JP2000336603A - Dispersion type surface treatment construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the dispersion type surface treatment construction method capable of strongly and stably bonding the aggregate onto the road surface in the normal temperature condition without using an excessive quantity of the binding agent, to provide a pavement to be constructed by this treatment construction method and having excellent durability and stability, and to provide a working vehicle to be used for this treatment construction method. SOLUTION: A dispersion type surface treatment construction method includes a process for simultaneously dispersing the biding agent made of the anion group or nonionic group asphalt emulsion having a specified characteristic and the decomposition auxiliary substance for accelerating decomposition and a process for dispersing the aggregate. A pavement is provided by this dispersion type surface treatment construction method. A working vehicle provided with a binder dispersing device having a spray nozzle 8 and a decomposition auxiliary substance dispersing device having a spray nozzle 11 so that the decomposition auxiliary substance injected from the spray nozzle 11 collides with the binding agent injected from the spray nozzle 8 in the air is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

BACKGROUND OF THE INVENTION Road pavement has become
Aging and deterioration gradually progress, and the road surface may be worn, unevenness may occur, and cracks may occur on the pavement surface. If the irregularities and cracks are left, the safety of the passing vehicle may be threatened, and rainwater or the like may penetrate 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 spray surface treatment method, a mixed surface treatment method, and an overlay method have been proposed. In the spraying type surface treatment method, for example, as shown in FIG. 1, a binder 2 made of a bituminous material such as asphalt is sprayed on a road surface 1 on which aging or deterioration has occurred to cause unevenness or cracks. Subsequently, the operation of spraying the aggregate 3 thereon is repeated once or a plurality of times, and the aggregate 3 is joined to the road surface 1 by the binder 2, and the binder 3 and the aggregate 3 are formed on the road surface 1. This is a method of constructing one or two layers, or three or more layers.

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

[0005] As an attempt to prevent such aggregates from scattering, it is conceivable to increase the amount of binder to be scattered and to firmly anchor the aggregates. When the road surface temperature rises in summer or the like when sunshine is strong, a flash phenomenon occurs due to an excessive amount of the binder, which sometimes results in a traffic obstacle.

In recent years, from the viewpoint of suppressing the influence on the global environment, it has been attempted to use asphalt emulsion which can be used without heating as a binder.
Asphalt emulsions generally decompose and harden slowly.
The curing time needs to be long, which leads to a long time until the opening of traffic, which has the disadvantage of causing traffic congestion.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and is intended to provide a solid and stable aggregate without using excessive binder. Spray-type surface treatment method that can be connected to the road surface and can be performed at room temperature and has a short curing time, It is another object of the present invention to provide a working vehicle used for such a processing method.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted research on a spraying type surface treatment method, particularly on a binder, and as a result, have found that an anionic asphalt emulsion or a nonionic asphalt emulsion having specific properties as a binder. Further, by using a decomposition aid that promotes the decomposition of the anionic or nonionic asphalt emulsion, a scattered surface treatment layer that is strong, durable and excellent in stability at room temperature construction, In addition, they have found that they can be constructed in a short curing time, and have completed the present invention.

That is, the present invention provides the following properties a) to d): a) The penetration of the evaporation residue is 50 to 150 (1/10 m
m), b) the softening point of the evaporation residue is 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 to 2
A step of spraying a binder comprising an anionic or nonionic asphalt emulsion having the following formula: The above object is achieved by providing a spray-type surface treatment method including

[0010] The present invention also provides a pavement constructed by the spraying surface treatment method as described above.
Or at least a dispersing device for spraying a binder having two or more spray nozzles and a device for dispersing a decomposition aid having one or more spray nozzles, wherein the decomposition aid sprayed from one spray nozzle is one spray A work vehicle in which one or more spray nozzles for injecting the binder and one or more spray nozzles for injecting the decomposition aid are arranged so that the binder ejected from the nozzles collides with the binder in the air. The object is to solve the above problem by providing.

The binder used in the present invention desirably has an absolute viscosity at 60 ° C. of at least about 15,000 poise at 60 ° C. in addition to the above characteristics a) to d). 60% of the evaporation residue as binder
If the absolute viscosity at ℃ is about 15000 poise or more, even when the binder is sprayed on the road surface with severe unevenness and deformation to construct the surface treatment layer, the sprayed binder may not spread over time. Thus, the surface treatment layer having a uniform and stable bonding force can be constructed without flowing along the slope of the road surface and causing the film thickness of the binder on the road surface to be non-uniform.

Further, the binder used in the present invention is:
Desirably, the viscosity at 20 ° C. is at least about 40 centipoise (cps). If the binder at 20 ° C. has a viscosity of about 40 centipoise or more,
Even when a binder is sprayed on a road surface with severe unevenness or deformation to build a surface treatment layer, the sprayed binder flows along the slope of the road immediately after spraying, and the thickness of the binder on the road is reduced. A surface treatment layer having a uniform and stable bonding force can be constructed without becoming non-uniform.

As the decomposition aid used in the present invention, any one can be used as long as it can promote the decomposition of the anionic or nonionic asphalt emulsion as the binder. When the binder is an anionic asphalt emulsion, a divalent inorganic salt,
One or more decomposition aids selected from the group consisting of inorganic acids, organic acids, and amine-based cationic surfactants, and among them, one or more decomposition aids selected from amine-based cationic surfactants It is desirable to use an auxiliary agent, and when the binder is a nonionic asphalt emulsion, it is preferable to use one or more decomposition auxiliary agents selected from polymer flocculants.

In the spray type surface treatment method of the present invention,
The binder and the decomposition aid are sprayed on the road at the same time or at the same time. Spraying the binder and the decomposition aid on the road surface one after the other means that after applying either the binder or the decomposition aid to the construction site on the road first, the decomposition aid or the binder is first applied. Means to spray from above. As a result of the sprinkling, the binder and the decomposition aid come into contact and come into contact on the road surface. Also, spraying the binder and the decomposition aid on the road at the same time means that the binder and the decomposition aid to be sprayed on the same construction site on the road are overlapped at least partially with the time of application of both. As a result of being sprayed at the same time, the binder and the decomposition aid simultaneously reach the same place on the road surface and meet on the road surface, or meet in the air,
Contact and mixing. In this regard, the term “on a road surface” in the present specification refers to a road surface on which a scatter-type surface treatment method is applied when only one surface treatment layer is formed by the scatter-type surface treatment method of the present invention. When the surface treatment layer constructed by the spraying surface treatment method is a multilayer having two or three or more layers, it goes without saying that the surface treatment layer refers to the surface treatment layer previously constructed.

In the spray type surface treatment method of the present invention,
Since the binder and the decomposition aid are sprayed before and after or at the same time, the sprayed binder and the decomposition aid meet on the road surface or in the air, contact, mix, and act by the action of the decomposition aid. Decomposition of the anionic or nonionic asphalt emulsion as the binder is promoted, and the film formation time and the curing time by the binder are reduced. In the spraying type surface treatment method of the present invention, the binder and the decomposition aid may be sprayed one after another, or may be sprayed at the same time, but the curing time of the binder is reduced, and From the viewpoint of constructing a surface treatment layer having excellent strength and durability, it is better to spray the binder and the decomposition aid at the same time. Most preferably.

