JP2000104209A - Scattering type surface treatment construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scattering type surface treatment construction method allowing to firmly and stably bind aggregate on a road without using excessive binding material, a pavement body excellent in durability and stability built by such surface treatment construction method, and an operation vehicle capable of easily realizing such surface treatment construction method. SOLUTION: A scattering type surface treatment construction method scattering a first aggregate 2 on a road and a binding material 3 over it, followed by scattering a second aggregate 4 of smaller diameter than that of the first aggregate 2 over it, and a pavement body built by such surface treatment are provided. In addition, an operation vehicle equipped with a scattering device of the aggregate 2, 4 and a scattering device of the binding material 3 in such sequence from the front of the vehicle is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying type surface treatment method, and more particularly, to a spraying method of an aggregate and a binder, by regulating the particle size of the aggregate to be used and / or the viscosity of the binder. The present invention relates to a spray-type surface treatment method capable of constructing a surface treatment layer which is strong and has excellent durability and stability.

[0002]

2. Description of the Related Art As road pavement becomes available for traffic,
The aging and deterioration gradually progress, and the road surface may be worn to form irregularities, and the pavement surface may have cracks or the like. If the irregularities and cracks are left, the safety of the passing vehicle may be threatened, and rainwater or the like may permeate through the cracks into the inside of the pavement and cause damage or destruction of the pavement itself.

Conventionally, as a method of repairing such aged and deteriorated road pavement, a spray surface treatment method, a mixed surface treatment method, and an overlay method have been proposed. Among them, the spraying type surface treatment method, for example, ages or deteriorates, and spreads a binder made of bituminous material such as asphalt on a road surface where unevenness or cracks are generated, and then aggregates on the binder. The operation of spraying is repeated one or more times, and the aggregate is bonded to the road surface by the binder,
This is a method of constructing one or more layers of a binder and an aggregate on a road surface.

[0004] This spraying type surface treatment method is relatively effective as a method for repairing aged and deteriorated pavement because the surface of the pavement can be repaired relatively easily. However, the repair method using an asphalt mixture is not effective. On the contrary, since the aggregate is merely bonded to the road surface by the binder, the aggregate scattered on the binder by the scratching force or the impact force received from the tire of the passing vehicle, etc. A phenomenon of scattering was sometimes observed. If the aggregate is scattered, the bonding material will appear directly on the road surface, causing the road surface to flash and become extremely slippery, causing slippage of passing vehicles, which may lead to traffic accidents. was there.

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

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and makes it possible to firmly and stably aggregate an aggregate without using an excessive binder. Scattered surface treatment method that can be bonded to the road surface, and pavement with excellent durability and stability constructed by such treatment method, and furthermore, such treatment method can be easily performed. An object of the present invention is to provide a work vehicle that can be realized.

[0007]

Means for Solving the Problems As a result of repeated studies on the spraying type surface treatment method, the present inventors have found that
Rather than spraying the binder first and then the aggregate,
By sprinkling the aggregate first, then sprinkling the binder, and then further sprinkling the aggregate, surprisingly, a strong, durable and highly stable spray type surface treatment layer is constructed. The inventors have found that the present invention can be performed and completed the present invention.

That is, according to the present invention, after the first aggregate is sprayed on the road surface and the binder is sprayed thereon, the second aggregate having a smaller diameter than the first aggregate is further sprayed. By providing a scattered surface treatment method and a pavement constructed by such a scattered surface treatment method, further, an aggregate-spreading device and a binder-spreading device are arranged in this order from the front of the vehicle. An object of the present invention is to solve the above-described problem by providing a work vehicle provided with the work vehicle.

In the spray type surface treatment method of the present invention,
The first aggregate is preferably compacted after the application and before the binder is applied. By this rolling, the first aggregate is settled at a stable position on the road surface, and it is possible to realize a stronger and more durable surface treatment layer. Also,
When the first aggregate is thus compacted before the application of the binder, the first aggregate comprises a surface treatment layer consisting of a binder and a second aggregate which are subsequently constructed and a road surface. Plays a role as a buffer layer connecting between, for example, even if there is an inconvenient inconsistency in the construction road surface, to correct the inconsistency,
The surface treatment layer to be built thereon is made smooth and uniform.

In addition, as the first aggregate, the aggregate whose grain size is restricted to a predetermined range, that is, when the minimum grain size of the aggregate is less than 10 mm in the nominal size of the sieve opening, The difference between the diameter and the maximum particle size is 2 mm in the nominal size of the sieve aperture.
When the aggregate having a size of less than 5 mm and the minimum particle size is 10 mm or more in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is 3 mm in the nominal size of the sieve opening.
In the case of using aggregates having a diameter of 6 mm or less, the bonding strength between the aggregates and between the aggregates and the road surface is further increased, and a more excellent surface treatment layer can be constructed.

In the spray type surface treatment method of the present invention,
The binder has an absolute viscosity of about 15,000 at 60 ° C.
It is desirable to use more than poise. If a binder having a viscosity equal to or more than a predetermined value is used as described above, even when the binder is sprayed on the road surface with severe irregularities and deformation after the first aggregate, the sprayed binder can be applied to the road surface. A uniform and stable bonding force can be obtained without flowing along the slope and making the thickness of the bonding material on the road surface non-uniform.

In the spray type surface treatment method of the present invention,
The second aggregate is spread on the binder and has a role of constructing the surface treatment layer together with the first aggregate and the binder, and at the same time, is constructed on the basis that the second aggregate is dispersed as the top layer. It also has a function as a function-imparting layer for imparting various functions to the surface-treated layer, or as a protective layer for protecting the constructed surface-treated layer.

