JP3395130B2 - Spray type surface treatment method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray-type surface treatment method, and more particularly to a spray-type surface treatment method using a binder made of a cationic asphalt emulsion having specific properties.

[0002]

2. Description of the Related Art Road pavement is
There is a case where the road surface is gradually aged and deteriorated, the road surface is worn, unevenness is generated, and cracks are generated on the pavement surface. If the irregularities or cracks are left untreated, the safety of a passing vehicle may be threatened, or rainwater or the like may permeate into the inside of the pavement from the cracked portion and cause damage or destruction of the pavement itself.

Conventionally, as a method for repairing such aged and deteriorated road pavement, a spraying type surface treatment method, a mixed type surface treatment method, and an overlay method have been proposed. Among them, the spray-type surface treatment method is, for example, as shown in FIG. 1, a binder 2 made of a bituminous material such as asphalt is sprayed in a film shape on a road surface 1 that has been uneven or cracked due to aging or deterioration. Then, the operation of spraying the aggregate 3 on it is repeated once or a plurality of times to bond the aggregate 3 to the road surface 1 by the binder 2, and the binder 2 and the aggregate 3 are formed on the road surface 1. This is a method of constructing one layer, two layers, or more than three layers.

This spray-type surface treatment method is extremely effective as a method for repairing an aged or deteriorated pavement because the surface of the pavement can be repaired relatively easily, but a repair method using an asphalt mixture is On the contrary, since the aggregate is simply joined to the road surface by the binder, the aggregate scattered on the binder by the scratching force and the impact force received from the tires of the passing vehicle, for example, as shown in FIG. In some cases, as indicated by reference numeral 4, there was a phenomenon in which the particles were scattered. If the aggregate 4 scatters, the binder directly appears on the surface of the road surface, causing the road surface to flash and become extremely slippery, which may cause slipping of a passing vehicle and eventually cause a traffic accident. There was a nature.

As an attempt to prevent the scattering of such aggregates, it is possible to increase the amount of the binder to be sprinkled to firmly bond the aggregates. However, when the road surface temperature rises in the summer when the sun is strong, a flash phenomenon occurs due to the excessive presence of the binder, which may result in a traffic obstacle.

In recent years, from the viewpoint of suppressing the influence on the global environment, it has been attempted to use an asphalt emulsion which can be used without heating as a binder.
Asphalt emulsions generally decompose and harden slowly,
Since it is necessary to take a long curing time, the time until the opening of the traffic becomes long, which causes a traffic congestion.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and provides a strong and stable aggregate without the use of excess binder. It is possible to bond it on the road surface, and it can be installed at room temperature and has a short curing time. Furthermore, it is an object of the present invention to provide a work vehicle used for such a processing method.

[0008]

DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted a study on a spraying type surface treatment method, in particular, a binder, and as a result, have used a cationic asphalt emulsion having specific properties as a binder, and , By using a decomposition aid that accelerates the decomposition of the cationic asphalt emulsion, a spray-type surface treatment layer that is strong, durable and excellent in stability is constructed at room temperature and with a short curing time. The present invention has been completed by finding out that it is possible.

That is, the present invention has the following characteristics a) to d): a) The penetration of the evaporation residue is 50 to 150 (1/10 m).
m), b) the evaporation residue has a softening point of 50 to 120 ° C., and c) the evaporation residue has a toughness at 25 ° C. of 70 to 22.
0 kgf · cm, d) Tenacity of the evaporation residue at 25 ° C is 30 to 2
Application of a binder comprising a cationic asphalt emulsion having an amount of 00 kgf · cm, and a decomposition aid that promotes the decomposition of the binder at the same time or before or after, and a step of applying an aggregate. The above problem is solved by providing a surface treatment method.

The present invention also provides a pavement constructed by the spraying type surface treatment method as described above.
Or at least a spraying device of a binder having two or more spray nozzles and a spraying device of a decomposition aid having one or more spray nozzles, and a spray having one decomposition aid injected from one spray nozzle. A work vehicle in which one or more spray nozzles for injecting a binder and one or more spray nozzles for injecting a decomposition aid are arranged so as to collide in the air with a binder injected from a nozzle. The above problems are solved by providing them.

In addition to the characteristics a) to d) described above, the binder used in the present invention preferably has an absolute residue viscosity at 60 ° C. of about 15,000 poise or more. 60% of evaporation residue as a binder
If the absolute viscosity at ℃ is about 15,000 poise or more, even if the surface treatment layer is constructed by sprinkling the binder on the road surface where unevenness and deformation are severe, the sprinkled binder will change with time. It is possible to construct a surface treatment layer having a uniform and stable binding force without causing unevenness in the film thickness of the binder on the road surface due to flow along the slope of the road surface.

The binder used in the present invention is
It is desirable that the viscosity at 20 ° C. is about 40 centipoise or more. If a binder having a viscosity of about 40 centipoise or more at 20 ° C. is used as the binder, even if the binder is sprayed on the road surface where the unevenness or the deformation is severe, the sprayed binder can be sprayed. Immediately after that, there is no possibility that the film thickness of the binder on the road surface becomes non-uniform by flowing along the slope of the road surface, and a surface treatment layer having a uniform and stable bonding force can be constructed.

As the decomposition aid used in the present invention, any compound may be used as long as it can accelerate the decomposition of the cationic asphalt emulsion as a binder, an anionic emulsifier and an alkaline agent. Inorganic salt,
It is possible to use one or more kinds of decomposition auxiliary agents selected from the group consisting of anionic polymer flocculants, anionic asphalt emulsions, and anionic latexes, but if possible, alkylbenzene sulfonate,
It is desirable to use one or more anionic emulsifiers such as a metal salt of alkylmethyl tauric acid and a metal salt of di-octyl-sulfo-succinic acid. Among them, a metal salt of alkylbenzenesulfonic acid is most preferable.

In the spraying type surface treatment method of the present invention,
The binder and the decomposition aid are sprayed on the road surface at the same time or after each other. To spread the binder and the decomposition aid on the road surface one after the other means that either the binder or the decomposition aid is first sprayed on the construction site on the road surface, and then the decomposition aid or the binder is applied first. It means to spray from the top of what was sprayed on. As a result of being sprayed one after another, the binder and the decomposition aid meet and contact on the road surface. Further, spraying the binder and the decomposition aid on the road surface at the same time means that the binder and the decomposition aid to be sprayed on the same construction site on the road surface should be at least partially overlapped with each other. As a result of being sprayed at the same time, the binder and the decomposition aid reach the same place on the road surface at the same time and meet on the road surface, or meet in the air,
Contact and mix. The term "on the road surface" as used in the present specification refers to the road surface on which the spray-type surface treatment method is applied, when only one surface-treated layer is constructed by the spray-type surface treatment method of the present invention. Needless to say, when the surface treatment layer constructed by the spraying type surface treatment method is a multi-layer having two layers or three or more layers, it means the surface treatment layer constructed previously.

In the spraying type surface treatment method of the present invention,
Since the binder and the decomposition aid are sprayed before or after or at the same time, the sprinkled binder and the decomposition aid meet on the road surface or in the air, contact, mix, and by the action of the decomposition aid. The decomposition of the cationic asphalt emulsion, which is the binder, is accelerated, and the film-forming time and curing time by the binder are shortened. In the spray-type surface treatment method of the present invention,
Even if the binder and the decomposition aid are sprayed before or after, or
Although it may be sprayed at the same time, the binder and the decomposition aid are sprayed at the same time from the viewpoint of shortening the curing time of the binder and constructing a surface treatment layer with excellent strength and durability. Furthermore, it is most preferable to spray them at the same time and to collide them in the air.

When the binder and the decomposition aid are sprayed at the same time and both are collided in the air, the binder and the decomposition aid are sprayed using one or two or more spray nozzles, respectively. A binder injected from a spray nozzle and 1
It is preferable to collide with the decomposition auxiliary agent injected from the spray nozzle of 1) in the air. Further, it is desirable that the spread width at the collision position of the decomposition aid injected from each spray nozzle is substantially the same as the spread width at the collision position of the binder sprayed from the corresponding spray nozzle that is a collision partner. Furthermore, the injection density at the collision position of the decomposition aid injected from the individual spray nozzles with the binder is, in the entire spread width at the collision position,
It should be almost uniform. By doing so, it becomes possible to collide, contact, and mix the binder and the decomposition aid uniformly and at a controlled ratio, which further shortens the decomposition / curing time of the binder and also It also has a good effect on the durability and strength of the surface-treated layer.

In the spraying type surface treatment method of the present invention,
The time from the application of the binder and the decomposition aid to the application of the aggregate is preferably a relatively short fixed time interval. The binder is one whose decomposition progresses immediately after contact with the decomposition aid or immediately after being sprayed on the road surface.
When the time from the application of the binder and the decomposition aid to the application of the aggregate changes irregularly, the state of the binder at the time when the aggregate is applied also changes irregularly, and as a result,
A uniform and durable surface treatment layer cannot be obtained. In order to maintain a relatively short constant time interval between the application of the binder and the disintegration aid and the application of the aggregate, a binder applicator, a disassembly aid applicator and an aggregate applicator should be used. It is desirable to carry out construction using a work vehicle that is installed. As such a work vehicle, for example, Japanese Patent Application No. 10-
No. 158664, Japanese Patent Application No. 10-158665, No. 10-172107, No. 10
-172119 specification and Japanese Patent Application No. 10-1779
There is a work vehicle as disclosed in the specification of No. 86. In the work vehicle disclosed in these specifications, the spraying positions of various materials to be sprayed from the sprinkling device for the binder and the sprinkling device for the aggregate are all located in front of the front wheels of the work vehicle and between the front and rear wheels. ,
Alternatively, it is placed behind the rear wheel,
Since the binder and decomposition aid are sprayed on the road surface and the aggregate is immediately sprayed, the tires or crawlers of the work vehicle do not step on the sprayed binder and decomposition aid and they are once sprayed. There is no fear that the binder will peel off or adhere to the tire or the like to stain other road surfaces. Moreover, in the work vehicle as disclosed in the above specification, various spraying devices are mounted together on a single work vehicle, and the respective spraying operations are performed. It is possible to manage and install as a consistent work up to the dispersion of aggregate,
It is possible to build a stable surface treatment layer that is uniform and has high durability.

The spray-type surface treatment method of the present invention is not limited to general roads, but is also used for automobile roads, premises roads, park roads, walking paths, bicycle paths, sports fields, parking lots, airfields, port facilities,
It is also applied to pavements such as plazas attached to public halls and sidewalks with a wide width.It can be used not only for repair but also for construction of the surface layer in new construction. It is also optional to provide an overlay layer on the surface treatment layer constructed by the spraying surface treatment method of the present invention.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

First, the materials used will be described. <Binder> The binder used in the spray-type surface treatment method of the present invention is a cationic asphalt emulsion, and has the following characteristics a) to d): 50-150 (1 / 10m
m), b) the evaporation residue has a softening point of 50 to 120 ° C., and c) the evaporation residue has a toughness at 25 ° C. of 70 to 22.
0 kgf · cm, d) Tenacity of the evaporation residue at 25 ° C is 30 to 2
00 kgf · cm, and more preferably the following a ′) to
d '), that is, a') The penetration degree of the evaporation residue is 90 to 120 (1/10 m).
m), b ′) the softening point of the evaporation residue is 60 to 80 ° C., c ′) the toughness of the evaporation residue at 25 ° C. is 100 to 100 ° C.
200 kgf · cm 2, d ') The evaporation residue has a tenacity of 70 at 25 ° C.
˜180 kgf · cm.

