polymer per 100 parts by weight of 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 the 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.

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 adhesiveness. A viscosity modifier and the like may be added.

The binder used in the single-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) needle The penetration is 50 to 150 (1/10 mm), b) the softening point is 50 to 120 ° C, and c) the toughness at 25 ° C is 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.

When the penetration of the binder or the evaporation residue in the binder is less than 50 (1/10 mm), the binder (when asphalt emulsion is used as the binder, asphalt after decomposition of the asphalt emulsion) 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 (or asphalt after 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 ° C. is less than 30 kgf · cm, when the asphalt emulsion is used as the binder, the asphalt after decomposition of the asphalt emulsion is used. 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”.

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.

<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 desirably used in the form of an aqueous solution, and its concentration is usually preferably in the range of 1.5 to 30 w / w%. 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 a 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, etc. 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 a 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-polymerizable anionic polymeric flocculants such as sodium alginate; cations such as water-soluble aniline resin hydrochloride, polythiourea acetate, polyethyleneaminotriazole, polybilylbenzyltrimethylammonium chloride and chitosan Nonionic polymer flocculants such as starch and water-soluble urea resin; amphoteric polymer flocculants such as gelatin, etc., 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 decomposition aid for anionic or nonionic asphalt emulsions described above is preferably used in the form of an aqueous solution, and the concentration thereof is usually 1.5 to 20.
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 proportion 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, artificial granulated aggregates, calcined foamed aggregates, artificial lightweight aggregates, ceramic particles, loxobites, aluminum particles, plastic particles, ceramics, emery, and the like can be used as similar granular materials.

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.

As the aggregate used in the present invention, colored aggregates having various colors can be used. For example, natural colored aggregates, artificially fired aggregates, and fired foamed aggregates can be used. Use of colored materials such as wood, artificial lightweight aggregate, ceramic particles, luxobite, aluminum particles, plastic particles, ceramics, emery, etc. makes it possible to easily realize strong, durable, and stable color pavement. Is possible. Further, one kind or two or more kinds of aggregates having different stone qualities, types and colors may be used in combination. In addition, these colored aggregates are usually used without a pre-coat, but when used by pre-coating, it is a matter of course to use a material which does not impair the colored properties inherent in the aggregates. is there. It is also possible to apply a coating with colored asphalt, a fluorescent paint or a luminous paint to a normal aggregate to use it as a colored aggregate, a fluorescent aggregate or a luminous aggregate.

As described later, the above aggregate has a minimum particle size of 10% in the nominal size of the sieve opening, as described later.
In the case of less than 2 mm, 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 mesh, and the minimum size is the nominal size of the sieve mesh. 10
In the case of not less than mm, the difference between the minimum particle size and the maximum particle size is desirably more than 3 mm and not more than 6 mm in the nominal size of the sieve opening. The "nominal size of the sieve opening" referred to in this specification is a nominal size that is commonly used when expressing a sieve, and is a standard size of a mesh sieve opening specified in JIS Z8801. Are in a correspondence relationship as shown in Table 1.

[0061]

[Table 1]

That is, in this 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 upper and lower limits of the particle size of the aggregate used in the present invention are not particularly limited as long as the above-mentioned condition of the particle size is satisfied.
As described above, those having a maximum particle size of 20 mm or less are preferable. 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.
Also, the spread thickness of the aggregate itself approaches the layer thickness of the binder spreading layer formed on the road surface by the spread binder,
In some cases, the spread thickness of the aggregate is smaller than the layer thickness of the binder, which is one of the causes of flash. On the other hand, if the maximum particle size exceeds 20 mm, not only does the traffic noise generated by the running of the vehicle increase, the road surface after construction becomes rough, but also the vehicle runs on the surface treatment layer, and the The material may be scattered, which is not preferable.

Further, only the aggregate may be further sprayed on the aggregate. Further, as the aggregate to be scattered, any kind of aggregate may be used as long as the above-described aggregate is used. Regarding the particle size, if the diameter is smaller than the aggregate to be scattered on the binder first. Although not particularly limited, fine-grained sand, medium-grained sand, coarse-grained sand, and aggregates having a small particle size of about No. 7 crushed stone having a particle size of 2.5 to 5 mm are usually used.

<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, waterproof performance, and preventing cracking. It is preferably about 70 mm.