Examples of the function-imparting layer include a colored aggregate, a light-reflective, brilliant, fluorescent, and / or luminous aggregate, an aggregate having an antifreezing effect, and an elastic bone. By using one or more kinds of aggregates selected from the materials as the second aggregate, it is possible to impart color to the surface treatment layer to be constructed to form a color pavement, or to provide light reflection. To give the property or fluorescence or light storage properties to light reflection, fluorescence or light storage pavement, furthermore,
Construction of anti-freezing pavement can also be performed at will. In addition, aggregates of different stone types, types,
Species or two or more types and / or aggregates having different functions may be used alone or in combination of two or more types. For example, a brilliant aggregate is used for the uppermost layer and a colored layer An aggregate having a different function may be used for each layer to be constructed, for example, using an aggregate. In addition, as the protective layer, it is possible to prevent damage to the first aggregate, or to penetrate between the first aggregates to contribute to the mutual engagement of the aggregates and prevent the aggregates from scattering. Can be.

In the present invention, when the fiber material is scattered or spread at the same time as the binder or before or after the binder, the fiber material and the binder are mixed, and the aggregates and the aggregates are more strongly bonded to each other. In addition to bonding the aggregate and the road surface, it is possible to construct a spray-type surface treatment layer that is excellent in durability and water resistance.

In the spray type surface treatment method of the present invention,
In particular, it is desirable that the time from the application of the binder to the application of the second aggregate is a relatively short fixed time interval. The binder decreases in temperature or decomposes immediately after being sprayed.
If the time until the application of the aggregate is irregularly changed, the state of the binder at the time when the second aggregate is applied is also irregularly changed, and as a result, the uniform and excellent durability is obtained. No surface treatment layer can be obtained. In order to maintain the time from the dispersing of the binder to the dispersing of the second aggregate at a relatively short fixed time interval, a work vehicle equipped with at least the dispersing device for the binder and the dispersing device for the aggregate is used. It is desirable to construct. Examples of such a working vehicle include, for example, Japanese Patent Application No. 10-158664 and Japanese Patent Application No. 10-1586 by the same applicant.
No. 65, Japanese Patent Application No. 10-172107, Japanese Patent Application No. 10-172119, and Japanese Patent Application No. 10-172119.
A work vehicle equipped with one or a plurality of sets of an aggregate dispersing device and a binder dispersing device, such as a work vehicle disclosed in the specification of Japanese Patent No. 177986. In addition, such a work vehicle is further equipped with a device for spreading or spreading a fiber material, so that the fiber material is sprayed or spread at the same time as or before or after the binder, and subsequently, relatively It is possible to easily apply the aggregate at short fixed time intervals.

The spray type surface treatment method of the present invention is not limited to a general road, but also includes a motorway, a campus road, a park road, a walking path, a bicycle path, a sports ground, a parking lot, an airfield, a port facility,
The present invention can be applied to pavement such as a public hall or a public space, a wide sidewalk, etc., and can be used not only for repair but also for constructing a surface layer in new construction.

[0017]

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

First, the materials used will be described. <Binder> As the binder used in the spray surface treatment method of the present invention, asphalt, asphalt emulsion, resin,
Paints, pavement tar, cutback asphalt and the like.

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

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

The mixing ratio of the asphalt to the rubber and the thermoplastic polymer in the modified asphalt is such that the rubber and the thermoplastic polymer are usually in an amount of 2 to 20 parts by weight based on 100 parts by weight of the asphalt. A range is preferred. If the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the performance as a modified asphalt cannot be exhibited, and the adhesive strength between the aggregates and between the aggregates and the road surface and the grasping power are generally asphalt. On the other hand, when the amount of the rubber and the thermoplastic polymer exceeds 20 parts by weight, the cohesive force is too strong, and the aggregate returns and the aggregate is scattered. easy. The asphalt in the asphalt or the modified asphalt used as the binder of the present invention has a penetration (25 ° C.) of 4 in consideration of the characteristics after use.
It is preferable to use one having about 0 to 200.

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

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

As the emulsifier, any of a cationic type, an anionic type and an amphoteric type can be used.

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

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

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

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

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

The rubber and thermoplastic high molecular weight polymer used for the modification include natural rubber, rattling, 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, alffin rubber, styrene-butadiene block copolymer rubber, styrene-isoprene block Rubber such as copolymer rubber, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyethylene, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, vinyl acetate / acrylate copolymer And other high-molecular-weight thermoplastic polymers. These rubbers or thermoplastic polymers can be used alone or in combination of two or more. These rubbers and thermoplastic polymers are, for example, powdery, latex, emulsion, and water-based, and latex, emulsion, and water-based are mainly obtained by a post-mix type method. It is used exclusively for modified asphalt emulsions, but may be used for modified asphalt emulsions by a premix type method.

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

The mixing ratio of the asphalt to the rubber and the thermoplastic polymer in the modified asphalt emulsion is preferably 2 to 20 parts by weight of the rubber and the thermoplastic polymer per 100 parts by weight of the asphalt. Ranges from 3 to 7 parts by weight. When the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the effect of adding the rubber and the thermoplastic polymer to the adhesive force and the grasping power to the aggregate after the modified asphalt emulsion is decomposed and cured is reduced. In contrast, when the amount of the rubber and the thermoplastic polymer exceeds 20 parts by weight, the cohesive force is too strong, and the aggregate is separated from the aggregate, causing the aggregate to scatter. easy. The asphalt in the asphalt emulsion and the modified asphalt emulsion used as the binder in the present invention has a penetration (25 ° C.) of 40 to 20 in consideration of the properties after decomposition and hardening.
It is preferable to use one having about 0.