Penetration of evaporation residue is 50 (1/10 m
If it is less than m), the asphalt after the decomposition of the asphalt emulsion becomes too hard, which is not preferable, and conversely, if the penetration exceeds 150 (1/10 mm), the asphalt after the decomposition of the asphalt emulsion becomes too soft. It is not desirable because it will end up.

When the softening point of the evaporation residue is less than 50 ° C., the asphalt after decomposition of the asphalt emulsion is apt to cause a flash phenomenon on a road surface under a high temperature such as in summer and tends to be sticky, which is not preferable. If it exceeds 120 ° C, the asphalt after the decomposition of the asphalt emulsion has insufficient flexibility, which is not preferable.

If the toughness of the evaporation residue at 25 ° C. is less than 70 kgf / cm, the asphalt after decomposition of the asphalt emulsion is not sufficiently viscous and the stiffness becomes too weak, which is not preferable, and conversely the toughness is 220 kgf / cm.
When it is more than cm, the asphalt after decomposition of the asphalt emulsion is too sticky and the stiffness becomes too strong, which is apt to be brittle against traffic load, which is not preferable.

Furthermore, if the evaporation residue has a tenacity of less than 30 kgf / cm at 25 ° C., the asphalt after decomposition of the asphalt emulsion will not be stretched, which is not preferable.
If it exceeds 5, the elongation of the asphalt after decomposition of the asphalt emulsion becomes too large, which is not preferable.

Here, the penetration and the softening point are JISK22.
The toughness and tenacity are defined in "Pavement Test Method Handbook", Japan Road Association, 1995.
"Toughness," pages 456-461, published June 10, 2014.
It is measured based on the "tenacity test method".

In addition to the above characteristics, the binder used in the present invention preferably has an absolute viscosity of the evaporation residue at 60 ° C. of about 15,000 poise or more. If the absolute viscosity of the evaporation residue at 60 ° C. is about 15,000 poise or more as the binder,
Even when the surface treatment layer is constructed by spraying the binder on the road surface that is highly uneven or deformed, the sprayed binder flows along the slope of the road with the passage of time and the binder on the road surface It is possible to construct a surface-treated layer having a uniform and stable binding force without causing the film thickness to be nonuniform. Here, the absolute viscosity is "Pavement Test Method Handbook", Japan Road Association, issued June 10, 1995, No. 398-402.
It is a value measured based on the viscosity test method described on the page.

Further, the binder used in the present invention is
It is desirable that the viscosity at 20 ° C. is about 40 centipoise or more. If a binder having a viscosity of about 40 centipoise or more at 20 ° C. is used as the binder, even if the binder is sprayed on the road surface where the unevenness or the deformation is severe, the sprayed binder can be sprayed. Immediately after that, there is no possibility that the film thickness of the binder on the road surface becomes non-uniform by flowing along the slope of the road surface, and a surface treatment layer having a uniform and stable bonding force can be constructed. Here, the viscosity is
Measured in accordance with the viscosity test method described in "Pavement Test Method Handbook Separate Volume (Provisional Test Method)", edited by Japan Road Association, Maruzen Co., Ltd., issued October 20, 1996, pp. 69-74. Value.

The cationic asphalt emulsion used as the binder in the present invention may be any cationic asphalt emulsion as long as it satisfies the characteristics a) to d) described above, such as lake asphalt. Natural asphalt, straight asphalt, blown asphalt, semi-blown asphalt, solvent deasphalting asphalt (for example, propane deasphalting asphalt) petroleum asphalt, artificial asphalt, heavy oil, tar,
One or a mixture of two or more such as pitch is used as a colloid mill, homogenizer, homomixer, etc. by using a cationic emulsifier and further adding a dispersant, a protective colloid, etc. It is emulsified in water by a suitable emulsifying machine. These asphalt emulsions are preferably modified asphalt emulsions as described below.

The artificial asphalt used in the cationic asphalt emulsion of the present invention is an artificially prepared binder, which can be used in the same manner as asphalt and is substantially colorless. is there. Here, "substantially colorless" means the properties such as color and light reflectivity, glitter, fluorescence, and light storage properties that the aggregate used in combination originally has, and pigments that are mixed if necessary. It is colorless to the extent that it does not impair the color, and does not necessarily have to be completely transparent, and may be semitransparent or have a slight amber color. When the artificial asphalt is emulsified into an artificial asphalt emulsion, it may be substantially colorless at the stage where reaction or decomposition of the artificial asphalt emulsion progresses to develop a predetermined strength as a binder, and for example, Even if it has a color such as white when it is emulsified with an emulsifier and exists as an artificial asphalt emulsion, it does not matter as long as it becomes substantially colorless at the stage of decomposing and developing the strength as a binder. .

The artificial asphalt used in the cationic asphalt emulsion of the present invention may be prepared by using any raw material. For example, a petroleum-based compounded oil and a petroleum resin may be used in a weight percentage. , Petroleum-based compounded oil: petroleum resin = (60 to 85%): (40 to 15%). If the proportion of the petroleum-based compounded oil is less than 60% by weight, the viscosity of the obtained binder will be too high and the workability will be reduced. On the other hand, when the proportion of the petroleum-based compounded oil exceeds 85% by weight, the viscosity is lowered but the adhesiveness and tackiness are lowered, which is not preferable. The artificial asphalt emulsion obtained by emulsifying the artificial asphalt obtained by such a compound is substantially colorless, and does not impair the original color tone of the aggregate even when used with a colored aggregate, for example. The color tone of is sufficiently exhibited.

The petroleum-based compounded oil used in the above-mentioned artificial asphalt is also called a process oil and has an aromatic carbon number of 35% or more of the total carbon number, and a naphthene ring carbon number of the total carbon number. There are 30 to 45% of naphthene type and paraffin type having paraffin side chain carbon number of 50% or more of the total carbon number. In the artificial asphalt used in the present invention, one or two of them can be used. At least one species is appropriately used.

As the petroleum resin used for the above-mentioned artificial asphalt, an aliphatic system (C5 system) containing as a main component a fraction (C5 fraction) having a boiling point of 20 to 60 ° C. which is separated by distillation of a naphtha decomposition product is used. ) Petroleum resin, similarly aromatic (C9 series) petroleum resin having a boiling point of 160 to 260 ° C. (C9 fraction) as a main component, which is separated by distillation of naphtha decomposition products, and these C5 series and C9 series Aliphatic / aromatic copolymerization system (C5 / C9 system) petroleum resin copolymerized with petroleum resin, and alicyclic having high purity dicyclopentadiene as a main component, which is separated mainly by distillation of decomposition products of naphtha There are group (DCPD) petroleum resins and the like, and in the artificial asphalt used in the present invention, one kind or a mixture of two or more kinds thereof is used.

In the present invention, a cationic type emulsifier is used as an emulsifier for emulsifying bituminous substances such as asphalt and artificial asphalt.

Examples of the cationic emulsifying agent which can be used in the present invention include aliphatic or alicyclic monoamines having a long chain alkyl group, hydrochlorides such as diamines, triamines and amidoamines, polyaminoethylimidazoline, long chain hydroxyalkyldiamines. Rosin amine, ethylene oxide adduct of these amines, amine oxide, or
Hydrochloric acid, sulfamic acid,
A water-soluble or water-dispersible salt treated with an acid such as acetic acid,
Further, quaternary ammonium salts of these amine-based surfactants and the like can be mentioned. Also, together with these surfactants, polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, oxyethylene
A nonionic surfactant such as an oxypropylene block copolymer can also be used in combination.

The dispersant and protective colloid used in the asphalt emulsion include sodium naphthalene sulfonate, casein, alginic acid, gelatin, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, sodium polyacrylate, lignin sulfonate, Examples include nitrohumates.

The cationic asphalt emulsion to be used as the binder of the present invention is one or two selected from rubber and thermoplastic polymer, in addition to the bituminous material such as asphalt or the like to be emulsified and dispersed or artificial asphalt. It is desirable to add more than one species and modify to use as a cationic modified asphalt emulsion. The term "cationic asphalt emulsion" as used herein includes a cationic modified asphalt emulsion.

The rubber and thermoplastic polymer used for the modification include natural rubber, gutta-vircha, 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, alfin rubber, styrene / butadiene block copolymer rubber, styrene / butadiene / Styrene copolymer rubber, styrene
Rubber such as isoprene block copolymer rubber, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyethylene, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, vinyl acetate / acrylate Examples of the thermoplastic polymer such as a copolymer. These rubbers or thermoplastic polymer compounds can be used alone or in combination of two or more. These rubbers and thermoplastic high molecular weight polymers are, for example, powdery, latex-like, emulsion-like and aqueous-like ones, and latex-like, emulsion-like and aqueous-like ones are mainly obtained by a post-mix type method. Although it is used exclusively for reforming, it may be used for reforming by a premix type method.

The blending ratio of the bituminous material such as asphalt or the artificial asphalt in the modified asphalt emulsion to the rubber and the thermoplastic polymer is 100 parts by weight of the bituminous material such as asphalt or the artificial asphalt. The amount of the plastic high molecular weight polymer is 2 to 20 parts by weight, preferably 3 to 7 parts by weight. If 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 gripping power to the aggregate after the modified asphalt emulsion is decomposed and cured On the other hand, when the amount of the rubber and the thermoplastic high molecular weight polymer exceeds 20 parts by weight, the cohesive force is too strong and peeling off from the aggregate occurs and the aggregate scatters. easy.

To the cationic asphalt emulsion used as the binder of the present invention, thermoplastic solid resin, solid rubber, liquid resin, softening agent, plasticizer and the like can be further added as a tackifier. . As the tackifier added, for example, rosin and its derivative, terpene resin, petroleum resin and its derivative, alkyd resin, alkylphenol resin, terpene phenol resin, coumarone indene resin, synthetic terpene resin, alkylene resin, polyisobutylene, 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 can be mentioned. Further, an antioxidant, an antioxidant, sulfur and the like can be added. Furthermore, for the purpose of adjusting the viscosity of the modified asphalt emulsion, MC, CM
It is also possible to add a water-soluble polymer protective colloid such as C, HEC, PVA, or gelatin.