Next, the single-layer spraying 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. Application rate of the binder is not particularly limited as long as the aggregate is coupled to the road surface, usually, 100 m ²
A range of 60 to 250 liters is preferred. 100m
^{If the} amount of binder per 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. Becomes 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 bone is placed on the dispersed binder.
Spray the wood. Spray amount of aggregate is 100m²0.4 per hit
~ 2.5m³Is preferable. 100m²Aggregate per hit
Spray amount of 0.4m³If it is less than the flash phenomenon
Cause, on the contrary, 100m ²2.5m of aggregate per hit
³When the vehicle exceeds
Not only hindered roads, but also difficult for pedestrians to walk
Surface. In addition, the amount of aggregate to be applied is
It is desirable to spray as much as possible. In addition, aggregate is usually
Sprayed at room temperature, but heated to 100-170 ° C
May be sprayed.

It is desirable that the above-described sprinkling of the binder and the sprinkling of the aggregate be carried out at fixed, short time intervals 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 a binder dispersing device and an aggregate dispersing device are both arranged before the work vehicle front wheels. 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 at any time to provide a spray nozzle for the decomposition aid in the vicinity of.

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 dispersion width adjusting door 13 and the aggregate transport roll 14 onto the binder as the aggregate 3. 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. 24 is a work step, 25 is a heating device for heating the road surface, and 26 is an energy source for the heating device 25. A spray nozzle for a decomposition aid can be provided at any time in the vicinity of the spray nozzle 7 for the binder.

FIG. 4 shows an example of a work vehicle in which the binder dispersing device and the aggregate dispersing device are both arranged behind the rear wheel of the work vehicle, and is the same as FIGS. 2 and 3. Have 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 (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 an aggregate popper 27 from an aggregate transport vehicle (not shown), transported to a transport conveyor 28, and scattered from the aggregate bin 8. In addition, it is possible to provide a spray nozzle for a decomposition aid near the spray nozzle 7 for the binder at any time.

When a two-pack type resin is used as the binder, a mixture of the two may be sprayed immediately before the 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 application of the aggregate, it is desirable to compact the application surface.
For example, tire rollers, iron wheels, etc.
Use self-propelled compactors such as rollers and vibrating rollers
be able to. Then, without sprinkling the binder,
Only the material may be sprayed. The aggregate used and the amount
For example, fine sand, medium sand, coarse sand and No. 7 crushed stone
(Fine particle size of 5 to 2.5 mm)
If 0.1 to 0.4 (m ³/ 100m²) Degree, scatter first
It can be spread on the laid aggregate. Finally
Lightly compact the spraying surface and float it with a road sweeper.
Remove stones and open to traffic.

In the single-layer spraying type surface treatment method of the present invention, the fiber material may be sprayed or spread at the same time as the spraying of the binder or before or after the spraying of the binder. good. 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 a storage device for a fiber material such as a monofilament, a multifilament, a spun yarn, a twisted yarn, etc. 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. In addition, the binder dispersing device, the aggregate dispersing device, and the fiber material dispersing or spreading device are all disposed in front of the work vehicle front wheel, or disposed between the work vehicle front wheel and the rear wheel. Of course, is also possible.

Although not shown in the figure, it is 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 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, the 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.

In a preferred embodiment of the single-layer spraying type surface treatment method of the present invention, when an asphalt emulsion is used as a binder, a decomposition aid is added to a road surface at the same time as or before or after the asphalt emulsion. Sprinkled on top. 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, and then the decomposition aid may be sprayed on the spray surface, or vice versa. Alternatively, after the decomposition aid is first sprayed on the road surface, the asphalt emulsion may be sprayed on the spray surface. Furthermore, after the asphalt emulsion and the decomposition aid are sprayed in this order, the asphalt emulsion may be sprayed again, or after the decomposition aid and the asphalt emulsion are sprayed in this order, again. A decomposition aid may be applied.

In any case, the asphalt emulsion and the decomposition aid are sprayed on the road surface one after another, so that the asphalt emulsion and the decomposition aid meet on the road surface and come into contact with each other to form the asphalt by the decomposition aid. The decomposition promoting action of the emulsion is started, and the asphalt emulsion is decomposed and hardened in a shorter time than when the asphalt emulsion alone is used. As described above, a preferred example of the single-layer type spraying 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 spraying 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, in the single-layer spraying type surface treatment method of the present invention, as described later, the asphalt emulsion and the decomposition aid are sprayed on the road at the same time, and the two are collided and contacted on the road. More preferably, the asphalt emulsion and the decomposition aid are sprayed at the same time, and the two are collided and brought into contact with each other in the air, so that the spraying is more robust, durable and more stable with a shorter curing time. It is capable of constructing a surface treatment layer.