When the binder and the decomposition aid are sprayed at the same time and they collide with each other 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;
It is preferable to collide with a decomposition aid ejected from a spray nozzle in the air. In addition, it is desirable that the spread width of the decomposition adjuvant sprayed from each spray nozzle at the collision position substantially coincides with the spread width of the binder sprayed from the corresponding spray nozzle as the collision partner at the collision position. Further, the injection density of the decomposition aid ejected from the individual spray nozzles at the collision position with the binder is, over the entire spread width at the collision position,
It should be almost uniform. By doing so, it is possible to cause the binder and the decomposition aid to collide, contact, and mix uniformly and at a controlled ratio, thereby further shortening the time required for the decomposition and curing of the binder, and This also has a positive effect on the durability and strength of the surface treatment layer to be obtained.

In the spray type surface treatment method of the present invention,
It is desirable that the time from the application of the binder and the decomposition aid to the application of the aggregate is a relatively short fixed time interval. Decomposition of the binder proceeds immediately after contact with the decomposition aid or immediately after being sprayed on the road surface,
If the time from the application of the binder and the dissolution 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 highly durable surface treatment layer cannot be obtained. In order to maintain the time from the application of the binder and the disintegration aid to the application of the aggregate at a relatively short fixed time interval, the apparatus for dispersing the binder, the apparatus for dissolving the auxiliary and the apparatus for dispersing the aggregate are required. It is desirable to use a mounted work vehicle. As such a working vehicle, for example, Japanese Patent Application No.
158664, Japanese Patent Application Nos. 10-158665, 10-172107, 10
-172119 and Japanese Patent Application No. 10-1779
A work vehicle as disclosed in Japanese Patent No. 86 is mentioned. In the work vehicles disclosed in these specifications, the position of spraying various objects to be spread from the device for dispersing the binder and the device for dispersing the aggregates is in front of the front wheel of the work vehicle, between the front wheel and the rear wheel. ,
Or, it is arranged to be behind the rear wheel,
Aggregate is immediately sprayed on the binder and the disintegration aid after being sprayed on the road surface, so the tires or crawlers of the work vehicle are once sprayed without stepping on the sprayed binder or the dissolution aid. There is no danger that the binding material peels off or adheres to the tire or the like and stains other road surfaces or the like. Moreover, in the work vehicle disclosed in the above specification, various spraying devices are mounted together on a single work vehicle, and each spraying is performed, so that the spraying of the binder and the decomposition aid is performed. It is possible to manage and construct as a consistent work until the dispersion of aggregates,
It is possible to construct a uniform and durable stable surface treatment layer.

The spray type surface treatment method of the present invention is not limited to general roads, but may be used for motorways, campus roads, park roads, walking paths, bicycle paths, sports grounds, parking lots, airports, port facilities,
It is also applicable to pavement such as public halls and other public spaces, wide sidewalks, etc.It can be used not only for repairs but also for construction of surface layers in new construction work. It is also optional to provide an overlay layer on the surface treatment layer constructed by the spray surface treatment method of the present invention.

[0019]

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

First, the materials used will be described. <Binder> The binder used in the spray surface treatment method of the present invention is an anionic or nonionic asphalt emulsion and has the following characteristics a) to d), namely: a) needles of evaporation residue The penetration is 50-150 (1 / 10m
m), b) the softening point of the evaporation residue is 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 to 2
More preferably, the characteristics shown in the following a ′) to d ′), ie, a ′) the penetration 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, d ′) Tenacity of the evaporation residue at 25 ° C. is 70 to 70 kgf · cm.
180 kgf · cm.

The penetration of the evaporation residue is 50 (1/10 m
If it is less than m), the asphalt after the asphalt emulsion is decomposed becomes too hard, which is not preferable. If the penetration exceeds 150 (1/10 mm), the asphalt after the asphalt emulsion is decomposed becomes too soft. It is not preferable.

If the softening point of the evaporation residue is less than 50 ° C., the asphalt after decomposition of the asphalt emulsion is liable to cause a flash phenomenon on a road surface under a high temperature such as in summer and is sticky, which is not preferable. If the temperature exceeds 120 ° C., the asphalt after 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 preferable because the asphalt becomes insufficient and the waist becomes too weak.
If it exceeds cm, the asphalt after the asphalt emulsion is decomposed is too sticky and too stiff, which tends to make it brittle against traffic loads, which is not preferable.

Further, if the tenacity of the evaporation residue at 25 ° C. is less than 30 kgf / cm, the asphalt after decomposition of the asphalt emulsion will not be stretched, which is not preferable, and conversely, the tenacity is 200 kgf / cm.
If the amount is larger than the above, the asphalt elongation after decomposition of the asphalt emulsion becomes too large, which is not preferable.

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

The binder used in the present invention desirably has, in addition to the above properties, an absolute viscosity of the residue at 60 ° C. of about 15,000 poise or more. If a binder having an absolute viscosity at 60 ° C. of about 15,000 poise or more is used as a binder,
Even when a binder is sprayed on a road surface with severe unevenness and deformation to construct a surface treatment layer, the sprayed binder flows along the slope of the road surface with the passage of time and the binder material on the road surface It is possible to construct a surface treatment layer having a uniform and stable bonding force without a nonuniform film thickness. Here, the absolute viscosity is described in "Pavement Test Method Handbook", Japan Road Association, published on June 10, 1995, 398-402.
It is a value measured based on the viscosity test method described on page.

Further, the binder used in the present invention is:
Desirably, the viscosity at 20 ° C. is at least about 40 centipoise. If a binder having a viscosity of about 40 centipoise or more at 20 ° C. is used as a binder, even when a binder is sprayed on a road surface with severe irregularities or deformation to form a surface treatment layer, the sprayed binder is sprayed. Immediately after that, the surface treatment layer does not flow along the slope of the road surface and the thickness of the binder on the road surface does not become uneven, and a surface treatment layer having a uniform and stable bonding force can be constructed. Here, the viscosity is
Measured according to the viscosity test method described in “Pavement Test Method Handbook Separate Volume (Provisional Test Method)”, edited by The Japan Road Association, published by Maruzen Co., Ltd., Oct. 20, 1996, pages 69-74. Value.

The anionic or nonionic asphalt emulsion used as a binder in the present invention is any anionic or nonionic asphalt emulsion as long as the above-mentioned characteristics a) to d) are satisfied. For example, natural asphalt such as lake asphalt, straight asphalt, blown asphalt, semi-blown asphalt, petroleum asphalt such as solvent deasphalted asphalt (for example, propane deasphalted asphalt), artificial asphalt, heavy oil, tar, pitch, etc. Seeds, or a mixture of two or more kinds, using an anionic or nonionic emulsifier, and further adding a dispersing agent or a protective colloid as necessary, and then appropriately adding a colloid mill, a homogenizer, a homomixer, or the like. With a suitable emulsifier, It is obtained by emulsified in. These asphalt emulsions are preferably modified asphalt emulsions as described later.