The concentration of the evaporation residue (solid matter) of the asphalt emulsion and the modified asphalt emulsion used as a binder in the present invention is usually preferably about 30 to 70% by weight, particularly preferably 50 to 68% by weight. Are more preferred. If the concentration of the evaporation residue is less than 30% by weight, it cannot be used, but it is difficult to obtain the necessary degree of viscoelasticity as a binder, while the concentration of the evaporation residue is 7%.
If it exceeds 0% by weight, it cannot be said that it can never be used, but it tends to be difficult to secure good workability.

Further, these asphalt emulsions or modified asphalt emulsions may contain an ultraviolet absorber, various additives, and the like for the purpose of improving heat resistance, preventing deterioration due to ultraviolet rays, improving workability, and improving adhesiveness. A viscosity modifier and the like may be added.

The decomposition of asphalt emulsion generally depends on spontaneous decomposition, but in some cases, it may be forcibly decomposed using a decomposition accelerator.

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

Further, it is preferable that the above-mentioned binder has an absolute viscosity at 60 ° C. of about 15,000 poise or more, as described later. In addition, the absolute viscosity at 60 ° C. used in the present specification refers to a “pavement test method handbook”, published by the Japan Road Association, June 10, 1995, page 398-402, a 60 ° C. viscosity test. It shall be the value measured based on the method.

<Aggregate> The aggregate used as the first and second aggregates in the present invention may be an aggregate for pavement described in "Asphalt Pavement Outline" issued by the Japan Road Association. Any material can be used, for example, crushed stone, cobblestone, gravel, steel slag, and the like. Further, asphalt-coated aggregates obtained by coating these aggregates with asphalt, recycled aggregates, and the like can also be used. In addition, with granular materials similar to this, artificially fired aggregate, fired foamed aggregate, artificial lightweight aggregate,
Ceramic particles, loxobite, aluminum particles, plastic particles, ceramics, emery, construction waste, fibers and the like can also be used.

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

As the second aggregate, colored aggregates having various colors, light reflectivity, glitter, fluorescence, and / or
Or one or two selected from a phosphorescent aggregate, an aggregate having an antifreezing effect, and an elastic aggregate.
It is also possible to use more than one kind of aggregate. For example, natural colored aggregates, artificially fired aggregates, fired foamed aggregates, artificial lightweight aggregates, ceramic particles, loxobite, aluminum particles, plastic particles, ceramics, ceramics, emery, etc. It is possible to easily realize color pavement excellent in durability and stability. In addition, these colored aggregates are usually used without a pre-coat, but when used by pre-coating, it is a matter of course to use a material which does not impair the colored properties inherent in the aggregates. is there. Further, it is also possible to apply a coating with colored asphalt, a fluorescent paint or a luminous paint to an ordinary aggregate to use it as a colored aggregate, a fluorescent aggregate or a luminous aggregate.

Light reflectivity, glitter, fluorescence, and / or
Luminescent aggregates include glass beads, silicon carbide particles, fused alumina-based artificial aggregates, limestone-based artificial aggregates, feldspars, quartz, aluminum silicofluoride particles, glass scraps such as broken glass bottles, and fluorescent artificial aggregates. Aggregate, phosphorescent aggregate and the like can be mentioned. Aggregates having an antifreeze effect include rock salt and artificial antifreeze aggregates (for example, trade name "Koland", manufactured by Nichireki Co., Ltd.). As an aggregate having elasticity,
For example, there are waste tire rubber particles, natural rubber particles, styrene / butadiene rubber particles, chloroprene rubber particles, and the like.If aggregates having these elasticities are used, not only can the surface treatment layer be given impact absorption, Deformation due to noise reduction and even the weight of passing vehicles during freezing in winter,
It also has the effect of destroying attached ice. Further, one kind or two or more kinds of aggregates having different stone qualities, types, and colors may be used, and / or one kind or two or more kinds of aggregates having different functions may be used in combination. For example, an aggregate having different functions may be used for each of the layers to be constructed, for example, using a brilliant aggregate, and using a colored aggregate for a layer immediately below.

On the other hand, the aggregate used as the first aggregate is
As described later, when the minimum particle size of the aggregate is less than 10 mm in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is 2 mm or more and 5 m in the nominal size of the sieve opening.
When the minimum particle size is 10 mm or more in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is more than 3 mm in the nominal size of the sieve opening, 6mm
It is desirable that: Note that the “nominal size of the sieve opening” referred to in this specification is a nominal size that is commonly used when expressing a sieve, and is JIS Z8801.
And the reference size of the opening of the screen sieve specified in Table 1 has a correspondence relationship as shown in Table 1.