The concentration of the evaporation residue (solid matter) in the cationic asphalt emulsion used as the binder in the present invention is usually preferably about 30 to 74% by weight, and particularly 5
More preferably, it is from 0 to 68% by weight. When the concentration of the evaporation residue is less than 30% by weight, it cannot be used, but it is difficult to obtain a viscoelasticity required as a binder, while when the concentration of the evaporation residue exceeds 74% by weight. , This is not to say that it cannot be used, but it tends to be difficult to secure good workability.

The cationic asphalt emulsion used in the present invention contains a UV absorber, various additives, for the purpose of improving heat resistance, preventing deterioration due to UV rays, improving workability, and improving adhesiveness. Viscosity modifiers, anti-stripping agents, binders, adhesion enhancers and the like may be added.

The asphalt in the cationic asphalt emulsion used in the present invention, especially the artificial asphalt, can be colored by appropriately adding an organic and / or inorganic pigment. For example, it is possible to further increase the lightness of the aggregate by using artificial asphalt colored in the same system as the aggregate used. Examples of the inorganic pigments used include the following pigments: white: titanium dioxide, zinc oxide, lead black and white colors: iron black, graphite, carbon black red: cadmium red orange: molybdenum orange yellow: second hydroxide Iron, yellow oxide, yellow lead green: chromium oxide, chrome green blue: ultramarine blue, navy blue, cobalt blue purple: manganese violet and the like.

Further, as the organic pigment, Red: Watching red, Quinacridone red Orange: Permanent orange Yellow: Fast Yellow Green: Phthalocyanine green Blue: Phthalocyanine blue Purple: dioxazine violet And so on.

These pigments may be used alone or in combination of two or more. The amount of these pigments used is 1 to 20 parts by weight, preferably 3 to 8 parts by weight, based on 100 parts by weight of asphalt such as artificial asphalt.

<Decomposition Auxiliary Agent> The decomposition auxiliary agent used in the present invention may be any one as long as it can accelerate the decomposition of the cationic asphalt emulsion used as the binder. It is possible to use one or more decomposition aids selected from the group consisting of anionic emulsifiers, alkaline inorganic salts, anionic polymer flocculants, anionic asphalt emulsions, and anionic latices.

Examples of usable anionic emulsifiers include carboxylate salts such as soaps; higher alcohol sulfuric acid ester salts, higher alcohol ether sulfuric acid ester salts such as higher alcohol ethoxylate sulfates, sulfated oils,
Sulfate esters such as sulfated fatty acid esters and sulfated olefins; alkylallyl sulfonates, α-
Olefin sulfonate, naphthalene sulfonate, formalin modified product of naphthalene sulfonate, lignin sulfonate, alkylbenzene sulfonate such as ammonium alkylbenzene sulfonate, sodium alkylbenzene sulfonate and potassium alkylbenzene sulfonate,
Sulfonate salts such as metal salts of di-octyl-sulfo-succinic acid such as di-octyl-sulfo-sodium succinate, and metal salts of alkyl-methyl-tauric acid such as sodium alkyl-methyl-taurate; phosphate ester salts Examples thereof include natural fatty acid salts such as synthetic fatty acid salts such as those based on sulfonates, sulfonate salts such as lignin, and carboxylate salts such as rosin and tall oil.

The alkaline inorganic salts that can be used include soda salts such as caustic soda, urea, ammonium bicarbonate,
Examples thereof include ammonium salts such as ammonium nitrate, ammonium aluminum sulfate, ammonium chloride, and ammonium phosphate. In addition, higher alcohols such as ethoxylate, alkaline lignic acid, alkaline salt of casein, and polyacrylic acid are also used as a decomposition aid in the present invention. it can.

One of the above decomposition aids is
Although it is possible to use one kind or two or more kinds,
Alkyl benzene sulfonate, such as sodium alkyl benzene sulfonate, ammonium alkyl benzene sulfonate, potassium alkyl benzene sulfonate, or sodium alkyl methyl taurate, di-octyl sulfo-succinate is used, but the curing speed is fast,
Moreover, it is preferable because a surface-treated layer having excellent strength and durability can be obtained. Further, among these, it is more preferable to use an alkylbenzene sulfonate such as sodium alkylbenzenesulfonate, ammonium alkylbenzenesulfonate, and potassium alkylbenzenesulfonate. ,
Among the alkylbenzene sulfonates, it is most preferable to use sodium alkylbenzene sulfonate.

It is desirable to use the above-mentioned decomposition aid in the state of an aqueous solution, and the concentration thereof is usually 1.5 to 3
The range of 0 w / w% is good. If the aqueous solution concentration of the decomposition aid is less than 1.5 w / w%, the effect of promoting the decomposition of the asphalt emulsion cannot be expected, and if the aqueous solution concentration of the decomposition aid exceeds 30 w / w%, the asphalt emulsion is decomposed. The speed becomes too fast, which will hinder the construction work.

In the present invention, the proportion of the decomposition aid which is brought into contact with and mixed with the cationic asphalt emulsion as the binder is 100% by weight of the evaporation residue in the cationic asphalt emulsion. The amount of the active ingredient in the aqueous solution is preferably 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 promoting the decomposition of the asphalt emulsion cannot be expected, and if it exceeds 4.0 parts by weight, the decomposition rate of the asphalt emulsion becomes too fast. It will interfere with the construction work.

<Aggregate> As the aggregate used in the present invention, any aggregate can be used as long as it is an aggregate for paving described in “Asphalt Pavement Guidelines” issued by the Japan Road Association. , For example, crushed stone, cobblestone, gravel, steel slag, and the like. Further, asphalt-coated aggregates obtained by coating these aggregates with asphalt or the above-mentioned artificial asphalt, and recycled aggregates can also be used. In addition, similar granular materials such as artificial fired aggregate, fired foam aggregate, artificial lightweight aggregate, ceramic grain, loxobite, aluminum grain, plastic grain, ceramics, emery, construction waste, and fiber can also be used. it can.

When the aggregate used in the present invention is coated with asphalt or artificial asphalt, the amount of asphalt or artificial asphalt required for coating is 0.1 to 1.5% by weight based on the aggregate. It is in the range of about%. In the case of porous aggregate such as steel slag,
The amount is larger in the above range, and for non-porous aggregate such as hard sandstone, the amount is smaller in the above range. Asphalt or artificial asphalt used for coating, asphalt as described above, asphalt emulsion, and modified asphalt obtained by modifying these with rubber or polymer, modified asphalt emulsion, and further artificial asphalt, modified Quality artificial asphalt, artificial asphalt emulsion, modified artificial asphalt emulsion, etc. are also used. In addition, aggregate spray-coated with kerosene or the like may be used.

As the aggregate used in the present invention, it is possible to use colored aggregates having various colors, and aggregates having light reflectivity, glittering property, and further fluorescent property or light storing property. Is, for example, natural colored aggregate, artificial fired aggregate,
Fired foam aggregates, artificial lightweight aggregates, ceramic grains, loxobite, aluminum grains, plastic grains, ceramics,
By using colored ones such as emery, it is possible to easily realize a strong, durable and stable color pavement. Also, glass beads, silicon carbide particles, fused alumina-based artificial aggregate, limestone-based artificial aggregate (for example, Synopal), orthoclase, quartz, aluminum silicofluoride, glass scrap such as glass bottle crushed pieces, fluorescent artificial aggregate By using an aggregate having a light-reflecting property, a glittering property, or a fluorescent property or a light-storing property, it becomes possible to easily realize a light-reflecting pavement, a glittering property or a light-emitting property pavement. Incidentally, these colored, light-reflecting, glittering, fluorescent or phosphorescent aggregates are usually used without precoating, but when used by precoating, these aggregates originally have It goes without saying that a material that does not impair the color property, the light reflectivity, the glitter property, the fluorescent property or the light storing property is used. It is also possible to coat a normal aggregate with colored asphalt, fluorescent paint or phosphorescent paint, and use it as colored aggregate, fluorescent aggregate or phosphorescent aggregate. In addition, one or more kinds of aggregates having different stone properties, kinds, color tones, and / or one or more kinds of aggregates having different functions may be used in combination, or a surface treatment layer to be constructed. Aggregates having different functions may be used for each.

Of the above aggregates, the aggregate used as the lowermost layer as the surface treatment layer is, from the viewpoint of constructing a uniform, strong and durable surface treatment layer,
The minimum particle size of the aggregate is 10 mm in the nominal size of the sieve opening.
In the case of less than, 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 openings,
Also, the minimum particle size is 10 mm in the nominal size of the sieve opening.
In the above cases, the difference between the minimum particle size and the maximum particle size is preferably more than 3 mm and 6 mm or less in the nominal size of the sieve openings. The "nominal size of the sieve opening" referred to in the present specification is a nominal dimension that is commonly used when the sieve is called, and is the standard size of the mesh sieve opening specified in JIS Z8801. And have a correspondence relationship as shown in Table 1.

[0055]

[Table 1]

That is, in this specification, the minimum particle size of the aggregate is less than 10 mm in the nominal size of the sieve openings, and the standard size of the mesh sieve openings specified by JIS Z8801 is 9. It means that it contains aggregate particles that pass through a 5 mm sieve, and the minimum particle diameter of the aggregate is 10 mm or more in the nominal size of the sieve openings, the aggregate is JIS Z88.
The standard size of the mesh sieve opening specified by 01 is 9.5 m.
It means that it does not contain aggregate particles that pass through the m sieve. If the difference between the minimum particle size and the maximum particle size is 2 mm or more in the nominal size of the sieve openings, and the minimum particle size is 5 mm in the nominal size of the sieve openings, the maximum particle size of the aggregate is For diameters, at least pass through a sieve with a nominal size of 2 mm or more than 5 mm, that is, a sieve with a nominal size of 7 mm, while not passing through a sieve with a nominal size of 6 mm. Meaning and also
If the difference between the minimum particle size and the maximum particle size is less than 5 mm in the nominal size of the sieve openings, the minimum particle size is 5 mm in the nominal size of the sieve openings. A sieve with a nominal size of less than 5 mm than 5 mm,
This means passing through a sieve with 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 opening, if the minimum particle size is 10 mm in the nominal size of the sieve opening, The largest particle size of the aggregate is at least a sieve with a nominal size of 3 mm larger than 10 mm, that is, a sieve with a nominal size of 13 mm that does not pass through a sieve with a nominal size of 13 mm, that is, with a nominal size of 16 mm. It means passing through a sieve.
It should be noted that here, whether to pass through the sieve or not to pass through is a judgment at a substantially common sense level, and a part such as dust may partially pass through the sieve or may be specific. Even if small grains remain on the sieve, if they are negligible to the aggregate aggregate, they shall not affect the decision not to pass through the sieve. In the present specification, unless otherwise specified, the particle size and particle size of the aggregate are based on the nominal size of the sieve openings.