The reason is considered as follows. That is, as an example in which the asphalt emulsion and the decomposition aid are sprayed on the road surface one after another, as shown in FIG. 6, for example, as shown in FIG. Considering the case where the auxiliary agent 38 is applied, a layer of the asphalt emulsion 37 and a layer of the decomposition auxiliary agent 38 are formed on the road surface 1 immediately after the application. The asphalt emulsion 37 and the decomposition aid 38 come into contact with each other at the interface of the two layers and mix with each other, and the decomposition promotion action of the asphalt emulsion 37 by the decomposition aid 38 is started. As a result, a layer 39 where the asphalt emulsion 37 is being decomposed and hardened is formed at the boundary between the layer of the asphalt emulsion 37 and the layer of the decomposition aid 38, and this layer 39 is formed. Conversely, undecomposed asphalt emulsion 3
Further contact and mixing of 7 with decomposition aid 38 are prevented, and furthermore the dissipation of water 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 they collide and come into contact with each other on the road surface, 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, in this case as well, it is preferable that the asphalt emulsion and the decomposition aid are scattered and brought into contact with each other in the air, rather than scattered and brought into contact with each other on the road surface at the same time. 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 collide and come into contact with each other on the road surface, a certain uniform mixing state can be realized. As soon as it reaches the point, 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, if the asphalt emulsion and the decomposition aid collide and come into contact with each other in the air, they are still in a state of motion even after the collision and contact, so that other asphalt emulsion particles and decomposition auxiliary It is thought that a very uniform mixing state is realized by repeating collision and contact with the agent particles or the combined particles of asphalt emulsion particles and decomposition aid particles.

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 further detail with reference to the drawings.

FIG. 7 is a view showing only a binder spraying apparatus used in the single-layer spraying type surface treatment method of the present invention, wherein 1 is a road surface, and 11 is a binder spraying apparatus. The spray bars 7-1, 7-2, 7-3,... Are spray nozzles attached to the spray bar 11 for dispersing the binder. Also, 37-1, 37-2, 37-3,
... are asphalt emulsions as binders ejected from the respective spray nozzles. Spray nozzle 7-
Any of the spray nozzles may be used as 1, 7-2, 7-3,..., For example, a spray nozzle having a circular full-surface spray pattern or a square full-surface spray pattern However, from the viewpoint of achieving uniform distribution, a spray nozzle having a flat spray pattern as shown in FIG. 7 may be used. Is desirable. 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 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. Preferably, it is in the range of 10 to 40 degrees, more preferably 15 to 35 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 the apparatus used in the single-layer spraying type surface treatment method of the present invention, a spraying apparatus for a decomposition aid is provided in addition to the above-described spraying apparatus for the binder. 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 shown in 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 decomposition aid collides 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.

The spray nozzle 41 for the decomposition auxiliary agent
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 loss on the road surface and loss of momentum is too short, and the uniformity is low. If the mixture is too high, the jetted asphalt emulsion and the decomposition aid both collide with each other in a state where they are still densely solidified. 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, the range is preferably 1 / 4H to 3 / 4H, and more preferably 2 / 4H to 3 / 4H.

As described above, the spray nozzles 7-1, 7-2, 7-3... For the 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.

Further, in one example of the apparatus used in the single-layer spraying type surface treatment method of the present invention, as shown in FIG.
Are the corresponding asphalt emulsions 37-1 and 37-1
, 37-3,..., Each collision position Y
1, Y2, Y3,... Are sprayed so that the spray density becomes uniform. That is, the decomposition aids 42-1 and 42-
., 42-3,..., In the plan view of FIG.
Asphalt emulsion 3 at an angle symmetrical with respect to the vertical planes Z1, Z2, Z3,...
Are injected toward 7-1, 37-2, 37-3,... Thereby, each of the collision positions Y1, Y2, Y3,
... Decomposition assistants 42-1, 42-2, 42- above
The injection densities of 3,... Correspond to the collision positions Y1, Y2, Y3,
.. Become uniform over the entire width direction, and more uniform mixing of the asphalt emulsion and the decomposition aid is realized.