[0043]

[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 opening, and the reference size of the mesh of the mesh sieve specified in JIS Z8801 is 9. It means that it contains aggregate particles passing through a 5 mm sieve, and that the minimum particle size of the aggregate is 10 mm or more in the nominal size of the sieve opening means that the aggregate is JIS Z88.
The standard size of the mesh sieve specified in 01 is 9.5m
m means that it does not contain aggregate particles passing through the sieve. In addition, the difference between the minimum particle size and the maximum particle size is 2 mm or more in the nominal size of the sieve aperture, and when the minimum particle size is 5 mm in the nominal size of the sieve aperture, the maximum particle size of the aggregate A diameter sieve shall pass at least a sieve having a nominal size of at least 2 mm greater than 5 mm, i.e., a sieve having a nominal size of 7 mm, but not passing through a sieve having a nominal size of 6 mm smaller than that. Means and also
When the difference between the minimum particle size and the maximum particle size is less than 5 mm in the nominal size of the sieve aperture, when the minimum particle size is 5 mm in the nominal size of the sieve aperture, the maximum particle size of the aggregate The sieve has a nominal size of less than 5 mm than 5 mm,
That is, it means passing through a sieve having a nominal size of 8 mm. Similarly, when the difference between the minimum particle size and the maximum particle size is more than 3 mm and 6 mm or less in the nominal size of the sieve aperture, when the minimum particle size is 10 mm in the nominal size of the sieve aperture, The largest particle size of the population is at least a sieve having a nominal size of 3 mm larger than 10 mm, ie, a sieve having a nominal size of 6 mm larger than 10 mm without passing through a sieve having a nominal size of 13 mm, that is, a sieve having a nominal size of 16 mm. Means passing through a sieve.
Note that whether to pass through the sieve or not to pass through is a judgment at a substantial and common sense level, and that some dust-like substances pass through the sieve or If any grains remain on the sieve, but are negligible in the aggregate aggregate, they shall not affect the decision not to pass through the sieve. Hereinafter, in this specification, unless otherwise specified, the particle size and particle size of the aggregate are based on the nominal size of the sieve opening.

The upper and lower limits of the particle size of the aggregate used as the first aggregate in the present invention are not particularly limited as long as the above-mentioned condition of the particle size is satisfied. Is 5 mm or more and the maximum particle size is 20 mm or less. If the minimum particle size is less than 5 mm, the particle size of the aggregate is too small, and there is a possibility that unevenness, cracks and the like on the existing road surface may not be effectively covered. On the other hand, if the maximum particle size exceeds 20 mm, not only does the road surface after construction become rough, but also because the vehicle travels on the surface treatment layer, the traffic noise generated by the traveling of the vehicle increases, The material may be scattered, which is not preferable.

The particle size of the second aggregate is not particularly limited as long as it is smaller in diameter than the first aggregate, but it is usually fine sand, medium sand, coarse sand or a particle size of 2.5 to 5 mm. No. 7 crushed stone is used.

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

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

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

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

<Experiment 1> Effect of Grain Size of First Aggregate on Bonding Strength with Road Surface In order to investigate the effect of the grain size of the first aggregate on the durability of the constructed spray type surface treatment layer, The adhesion test described below was performed according to the Vialit adhesion test method.

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

On the other hand, thickness 2 mm, size 200 × 200
mm metal plates were prepared by the number of aggregate samples, and the above-mentioned various aggregate samples were firstly dispersed as 90 pieces each as a first aggregate, and then asphalt emulsion (as an asphalt emulsion ( The trade name “Surfacesol”, manufactured by Nichireki Co., Ltd.) was changed to 1.15 kg / cm ² for an aggregate sample having a minimum particle size of less than 10 mm, and a bone having a minimum particle size of 10 mm or more. 1.50 for the material sample
kg / cm ² and then the above coarse sand
After spraying 20 cc each, a load of 7 kgf / cm of linear pressure is applied, and 15 times each in the opposite direction, a total of 30 cc.
Rotating pressure. After standing for a predetermined period of time, while holding the aggregate horizontally with the adhering surface of the aggregate down, a diameter of 5 mm
An iron ball of 0 mm and weighing 500 g was dropped onto the center of the metal plate three times within 10 seconds. The number of the first aggregate particles that had fallen off the metal plate due to the fall of the iron ball was counted and designated as a. The adhesion rate (%) is expressed as follows: adhesion rate (%) = {(90−a) / 90} × 1
Calculated as 00. The test was performed three times for each sample, and the results were averaged, and those having an adhesion rate of 80% or more were evaluated as satisfactory. Table 2 shows the results.

[0054]

[Table 2]

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

<Experiment 2> Effect of the viscosity of the binder on the uniformity of the surface treatment layer In order to investigate the effect of the viscosity of the binder on the uniformity of the surface treatment layer, the absolute viscosity at 60 ° C. shows various values. A binder was prepared, and a No. 1 sample used in Experiment 1 was first placed on an experimental pavement having an uneven surface cut out for pavement replacement from a rutted road surface. The aggregate sample No. 3 was sprayed at a rate of 9 (liter / m ² ), and after lightly compacting, various binders were sprayed at a rate of 1.2 (liter / m ² ). Then, the same coarse sand as used in Experiment 1 was
(Liter / m ² ) and rolled. The difference between the concave and convex portions of the experimental pavement was about 20 mm on average. After curing, the binder was cured, and 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.

[0057]

[Table 3]

As is evident from the results in Table 3, the binder having an absolute viscosity of about 8,000 poise and about 13,000 poise at 60 ° C. was sprayed on the first aggregate layer or the first aggregate layer by the action of gravity after spraying. It tends to flow between the aggregates and flow into the concave portion of the road surface and stay there. At the top of the convex portion of the road surface, the thickness of the binder is as thin as about 1.5 mm or 2 mm, and conversely,
At the bottom of the concave part of the road surface, about 4.5 mm or about 4 mm
Thus, a thick binder layer was formed. Aggregate grain in the convex part,
Attempting to peel off with the tip of a spatula was relatively easy. Further, in the concave portion, the amount of the binder is too large, and there is a risk that a flash phenomenon may occur when the concave portion is actually used for traffic of a vehicle.