The aggregate used in the lowermost layer as the surface treatment layer in the present invention is not particularly limited in the upper limit value and the lower limit value of the particle size as long as it satisfies the above particle size conditions. If possible, the minimum particle size is 5 mm or more, and the maximum particle size is 20 m.
It is preferably m or less. If the minimum particle size is less than 5 mm,
The particle size of the aggregate may be too small to effectively cover unevenness or cracks on the road surface. In addition, the spread thickness of the binder spread layer formed on the road surface by the spread binder is as close as possible to the spread thickness of the aggregate itself. However, the thickness becomes smaller, which is one of the causes of flash. On the other hand, when the maximum particle size exceeds 20 mm, the traffic noise generated by the running of the vehicle increases,
Not only is the road surface rough after construction, but also the aggregate may scatter when the vehicle runs on the surface treatment layer, which is not preferable.

The aggregate used in the layers other than the lowermost layer is not particularly limited in its grain size, but usually, the aggregate having a smaller diameter than the aggregate used in the layer below it is used. It is desirable to use, and fine aggregate such as fine sand, medium sand, and coarse sand, and No. 7 crushed stone having a grain size of 2.5 to 5 mm are also used in the uppermost layer.

The fine aggregate used in the present invention is 2.36 m.
What passes through the m sieve, for example, river sand, hill sand,
Mountain sand, screenings, crushed stone dust, silica sand,
Artificial aggregates, recycled aggregates, artificial fired aggregates, fired foam aggregates, artificial lightweight aggregates, ceramic particles, loxobite, synopearl, aluminum particles, plastic particles, ceramics, emery, rubber powder particles, cork powder particles, wood powder One kind or two or more kinds of particles, resin powder particles, pulp and the like can be used.

<Fiber Material> In the spraying type surface treatment method of the present invention, the following fiber materials can be used in order to make the surface treatment layer to be constructed stronger.
As the fiber material that can be used in the present invention, polyester,
Synthetic fibers such as polyamide, aromatic polyamide, polypropylene, vinylon, acrylic, and polyvinylidene chloride, or semi-synthetic fibers, natural fibers, glass fibers, recycled fibers, carbon fibers, metal fibers, and the like are used. , Polyester fibers are preferred.

These fibers can be used as short fibers cut to an appropriate length, but they can also be used as monofilaments, multifilaments in which a large number of monofilaments are bundled, spun yarns or twisted yarns. It is also possible to use it in the form of a sheet as a non-woven fabric, a woven fabric, or a knitted fabric.

The length of the short fibers is not particularly limited, but if the length is too short, the fibers of the surface treatment layer will not be effective in maintaining the strength, waterproofing performance, and preventing cracks. It is preferably about 70 mm.

When the fiber material as described above is sprayed or spread at the same time as the binder or the decomposition aid or before or after the binder or the decomposition aid, the fiber material and the binder are It becomes possible to construct a functional surface treatment layer which is not only mixed and more strongly bonds the aggregate to the road surface but also has excellent durability and waterproof property.

Next, the spraying type surface treatment method of the present invention will be described.

In the spraying type surface treatment method of the present invention,
The binder and the decomposition aid are sprayed on the road surface at the same time or after each other. When spraying the binder and the decomposition aid on the road surface before and after, the binder may be first sprayed on the road surface, and then the decomposition aid may be sprayed on the spray surface, or vice versa. Alternatively, the decomposition aid may be first sprayed on the road surface, and then the binder may be sprayed on the spray surface. Also,
Furthermore, the binder and the decomposition aid may be sprayed in this order and then the binder may be sprayed again. Alternatively, the decomposition aid and the binder may be sprayed in this order, and then the decomposition aid may be sprayed again. The agent may be sprayed.

In any case, as a result of the binder and the decomposition aid being sprinkled in succession on the road surface, the binder and the decomposition aid meet on the road surface and come into contact with each other to bond with the decomposition aid. The decomposition promoting action of the material is started, and the binder decomposes and hardens in a shorter time than when the binder alone is used. Thus, according to the spray-type surface treatment method of the present invention, since it includes the step of spraying the binder and the decomposition auxiliary agent on the road surface before and after, compared to the conventional spray-type surface treatment method, It is possible to construct a spray-type surface treatment layer which is strong, has high durability, and is excellent in stability in a shorter curing time.

However, in the spraying type surface treatment method of the present invention, as will be described later, the binder and the decomposition aid are sprayed on the road surface at the same time, and both are collided and brought into contact with each other on the road surface. More preferably, by spraying the binder and the decomposition aid at the same time, and by colliding and contacting them in the air, a spray-type surface treatment that is strong, durable, and stable with a shorter curing time. The layers can be built.

The reason for this is considered as follows. That is, as an example in which the binder and the decomposition aid are sprayed on the road surface in succession, for example, as shown in FIG. 2, the binder 2 is first sprayed on the road surface 1 and then decomposed on the spray surface. Considering the case of spraying the auxiliary agent 5, a layer of the binder 2 and a layer of the decomposition auxiliary agent 5 are formed on the road surface 1 immediately after the application. The binder 2 and the decomposition aid 5 are brought into contact with each other at the interface of both layers and mixed with each other, and the decomposition promoting action of the binder 2 by the decomposition aid 5 is started. As a result, at the boundary between the layer of the binder 2 and the layer of the decomposition aid 5, a layer 6 in which the binder 2 is being decomposed and hardened is formed. On the contrary, the result is that further contact and mixing between the undecomposed binder 2 and the decomposition aid 5 is prevented, and further, the dissipation of water from the layer of the binder 2 is prevented.
Therefore, it is considered difficult to sufficiently mix the binder 2 and the decomposition aid 5 in a short time. This is the same when the order of spraying the binder 2 and the decomposition aid 5 is reversed, and when the binder and the decomposition aid are sprayed on the road surface one after another, the decomposition aid Although the presence of the agent can shorten the curing time to some extent, the advantage of using the decomposition aid is not always fully utilized.

On the other hand, when the binder and the decomposition aid are sprayed at the same time so that they both collide and come into contact with each other on the road surface, more preferably in the air on the road surface, the binder material The mixing of the decomposition aid with the decomposition aid becomes more uniform and complete, and the advantages of using the decomposition aid can be fully utilized. However, even in this case, it is preferable that both the binder and the decomposition aid are sprayed at the same time so that both of them collide and come into contact with each other on the road surface in the air. The reason for this is considered as follows. That is, even when the binder and the decomposition aid are sprayed at the same time and both of them collide and come into contact with each other on the road surface, a certain uniform mixed state can be realized. As soon as it reaches, it loses its momentum and becomes stationary, so even if it is possible to realize a uniform mixed state of both, there is a limit to that. However, when the binder and the decomposition aid collide and contact in the air, both are still in a motion state even after the collision and contact. It is considered that an extremely uniform mixed state is realized by repeating collision and contact with the agent particles or the combined particles of the binder particles and the decomposition aid particles.

The case where the binder and the decomposition aid are brought into collision and contact in the air and the two are shockedly mixed and stirred will be described in more detail with reference to the drawings.

FIG. 3 is a view showing only the binder spraying device out of the binder and disintegration aid spraying devices used in the spraying type surface treatment method of the present invention, where 1 is the road surface. Yes, 7 is a spray bar for spraying the binder, 8-1,
Reference numerals 8-2, 8-3, ... Are spray nozzles attached to the spray bar 7 for spraying the binder. Also, 9
Reference numerals -1, 9-2, 9-3, ... Are binding materials jetted from the respective spray nozzles. Spray nozzle 8-
Any type of spray nozzle may be used as 1, 8-2, 8-3, ..., For example, a spray nozzle having a circular entire-surface type injection pattern or a quadrangular entire-surface type injection pattern. The spray nozzle may have a ring-shaped spray pattern or another spray pattern, but from the viewpoint of realizing uniform spraying, a spray nozzle having a flat spray pattern as shown in FIG. 3 is used. Is desirable. The flat injection pattern is an injection pattern that is ejected in a fan shape from the spray nozzle at a certain injection angle α and has a substantially linear cross-section with a long and narrow cross section perpendicular to the injection direction. The flat surface refers to the surface of a fan having a fan-shaped injection pattern.

FIG. 4 is a plan view of FIG. 3 seen from above, and as shown in FIG. 4, a flat spray nozzle 8 is provided.
-1, 8-2, 8-3, ... Normally, the flat surface of the spray pattern of the sprayed binders 9-1, 9-2, 9-3, ... It is arranged so as to have a certain angle β with the column direction. There is no particular limitation on the angle β,
It may be any number within a range of 0 to 90 degrees, but is usually 5 to 45 degrees, preferably 10 to 40 degrees from the viewpoint of canceling nonuniformity by overlapping the spray patterns from the spray nozzles. , And more preferably in the range of 15 to 35 degrees. The attachment angles β of the spray nozzles are preferably the same in one spray bar.

As shown in FIGS. 3 and 4, the sprayed bonding materials 9-1, 9-2, 9-3 from the spray nozzles 8-1, 8-2, 8-3, ... When viewed from the horizontal direction orthogonal to the longitudinal direction of the spray bar 7, the ... Are partially overlapped with each other. For example, in the case of FIG. 3 and FIG. 4, each injected bonding material 9-1, 9-2, 9-3, ...
* Overlap each other on the road surface 1/3. Such a spray bar 7 and spray nozzles 8-1, 8-
The binder spraying device consisting of 2, 8-3, ... Is usually mounted on a work vehicle and moves in the horizontal direction orthogonal to the longitudinal direction of the spray bar 7 with respect to the road surface 1 as the work vehicle advances. Therefore, when viewed from a certain point on the road surface 1, for example, the point A, the lower parts of the binders 9-4, 9-3, 9-2 sprayed from the spray nozzles 8-4, 8-3, 8-2 are sequentially ordered. Will pass through. Therefore, point A is to be sprayed three times, that is, three times. The number of overlapping sprays is not limited to triple, and may be double or quadruple or more. It is preferable to spray it. The multiple of this spray is the height from the road surface of the spray nozzle,
It goes without saying that the spray angle can be appropriately adjusted by adjusting the spray angle α from the spray nozzle, the interval between the spray nozzles, and the like.

In addition to the above-described binder spreading device, the device used in the spraying type surface treatment method of the present invention is provided with a disintegration aid spraying device. FIG. 5 is a side view showing a state in which a binder spraying device and a decomposition aid spraying device are provided side by side, and a spray bar 10 for the decomposition aid is shown.
Spray nozzle 11 for decomposition aid attached to
Has a bent tip and the sprayed decomposition aid 12
Are arranged so as to collide with the bonding material 9 sprayed from the spray nozzle 8 in the air.

FIG. 6 is a view of the apparatus of FIG. 5 seen from above. As shown in FIG. 6, in the apparatus used in the spraying type surface treatment method of the present invention, one spray nozzle for the binder is used. On the other hand, one decomposition assisting agent spray nozzle corresponds to, for example, the binding agent 9-1 sprayed from the binding agent spray nozzle 8-1 includes the decomposition assisting agent spray nozzle 11-. The decomposition auxiliary agent 12-1 injected from No. 1 collides in the air, and is injected from the decomposition auxiliary agent spray nozzle 11-2 to the bonding agent 9-2 injected from the binder spray nozzle 8-2. The decomposed auxiliary agent 12-2 collides in the air. Spray nozzles 8-1, 8-2, ... For the binder and the spray nozzles 11-1, 11-2, ... The correspondence between and is extremely strict, and the two correspond to each other in a one-to-one correspondence. For example, the decomposition auxiliary agent 12-2 sprayed from the spray nozzle 11-2 for the decomposition auxiliary agent corresponds to Only the binder 9-2 sprayed from the material spray nozzle 8-2 collides in the air, and does not collide with the binder sprayed from the other spray nozzles for the binder.