The artificial asphalt used in the anionic or nonionic asphalt emulsion of the present invention includes:
An artificially prepared binder that can be used in the same way as asphalt and is substantially colorless. Here, “substantially colorless” refers to the color, light reflectivity, brilliancy, fluorescence, luminous properties, etc. inherent in the aggregate used in combination, and pigments mixed as necessary. It is colorless enough to not impair the color of, it does not necessarily need to be completely transparent, even if it is translucent,
It may have a slight candy color. Further, when the artificial asphalt is emulsified into an artificial asphalt emulsion, the artificial asphalt emulsion may be substantially colorless at a stage where the reaction or decomposition of the artificial asphalt emulsion proceeds and develops a predetermined strength as a binder, for example, Even if it has a color such as white when it is emulsified by an emulsifier and exists as an artificial asphalt emulsion, any material can be used as long as it is substantially colorless at a stage where it is decomposed to develop strength as a binder. .

The artificial asphalt used in the anionic or nonionic asphalt emulsion of the present invention may be prepared using any raw material. For example, a petroleum compound oil and a petroleum resin may be used. By weight percentage, petroleum blended oil: petroleum resin = (60-85%) :( 40-15
%).
If the proportion of the petroleum blended 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, if the ratio of the petroleum compound oil exceeds 85% by weight, the viscosity and the adhesiveness and the tackiness are undesirably reduced, though the viscosity is reduced. The artificial asphalt emulsion obtained by emulsifying the artificial asphalt obtained by such a composition is substantially colorless, and does not impair the original color tone of the aggregate even when used with, for example, a colored aggregate. Is sufficiently exhibited.

The petroleum blended oil used in the above-mentioned artificial asphalt is also called a process oil, and has an aromatic carbon atom having an aromatic carbon number of 35% or more of the total carbon number, and a naphthenic ring carbon number having a total carbon number of not less than 35%. There are a naphthene type having 30 to 45% and a paraffin type having a 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 these are used. More than one species is used as appropriate.

As the petroleum resin used for the above-mentioned artificial asphalt, an aliphatic type (C5 type) mainly composed of a fraction having a boiling point of 20 to 60 ° C. (C5 fraction) separated by distillation of naphtha decomposition products. A) petroleum resins, also aromatic (C9-based) petroleum resins whose main component is a fraction (C9 fraction) having a boiling point of 160 to 260 ° C., which is separated by distillation of naphtha decomposition products; Aliphatic / aromatic copolymer (C5 / C9) petroleum resin obtained by copolymerizing petroleum resin, and alicyclic ring mainly composed of high-purity dicyclopentadiene separated by distillation of naphtha decomposition product There is a group (DCPD) petroleum resin and the like, and in the artificial asphalt used in the present invention, one or more of these are used in combination.

In the present invention, an anionic or nonionic emulsifier is used as an emulsifier for emulsifying bitumen such as asphalt or artificial asphalt.

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 formalin modified product,
Examples thereof include alkali lignin salts, lignin sulfonates, alkali salts of casein, and polyacrylates.

The nonionic emulsifiers usable in the present invention include alkylphenols, adducts of alkylene oxides such as mono- and polyhydric alcohol acids, aliphatics, aliphatic amines, aliphatic amides and ethanolamines. , And the like.

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 anionic or nonionic asphalt emulsion used as the binder of the present invention is selected from rubber and thermoplastic polymer in addition to the above-mentioned emulsified and dispersed bitumen such as asphalt or artificial asphalt.
It is desirable to add one or two or more species and modify them to use as an anionic modified asphalt emulsion or a nonionic modified asphalt emulsion. In the present specification, simply referring to an anionic asphalt emulsion or a nonionic asphalt emulsion includes an anionic modified asphalt emulsion and a nonionic modified asphalt emulsion, respectively.

The rubber and the thermoplastic 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, alffine rubber, styrene / butadiene block copolymer rubber, styrene / butadiene / Styrene copolymer rubber, styrene
Rubber such as isoprene block copolymer rubber, and ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyethylene, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, vinyl acetate / acrylate A thermoplastic polymer such as a copolymer is exemplified. These rubbers or thermoplastic polymers can be used alone or in combination of two or more. These rubbers and thermoplastic polymers are, for example, powder, latex, emulsion, and aqueous, and latex, emulsion, and aqueous 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 mixing ratio of the bitumen substance such as asphalt or artificial asphalt in the modified asphalt emulsion to the rubber and the thermoplastic polymer is such that the rubber and the thermoplast are mixed with 100 parts by weight of the bituminous substance such as asphalt or the artificial asphalt. The amount of the plastic polymer is in the range of 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 strength and 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 anionic or nonionic asphalt emulsion used as the binder in 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. Furthermore, for the purpose of adjusting the viscosity of the modified asphalt emulsion,
It is also possible to add a water-soluble polymer protective colloid such as MC, CMC, HEC, PVA, and gelatin.

The concentration of the evaporation residue (solid matter) in the anionic or nonionic asphalt emulsion used as the binder in the present invention is usually preferably about 30 to 74% 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 if the concentration of the evaporation residue exceeds 74% by weight. Although this is not to say that it cannot be used at all, it tends to be difficult to ensure good workability.

The anionic or nonionic asphalt emulsion used in the present invention may contain an ultraviolet absorber, various additives such as an ultraviolet absorber for the purpose of improving heat resistance, preventing deterioration due to ultraviolet rays and the like, improving workability, and improving adhesion. Additives, viscosity modifiers,
An anti-stripping agent, a binder, an adhesion enhancer, and the like may be added.

The asphalt in the anionic or nonionic asphalt emulsion used in the present invention, in particular,
The artificial asphalt can be colored by appropriately adding an organic and / or inorganic pigment. For example, by using artificial asphalt colored in the same system as the aggregate used, the lightness of the aggregate can be further enhanced. Examples of the inorganic pigment used include the following pigments: white: titanium dioxide, zinc oxide, lead white black: iron black, graphite, carbon black red: cadmium red orange: molybdenum orange yellow: second hydroxide Iron, yellow oxide, graphite Green: chromium oxide, chrome green Blue: ultramarine, navy blue, cobalt blue Purple: manganese violet.

Examples of the organic pigments include red: watching red, quinacridone red, orange: permanent orange, yellow: fast yellow, green: phthalocyanine green, blue: phthalocyanine blue, and purple: dioxazine violet.