On the other hand, the absolute viscosity at 60 ° C. is about 150
When it is more than 00 poise, the flow of the binder is suppressed, and there is not much difference in the thickness of the binder layer at the bottom of the road surface concave portion and the top of the convex portion. An attempt was made to peel off the aggregate particles at the protrusions and recesses at the tip of the spatula, but they were so strongly bonded that they could not be easily peeled off. From the above, the absolute viscosity at 60 ° C. of about 15
If a material with a surface roughness of 000 poise or more is used, even if the road surface has irregularities, the binder does not flow on the first aggregate layer or the gap between the first aggregates and flows on the road surface, so that a uniform surface can be obtained. It was found that a treatment layer could be built.

Next, the spraying type surface treatment method of the present invention will be described with reference to the drawings.

First, after cleaning the construction road surface with a road sweeper, the first aggregate 2 is sprayed on the road surface 1 as shown in FIG. Prior to spraying the first aggregate, water or a primer may be sprayed. Water has the effect of lowering the road surface temperature that has risen, for example, in the summer, and the primer has the effect of enhancing the adhesion and tackiness between the aggregate and the road surface. The amount of the first aggregate to be sprayed is 0.1 g per 100 m ² .
A range of 6 to 2.5 m ³ is preferred. If the amount of aggregate scattered per 100 m ² is less than 0.6 m ^3, it causes a flash phenomenon, and the road surface is not sufficiently leveled. Conversely, if the amount of aggregate per 100 m ² exceeds 2.5 m ³ , the surplus aggregate will not only hinder the traffic of vehicles due to floating stones but also make it difficult for pedestrians to walk. Also, it is desirable that the larger the aggregate particle size, the larger the amount of aggregate to be scattered. The first aggregate is usually
It is sprayed in a state of being heated to 100 to 170 ° C, but may be sprayed at normal temperature. After the first aggregate is sprayed, it is preferable to roll the spray surface from the viewpoint of stabilizing the first aggregate layer.

Subsequently, the binder 3 is sprayed. Application rate of the binder is not particularly limited as long as the aggregate is coupled to the road surface, usually in the range of 100 m ² per 70 to 270 liters are preferred. If the amount of binder per 100 m ² is less than 70 liters, there is a possibility that the bonding strength and adhesion between the road surface and the aggregate and between the aggregates and the aggregate may be insufficient. Cause. The amount of the binder to be scattered varies according to the particle size of the first aggregate. Generally, the more the aggregate having a large particle size is used as the first aggregate, the more the amount of the binder scattered is. More.

After dispersing the binder, the second aggregate 4 is dispersed on the dispersed binder. The application amount of the second aggregate is 100
range of m ² per 0.2～1.5M ³ are preferred. 100
If the amount of the aggregate per m ² is less than 0.2 m ³ , the gap between the first aggregates cannot be sufficiently filled, and it is difficult to obtain a highly durable surface treatment layer. Destabilize. It also causes a flash phenomenon. Conversely, 10
When the second aggregate per 0 m ² exceeds 1.5 m ^3, not only prevents the passage of vehicle excess aggregate becomes pumice, it is walking and difficult road for pedestrians.

After the second aggregate 4 is sprayed, further compaction is performed, and the floating stones are removed by the road sweeper to open to traffic. As the compacting machine, for example, a self-propelled compacting machine such as a tire roller, an iron wheel roller, and a vibration roller can be used. The surface treatment layer of the present invention constructed as described above, after being subjected to traffic, over time,
For example, it becomes stable as shown in FIG. That is,
As shown in FIG. 2, a binder is attached from above the first aggregate so as to wrap the first aggregate, and further, a gap between the first aggregates and a first aggregate are formed. The second aggregate enters the gap with the road surface, and the aggregates bite each other to form a strong surface treatment layer.

It is desirable that the above-described application of the binder and the application of the second aggregate be performed at as short a fixed time interval as possible. For example, Japanese Patent Application Hei 1 by the same applicant
0-158664, Japanese Patent Application No. 10-158665.
Patent Specification, Japanese Patent Application No. 10-172107, Japanese Patent Application No. 10-172119, and Japanese Patent Application No. 10-17.
It is desirable to use a work vehicle as disclosed in US Pat. In the work vehicle disclosed in these specifications, the binder spraying device and the aggregate spraying position are both in front of the front wheel of the work vehicle, between the front wheel and the rear wheel, or behind the rear wheel. The aggregate is scattered immediately after the binder is scattered, so that the tires or crawlers of the working vehicle do not step on the scattered binder, and the binder once scattered. There is no danger of peeling off or adhering to tires or the like and soiling other road surfaces. Moreover, in the work vehicle disclosed in the above specification, both the dispersing device for the binder and the dispersing device for the aggregate are mounted on a single work vehicle, and the respective dispersing operations are performed. It is possible to manage and construct the entire process from the dispersal of the binder to the dispersal of the aggregate as a consistent operation, and it is possible to construct a stable and stable surface treatment layer with high durability. An example of such a working vehicle is shown in FIG.
5 to FIG.