Spray nozzles 8-1, 8-for the binder, in which the injected binder or decomposition aid collides with each other in the air.
2, ... and a spray nozzle 11-1 for the decomposition aid,
Such one-to-one correspondence relationship between 11-2, ... Is realized as follows. For example, in FIG.
Taking the decomposition aid 12-1 sprayed from the spray nozzle 11-1 for the decomposition aid as an example, there is a correspondence between the sprayed decomposition aid 12-1 and the corresponding binding material 9-1. Although there is the binder 9-2 sprayed from the spray nozzle 8-2 for the binder that does not exist, the sprayed binder 9-2 is
For example, as shown in FIG. 3, since it has a fan-like shape with a widened hem, the sprayed decomposition aid 12-1 passes above the sloping hem-shaped shoulder part of the binding material 9-2 in the foreground. Then, they may collide with the binder 9-1. That is, in FIG. 3, when viewed from the horizontal direction orthogonal to the longitudinal direction of the spray bar 7, the horizontal direction is obtained from the intersection point x between the right shoulder of the injected bonding material 9-1 and the left shoulder of the injected bonding material 9-2. Although the line segment drawn in Fig. 3 is shown as a line segment X, the decomposition auxiliary agent 12-1 sprayed from the decomposition auxiliary agent spray nozzle 11-1 in FIG. Line segment at
By allowing passage at a higher position, the spray nozzle for the binder and the spray nozzle for the decomposition aid can be made to correspond one to one. The spray nozzles 8-1, 8-2, 8-3, ... For the binder and the spray nozzles for the decomposition aid so that the injected binder and the decomposition aid have such a positional relationship. 11-1, 11-2, 11
-3 ... And, by disposing, for example, the decomposition aid 12-3 sprayed from the spray nozzle 11-3 for the decomposition aid is combined with the spray nozzle 8-3 for the binder. Only the material 9-3 collides with the bonding material 9-2 or 9-4 sprayed from the spray nozzle 8-2 or 8-4 for the other adjacent bonding material.

The spray nozzle 11 for the decomposition auxiliary agent
Since the injection direction of the decomposition aid 12-1 from -1 is generally obliquely downward, the position where the decomposition aid 12-1 passes over the binding material 9-2 in front is slightly smaller than the line segment X. Even when the position is high, the binder 9-1 on the binder 9-1
The collision position between the decomposition aid 12-1 and the decomposition aid 12-1 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, the collision position between the binder 9-1 and the decomposition aid 12-1 on the binder 9-1 is determined from the viewpoint of the device design. , And slightly above the line segment X.

If the collision position Y between the binder and the decomposition aid is too low, the time from the collision of the binder and the decomposition aid to the drop on the road surface and loss of momentum is too short, resulting in a uniform However, if the mixing amount is too high, the injected binder and the decomposition aid will both collide in a thick and solid state, which is not preferable. Therefore, the height of the collision position Y is 1 / 4H to 3 /, where H is the height from the road surface 1 to the spray nozzle 8-1 for the binder.
The range of 4H is preferable, and more preferably 2 / 4H to 3
It is in the range of / 4H.

As described above, the spray nozzles 8-1, 8-2, 8-3 for the binder and the spray nozzles 11-1, 11-2, 11-3 for the decomposition auxiliary agent are ... -By making one-to-one correspondence between and, it becomes easy to control the collision rate such as the quantitative ratio of the binder and the decomposition aid that collide, the collision speed, the collision position, etc. Can be made to collide with each other at the optimum ratio and under the optimum collision condition. As a result, it is needless to say that an extremely uniform mixture of the two is realized and a shorter curing time can be realized.

Further, in the apparatus used in the spraying type surface treatment method of the present invention, as shown in FIG.
2-1, 12-2, 12-3, ... To the respective corresponding joint members 9-1, 9-2, 9-3, ..., Collision positions Y1, Y2, Y3. , ... are jetted so that the above jet density becomes uniform. That is, in the plan view of FIG. 6, the decomposition aids 12-1, 12-2, 12-3, ...
, 9-2, 9-3, ... With respect to the vertical planes Z1, Z2, Z3 ,. −
It is injected toward 2, 9-3, .... Accordingly, the injection densities of the decomposition aids 12-1, 12-2, 12-3, ... On the respective collision positions Y1, Y2, Y3 ,. ... is uniform over the entire width direction, and more uniform mixing of the binder and the decomposition aid is realized.

In the above example, the decomposition aid is made to collide obliquely with the binder injected almost perpendicularly to the road surface, but conversely, the decomposition aid is made perpendicular to the road surface. The binder may be jetted to collide with the decomposition aid obliquely, or both the binder and the decomposition aid may be jetted obliquely to collide. However, considering that the amount of binder is larger than that of the main material, as shown in the above-mentioned example, the decomposition aid is obliquely collided with the binder injected almost perpendicularly to the road surface. Preferably.

In the spraying type surface treatment method of the present invention,
It is desirable to use the decomposition aid in the form of an aqueous solution, and the concentration is usually in the range of 1.5 to 30 w / w%.
If the aqueous solution concentration of the decomposition aid is less than 1.5 w / w%, the effect of promoting the decomposition of the cationic asphalt emulsion as a binder cannot be expected, and the aqueous solution concentration of the decomposition aid exceeds 30 w / w%. If so, the decomposition rate of the cationic asphalt emulsion becomes too fast, which will hinder the construction work.

In the present invention, the proportion of the decomposition aid which is brought into contact with and mixed with the cationic asphalt emulsion as the binder is 100% by weight of the evaporation residue in the cationic asphalt emulsion. The amount of the active ingredient in the aqueous solution is preferably 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 promoting the decomposition of the asphalt emulsion cannot be expected, and if it exceeds 4.0 parts by weight, the decomposition rate of the asphalt emulsion becomes too fast. It will interfere with the construction work.

The injection pressure from each spray nozzle is
0.6 to 5.0 kgf / c for both binder and decomposition aid
The range of m ² is preferable, and preferably 1.0 to 2.5 kg
It is in the range of f / cm ² . Injection pressure is 0.6 kgf / c
When it is less than m ² , the injection pattern is difficult to form a good fan shape, and when the injection pressure exceeds 5 kgf / cm ² ,
The object to be ejected becomes mist, and it becomes difficult to form a good dispersion film on the road surface. The injection pressures of the binder and the decomposition aid may be the same, but it is desirable to set the injection pressure of the decomposition aid to be slightly higher than the injection pressure of the binder.

FIG. 7 shows a work vehicle used in the spraying type surface treatment method of the present invention. In FIG. 7, reference numeral 13 is a work vehicle, 14a and 14b are front wheels and rear wheels of the work vehicle 13, respectively. 7 is a spray bar for the binder, 8 is a spray nozzle for the binder, 10 is a spray bar for the decomposition aid,
Reference numeral 11 is a spray nozzle for a decomposition aid. Although only one spray nozzle 8 for the binder and one spray nozzle 11 for the decomposition aid are shown in FIG. 7, a plurality of spray nozzles 8 are provided in the width direction of the work vehicle. Reference numeral 15 is an aggregate bin as an aggregate spraying device. As the aggregate bottle, the above-mentioned Japanese Patent Application No. 10-158 filed by the same applicant is used.
664 specification, Japanese Patent Application No. 10-158665 specification,
Japanese Patent Application No. 10-172107, Japanese Patent Application No. 10-17
The one mounted on the work vehicle disclosed in the specification of No. 2119 and the specification of Japanese Patent Application No. 10-177986 is used. The binder is carried in from a supply vehicle (not shown) through a carry-in socket indicated by reference numeral 16, is pumped to the spray bar 7 for the binder by the transport pump 17, and is sprayed from the spray nozzle 8 toward the road surface. It is sprayed on the road surface 1. On the other hand, reference numeral 18 denotes a decomposition auxiliary agent tank, and the decomposition auxiliary agent is pressure-fed from the tank 18 to a spray bar 10 for the decomposition auxiliary agent by a transport pump (not shown), and sprayed from the spray nozzle 11 toward the binder 9. To be done. The spray nozzle 11 for the decomposition aid and the spray nozzle 8 for the binder are arranged so as to have a one-to-one correspondence, and the decomposition aid sprayed from one spray nozzle is one spray. It collides with the binder injected from the nozzle in the air, comes into contact with the binder, and shockly stirs and mixes. Further, the spray nozzle 11 for the decomposition aid and the spray nozzle 8 for the binder are arranged so that the injection density of the decomposition aid at the collision position is uniform over the entire width of the collision position. This is as described based on FIG. By adjusting the angle of the spray nozzle 11 for the disintegration aid with respect to the spray nozzle 8 for the binder, the binder and the disintegration aid collide on the road surface, or the disintegration aid is spread on the spray surface of the binder. It goes without saying that it can be sprayed. Further, the positional relationship between the spray bar 10 and the spray nozzle 11 for the decomposition aid and the spray bar 7 and the spray nozzle 8 for the binder is reversed, and the decomposer is sprayed first, and then the binder is sprayed. It is also possible to provide two or more sets of one or both of the spray bar 10 and the spray nozzle 11 for the decomposition aid and the spray bar 7 and the spray nozzle 8 for the binder. Is.

The aggregate is carried into the aggregate popper 19 from an aggregate transport vehicle (not shown) and is transported to the transport conveyor 20.
It is sprayed on the road surface 1 from the aggregate bin 15. In addition, 21
Is a push roller that pushes the rear wheel of an aggregate transport vehicle (not shown) located in front of the work vehicle 13. Further, 22 is a work step, and 23 is a heating device for heating the road surface.

In the spraying type surface treatment method of the present invention, the fibrous material may be spread or spread evenly at the same time as the spreading of the binder or before or after the spreading of the binder. In the work vehicle 13 of No. 7, in addition to the binder spraying device, the decomposition aid spraying device, and the aggregate spraying device, a fiber material spraying or leveling device is provided. That is, in FIG. 7, reference numeral 24 denotes a device for storing a fiber material such as a monofilament, a multifilament, a spun yarn, and a twisted yarn. It is supposed to be jetted. The short fiber 27 can also be stored together in the fiber material storage device 24, and the short fiber 27 is also jetted from the jet nozzle 26. In the illustrated example, the fibrous material is such that the binder and the decomposition aid are sprayed on the road surface 1 from the spray nozzle 8 and the spray nozzle 11, respectively. 8 and the spray nozzle 11 of the decomposition aid and the spray nozzle 26 of the fibrous material may be close to each other to spray the three simultaneously so that they are mixed with each other in the air.