These pigments may be used alone or in combination of two or more. The amount of the pigment 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 Aid> As the decomposition aid used in the present invention, any one can be used as long as it can accelerate the decomposition of an anionic or nonionic asphalt emulsion used as a binder. When an anionic asphalt emulsion is used as a binder, divalent inorganic salts such as calcium chloride; inorganic acids such as hydrochloric acid, formic acid, and phosphoric acid; acetic acid, citric acid, and the like; Rosin amine, ethylene oxide adduct of amines, alkyl monoamine hydrochloride or acetate, alkyl diamine hydrochloride or acetate, alkyl amines such as alkyl triamine hydrochloride or acetate; diamide;
Hydrochloride or acetate of amidoamines such as amidoamine; hydrochloride or acetate of imidazolines such as polyaminoethylimidazoline; hydrochloride or acetate of alicyclic monoamine, diamine or triamine having a long-chain alkyl group; Hydrochloride or acetate of ethylene alkylamines; hydrochloride or acetate of aminated lignin; water-soluble or water-dispersible salt obtained by reacting an amine-based cationic surfactant with an acid such as hydrochloric acid, sulfamic acid, or acetic acid Hydrochlorides or acetates of amine oxides; and quaternary ammonium salts of amine-based cationic surfactants. One or more of these may be used as a decomposition aid. it can. Among them, it is preferable to use a water-soluble salt of an amine-based cationic surfactant such as alkyl monoamine hydrochloride or acetate, alkyl diamine hydrochloride or acetate, alkyl triamine hydrochloride or acetate. In addition, a nonionic surfactant such as exciethylene / oxypropylene block copolymer can be used together with these decomposition aids.

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

It is desirable that the above-mentioned decomposition aid is used in the form of an aqueous solution.
A range of 0 w / w% is good. If the concentration of the aqueous solution of the decomposition aid is less than 1.5 w / w%, the effect of accelerating the decomposition of the asphalt emulsion cannot be expected. If the concentration of the aqueous solution of the decomposition aid exceeds 20 w / w%, the decomposition of the asphalt emulsion is not performed. The speed will be 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 anionic or nonionic asphalt emulsion as the binder is based on 100 parts by weight of the evaporation residue in the anionic or nonionic asphalt emulsion. The amount of the active ingredient in the aqueous solution of the decomposition aid,
The range of 0.05 to 0.5 parts by weight is preferred. When the amount of the active ingredient in the aqueous solution of the decomposition aid is less than 0.05 part by weight, the effect of promoting the decomposition of the asphalt emulsion cannot be expected,
If the amount exceeds 0.5 parts by weight, the decomposition rate of the asphalt emulsion becomes too high, which hinders the construction work.

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

When the aggregate used in the present invention is coated with asphalt or artificial asphalt or the like, the amount of asphalt or artificial asphalt required for coating is 0.1 to 1.5 wt. %. In the case of porous aggregate such as steel slag,
In the non-porous aggregate such as hard sandstone, the amount is larger in the above range, and is smaller in the above range. Examples of the asphalt or artificial asphalt used for coating include the above-mentioned asphalt, asphalt emulsion, and modified asphalt and modified asphalt emulsion obtained by modifying these with rubber, polymer, and the like. Quality artificial asphalt, artificial asphalt emulsion, modified artificial asphalt emulsion and the like are also used. Further, aggregates 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, brilliancy, and fluorescence or luminous properties. For example, natural colored aggregates, artificially fired aggregates,
Fired foam aggregates, artificial lightweight aggregates, ceramic grains, luxovite, aluminum grains, plastic grains, ceramics,
If a colored material is used among emery and the like, it is possible to easily realize a color pavement which is strong and has excellent durability and stability. In addition, glass beads, silicon carbide particles, fused alumina-based artificial aggregate, limestone-based artificial aggregate (for example, Sinopearl), feldspar, quartz, aluminum silicofluoride, glass chips such as broken glass bottles, and fluorescent artificial aggregate If an aggregate having light reflectivity, brilliancy, or fluorescence or luminous property such as that described above is used, it is possible to easily realize a light reflective pavement, a brilliant or luminescent pavement. In addition, these colored, light-reflective, brilliant, fluorescent or luminous aggregates are usually used without a precoat, but when they are used after precoating, the aggregates originally have It is a matter of course that a material that does not impair colorability, light reflectivity, brilliancy, fluorescence, or light storage properties is used. It is also possible to apply a coating with colored asphalt, a fluorescent paint or a luminous paint to a normal aggregate to use it as a colored aggregate, a fluorescent aggregate or a luminous aggregate. In addition, one or more kinds of aggregates having different stone types, types, colors, etc., and / or one or more kinds of aggregates having different functions may be used in combination. An aggregate having a different function may be used for each.

Among 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 aperture.
If less than, the difference between the minimum particle size and the maximum particle size is 2mm or more in the nominal size of the sieve aperture, less than 5mm aggregate,
The minimum particle size is 10 mm in the nominal size of the sieve aperture.
In the above case, it is desirable that 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. Note that the term “nominal size of sieve opening” as used herein is a nominal size that is commonly used when expressing a sieve, and is a standard size of a mesh sieve opening specified in JIS Z8801. Are in a correspondence relationship as shown in Table 1.

[0054]

[Table 1]

That is, in this specification, the minimum size of the aggregate is less than 10 mm in the nominal size of the mesh of the sieve means that the standard size of the mesh of the mesh sieve specified in JIS Z8801 is 9.5. 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 opening, and the minimum particle size is 5 mm in the nominal size of the sieve opening, 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 for the lowermost layer as the surface treatment layer in the present invention are not particularly limited as long as the above-mentioned particle size conditions are satisfied. Preferably, the minimum particle size is 5 mm or more, and the maximum particle size is 20 m
m or less is preferable. If the minimum particle size is less than 5 mm,
The particle size of the aggregate is too small, and there is a possibility that unevenness and cracks on the road surface are not effectively covered. In addition, the spread thickness of the aggregate itself approaches the layer thickness of the binder scatter layer formed on the road surface by the scattered binder, and in some cases, the spread of the aggregate is greater than the layer thickness of the binder. The thickness becomes small, 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 running the vehicle increases,
Not only is the road surface after the construction roughened, but also the aggregate may be scattered when the vehicle runs on the surface treatment layer, which is not preferable.

The size of the aggregate used in the layers other than the lowermost layer is not particularly limited, but usually, an aggregate having a smaller diameter than the aggregate used in the lower layer is used. It is preferable to use fine aggregates such as fine sand, medium sand and coarse sand, and No. 7 crushed stone having a particle size of 2.5 to 5 mm.

The fine aggregate used in the present invention is 2.36 m.
m means that passes through a sieve, such as river sand, hill sand,
Mountain sand, screenings, crushed dust, silica sand,
Artificial aggregates, recycled aggregates, artificially fired aggregates, fired foamed aggregates, artificial lightweight aggregates, ceramic grains, luxovite, Sinopearl, aluminum grains, plastic grains, ceramics, emery, rubber powder grains, cork powder grains, wood powder One or more of particles, resin powder, pulp and the like can be used.

<Fibrous Material> In the spray surface treatment method of the present invention, the following fibrous materials can be used in order to strengthen the surface treatment layer to be constructed.
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, various types of fibers, such as metal fibers, are used. And polyester fibers are preferred.