In the above-described example, the decomposition aid is made to collide with the asphalt emulsion sprayed almost perpendicularly to the road surface at an angle. 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 injection 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 scattered surface treatment layer to be constructed, the adhesion described below was used. The property test was performed 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 metal plate is prepared for the number of aggregate samples, and asphalt emulsion (trade name “Surfacesol”, manufactured by Nichireki Co., Ltd.) is used as a binder. 1.15 kg / cm ^2, and for aggregate samples with a minimum particle size of 10 mm or more, apply 1.50 kg / cm ^2, and after applying various aggregate samples A load of 7 kgf / cm of linear pressure was applied, and a total of 30 rotation pressures were applied 15 times in opposite directions. After standing for a predetermined period of time, while holding the aggregate horizontally with the attached surface of the aggregate down, an iron ball having a diameter of 50 mm and a weight of 500 g was placed three times within 10 seconds from above.
Dropped to the center of the metal plate. 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 expressed as follows: adhesion rate (%) = ｛(9
0−ad) / 90 ° × 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.

[0105]

[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> Influence of the viscosity of the binder on the uniformity of the surface-treated layer In order to investigate the effect of the viscosity of the binder or the evaporation residue in the binder on the uniformity of the surface-treated layer, the evaporation residue was examined. 6 of
Binders having various values of absolute viscosity at 0 ° C. were prepared, and 1.2 (liter / liter) was placed on an experimental pavement having an uneven surface cut out from a rutted road surface for pavement replacement. m 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. 9 samples (liter / liter)
m ² ) was sprayed from above and lightly compacted, and then cured until the binder hardened. After curing, the experimental pavement was cut with a cutter, and the thickness of the binder at the bottom of the concave portion and at the top of the convex portion was measured. The results are shown in Table 3 together with the type of binder used.

[0108]

[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. of the evaporation residue in the binder was dispersed in the concave portion of the road surface by the action of gravity after spraying. At the top of the convex portion of the road surface, the thickness of the binder is as thin as about 1 mm or 1.5 mm, and conversely, at the bottom of the concave portion of the road surface,
A thick binder layer of about 4 mm to about 3.7 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, when the absolute viscosity at 60 ° C. of the evaporation residue in the binder becomes about 15,000 poise or more, the flow of the binder is suppressed, and the thickness of the binder layer at the bottom of the road surface concave portion and the top of the convex portion is reduced. Does not make 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. As described above, if the binder or the evaporation residue in the binder having an absolute viscosity of about 15,000 poise or more at 60 ° C. is used as the binder, the binder flows on the road surface even if the road surface has irregularities. It was found that a uniform surface treatment layer could be constructed without performing the above.

<Experiment 3> Influence of the characteristics of the binder or the evaporation residue in the binder on the bonding force to the road surface The characteristics of the binder or the evaporation residue in the binder are determined by the scattered surface treatment layer to be constructed. In order to examine the effect of the evaporation residue on the durability, 10 kinds of anionic asphalt emulsions having various properties as shown in Table 4 were prepared from the evaporation residue, and the adhesion test described below was carried out by the method of Vialit adhesion test. It went according to. 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, 10% w / w of alkyl diamine acetate (trade name "Cation DTA", manufactured by NOF Corporation)
An aqueous solution is prepared, and a weight ratio of (amount of active ingredient in aqueous solution of decomposition aid) / (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. Table 4 also shows the results.

[0113]

[Table 4]