Although not shown in the figure, a nozzle for injecting a fiber material such as monofilament, multifilament, spun yarn, or twisted yarn in the vehicle width direction of the work vehicle can be provided separately. By ejecting the fibrous material in the vehicle width direction of the work vehicle with the nozzles that are not provided and ejecting the fibrous material from the ejection nozzle 26 in parallel with the traveling direction of the work vehicle, the same or different kinds of fibrous materials are made to go straight to each other on the road surface. It is also possible to deposit in the direction.

On the other hand, reference numeral 28 indicates an accommodating device for a sheet-shaped fiber material 29 such as a non-woven fabric, a woven fabric, a knitted fabric, etc. The sheet-shaped fiber material is wound and held in a roll shape. The sheet-shaped fiber material is delivered by the delivery device 30 and spread on the road surface. Reference numeral 31 is a pressing roller that brings the fed sheet-shaped fiber material 29 into close contact with the road surface. The amount of fiber used is the basis weight, usually 25 g
/ M ² to 150 g / m ² , but preferably 5
It is 0 g / m ² to 120 g / m ² .

Thus, by spreading or laying the fibrous material at the same time as or before or after the binding material, the binding material and the fibrous material are mixed and impregnated with each other to firmly bond the aggregate. In addition to being excellent in durability and stability, the surface treatment layer is excellent in crack followability and waterproofness.

Next, the work procedure of the spraying type surface treatment method of the present invention will be described.

First, after cleaning the construction road surface with a load sweeper, a binder and a decomposition aid are sprinkled. As for the spraying of the binder and the decomposition aid, as described above, it is desirable to spray the both so as to collide them in the air. Water or a primer may be sprayed prior to spraying the binder and the decomposition aid. Water, for example, in the case of the present invention using a cationic asphalt emulsion as a binder, is sprayed as necessary to enhance the adhesion and familiarity between the cationic asphalt emulsion and the road surface, and in the summer It also has the effect of lowering the increased road surface temperature. On the other hand, the primer is also sprayed as necessary for the purpose of enhancing the adhesiveness and the compatibility between the binder and the road surface. The amount of the binder spread is not particularly limited as long as the aggregate is bonded to the road surface, but is usually 60 to 25 per 100 m ² per spray-type surface treatment layer.
A range of 0 liter is preferred. If the amount of the binder per 100 m ² is less than 60 liters, the bond strength and the adhesive strength between the road surface and the aggregate and between the aggregate and the aggregate may be insufficient.
If it exceeds 50 liters, it may cause a flash phenomenon. Further, the amount of the binder applied varies depending on the particle size of the aggregate, and generally, the amount of the binder applied per layer increases as the aggregate having a larger particle size is used.

After the binder and the decomposition aid are sprayed, the aggregate is further sprayed on the mixed layer of the binder and the decomposition aid that has been sprayed. The amount of aggregate to be dispersed is usually preferably in the range of 0.4 to 2.5 m ³ per 100 m ² per spray type surface treatment layer. If the amount of aggregate dispersed per 100 m ² is less than 0.4 m ^3, it may cause a flash phenomenon, and conversely 100 m 2
^{When the} amount of aggregate per ² exceeds 2.5 m ³ , not only the excess aggregate becomes a floating stone to prevent a vehicle from passing but also the road surface is difficult for a pedestrian to walk. Further, it is desirable that the amount of the aggregate to be dispersed is increased as the aggregate has a larger particle size. The aggregate is usually sprayed at room temperature,
You may make it spray in the state heated at -170 degreeC.

In the case of constructing only one spreading type surface treatment layer, subsequently, the spreading surface of the aggregate is compressed. As the roller compactor, for example, a self-propelled roller compactor such as a tire roller, an iron wheel roller, or a vibration roller can be used.

When the spreading type surface treatment layer is constructed in two or more layers, the binder and the decomposition aid are further spread on the spreading surface of the aggregate of the first layer, and then the aggregate is spread. It suffices to repeat the process as many times as necessary. The aggregate dispersed in the upper layer, it is preferable to use those having a smaller particle size than those dispersed in the lower layer, and accordingly, the binder to be dispersed,
It is desirable to reduce the amount of the decomposition aid and the aggregate to be dispersed in the upper layer. When constructing the uppermost layer, colored pavement can be easily realized by using colored aggregates. Further, by using a light-reflecting, glittering or fluorescent aggregate, a light-reflecting pavement or a fluorescent pavement can be easily constructed.

When the spray-type surface treatment layer is constructed in a multilayer structure of two or more layers, the fiber material may be sprayed at the same time as or before or after the binder and the decomposition aid at the time of constructing an appropriate layer, if necessary. It is good, but in the case of constructing a surface-treated layer having no particular problems in crack followability and waterproofness, it may be used only when constructing the lowermost layer.

When the spray type surface treatment layer is constructed in two or more layers, the finishing is performed by rolling the spread surface of the aggregate for each layer. For rolling, a self-propelled rolling machine such as a tire roller, an iron wheel roller, or a vibration roller can be used as in the case of constructing only one spreading type surface treatment layer. Only the top layer may be sprinkled with the aggregate without sprinkling the binder. Speaking of the aggregate used and the amount of its dispersion, for example, fine-grained sand, medium-grained sand, coarse-grained sand or fine aggregate such as No. 7 crushed stone (particle size 5 to 2.5 mm) is thin, for example, 0.1 to 0.4 (m ³ / 100m ² )
To some extent, it may be sprinkled on the aggregate that has been previously sprayed. Finally, lightly compact the spray surface and remove the floating stones by the road sweeper to open it to traffic. In addition, on the surface-treated layer constructed by the spray-type surface treatment method of the present invention, spread an asphalt mixture and the like, and use the surface-treated layer constructed by the spray-type surface treatment method of the present invention as a decubitus layer. You can

Hereinafter, the present invention will be described in more detail with reference to experimental examples.

<Experiment 1> Influence of the characteristics of the binder on the bonding strength with the road surface In order to investigate the influence of the characteristics of the binder used on the durability of the dispersion type surface treatment layer to be constructed, it is shown in Table 2. Seven kinds of cationic asphalt emulsions having various characteristics as described above were prepared, and the adhesion test described below was carried out by viarit
ialit) Adhesion test was performed according to the method. As the aggregate, an aggregate sample having a minimum particle size of 5 mm and a maximum particle size of 8 mm was prepared, which was dried and allowed to stand under the conditions specified in the viarit adhesion test method. On the other hand, as a decomposition aid, sodium alkylbenzene sulfonate (trade name "NeoPerex",
A 5 w / w% aqueous solution (manufactured by Kao Co., Ltd.) was prepared, and the weight ratio was (amount of active ingredient in aqueous solution of decomposition aid) / (evaporation residue in asphalt emulsion) = 3.0 / 100.

On the other hand, the thickness is 2 mm and the size is 200 × 200.
While preparing the same number of mm metal plates as the number of samples, each of the above 7 kinds of cationic asphalt emulsion prepared separately as a binder and the above decomposition aid are collided in the air using a flat spray nozzle. , 1.1 (liter / m ² ) was sprayed. In addition, the spreading height H of the binder
Is 50 cm, and the collision position between the binder and the decomposition aid is 30 cm from the spray surface, that is, (3/5) H. Then, 9 per metal plate was placed on the surface of the binder and decomposition aid.
After spraying 0 grain of the above-mentioned aggregate, a load of a linear pressure of 7 kgf / cm was applied, and a total of 30 rotations were applied 15 times in opposite directions. After allowing it to stand for 6 hours, while keeping it horizontally with the adhesion surface of the aggregate facing downward, an iron ball with a diameter of 50 mm and a weight of 500 g was placed on the center of the metal plate three times within 10 seconds. I dropped it. Of the aggregate particles peeled off from the metal plate by the dropping of the iron ball, the number of aggregate particles to which the binder was not attached was counted and defined as a. Further, the aggregate remaining on the metal plate was peeled off by hand, and the number of aggregate particles to which the binder was not attached was counted to be d. Adhesion rate (%) is the adhesion rate (%) = {(90
-Ad) / 90} × 100. Each sample was tested three times, and the results were averaged, and an adhesion rate of 80% or more was evaluated as satisfactory. In addition, the same procedure except that the decomposition aid is not sprayed,
Samples were prepared by sprinkling aggregates on 7 types of cationic asphalt emulsions and tested in the same manner to determine the adhesion rate. The results are shown in Table 2.

[0101]

[Table 2]

As is clear from Table 2, when the binder and the decomposition aid were made to collide in air, the physical properties of the cationic asphalt emulsion as the binder were such that the penetration of the evaporation residue was 150 ( 1/10 mm) or less, the softening point of the evaporation residue is 50 ° C. or more, the toughness of the evaporation residue at 25 ° C. is 70 kgf · cm or more, the tenacity of the evaporation residue at 25 ° C. is 30 kgf · cm or more, and the adhesion rate is 80%. The above satisfactory results have been obtained. Also, the penetration is 90 to 1
20 (1/10 mm), softening point 60 to 80 ° C, toughness 100 to 200 kgf · cm, tenacity 70 to
Satisfactory results with an adhesion rate of 90% or more were obtained with 180 kgf · cm of cationic asphalt emulsions D and E, but when the softening point of Emulsion F was 120 ° C. or more, the asphalt content obtained by decomposition of the asphalt emulsion was obtained. Was slightly softer, the waist was somewhat reduced, and the adhesion rate tended to be slightly decreased. Further, the softening point becomes higher, the softening point is 150 ° C, the penetration is 20 (1/10 m
m), toughness 250 kgf · cm, tenacity 2
The 20 kgf · cm cationic asphalt emulsion G is
The asphalt content obtained by decomposing the asphalt emulsion became softer and the waist became weaker, and the adhesion rate was further reduced. On the other hand, almost the same result was obtained when the decomposition aid was not used, but the adhesion rate was lower than that when the decomposition aid was used as a whole.

<Experiment 2> Effect of Binder Viscosity on Uniformity of Surface Treatment Layer In order to investigate the effect of binder viscosity on surface treatment layer uniformity, a cation whose viscosity at 20 ° C. shows various values. A system asphalt emulsion was prepared and sprayed at a rate of 1.2 (liter / m ² ) on an experimental pavement having a roughened surface, which was cut out from the road surface where ruts were dug for pavement replacement. The difference between the concave portion and the convex portion was about 20 mm on average. Then, immediately, the same aggregate used in Experiment 1 was sprayed from above at a rate of 9 (liter / m ² ), lightly rolled, 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 the top of the convex portion was measured. The results are shown in Table 3 together with the type of binder used.