FIG. 3 shows an example of a work vehicle in which the binder dispersing device and the aggregate dispersing device are both arranged before the front wheels of the work vehicle. In FIG. , 6a,
Numeral 6b denotes a front wheel and a rear wheel of the work vehicle 5, 7 denotes a spray nozzle as a binder spraying device, and 8 denotes an aggregate bin as an aggregate spraying device. Examples of the aggregate bin include, for example, the above-mentioned Japanese Patent Application No. 10-158 by the same applicant.
664, Japanese Patent Application No. 10-158665,
Japanese Patent Application No. 10-172107, Japanese Patent Application No. 10-17
The one mounted on the working vehicle disclosed in Japanese Patent Application No. 2119 and Japanese Patent Application No. 10-177886 is used. The binder is carried in from a supply vehicle (not shown) via a carry-in socket denoted by reference numeral 9, is pressure-fed to a spray bar 11 by a carrier pump 10, and is sprayed from a spray nozzle 7 toward a road surface.

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

FIG. 4 shows an example of a work vehicle in which the binder dispersing device and the aggregate dispersing device are both disposed between the front wheel and the rear wheel of the work vehicle. The same reference numerals are given. The work vehicle 5 shown in FIG. 4 includes a storage tank 18 of a binder, and the binder is introduced into the storage tank 18 from a supply vehicle (not shown) via the carry-in socket 9 and, for example, reaches a predetermined temperature. It is kept in the maintained state. 19
Denotes a water tank, and 21 denotes a primer tank. The binder is pumped by a transport pump 10 to a spray bar 11 and sprayed from a spray nozzle 7. The aggregate is
As in the example of FIG. 3, the aggregates are sprayed from the aggregate bin 8 onto the layer of the binder. Reference numeral 20 denotes a mounting table on which the rear wheels of the aggregate transport vehicle 12 are mounted, reference numeral 22 denotes a spray bar for water or primer, and reference numeral 23 denotes a spray nozzle. 24 is a work step, 25 is a heating device for heating the road surface, and 26 is an energy source for the heating device 25.

FIG. 5 shows an example of a work vehicle in which the binder dispersing device and the aggregate dispersing device are both arranged behind the rear wheel of the work vehicle, and is the same as FIGS. 3 and 4. Are given the same reference numerals. After the binder is carried in from a supply vehicle (not shown) through the carry-in socket 9, the binder is temporarily stored in a tank (not shown) in the work vehicle 5 and is sprayed on the road surface from the spray nozzle 7. On the other hand, the aggregate is carried into an aggregate popper 27 from an aggregate transport vehicle (not shown), transported to a transport conveyor 28, and scattered from the aggregate bin 8. In the working vehicle of FIG. 5, the dispersing device for the binder and the dispersing device for the aggregate are reversed, and the dispersing device for the aggregate and the dispersing device for the binder are arranged in this order from the front of the vehicle to the rear wheels of the vehicle. It may be arranged rearward.

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

Further, in the spraying type surface treatment method of the present invention, the fiber material may be sprayed or spread at the same time as the spraying of the binder or before or after the spraying of the binder. In order to spray or spread the fibrous material at the same time as or before and after the spraying of the binder, it is desirable to use, for example, a work vehicle as shown in FIG. The work vehicle in FIG. 6 is an example of a work vehicle in which all of a binder dispersing device, an aggregate dispersing device, and a fiber material dispersing or spreading device are disposed behind the rear wheels of the work vehicle.
3 to 5 are denoted by the same reference numerals.

In FIG. 6, reference numeral 29 denotes a storage device for a fibrous material such as a monofilament, a multifilament, a spun yarn and a twisted yarn. Is to be injected. The fiber material storage device 29 can store the short fibers 32 together, and the short fibers 32 are also jetted from the nozzle 31. In the illustrated example, the fiber material is sprayed after the binder is sprayed from the nozzle 7. However, the distance between the nozzle 7 of the binder and the nozzle 31 of the fiber material is reduced, and the two are separated. It is also possible to spray at the same time and to mix with each other in the air.

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

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

As described above, by sprinkling or spreading the fiber material at the same time as or before or after the binder, the binder and the fiber material are mixed with each other and impregnated, and the aggregate is firmly bonded. Thus, a surface treatment layer having not only excellent durability and stability but also excellent crack followability and waterproofness can be constructed.

Further, as shown in FIGS. 7 and 8, for example, an aggregate dispersing device 8a for the first aggregate is disposed in front of the dispersing device 7 for the binder in the vehicle. It may be provided separately from the aggregate spraying device 8b. 7 and 8
In the above, two types of aggregates are stored in the aggregate hopper 27, and the first aggregate aggregate spraying device 8a and the second aggregate aggregate spraying are carried out by separate conveyors 28a and 28b, respectively. It is transported to the device 8b. Alternatively, the aggregate dispersing devices 8a and 8b may be of a large capacity, and the necessary amount may be stored in advance. If such a working vehicle is used, the spray-type surface treatment layer of the present invention can be constructed at a stretch. It is a matter of course that a rolling means (not shown) may be provided between the aggregate dispersing device 8a for the first aggregate and the dispersing device 7 for the binder.

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

<Example 1> Using the following materials, a spraying type surface treatment method of the present invention was experimentally applied using a work vehicle as shown in FIG. The traveling speed of the work vehicle is about 5 km / h
Met. First, after cleaning the construction road surface with a road sweeper, the work vehicle was advanced to spray only the first aggregate.
After spraying, it was lightly rolled with an iron roller. Subsequently, using the same work vehicle, the binder and the second aggregate were sprayed on the first aggregate layer. After spraying, rolling was performed with a tire roller, and floating stones and the like were removed again with a road sweeper, thereby completing the construction. There was a rut with a maximum depth of about 15 mm on the construction road surface, but a uniform surface treatment layer could be constructed without the binder flowing. Immediately after the construction, a heavy-duty vehicle was passed on a test basis continuously for half a day, but no aggregate was scattered.