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

The length of the short fiber is not particularly limited. However, if the length is too short, the surface treatment layer has no effect on maintaining the strength of the fiber by the fiber, waterproof performance and preventing cracking. It is preferably about 70 mm.

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 mixed. It is possible to construct a functional surface treatment layer which is excellent in durability and furthermore waterproof as well as being mixed and more strongly binding the aggregate to the road surface.

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

In the spray type surface treatment method of the present invention,
The binder and the decomposition aid are sprayed on the road at the same time or at the same time. When the binder and the decomposition aid are sprayed on the road surface one after another, 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, after the decomposition aid is first sprayed on the road surface, the binder may be sprayed on the spray surface. Also,
Further, after the binder and the decomposition aid are sprayed in this order, the binder may be sprayed again. Alternatively, after the decomposition aid and the binder are sprayed in this order, the decomposition aid may be spread again. The agent may be sprayed.

In any case, as a result of the binder and the decomposition aid being sprayed on the road surface one after another, the binder and the decomposition aid meet on the road surface, come into contact with each other, and are bound by the decomposition aid. The decomposition promoting action of the material is started, and the binder is decomposed and hardened in a shorter time than when the binder alone is used. As described above, according to the spraying surface treatment method of the present invention, since the method includes the step of spraying the binder and the decomposition aid on the road surface one after another, compared with the conventional spraying surface treatment method, It is possible to construct a spray-type surface treatment layer that is strong, durable, and excellent in stability with a shorter curing time.

However, in the spraying type surface treatment method of the present invention, as described below, the binder and the decomposition aid are sprayed on the road at the same time, and the two are colliding and contacting on the road. More preferably, by spraying the binder and the decomposition aid at the same time, and colliding and contacting them in the air, a spray-type surface treatment that is strong, durable, and excellent in stability with a shorter curing time. Layers can be built.

The reason is considered as follows. That is, as an example of dispersing the binder and the decomposition aid on the road surface one after another, as shown in FIG. 2, for example, as shown in FIG. Considering the case where the auxiliary agent 5 is sprayed, 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 come into contact with each other at the interface between the two layers and mix with each other, so that the decomposition aid 5 starts to promote the decomposition of the binder 2. As a result, a layer 6 in which the binder 2 is being decomposed and hardened is formed at the boundary between the layer of the binder 2 and the layer of the decomposition aid 5, and this layer 6 is formed. Conversely, further contact and mixing of the undecomposed binder 2 and the decomposition aid 5 are prevented, and furthermore, the dissipation of moisture from the layer of the binder 2 is prevented.
Therefore, it is considered that it is difficult to sufficiently mix the binder 2 and the decomposition aid 5 in a short time. The same applies to the case where the order of application of the binder 2 and the decomposition aid 5 is reversed. Although the curing time can be reduced to some extent by the presence of the agent, the advantage of using a decomposition aid cannot be said to be fully utilized.

On the other hand, when the binder and the decomposition aid are sprayed at the same time so that they collide with each other on the road surface, more preferably in the air, the binder and the decomposition aid can be used. The mixing with the agent is more uniform and complete, and the advantages of using the decomposition aid can be fully utilized. However, in this case as well, it is preferable that the binder and the decomposition aid be collided and contacted in the air, rather than being sprayed at the same time and both collided and contacted on the road surface. The reason is considered as follows. That is, even when the binder and the decomposition aid are sprayed at the same time and both collide and come into contact with each other on the road surface, a certain uniform mixing state can be realized. As soon as it reaches, it loses momentum and stops, so even if it is possible to realize a uniform mixing state of both, there is naturally a limit. However, if the binder and the decomposition aid collide and come into contact with each other in the air, they are still in motion even after the collision and contact, and before reaching the road surface, other binder particles and decomposition aid It is considered that a very uniform mixing state is realized by repeating collision and contact with the agent particles or the binder particles of the binder particles and the decomposition auxiliary agent particles.

The case where the binder and the decomposition aid are collided and brought into contact with each other in the air, and the two are impactfully 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 the decomposition aid spraying device used in the spraying surface treatment method of the present invention, wherein 1 is a road surface. Yes, 7 is a spray bar for spraying binder, 8-1,
Reference numerals 8-2, 8-3, ... denote spray nozzles attached to the spray bar 7 for spraying the binder. Also, 9
-1, 9-2, 9-3,... Are binders ejected from the respective spray nozzles. Spray nozzle 8-
Any type of spray nozzles may be used as 1, 8-2, 8-3,..., For example, a spray nozzle having a circular full-surface spray pattern, a square full-surface spray pattern However, from the viewpoint of achieving uniform spraying, a spray nozzle having a flat-shaped spray pattern as shown in FIG. 3 may be used. Is desirable. The flat spray pattern is a substantially linear spray pattern in which a cross section perpendicular to the spray direction is elongated in a fan shape at a certain spray angle α from a spray nozzle. The flat surface refers to the surface of a fan having a fan-shaped spray pattern.

FIG. 4 is a plan view of FIG. 3 as viewed from above. As shown in FIG.
-1, 8-2, 8-3,... Usually have a flat surface of the spray pattern of the sprayed binder 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,
Any number of times is possible as long as it is in the range of 0 to 90 degrees, but from the viewpoint of canceling non-uniformity by overlapping the spray patterns from the respective spray nozzles, usually 5 to 45 degrees, preferably 10 to 40 degrees. And more preferably in the range of 15 to 35 degrees. It is preferable that the mounting angle β of the spray nozzle is the same in one spray bar.

As shown in FIG. 3 and FIG. 4, the binders 9-1, 9-2, 9-3 sprayed from the spray nozzles 8-1, 8-2, 8-3,. Are partially overlapped with each other when viewed from a horizontal direction orthogonal to the longitudinal direction of the spray bar 7. For example, in the case of FIG. 3 and FIG. 4, each of the injected bonding materials 9-1, 9-2, 9-3,.
・ Overlap on the road surface 1 by 2/3 each other. Such a spray bar 7 and spray nozzles 8-1, 8-
The bonding material spraying device composed of 2, 8-3,... Is usually mounted on a work vehicle, and moves in a horizontal direction perpendicular 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, from point A, sequentially below the binders 9-4, 9-3, 9-2 sprayed from the spray nozzles 8-4, 8-3, 8-2. Will pass. Therefore, the point A is subjected to three times, that is, triple application. The overlapping number of the overlapping spraying is not limited to triple, and may be double or quadruple or more. It is preferable to spray. The amount of this spray is the height of the spray nozzle from the road surface,
It goes without saying that it can be adjusted as appropriate by adjusting the spray angle α from the spray nozzles, the interval between the spray nozzles, and the like.