[0104]

[Table 3]

As is clear from the results shown in Table 3, the binders having viscosities of 21 centipoise and 29 centipoise at 20 ° C. tend to flow into the recesses of the road surface due to the action of gravity after spraying, and to stay in the recesses of the road surface. The average thickness of the binder is 0.65 mm or 0.78 mm at the top of the
On the contrary, on the contrary, at the bottom of the concave portion of the road surface, the average is 1.3
A binder layer as thick as 1 mm or 1.15 mm was formed. The aggregate particles in the convex portion were relatively easily peeled off when an attempt was made to peel them off with the tip of a spatula. Further, in the concave portion, the amount of the binder is too large, and if it is left as it is, there is a risk of causing a flash phenomenon when the vehicle is actually used.

On the other hand, when the viscosity at 20 ° C. is about 40 centipoise or more, the flow of the binder is suppressed, and there is not much difference in the thickness of the binder layer between the bottom of the road surface concave portion and the top of the convex portion. Attempts were made to peel off the aggregate particles in the projections and recesses with the tip of the spatula, but they were so tightly bonded that they could not be easily removed. From the above, if a binder having a viscosity of about 40 centipoise or more at 20 ° C. is used as the binder, even if the road surface has irregularities, the binder does not flow on the road surface and a uniform surface treatment layer can be constructed. I understood.

<Experiment 3> Effect of viscosity of evaporation residue in binder on uniformity of surface treatment layer To investigate the effect of viscosity of evaporation residue in binder on uniformity of surface treatment layer, 60 Binders with various absolute viscosities at ℃ were prepared, and 1.2 (l / m ² ) was sprayed. The viscosity of the binder itself at 20 ° C. was about 40 centipoise, and the difference between the concave portion and the convex portion on the experimental pavement was about 20 mm on average. Immediately thereafter, the same aggregate used in Experiment 1 was sprayed from above at a rate of 9 (liter / m ² ), lightly pressed and then cured for 3 months. After curing, the experimental pavement was cut with a cutter, and the thickness of the binder at the bottom of the concave portion and the top of the convex portion was measured. The results are shown in Table 4 together with the type of binder used.

[0108]

[Table 4]

As is clear from the results shown in Table 4, the binders having absolute viscosities of about 8,000 poises and about 13,000 poises at 60 ° C. gradually spread with the lapse of time due to the action of gravity after being sprayed, and then spread in the recesses of the road surface. There is a tendency to stay, and the thickness of the binder is 0.67 mm at the top of the bumps on the road surface.
Or 0.80 mm, and conversely, a thick binder layer of 1.35 mm or 1.20 mm was formed at the bottom of the recess of the road surface. The aggregate particles in the convex portion were relatively easily peeled off when an attempt was made to peel them off with the tip of a spatula. Further, in the concave portion, the amount of the binder is too large, and if it is left as it is, there is a risk of causing a flash phenomenon when the vehicle is actually used.

On the other hand, the absolute viscosity at 60 ° C. is about 150.
When it is more than 00 poise, the flow of the binder is suppressed, and there is not much difference in the thickness of the binder layer at the bottom of the road surface concave portion and the top of the convex portion. Attempts were made to peel off the aggregate particles in the projections and recesses with the tip of the spatula, but they were so tightly bonded that they could not be easily removed. From the above, the absolute viscosity at 60 ° C as a binder is about 15
It has been found that, when 000 poise or more is used, a uniform surface-treated layer can be constructed without flowing the binder on the road surface with the passage of time even if the road surface has irregularities.

<Experiment 4> Influence of type of binder and amount of decomposition aid used on film forming time Cationic asphalt emulsion (trade name "Sampizol K", manufactured by Nichireki Co., Ltd.), decomposition aid as binder The same one used in Experiment 1 was used as the same as in Experiment 1 while changing the amount of the active ingredient in the aqueous solution of the decomposition aid with respect to 100 parts by weight of the evaporation residue of the cationic asphalt emulsion to various ratios. It was made to collide in the air in the same manner as above and sprayed on an asphalt concrete plate of 30 cm × 30 cm × 5 cm. After spraying, it was observed at various curing times whether the sprayed surface changed from brown to black and a decomposed film of the cationic asphalt emulsion was formed. Further, as a binder, a general-purpose asphalt emulsion pk-4 for tack coat (manufactured by Nichireki Co., Ltd.) was used, and a decomposition aid was not used in the same manner except that a decomposition aid was not used. The presence or absence was observed and used as a control.
The test temperature was 20 ° C.

The physical properties of the binder used are as follows. Cationic asphalt emulsion (trade name "Sanpyzol 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 evaporation residue at 25 ° C: 180 (kgf
・ Cm) Tenacity of 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) 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 evaporation residue at 25 ° C .: 5 (kgf ·
cm) Absolute viscosity of evaporation residue at 60 ° C .: 2000 (poise)

The results are shown in Table 5. In Table 5, ◯ indicates that film formation was observed, and x indicates that film formation was not observed.

[0114]

[Table 5]

As is clear from the results shown in Table 5, when the decomposition aid is used in an amount of 0.4 parts by weight or more based on 100 parts by weight of the evaporation residue of the cationic asphalt emulsion, the amount of the active ingredient in the aqueous solution is 100% by weight. It can be seen that the time until film formation is remarkably shortened, and the decomposition and curing of the cationic asphalt emulsion are remarkably accelerated. In addition, the cationic asphalt emulsion satisfying the characteristics a) to d) defined in the present invention has a higher decomposition and curing time than the conventional asphalt emulsion for tack coat as a control even when a decomposition auxiliary is not used. Was short.

<Experiment 5> Effect of Decomposition Auxiliary Agent on Film Forming Time and Adhesiveness As a binder, the same cationic asphalt emulsion used in Experiment 4 (trade name "Sampiesol K", Nichireki Co., Ltd.) was used. Manufactured by using various types of decomposition aids and colliding them in the air in the same manner as in Experiment 4,
It was sprayed on a 30 cm × 30 cm × 5 cm asphalt concrete plate. After spraying, as in Experiment 4, it was observed at various curing times whether the sprayed surface changed from brown to black and a decomposed film of the cationic asphalt emulsion was formed. However, the experiment was conducted by fixing the amount of the active ingredient in the aqueous solution of the decomposition auxiliary agent to 2.5 parts by weight with respect to 100 parts by weight of the evaporation residue of the cationic asphalt emulsion.
In addition, the same test was conducted using only the binder without using the decomposition aid, and used as a control.

In parallel, the effect of the difference in the decomposition aid on the adhesion rate was examined in the same manner as in Experiment 1 except that the binder and the decomposition aid were combined in the same manner as above and the curing time was variously changed. It was However, the experiment was conducted by fixing the amount of the active ingredient in the aqueous solution of the decomposition auxiliary agent to 2.5 parts by weight with respect to 100 parts by weight of the evaporation residue of the cationic asphalt emulsion.
In addition, the same test was conducted using only the binder without using the decomposition aid, and used as a control. Table 6 shows the results of observation of the presence or absence of film formation and the results of determination of the adhesion rate.

[0118]

[Table 6]

As is clear from the results in Table 6, among the various decomposition aids tested, alkylbenzene sulfonates such as sodium alkylbenzene sulfonate and ammonium alkylbenzene sulfonate, or sodium alkylmethyl taurate, di. Octyl / sulfo / sodium succinate is excellent in both film forming time and adhesiveness. Among them, alkylbenzene sulfonates such as sodium alkylbenzene sulfonate and ammonium alkylbenzene sulfonate are preferable, and sodium benzene sulfonate is more preferable. Was the best.

<Experiment 6> Effect of spraying form of binder and decomposition aid on film-forming time and adhesion rate As the binder, the same cationic asphalt emulsion (trade name "Sampesol K") used in Experiment 4 was used. , Manufactured by Nichireki Co., Ltd., and used as a decomposition auxiliary agent in Experiment 1.
5w of the same sodium alkylbenzene sulfonate (trade name "NEOPEREX", manufactured by Kao Corporation) used in
The presence / absence of film formation and the adhesion rate at various curing times were examined in the same manner as in Experiment 4 except that the / w% aqueous solution was used and the spraying form was changed variously. However, the experiment was conducted by fixing the amount of the active ingredient in the aqueous solution of the decomposition auxiliary agent to 2.5 parts by weight with respect to 100 parts by weight of the evaporation residue of the cationic asphalt emulsion.

The spraying form was changed as follows. The spraying height H of the binder was 5 from the spraying surface as in Experiment 1.
It was 0 cm. (1) After spreading the binder, spray the decomposition aid on the spray surface (2) After spraying the decomposition aid, spray the binder on the spray surface (3) Spray the binder and the decomposition aid Both are sprayed simultaneously so as to collide on the surface (collision height H _Y = 0). _Y = (1/5)
H) (5) Spraying both the binder and the decomposition aid at the same time so that they collide in the air on the spraying surface (collision height H _Y = (2/5)
H) (6) Spray the binder and the decomposition aid simultaneously so that they collide in the air on the spray surface (collision height H _Y = (3/5)
H) (7) Spraying both the binder and the decomposition aid at the same time so that they collide in the air on the spraying surface (collision height H _Y = (4/5)
H)

The results are shown in Table 7.

[0123]

[Table 7]

As is clear from the results shown in Table 7, the binder and the decomposition aid are used in the same manner as compared with the spraying forms of (1) and (2) in which the binder and the decomposition aid are sprayed before and after. The spraying forms of (3) to (7), which are sprayed at a certain time, were superior in both the film forming time and the adhesion rate, but the binder and the decomposition aid were made to collide on the spraying surface (3). Better results were obtained with the spray forms (4) to (7) in which the binder and the decomposition aid were made to collide in the air than the spray form. In addition, among the spray forms of (4) to (7) in which the binder and the decomposition aid are collided in the air, the collision height _HY is (1
(5) H or (4/5) H or (7), which is (2/5) H or (3/5) H (5) and (6) In the case of, the collision height is (1/4) H ~ even when colliding in the air.
It can be seen that the range of (3/4) H is good.

[0125] Further, for each sample for which curing was observed for 30 minutes in which film formation was observed, the film formation layer was partially destroyed at the tip of the spatula and the internal state was examined. The boundary surface between the binder and the decomposition aid was formed into a film, but the road surface side portion of the binder was still in a state before film formation. Similarly, in the sample of the spray form of (2), the boundary surface between the binder and the decomposition aid was formed into a film, but water still remained on the road surface side portion of the decomposition aid. On the other hand, uniform film formation was observed in the samples of the dispersion forms (3) to (7).

The present invention will be further described below with reference to examples, but it goes without saying that the present invention is not limited to these examples.