<Materials used> First aggregate: crushed stone (produced by Kuzu, Tochigi Prefecture) Pre-coated with straight asphalt having a particle size of 5-8 mm and 0.5% by weight Spraying temperature Heating (170 ° C) Spraying amount 1.1 (m ³⁾ / 100 m ² ) Binder: Modified asphalt (Gumphalt S-SP, manufactured by Nichireki Co., Ltd.) Absolute viscosity at 60 ° C. 19,500 poise Spraying temperature Heating (170 ° C.) Spraying amount 140 (l / 100 m ² ) Second aggregate: Crushed (Tochigi Kuzu produced) particle size 2.5-5mm precoat without spraying temperature heating (170 ° C.) application rate 0.4 ^(m 3 / 100m ²⁾

<Example 2> A spray type surface treatment method of the present invention was experimentally applied in the same manner as in Example 1 except that the following materials were used. Some cracks having a width of 5 mm or less existed on the construction road surface, but were completely covered by the constructed surface treatment layer. The constructed surface treatment layer was uniform. Immediately after the construction, an attempt was made to peel off the aggregate particles at the tip of the driver, but it was strongly bonded to the road surface. Furthermore, when the heavy load vehicle was passed continuously for half a day, no aggregate was scattered, and no cracks floated.

<Material used> First aggregate: crushed stone (produced by Kuzu, Tochigi Prefecture) Pre-coated with straight asphalt having a particle size of 5-8 mm and 0.5% by weight Spraying temperature Heating (170 ° C) Spraying amount 1.1 (m ³⁾ / 100 m ² ) Binder: modified asphalt emulsion (Surfacesol,
Absolute viscosity at 60 ° C. 15000 poise Spraying temperature Heating (60 ° C.) Spraying amount 160 (l / 100 m ² ) Second aggregate: coarse sand (from Kinugawa, Tochigi Prefecture) No pre-coating Spraying temperature Room temperature (18 ° C.) ) application rate 0.5 ^(m 3 / 100m ²⁾

<Embodiment 3> Using the working vehicle shown in FIG.
The spray-type surface treatment method of the present invention was applied experimentally in the same manner as in Example 1 except that the following fiber material was sprayed immediately after the spraying of the binder. The constructed surface treatment layer was uniform. Immediately after the construction, an attempt was made to peel off the aggregate particles at the tip of the driver, but it was strongly bonded to the road surface.
Furthermore, when the heavy load vehicle was passed for half a day continuously, no aggregate was scattered.

Fiber material: polyester fiber (100 denier, 48 filament, manufactured by Toyobo Co., Ltd.) Fiber length 20 mm Spraying amount 90 (g / m ² )

<Example 4> A spray type surface treatment method of the present invention was applied in the same manner as in Example 1 except that the following was used as the second aggregate. The constructed surface treatment layer is
It has a bright red color, and color pavement could be easily constructed. Also, scattering of aggregate particles was hardly observed.

Second Aggregate: Red Aggregate (Road Serum No. 7-R, manufactured by Chugai Ceramics Co., Ltd.) Particle size 2.5-5 mm Spraying temperature Normal temperature (18 ° C.) Spraying amount 0.5 (m ³ / 100m ² )

<Example 5> A spray type surface treatment method of the present invention was applied in the same manner as in Example 1 except that the following was used as the second aggregate. The constructed surface treatment layer is
Even at night, the vehicle's headlights reflected and glittered, making it easy to build light-reflective pavements. Also, scattering of aggregate particles was hardly observed.

[0087] The second Aggregate: artificial bone material (Twinkle White, manufactured out Ceramics Co.) having a grain size of 2.5-5mm spraying temperature room temperature (18 ° C.) application rate 0.5 ^(m 3/100 m ²⁾

<Comparative Example 1> No. 1 shown in Table 2 was used as the first aggregate. A surface treatment layer was constructed on a road surface adjacent to Example 1 in the same manner as in Example 1 except that the aggregate of No. 6 was used and the following was used as a binder. Immediately after construction,
When a heavy-duty vehicle was allowed to pass for half a day, flashes and scattered aggregates were found on the rut.

Binder: Experimental modified asphalt emulsion A Absolute viscosity at 60 ° C. 8,000 poise Spraying temperature Heating (180 ° C.) Spraying amount 110 (l / 100 m ² )

<Comparative Example 2> The following materials were used in the same manner as in Example 1 except that only the binder and the second aggregate were sprayed using the work vehicle shown in FIG. A surface treatment layer was constructed on the adjacent road surface. The binder flowed into the rutted road surface, and a non-uniform surface treatment layer in which a portion of excess binder and a portion of insufficient binder were mixed was constructed. Immediately after the construction, a heavy load-carrying vehicle was passed continuously for half a day. As a result, scattering of aggregates was found in the shortage of the binder.