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

FIG. 6 is a top view of the apparatus shown in FIG. 5. As shown in FIG. 6, in the apparatus used for the spraying type surface treatment method of the present invention, one spray nozzle for the binder is used. A single spray nozzle for the decomposition aid corresponds to, for example, the binder 9-1 sprayed from the spray nozzle 8-1 for the binder and the spray nozzle 11- for the decomposition aid. The decomposition aid 12-1 ejected from 1 collides in the air, and the binder 9-2 ejected from the spray nozzle 8-2 for the binder is sprayed from the spray nozzle 11-2 for the decomposition aid. The decomposition aid 12-2 collides in the air. The spray nozzles 8-1, 8-2,... For the binder, in which the injected binder or decomposition aid collides with each other in the air, and the spray nozzles 11-1, 11-2,. Is very strict, and the two correspond one-to-one. For example, the decomposition aid 12-2 sprayed from the spray nozzle 11-2 for the decomposition aid Only the binder 9-2 ejected from the material spray nozzle 8-2 collides in the air, and does not collide with the binder ejected from another spray nozzle for the binder.

Spray nozzles 8-1, 8-for binders in which the injected binder or decomposition aid collides with each other in the air
2,... And a spray nozzle 11-1 for a decomposition aid,
Such a one-to-one correspondence 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 injected decomposition aid 12-1 and the corresponding binder 9-1. The binder 9-2 ejected from the spray nozzle 8-2 for the binder that does not exist exists, but the ejected binder 9-2 is
For example, as shown in FIG. 3, because of the fan-shaped spread of the skirt, the injected decomposition aid 12-1 passes above the inclined flared shoulder of the binder 9-2 in front. Then, it suffices to collide with the bonding material 9-1. That is, in FIG. 3, when viewed from a horizontal direction orthogonal to the longitudinal direction of the spray bar 7, a horizontal line is formed from an intersection x between the right shoulder of the injected binder 9-1 and the left shoulder of the injected binder 9-2. 6 is shown as a line segment X, the decomposition aid 12-1 sprayed from the spray nozzle 11-1 for the decomposition aid in FIG. Line segment X at
If it passes at a higher position, the spray nozzle for the binder and the spray nozzle for the decomposition aid can correspond one to one. The binder spray nozzles 8-1, 8-2, 8-3,... And the spray nozzle for the decomposition aid such that the injected binder and the decomposition aid have such a positional relationship. 11-1, 11-2, 11
-3 ..., for example, the decomposition aid 12-3 sprayed from the spray nozzle 11-3 for the decomposition aid is combined with the spray sprayed from the spray nozzle 8-3 for the binder. Only the material 9-3 collides with the material 9-2 or 9-4 ejected from the spray nozzle 8-2 or 8-4 for the other adjacent material.

The spray nozzle 11 for the decomposition aid
Since the injection direction of the decomposition aid 12-1 from -1 is generally obliquely downward, the position at which the decomposition aid 12-1 passes over the binder 9-2 in front is slightly smaller than the line segment X. Even if the position is high, the binder 9-1 on the binder 9-1
The collision position between the 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 of the binder 9-1 and the decomposition aid 12-1 on the binder 9-1 is determined from the viewpoint of the device design. , It is preferable to be 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 with the decomposition aid to the fall on the road surface and loss of momentum is too short, and the If the mixture is too high, the injected binder and decomposition aid both collide with each other in a state of still being hardened, which is not preferable. Therefore, the height of the collision position Y is １ ／ H to 3 /
The range of 4H is preferable, and more preferably 2 / 4H to 3H.
/ 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,.・ By making the one-to-one correspondence, it becomes easy to control the collision ratio such as the quantitative ratio of the colliding binder and the decomposition aid, the collision speed, and the collision position. Can be made to collide at an optimal ratio and under optimal collision conditions. As a result, it is needless to say that extremely uniform mixing of both is realized, and a shorter curing time can be realized.

In the apparatus used in the spray type surface treatment method of the present invention, as shown in FIG.
2-1, 12-2, 12-3,... Are respectively directed toward the corresponding binders 9-1, 9-2, 9-3,. ,... Are sprayed so that the above spray density becomes uniform. That is, in the plan view of FIG. 6, the fan-shaped spray pattern of the decomposition aids 12-1, 12-2, 12-3,.
, 9-2, 9-3,... At an angle that is symmetrical about the vertical planes Z1, Z2, Z3,. −
Injected toward 2, 9-3, .... Accordingly, the injection density of the decomposition aids 12-1, 12-2, 12-3,... At each of the collision positions Y1, Y2, Y3,. .. Become 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 substantially perpendicularly to the road surface. Conversely, the decomposition aid is applied vertically to the road surface. Injection may be performed so that the binding material obliquely collides against the decomposition aid, and furthermore, both the binder and the decomposition aid may be obliquely ejected and collide. However, considering that the amount of the binder is larger and the main material, the decomposition aid obliquely collides with the binder injected substantially perpendicularly to the road surface as in the example described above. It is preferred that

In the spray type surface treatment method of the present invention,
The decomposition aid is desirably used in the form of an aqueous solution, and its concentration is usually preferably in the range of 1.5 to 20 w / w%.
If the concentration of the aqueous solution of the decomposition aid is less than 1.5 w / w%, the effect of promoting the decomposition of the anionic or nonionic asphalt emulsion as the binder cannot be expected, and the concentration of the aqueous solution of the decomposition aid will be 20 w / w. %, The decomposition rate of the anionic or nonionic asphalt emulsion becomes too high, which hinders the construction work.

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

The spray pressure from each spray nozzle is:
0.6 to 5.0 kgf / c for both binder and decomposition aid
preferably in the range of m ^2, preferably 1.0~2.5kg
f / cm ² . Injection pressure is 0.6kgf / c
If it is less than m ² , it is difficult for the ejection pattern to have a good fan shape, and if the ejection pressure exceeds 5 kgf / cm ² ,
The object to be jetted becomes mist-like, and it is difficult to form a good spray film on the road surface. Also, the injection pressure of the binder and the decomposition aid may be the same, but it is desirable that the injection pressure of the decomposition aid be set slightly higher than the injection pressure of the binder.

FIG. 7 shows a working vehicle used in the spraying surface treatment method of the present invention. In FIG. 7, reference numeral 13 denotes a working vehicle, 14a and 14b denote front and rear wheels of the working vehicle 13, respectively. 7 is a spray bar for a binder, 8 is a spray nozzle for a binder, 10 is a spray bar for a decomposition aid,
Reference numeral 11 denotes 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 are provided in the width direction of the working vehicle. Reference numeral 15 denotes an aggregate bin serving as an aggregate dispersing device. As the aggregate bottle, the above-mentioned Japanese Patent Application No. Hei 10-158 by the same applicant can be used.
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. 10-1777986 is used. The binder is carried in from a supply vehicle (not shown) through a carry-in socket denoted by reference numeral 16, is pressure-fed to a spray bar 7 for the binder by a transport pump 17, and is injected from a spray nozzle 8 toward a road surface. Spread on the road surface 1. On the other hand, reference numeral 18 denotes a decomposition auxiliary agent tank. The decomposition auxiliary agent is pressure-fed from the tank 18 to a spray bar 10 for decomposition auxiliary agent by a transport pump (not shown), and is sprayed from the spray nozzle 11 toward the binder 9. Is done. The spray nozzle 11 for the decomposition aid and the spray nozzle 8 for the binder are arranged so as to correspond one-to-one, and the decomposition aid sprayed from one spray nozzle is used for one spray. The material collides with the binder injected from the nozzle in the air, comes into contact with the material, and stirs and mixes with impact. 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 with reference to FIG. By adjusting the angle of the spray nozzle 11 for the decomposition aid with respect to the spray nozzle 8 for the binder, the binder and the decomposition aid can collide on the road surface or the decomposition aid can be applied on the surface of the binder. Needless to say, 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 binder is sprayed first after the decomposition aid 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. It is.