<Example 1> As the binder, the same cationic asphalt emulsion (trade name "Sampesol K", manufactured by Nichireki Co., Ltd.) used in Experiment 4 was used in Experiment 1 as a decomposition aid. Using the same 5w / w% aqueous solution of sodium alkylbenzene sulfonate (trade name "NEOPEREX", manufactured by Kao Corporation)
Similarly, using the same aggregate used in Experiment 1, and using a work vehicle of the form shown in FIG. 7, 3 m × 10 m on the test road surface.
The spray-type surface treatment method was applied over the section. As for construction, while the work vehicle is traveling at about 5 km / h, the binder and the decomposition aid are simultaneously sprayed, and the decomposition aid sprayed from one spray nozzle is sprayed from the one spray nozzle. I made it to collide with in the air. The height from the road surface to the spray nozzle of the binder is 50 cm, and the decomposition aid collides with the binder at a position about 2/3 of the spray height of the binder (a position at a height of about 33 cm from the road surface). Thus, the position and angle of each spray nozzle were adjusted. The ratio of the decomposition aid used to the binder was 1.5 parts by weight as the amount of the active ingredient in the aqueous solution of the decomposition aid based on 100 parts by weight of the evaporation residue of the cationic asphalt emulsion. After spraying the binder and decomposition aid,
Immediately, the aggregate was sprayed, and after the aggregate was sprayed, it was lightly pressed by a vibrating roller. Although there was a rut with a maximum depth of about 15 mm on the constructed road surface, it was possible to construct a uniform surface treatment layer without the binder flowing. After the construction, a curing period of 60 minutes was passed, and the heavy load vehicle was allowed to pass 30 times on a trial basis, but no scattering of aggregate was observed. In addition, an attempt was made to peel off the aggregate with the tip of a spatula, but the aggregate was strongly bonded to the road surface, and it was difficult to peel it off.

Example 2 A cation-based modified artificial asphalt emulsion prepared separately as a binder was used, and as the aggregate, a light-colored aggregate having a particle size of 5-8 mm (red, trade name "Road Serum R", internal and external ceramics) was used. (Made by corporation)
In the same manner as in Example 1, the spray-type surface treatment method was applied. The properties of the modified artificial asphalt used were as follows. Cationic modified artificial asphalt emulsion (trade name "Karaphalt EMK", manufactured by Nichireki Co., Ltd.) Evaporation residue: 67 (%) Penetration of evaporation residue: 92 (1/10 mm) Softening point of evaporation residue: 76 (° C) Toughness of evaporation residue at 25 ° C: 178 (kgf
・ Cm) Tenacity of evaporation residue at 25 ° C: 157 (kg
f · cm) Absolute viscosity of evaporation residue at 60 ° C .: 20500 (poise) Viscosity at 20 ° C .: 55 (centipoise)

Although there were some cracks having a width of 5 mm or less on the constructed road surface, they were completely covered by the constructed surface treatment layer. The constructed surface treatment layer was bright red, and after 60 minutes of curing, 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. Furthermore, a heavy-duty vehicle was tested on a trial basis.
It was passed twice, but no scattering of aggregate was observed.

<Example 3> As an aggregate, a particle size of 5-pre-coated with 0.5% by weight of straight asphalt was used.
The spray-type surface treatment method of the present invention was carried out in the same manner as in Example 1 except that 8 mm aggregate was used and the fiber material was sprayed immediately after spraying the binder and the decomposition aid. The fiber material used was polyester fiber (100 denier, 48 filaments, fiber length: 20 mm, manufactured by Toyobo Co., Ltd.).

The surface treatment layer thus constructed was uniform, and after the construction,
After a curing period of 60 minutes, an attempt was made to peel off the aggregate particles with the tip of the driver, but it was fairly strongly bonded to the road surface. Further, the heavy load vehicle was passed 30 times on a trial basis, but no scattering of aggregate was observed.

[0132]

As described above, according to the spraying type surface treatment method of the present invention, since the cationic asphalt emulsion having specific characteristics is used as the binder and the decomposition aid is used, the decomposition of the cationic asphalt emulsion is performed. The curing time can be shortened, the curing time can be shortened, and a strong and durable stable surface treatment layer can be constructed. In particular, a binder in which the decomposition aid injected from one spray nozzle is sprayed from one spray nozzle so that both the cationic asphalt emulsion as the binder and the decomposition aid collide in the air. By spraying both so as to collide with each other in the air, the mixing of the binder and the decomposition aid becomes more uniform, and it is possible to construct a surface-treated layer having excellent durability and strength in an extremely short time. It will be possible.

Further, as a binder, the evaporation residue at 60 ° C.
When the absolute viscosity of about 15,000 poise or more is used, even if there is unevenness or slope on the construction road surface, the sprinkled binder will not flow unnecessarily,
It is possible to construct a uniform and durable surface-treated layer without excess or shortage of binder depending on the location. Further, by spreading or laying the fiber material at the same time as or before or after the binder or the decomposition aid, it is possible to construct a surface-treated layer that is excellent not only in durability but also in waterproofness. .

The spray-type surface treatment method of the present invention is a surface treatment layer which is constructed by using a specific work vehicle as disclosed in the present specification so as to further enhance the uniformity, durability and stability. It is a very useful and excellent invention together with the pavement of the present invention having a surface treatment layer to be constructed. Moreover, in the spraying type surface treatment method of the present invention, color pavement can be realized very easily by selecting the aggregate to be used and using the colored one. Furthermore, since the spray-type surface treatment method of the present invention uses a cationic asphalt emulsion as a binder, it can be applied at room temperature and does not generate carbon dioxide due to heating of the material, which is excellent in terms of the global environment. It is a construction method. INDUSTRIAL APPLICABILITY The present invention exerts excellent effects not only on repairing existing road surfaces but also on new road surfaces, and brings new possibilities to the technical field.

[Brief description of drawings]

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

FIG. 2 is a view showing a state in which a binder and a decomposition aid are sprayed before and after.

FIG. 3 is a front view showing an example of a binder spraying device used in the present invention.

FIG. 4 is a plan view showing an example of a binder spreading device used in the present invention.

FIG. 5 is a side view showing a positional relationship between the binder spraying device and the decomposition aid spraying device used in the present invention.

FIG. 6 is a plan view showing the positional relationship between the spraying device for the binder and the spraying device for the decomposition aid used in the present invention.

FIG. 7 is a diagram showing an example of a work vehicle of the present invention.

[Explanation of symbols]

1 road surface 2 binder 3 aggregate 4 scattered aggregates 5 Decomposition aid 6 Curing layer 7, 10 spray bar 8, 11 spray nozzle 9 Injected binder 12 Sprayed decomposition aid 13 work vehicle 14a, 14b front and rear wheels of work vehicle 15 Aggregate bottle 16 carry-in socket 17 Transport pump 18 Decomposition auxiliary agent tank 19 Aggregate hopper 20 Conveyor 21 push roller 22 work steps 23 Heating device 24 Fiber Material Storage Device 25 fiber materials 26 nozzles 27 short fibers 28 Sheet-shaped fiber material storage device 29 Sheet fiber material 30 sending device 31 Pressing roller α Spray nozzle spray angle β spray nozzle mounting angle

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-9-158112 (JP, A) JP-A-10-54003 (JP, A) JP-A-9-21102 (JP, A) French patent application publication 2695949 (FR, A 1) French patent application published 2626907 (FR, A 1) (58) Fields investigated (Int.Cl. ⁷ , DB name) E01C 7/35 E01C 7/24 E01C 23/00

Claims (15)

(57) [Claims] 1. The following a) toe)
Binder made of thione-based asphalt emulsion and its decomposition
And a decomposition aid that promotes
Spreading type surface including the step of spreading and the step of spreading aggregate
Processing method; a) Penetration of evaporation residue is 50 to 150 (1/10 m
m), b) the evaporation residue has a softening point of 50 to 120 ° C., c) The toughness of the evaporation residue at 25 ° C. is 70 to 22.
0 kgf · cm, d) Tenacity of the evaporation residue at 25 ° C. is 30-2.
00 kgf · cm, e) The absolute viscosity of the evaporation residue at 60 ° C. is about 1500.
0 poise or more . 2. A spray-type surface treatment method according to claim 1, wherein a viscosity at 20 ° C. of cationic bitumen emulsion is binding material is about 40 centipoise or higher. 3. The decomposition aid is one or more kinds selected from the group consisting of anionic emulsifiers, alkaline inorganic salts, anionic polymer flocculants, anionic asphalt emulsions, and anionic latexes. The spray-type surface treatment method according to claim 1 or 2 , which is an agent. 4. The decomposition aid has a concentration of 1.5 to 30 w / w.
% Of the aqueous solution, the spraying type surface treatment method according to claim 1, 2 or 3 . 5. The decomposition aid is used as a binder evaporation residue 10.
The spraying type surface treatment method according to claim 1, 2, 3 or 4 , wherein 0.4 to 4.0 parts by weight of the active ingredient is sprayed with respect to 0 parts by weight. And wherein the binder and the decomposition adjuvants sprayed at the same time, claim impinging both in the air 1, 2, 3, 4 or
5. The spray-type surface treatment method described in 5 . 7. The binder and the decomposition aid are sprayed using one or more spray nozzles, respectively, and the binder injected from one spray nozzle and the decomposition aid injected from one spray nozzle. The spraying type surface treatment method according to claim 6 , wherein the agent is collided in the air. 8. The spread width at the collision position of the decomposition aid injected from each spray nozzle is substantially the same as the spread width at the collision position of the binder injected from the corresponding spray nozzle which is a collision partner. The spray-type surface treatment method according to claim 7 . Injection density on collision position of the binding material 9. decomposing auxiliary agent injected from the individual spray nozzles, the entire spread width in the collision position, according to claim 7 or 8, wherein the substantially uniform Scatter-type surface treatment method. 10. A spraying binder and decomposition adjuvants, spray-type surface treatment method according to any one of claims 1 to 9 the process of spraying the aggregate on the sprayed surface is repeated one or more times . 11. A work vehicle equipped with at least a binder spraying device, a decomposition aid spraying device, and an aggregate spraying device is used to set a substantially constant time interval after spraying the binder and the decomposition aid. The spray-type surface treatment method according to claim 1 , wherein the aggregate is sprayed. 12. A pavement body constructed by the spraying type surface treatment method according to any one of claims 1 to 11 . 13. A device for spraying a binder having one or more spray nozzles, and a device for spraying a decomposition aid having one or more spray nozzles.
Decomposition auxiliary agent sprayed from the No. 1 spray nozzle and the binding material sprayed from the No. 1 spray nozzle in the air , and
The height from the surface to the spray nozzle for the binder is H
, One or more spray nozzles for injecting the binder and one or more sprays for injecting the decomposition aid so that they collide at a position in the range of (1/4) H to (3/4) H. Nozzle and is arranged , and individual spray nozzle
On the collision position of the decomposition aid injected from the
The injection density is the odor of the entire spread width at the collision position.
So that it is almost even.
The turn is on the flat surface of the fan-shaped jet of binder.
The angle should be symmetrical with respect to the opposite vertical plane.
One or more spray nozzles for injecting a mixture and disassembly
Arranged with one or more spray nozzles for injecting auxiliary agent
Work vehicle that is. 14. The work vehicle according to claim 13, further comprising an aggregate spraying device. 15. sprayer of the binder, spraying device degradation adjuvants, and spraying apparatus of aggregate, between them, claims tire or crawler work vehicle are arranged so as not to position 14 The work vehicle described.