Binder: Experimental modified asphalt emulsion B Absolute viscosity at 60 ° C. 13,000 poise Spraying temperature Heating (60 ° C.) Spraying amount 90 (l / 100 m ² ) Second aggregate: crushed stone (Kuzuki, Tochigi Prefecture) particle size 2.5-5mm precoat without spraying temperature room temperature (18 ° C.) application rate 0.5 ^(m 3 / 100m ²⁾

[0092]

As described above, according to the spray type surface treatment method of the present invention, after the first aggregate is first sprayed on the road surface, the binder and the second aggregate having a smaller diameter than the first aggregate are spread. Since the aggregates are scattered, the binder wraps around the first aggregate, and the second aggregate is formed between the first aggregate particles and in the gap between the first aggregate and the road surface. It is possible to construct a very strong and stable surface treatment layer with less scattering of aggregates by entering and engaging with each other. In addition, by rolling the spray surface of the first aggregate, the position of the first aggregate on the road surface becomes stable, and even when the construction road surface has some unevenness,
Effective terrain correction is performed.

Further, since the aggregate having the regulated particle size is used as the first aggregate, the adhesion of the aggregate to the road surface is increased, and a strong and durable stable surface treatment layer is constructed. can do. Furthermore, since a binder having an absolute viscosity at 60 ° C. of about 15,000 poise or more is used, even when there is unevenness or inclination on the construction road surface,
The sprayed binder does not flow indiscriminately, the binder does not become excessive or insufficient depending on the location, and a uniform and highly durable surface treatment layer can be constructed.

As the second aggregate, a colored aggregate, light-reflective, brilliant, fluorescent, and / or luminous aggregate may be used.
If one or more aggregates selected from an aggregate having an antifreezing effect and an elastic aggregate are used,
Functional pavement such as color pavement, light-reflective pavement, and antifreeze pavement can be easily realized. Furthermore, by sprinkling or spreading the fiber material at the same time as or before or after the binder, it is possible to construct a surface treatment 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 that can be constructed with even more uniformity, durability, and stability by using a specific work vehicle as disclosed in this specification. As a result, it is a very useful and excellent invention together with the pavement of the present invention having the surface treatment layer to be constructed. The present invention exerts excellent effects not only on repairing an existing road surface but also on a newly-constructed road surface, and brings new possibilities to the technical field.

[Brief description of the drawings]

FIG. 1 is a view showing an example of a spray type surface treatment method of the present invention.

FIG. 2 is a view showing an example of a spray type surface treatment method of the present invention.

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

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

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

FIG. 6 is a view showing still another example of the work vehicle used in the present invention.

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

FIG. 8 is a view showing another example of the work vehicle of the present invention.

[Explanation of symbols]

 Reference Signs List 1 road surface 2 first aggregate 3 binder 4 second aggregate 5 work vehicle 6a, 6b tire of work vehicle 7,23 spray nozzle 8,8a, 8b aggregate bin 9 carry-in socket 10 transport pump 11,22 spray Bar 12 Aggregate transport vehicle 13 Aggregate dispersion width adjustment door 14 Aggregate discharge roller 15 Support arm 16 Push roller 17 Engine 18 Binder storage tank 19 Water tank 20 Placement table 21 Primer tank 24 Work step 25 Heating device 26 Energy source 27 Aggregate hopper 28 Conveyor 29 Fiber material storage device 30 Fiber material 31 Nozzle 32 Short fiber 33 Sheet fiber material storage device 34 Sheet fiber material 35 Feeding device 36 Pressing roller

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2D051 AA08 AB01 AB03 AD01 AD02 AE04 AF01 AG01 AG03 AG11 EA02 EA06 EB05 EB06 2D052 AA04 AA08 AB01 AC01 AD11 BA03 BA20 DA02 DA14 DA21

Claims (12)

[Claims] 1. A spray type surface treatment in which a first aggregate is sprayed on a road surface, a binder is sprayed thereon, and then a second aggregate having a smaller diameter than the first aggregate is further sprayed. Construction method. 2. The spraying type surface treatment method according to claim 1, wherein the binder is sprayed after the surface of the sprayed first aggregate is rolled. 3. As the first aggregate, when the minimum particle size of the aggregate is less than 10 mm in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is the size of the sieve opening. When the nominal size of the aggregate is 2 mm or more and less than 5 mm, and when the minimum particle size is 10 mm or more, the difference between the minimum particle size and the maximum particle size is the size of the sieve mesh. An aggregate having a nominal size of more than 3 mm and 6 mm or less is used.
Scattering type surface treatment method described. 4. The spraying surface treatment method according to claim 1, wherein the second aggregate is sprayed as a protective layer. 5. The method according to claim 5, wherein the second aggregate is a colored aggregate, light-reflective,
2. One or more aggregates selected from brilliant, fluorescent and / or luminous aggregates, aggregates having an antifreezing effect, and aggregates having elasticity. ,
A spray-type surface treatment method according to 2, 3 or 4. 6. An absolute viscosity at 60 ° C. of about 15,000.
The spray surface treatment method according to claim 1, 2, 3, 4, or 5, wherein a binder material having a poise or more is used. 7. The spraying type surface treatment method according to claim 1, wherein the fiber material is sprayed or spread at the same time as or before or after the binder. 8. Spreading the binder at a substantially constant time interval after spraying the first aggregate, using a work vehicle provided with at least a device for spraying the binder and a device for spraying the aggregate; And / or distributing the second aggregate at substantially constant time intervals after dispersing the binder.
A spray-type surface treatment method according to any one of the above. 9. A pavement constructed by the spray-type surface treatment method according to claim 1, 2, 3, 4, 5, 6, 7, or 8. 10. A work vehicle provided with at least an aggregate dispersing device and a binder dispersing device in this order from the front of the vehicle. 11. A vehicle rearward of the bonding material spraying device,
The work vehicle according to claim 10, further comprising a second aggregate dispersing device. 12. The work vehicle according to claim 10, further comprising a device for spraying or spreading the fiber material.