The aggregate is carried into an aggregate popper 19 from an aggregate transporter (not shown) and transported to a 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. Reference numeral 22 denotes an operation step, and reference numeral 23 denotes a heating device for heating the road surface.

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. The work vehicle 13 of No. 7 is provided with a device for dispersing or spreading a fiber material in addition to a device for dispersing a binder, a device for dissolving a decomposition aid, and a device for dispersing aggregate. That is, in FIG. 7, reference numeral 24 denotes a storage device for a fibrous material such as a monofilament, a multifilament, a spun yarn, a twisted yarn, and the stored fibrous material 25 is moved from a nozzle 26 in a random direction or in a fixed direction. It is designed to be injected. The fiber material storage device 24 can store the short fibers 27 together, and the short fibers 27 are also jetted from the jet nozzle 26. In the illustrated example, the fiber material is sprayed after the binder and the decomposition aid are sprayed on the road surface 1 from the spray nozzle 8 and the spray nozzle 11, respectively. It is also possible to make the distance between the spray nozzle 8 and the decomposition aid spray nozzle 11 and the injection nozzle 26 of the fiber material shorter so that the three are sprayed at the same time and mixed together in the air.

Although not shown in the figure, it is also possible to separately provide a nozzle for injecting a fiber material such as a monofilament, a multifilament, a spun yarn and a twisted yarn in the width direction of the working vehicle. By injecting the fiber material in the vehicle width direction of the work vehicle using the nozzles that are not used, and by injecting the fiber material from the injection nozzle 26 in parallel with the traveling direction of the work vehicle, the same or different fiber materials are orthogonal to each other on the road surface. It is also possible to deposit in a direction.

On the other hand, reference numeral 28 denotes a storage device for a sheet-like fiber material 29 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 30 and spread on the road surface. Reference numeral 31 denotes a pressing roller for bringing the fed sheet-like 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 , preferably 5
0 g / m ² to 120 g / m ² .

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

Next, the working procedure of the spray type surface treatment method of the present invention will be described.

First, after cleaning the construction road surface with a road sweeper, a binder and a decomposition aid are sprayed. As described above, it is desirable that the binder and the decomposition aid are sprayed so that the both collide with each other in the air. Prior to spraying the binder and the decomposition aid, water or a primer may be sprayed. In the case of the present invention in which an anionic or nonionic asphalt emulsion is used as a binder, for example, water is optionally used to enhance the adhesion or conformability between the anionic or nonionic asphalt emulsion and a road surface. It is sprayed and has the effect of lowering the elevated road surface temperature in summer. On the other hand, a primer is also sprayed as necessary for the purpose of enhancing the adhesiveness between the binder and the road surface and the conformability. The amount of the binder to be scattered is not particularly limited as long as the aggregate is bonded to the road surface.
Usually in the range of 100 m ² per 60 to 250 l is preferred. If the amount of binder per 100 m ² is less than 60 liters, there is a possibility that the bonding strength and adhesion between the road surface and the aggregate and between the aggregates and the aggregate may be insufficient. Cause. The amount of the binder to be applied varies according to the particle size of the aggregate. In general, the larger the aggregate having a larger particle size is, the larger the amount of the binder applied per layer becomes.

After spraying the binder and the decomposition aid, the aggregate is further sprayed on the mixed layer of the sprayed binder and the decomposition aid. The amount of the aggregate to be sprayed is preferably in the range of 0.4 to 2.5 m ³ per 100 m ² , usually per spray type surface treatment layer. If the amount of aggregate scattered per 100 m ² is less than 0.4 m ^3, it causes a flash phenomenon, and conversely, 100 m 2
^{If the} amount of aggregate per ² exceeds 2.5 m ³ , the surplus aggregate will not only block the traffic of vehicles due to floating stones but also make the road surface difficult for pedestrians to walk. In addition, it is desirable that the larger the aggregate size is, the more the aggregate is scattered. In addition, the aggregate is usually sprayed at normal temperature.
Spraying may be performed in a state of being heated to -170 ° C.

In the case of constructing only one spray type surface treatment layer, the spray surface of the aggregate is then pressed. As the rolling machine, for example, a self-propelled rolling machine such as a tire roller, an iron wheel roller, and a vibration roller can be used.

When the spray type surface treatment layer is constructed in two or more layers, a binder and a decomposition aid are further sprayed on the spray surface of the first aggregate, and then the aggregate is sprayed. The process may be repeated as many times as necessary. Aggregate to be sprayed on the upper layer, it is preferable to use those having a smaller particle size than those to be sprayed on the lower layer, and accordingly, the binder to be sprayed,
It is desirable to reduce the amount of the disintegration aid and the aggregate to be applied to the upper layer. When constructing the uppermost layer, a colored pavement can be easily realized by using a colored aggregate. In addition, if a light-reflective, bright or fluorescent aggregate is used, a light-reflective pavement or a fluorescent pavement can be easily constructed.

When the spray type surface treatment layer is constructed in two or more layers, the fibrous material may be sprayed simultaneously with or before and after the binder and the decomposition aid, when the appropriate layer is constructed. It is good, but when constructing a surface treatment layer having no particular problem 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, finishing is performed by rolling the spray surface of the aggregate for each layer. For the compaction, a self-propelled compacting machine such as a tire roller, an iron wheel roller, and a vibrating roller can be used in the same manner as in the case where only one spray type surface treatment layer is constructed. Only the aggregate may be sprayed on the uppermost layer without spraying the binder. Speaking of the aggregate used and the amount of spraying, for example, fine aggregate such as fine sand, medium sand, coarse sand and No. 7 crushed stone (particle size 5 to 2.5 mm) is thinned, for example, 0.1 to 0.4 ^(m 3 / 100m ²⁾
To some extent, it may be scattered on the aggregate sprayed earlier. Finally, the spraying surface is lightly compacted, the floating stone is removed by a road sweeper, and the spread surface is opened to traffic. In addition, an asphalt mixture or the like is spread over the surface treatment layer constructed by the spray surface treatment method of the present invention, and the surface treatment layer constructed by the spray surface treatment method of the present invention is used as a pressure layer. You may do it.