As is apparent from Table 4, 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. The penetration is 50 (1/10 mm) or more, 150 (1/10 mm) or less, the softening point is 50 ° C. or more, 120 ° C. or less, and the 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. In addition, the penetration is 70 to 125 (1/10 mm),
Softening point 55-100 ° C, toughness 90-250kg
When the f.cm and the tenacity are in the range of 50 to 220 kgf.cm, a satisfactory result with an adhesion rate of 85% or more is obtained. Further, the penetration is 90 to 120 (1/10 mm), and the softening point is 60 to 80. ℃, toughness 100-200kgf ・ c
m and tenacities of asphalt emulsions D and E having a tenacity of 70 to 180 kgf · cm, a result of an adhesion rate of 90% or more was obtained. However, when Emulsion I had a softening point of 120 ° C., the asphalt component obtained by decomposing the asphalt emulsion became somewhat softer, the stiffness decreased somewhat, and the adhesion rate tended to decrease slightly. Further, the softening point becomes higher, the softening point of the evaporation residue in the asphalt emulsion is 150 ° C., the penetration is 40 (1/10 mm), the toughness is 360 kgf · cm, and the tenacity is 350 kgf · c.
In the asphalt emulsion J of m, the asphalt component obtained by decomposing the asphalt emulsion became soft, the stiffness 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 4> Effect of viscosity of asphalt emulsion as binder on uniformity of surface-treated layer In order to investigate the effect of viscosity of asphalt emulsion as binder on uniformity of the surface-treated layer, a test was conducted at 20 ° C. Prepare an anionic asphalt emulsion whose viscosity shows various values,
It was sprayed at a rate of 1.2 (liter / m ² ) on an experimental pavement having an uneven surface, which was cut out for pavement replacement from a rutted road surface. The difference between the concave portion and the convex portion was about 20 mm on average. Then, immediately, the same aggregates used in Experiment 3 were sprayed from above at a rate of 9 (liter / m ² ), lightly compacted, and then cured until the binder hardened. After curing, the experimental pavement was cut with a cutter, and the thickness of the binder at the bottom of the concave portion and at the top of the convex portion was measured. The results are shown in Table 5 together with the type of binder used.

[0116]

[Table 5]

As is clear from the results shown in Table 5, asphalt emulsions having a viscosity of 19 centipoise and 32 centipoise at 20 ° C. tend to flow into the recesses on the road surface due to the action of gravity after spraying, and stay there. At the top, the average thickness of the binder layer formed by the decomposition of the asphalt emulsion is about 0.7 mm or 0.8 mm
On the contrary, at the bottom of the concave portion of the road surface, on average, 1.5
mm or 1.2 mm thick binder material layer 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, 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 road surface concave portion 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. From the above, the viscosity at 20 ° C. of the asphalt emulsion was about 4
It was found that the use of a material having a density of 0 centipoise or more allows a binder to flow on the road surface even if the road surface has irregularities, thereby forming a uniform surface treatment layer.

<Experiment 5> Influence of the type of binder and the amount of decomposition aid used on the film formation time Anionic asphalt emulsion (trade name "Sampisol A", manufactured by Nichireki Co., Ltd.) as a binder, decomposition aid The same ones as used in Experiment 3 were used while varying 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 used binders are as follows. Anionic asphalt emulsion (trade name “Sanpysol A”, manufactured by Nichireki Co., Ltd.) Evaporation residue: 68 (%) Penetration of evaporation residue: 103 (1/10 mm) Softening point of evaporation residue: 65 (° C.) ) Toughness of the evaporation residue at 25 ° C .: 160 (kgf
Cm) Tenacity of the evaporation residue at 25 ° C .: 145 (kg
f · cm) Absolute viscosity of evaporation residue at 60 ° C .: 16000 (poise) Viscosity at 20 ° C .: 42 (centipoise) General-purpose asphalt emulsion for tack coat pk-4 (manufactured by Nichireki Co., Ltd.) Evaporation 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 6 shows the results. In Table 6, ○ indicates that film formation was observed, and X indicates that no film formation was observed.

[0122]

[Table 6]

As is evident from the results in Table 6, when the decomposition aid is used in an amount of 0.05% by weight or more based on 100 parts by weight of the evaporation residue of the anionic asphalt emulsion in terms of the amount of the active ingredient in the aqueous solution. 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 in which the evaporation residue satisfies the characteristics a) to d) defined in the present invention, compared to the conventional tack coat asphalt emulsion as a control, even when no decomposition aid is used, Decomposition and curing time were short.

<Experiment 6> Effect of Type of Decomposition Aid on Film Forming Time and Adhesion As the binder, the same anionic asphalt emulsion used in Experiment 5 (trade name "Sampisol A", Nichireki Co., Ltd.) ) And various types of decomposition aids were used.
Sprayed on a 30 cm × 30 cm × 5 cm asphalt concrete plate. After spraying, as in Experiment 5, at various curing times, it was observed whether or not the sprayed surface changed from brown to black and a decomposed film of asphalt emulsion was formed. 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 3, 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 affected the adhesion rate. 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 7 also shows the observation result of the presence or absence of film formation and the determination result of the adhesion rate.

[0126]

[Table 7]

As is clear from the results in Table 7, among the various decomposition aids tested, acetates of alkylamine surfactants such as alkylmonoamine acetate and alkyldiamine acetate, 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 carried out 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 dioctyl 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 .: 41 (centipoise)

<Experiment 7> Influence of Spraying Form of Binder and Decomposition Aid on Film Forming Time and Adhesion Rate The same anionic asphalt emulsion used in Experiment 5 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 6, 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. Note that 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 8 shows the results.

[0132]

[Table 8]

As is evident from the results in Table 8, the asphalt emulsion and the decomposition aid were used in the same manner as in (1) and (2), in which 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 sample in which the film formation was observed for a curing time of 30 minutes, a part of the film formation layer was 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 boundary between the asphalt emulsion and the decomposition aid formed a film, but moisture still remained on the road surface side portion of the decomposition aid. On the other hand, in the scattered samples (3) to (7), uniform film formation was observed.

The same test was carried out using a cationic asphalt emulsion (trade name “Sanpysol K”, manufactured by Nichireki Co., Ltd.), and 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, a work vehicle having a dispersing aid dispersing device provided in the vicinity of a dispersing device for a binder in a working vehicle as shown in FIG. The single-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 the position and angle of the spray nozzle for the decomposition aid are adjusted so that the decomposition aid collides with the binder at a position 30 cm from the road surface. did. Immediately after the binder and the dissolution aid were sprayed, the aggregate was sprayed, and then the roller was lightly rolled on the surface of the aggregate by a vibrating roller. There was a rut with a maximum depth of about 15 mm on the construction road surface, but a uniform surface treatment layer could be constructed without the binder flowing. After the construction, after a curing period of half a day, the vehicle was passed through a heavy-loading vehicle 30 times on a trial basis, and no scattering of aggregate was observed.

Aggregate used: crushed stone (produced by Kuzu, Tochigi Prefecture) Precoated with straight asphalt having a particle size of 5-8 mm and 0.5% by weight Spraying temperature Normal temperature (18 ° C.) Spraying amount 9 (l / m ² ) Binder used : Experimental modified asphalt emulsion C Absolute viscosity of evaporated residue at 60 ° C. 18000 poise Evaporated residue 68% by weight Penetration of evaporated residue 91 (1/10 mm) Softening point of evaporated residue 75 (° C.) Toughness at 25 ° C of 180 (kgf
Cm) Tenacity of the evaporation residue at 25 ° C 160 (kg)
f · cm) Viscosity at 25 ° C 65 (centipoise) Spraying temperature Heating (70 ° C) Spraying amount 1.1 (l / m ² ) Decomposition aid used: “Cation DTA” (manufactured by NOF CORPORATION) Amount of agent used Evaporation residue of asphalt emulsion 1
0.3 parts by weight of active ingredient based on 00 parts by weight

<Example 2> A test was conducted in the same manner as in Example 1 except that the following materials were used, the decomposition aid was not sprayed, and after the aggregate was sprayed, coarse sand was scattered. The single layer type spray type surface treatment method of the present invention was applied. Some cracks having a width of 5 mm or less existed on the construction road surface, but were completely covered by the constructed surface treatment layer. The constructed surface treatment layer is uniform, and 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.

Aggregate used: crushed stone (produced by Kuzu, Tochigi Prefecture) Pre-coated with straight asphalt having a particle size of 10-16 mm and 0.5% by weight Spraying temperature Heating (170 ° C) Spraying amount 15 (l / m ² ) Binder used : Heated asphalt (Gumphalt S-
SP, manufactured by Nichireki Co., Ltd.) 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 180 ° C. Spraying amount 1 .5 (l / m ² )

<Example 3> Using the following materials, and using the work vehicle shown in Fig. 5, the decomposition aid was not sprayed, and the fiber material was sprayed immediately after spraying the binder, except that In the same manner as in Example 1, the single-layer spray type surface treatment method of the present invention was experimentally applied. The constructed surface treatment layer was uniform, and after a half-day curing period after construction, an attempt was made to peel off the aggregate grains at the tip of the driver, 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.

Aggregate used: crushed stone (produced by Kuzu, Tochigi Prefecture) Precoated with straight asphalt having a particle size of 5-8 mm and 0.5% by weight Spraying temperature Normal temperature (18 ° C.) Spraying amount 10 (l / m ² ) Binder used : Heated asphalt (Gumphalt S-
SP, manufactured by Nichireki Co., Ltd.) 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 180 ° C. Spraying amount 1 0.4 (l / m ² ) Fiber material used: polyester fiber (100 denier, 48 filament manufactured by Toyobo Co., Ltd.) Fiber length 20 mm Spraying amount 90 (g / m ² )

<Comparative Example 1> As an aggregate, N shown in Table 2 was used.
o. In the same manner as in Example 1 except that the aggregate of No. 4 was used,
A surface treatment layer was constructed on the road surface adjacent to Example 1. No flow of the binder was observed, but after a half-day curing period after construction, the heavy-loading vehicle was passed 30 times on a test basis. I was scattered.

<Comparative Example 2> As the binder, N shown in Table 3 was used.
o. A surface treatment layer was constructed on a road surface adjacent to Example 1 in the same manner as in Example 1 except that the binder of Example 1 was used and no decomposition aid was used. The binder flowed into the rutted road surface, and a non-uniform surface treatment layer in which a portion of excess binder and a portion of insufficient binder were mixed was constructed. After a half-day curing period after the construction, the vehicle was passed through a heavy-loading vehicle 30 times on a test basis, and scattering of aggregate was found in a portion where the binder was insufficient.

<Comparative Example 3> N shown in Table 2 was used as an aggregate.
o. A surface treatment layer was constructed on the road surface adjacent to Example 2 in the same manner as in Example 2 except that 24 aggregates were used. No flow of the binder was observed, but after a half-day curing period after construction, the heavy-loading vehicle was passed 30 times on a test basis. I was scattered.

<Example 4> On the existing pavement having many linear cracks having a width of 5 mm or more, using the same working vehicle and the same material as in Example 1, the surface treatment layer was formed in the same manner as in Example 1. Was built. After a half-day curing period after assembling, an asphalt emulsion ("Catiosol CPE-4", manufactured by Nichireki Co., Ltd.) was applied as a tack coat on the constructed surface treatment layer with an engine sprayer at 0.5 (l / m ^2). ). Next, a dense particle asphalt mixture heated to 150 ° C. was laid on the tack coat to a thickness of 5 cm using an asphalt finisher. After the pavement, the pavement surface was subjected to primary rolling with a Macadam roller and secondary rolling with a tire roller, and then sufficiently finished and rolled with a Macadam roller again. The paved asphalt mixture was allowed to cool to room temperature, and then passed through a heavy-duty loading vehicle 50 times on the paved surface, but no change was observed on the paved surface of the fine-grained asphalt mixture on the top layer. Was. This indicates that the surface treatment layer constructed by the spray-type surface treatment method prevents cracks existing on the existing pavement surface from propagating to the uppermost layer of the pavement, and functions effectively as a pressure layer. It is.

<Comparative Example 4> A dense particle size asphalt mixture was formed on an existing pavement having many linear cracks having a width of 5 mm or more in the same manner as in Example 4 except that the surface treatment layer was not constructed. It was paved in the same manner as in Example 4. After the paved asphalt mixture was allowed to cool to room temperature, it was passed through a heavy-duty loading vehicle 50 times on the paved surface. , Was observed.

[0148]

As described above, the single-layer spraying type surface treatment method of the present invention uses an aggregate having a regulated particle size, so that the adhesion of the aggregate to the road surface increases, and the solidity increases. Thus, a stable surface treatment layer with high durability can be constructed.
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. The material does not flow indiscriminately, the binding material does not become excessive or insufficient depending on the location, and a uniform and excellent durability surface treatment layer can be constructed.

[0149] When a binder or a binder whose evaporation residue has predetermined characteristics is used as the binder, the adhesive force of the aggregate to the road surface increases, and the aggregate becomes stronger and more durable. A rich and stable surface treatment layer can be constructed. Furthermore, when asphalt emulsion is used as a binder, there is no need to heat the binder, and it can be installed at room temperature, so that work can be performed safely, and there is no generation of carbon dioxide gas and it is excellent in global environment. A spray-type 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.

Further, by spraying or spreading the fiber material at the same time as or before and after the binder, it is possible to construct a surface treatment layer which is excellent not only in durability but also in waterproofness. The single-layer spraying type surface treatment method of the present invention is a surface treatment layer constructed by using a specific work vehicle as disclosed in the present specification to further improve uniformity, durability and stability. As a result, it is a very useful and excellent invention together with the pavement of the present invention having the surface treatment layer to be constructed. Moreover, the single-layer spraying type surface treatment method of the present invention can realize color pavement extremely easily by selecting an aggregate to be used and using a colored one. The present invention not only repairs an existing road surface, but also exerts an excellent effect on a newly constructed road surface.In addition, a pavement body constructed by the spray type surface treatment method of the present invention has a pavement mixture further paved thereon. It can also function as a pressure layer and / or a buffer layer when doing so, which 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]

 Reference Signs List 1 road surface 2 binder 3 aggregate 4 scattered aggregate 5 work vehicle 6a, 6b front wheel and rear wheel of work vehicle 7,23 spray nozzle 8 aggregate bin 9 carry-in socket 10 transport pump 11,22 spray bar 12 aggregate transport Car 13 Aggregate dispersion width adjustment door 14 Aggregate discharge roll 15 Support arm 16 Push roller 17 Engine 18 Binder storage tank 19 Water tank 20 Placement table 21 Primer tank 24 Work step 25 Heating device 26 Energy source 27 Aggregate hopper 28 Transport 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 Feeding device 36 Pressing roller 37 Asphalt emulsion 38, 42 Decomposition auxiliary agent 39 Hardening layer 40 Decomposition aid Spray bar 41 for disintegration Injection angle β mounting angle of the spray nozzle of the spray nozzle α spray nozzle auxiliaries

Continuation of front page (72) Inventor Masaaki Kobashi 5-12-9-8 Shinoji Kita-ku, Sapporo-shi, Hokkaido No.8

Claims (16)

[Claims] In a single-layer spraying type surface treatment method in which a binder is sprayed on a road surface and an aggregate is sprayed thereon, a minimum particle size of the aggregate is less than 10 mm in a nominal size of a sieve opening. In the case, the difference between the minimum particle size and the maximum particle size is 2mm or more and less than 5mm in the nominal size of the sieve opening, and the minimum particle size is 10mm or more in the nominal size of the sieve opening. In this case, a single-layer spraying type surface treatment method using an aggregate having a difference between the minimum particle size and the maximum particle size exceeding 3 mm and 6 mm or less in the nominal size of the sieve opening. 2. The binder, wherein the binder or the evaporation residue in the binder has an absolute viscosity at 60 ° C. of about 15,000.
The single-layer spraying type surface treatment method according to claim 1, wherein a binding material of poise or more is used. 3. A single-layer scattered surface according to claim 1, wherein the binder is a binder or a binder whose evaporation residue in the binder has the following characteristics a) to d). Processing 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. 4. The method according to claim 1, wherein the binder is an asphalt emulsion. 5. An asphalt emulsion as a binder at 20 ° C.
The viscosity at about 40 centipoise or greater.
The single-layer spray-type surface treatment method described in the above. 6. The single-layer spraying type surface according to claim 4, 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. Processing method. 7. The single-layer spraying surface treatment method according to claim 1, wherein the fiber material is sprayed or spread simultaneously or before or after the binder. 8. The single-layer spraying surface treatment method according to claim 1, wherein after the aggregate is sprayed, an aggregate having a diameter smaller than that of the aggregate previously sprayed is sprayed. 9. The single-layer spray-type surface treatment method according to claim 1, wherein the aggregate is a colored aggregate. 10. An aggregate is sprayed 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. 9. The single-layer spray-type surface treatment method according to any one of 9. 11. A pavement constructed by the single-layer spray-type surface treatment method according to claim 1. Description: 12. A method for constructing a pavement, further comprising a step of laying a pavement mixture on the pavement constructed by the single-layer spraying type surface treatment method according to any one of claims 1 to 10. . 13. A pavement constructed by the method for constructing a pavement according to claim 12. 14. An apparatus for dispersing a binder, an apparatus for dispersing aggregates,
And a work vehicle equipped with a device for spreading or spreading a fiber material. 15. An apparatus for dispersing a binder, an apparatus for dispersing aggregates,
15. The work vehicle according to claim 14, wherein a device for spreading or spreading the fiber material is arranged so that a tire or a crawler of the work vehicle is not positioned therebetween. 16. The work vehicle according to claim 14, further comprising a device for spraying a decomposition aid near the device for spraying the binder.