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

<Experiment 1> Influence of the characteristics of the binder on the bonding force with the road surface Table 2 shows the effect of the characteristics of the binder used on the durability of the constructed spray-type surface treatment layer. Seven kinds of anionic or nonionic asphalt emulsions having such various properties were prepared, and the adhesion test described below was performed according to the Vialit adhesion test method. Aggregate, minimum particle size 5mm, maximum particle size 8mm
Was prepared, dried and allowed to stand under the conditions specified in the Biarrite adhesion test method. On the other hand, as a decomposition aid, alkyldiamine acetate (trade name “Cation DT
A ", a 10% w / w aqueous solution of Nippon Yushi Co., Ltd.), and by weight ratio, (amount of active ingredient in aqueous solution of decomposition aid)
/ (Evaporation residue in asphalt emulsion) = 0.3 / 10
0 was set.

On the other hand, thickness 2 mm, size 200 × 200
mm metal plates were prepared by the number of samples, and each of the above seven kinds of anionic or nonionic asphalt emulsion separately prepared as a binder and the above-mentioned decomposition aid were used in the air using a flat spray nozzle. It was sprayed at a rate of 1.1 (liter / m ² ) while causing collision. The spray height H of the binder was 50 cm, and the collision position between the binder and the decomposition aid was 30 cm from the spray surface, that is, (3/5) H. Then, on the spraying surface of this binder and the decomposition aid,
After spraying 90 aggregates per metal plate, a linear pressure of 7
A load of kgf / cm was applied, and pressure was applied 15 times in opposite directions, for a total of 30 rotations. After allowing this to stand for 6 hours, with the aggregate attached side down and horizontally held,
An iron ball with a diameter of 50 mm and a weight of 500 g is placed on top of it.
Dropped to the center of the metal plate three times within seconds. The number of aggregate particles to which the binder was not adhered among the aggregate particles that had fallen off the metal plate due to the fall of the iron ball was counted as a. The aggregate remaining on the metal plate was peeled off by hand, and the number of aggregate particles to which no binder was attached was counted as d. The adhesion rate (%) was calculated as the adhesion rate (%) = {(90-ad) / 90} × 100. The test was performed three times for each sample, and the results were averaged, and those having an adhesion rate of 80% or more were evaluated as satisfactory. Further, samples were prepared by spraying aggregates on seven kinds of anionic or nonionic asphalt emulsions in the same procedure except that the decomposition aid was not sprayed, and a similar test was performed to determine the adhesion rate. Table 2 shows the results.

[0100]

[Table 2]

As is apparent from Table 2, when the binder and the decomposition aid collided in the air, the physical properties of the anionic or nonionic asphalt emulsion as the binder were changed.
The penetration of the evaporation residue is 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, and the tenacity of the evaporation residue at 25 ° C. 30kgfcm or more,
Satisfactory results with an adhesion of 80% or more were obtained. Also,
Penetration is 90-120 (1 / 10mm), softening point is 60
In asphalt emulsions D and E having a toughness of 100 to 200 kgf · cm and a tenacity of 70 to 180 kgf · cm, satisfactory results with an adhesion ratio of 90% or more were obtained, but emulsions having a softening point of 120 ° C or more were obtained. At F, the asphalt component obtained by decomposing the asphalt emulsion became somewhat softer, the waist decreased somewhat, and the adhesion rate tended to decrease slightly. The softening point is further increased, the softening point is 150 ° C., and the penetration is 20 (1/10 m
m), toughness is 250kgf ・ cm, tenacity is 2
In the asphalt emulsion G of 20 kgf · cm, the asphalt component obtained by decomposing the asphalt emulsion became soft, the waist became weak, and the adhesion rate was further reduced. On the other hand, almost the same results were obtained when the decomposition aid was not used, but the overall adhesion was lower than when the decomposition aid was used.

<Experiment 2> Effect of viscosity of binder on uniformity of surface treatment layer In order to investigate the effect of binder viscosity on uniformity of surface treatment layer, anion whose viscosity at 20 ° C. shows various values was examined. A system asphalt emulsion was prepared and sprayed at a rate of 1.2 (liter / m ² ) on an experimental pavement having an uneven surface, which was cut out for pavement replacement from a rutted road surface. Note that 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 compacted, and then cured until the binder hardened. After curing, the experimental pavement was cut with a cutter, and the thickness of the binder at the bottom of the concave portion and the top of the convex portion was measured. The results are shown in Table 3 together with the type of binder used.

[0103]

[Table 3]

As is evident from the results in Table 3, the binder having a viscosity of 19 centipoise and 32 centipoise at 20 ° C. tends to flow and stay in the concave portion of the road surface due to the effect of gravity after being sprayed. The average thickness of the binder at the top is about 0.65 mm or 0.77 m
m, and conversely, at the bottom of the recess on the road surface, on average, 1.
A thick binder layer having a thickness of 35 mm or 1.21 mm was formed. Aggregate particles at the protrusions could be relatively easily peeled off when attempting to peel off with the tip of a spatula. Further, in the concave portion, the amount of the binder is too large, and there is a risk that a flash phenomenon may occur when the concave portion is actually used for traffic of a vehicle.

On the other hand, when the 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 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 in the projections and depressions with the tip of the spatula, but they were so strongly bonded that they could not be easily peeled off. From the above, if a binder having a viscosity of about 40 centipoise or more at 20 ° C. is used as the binder, a uniform surface treatment layer can be constructed without the binder flowing on the road surface even if the road surface has irregularities. I understood.

<Experiment 3> Effect of the viscosity of the evaporation residue in the binder on the uniformity of the surface-treated layer In order to investigate the effect of the viscosity of the evaporation residue in the binder on the uniformity of the surface-treated layer, Binders having various values of absolute viscosity at ° C. were prepared, and 1.2 (liter / m 2) was placed on an experimental pavement having an uneven surface cut out for pavement replacement from a rutted road surface. Sprayed at the rate of ² ). The viscosity of the binder itself at 20 ° C. was about 40 centipoise, and the difference between the concave and convex portions on the experimental pavement 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 compacted, 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.

[0107]

[Table 4]

As is evident from the results in Table 4, the binder having an absolute viscosity of about 7000 poise and about 12,000 poise at 60 ° C. gradually flows with the lapse of time due to the action of gravity after being sprayed, and is formed in the concave portion of the road surface. It tends to stay, and the thickness of the binder is 0.64 mm at the top of the convex portion of the road surface.
On the other hand, a thick binder layer of 1.39 mm or 1.36 mm was formed at the bottom of the concave portion on the road surface. Aggregate particles at the protrusions could be relatively easily peeled off when attempting to peel off with the tip of a spatula. Further, in the concave portion, the amount of the binder is too large, and there is a risk that a flash phenomenon may occur when the concave portion is actually used for traffic of a vehicle.

On the other hand, the absolute viscosity at 60 ° C. is about 150
When it is more than 00 poise, the flow of the binder is suppressed, and there is not much difference in the thickness of the binder layer at the bottom of the road surface concave portion and the top of the convex portion. An attempt was made to peel off the aggregate particles in the projections and depressions with 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
It was found that if a material having a surface roughness of 000 poise or more was used, a uniform surface treatment layer could be constructed without the binder flowing over time on the road surface even if the road surface had irregularities.

<Experiment 4> Influence of the type of binder and the amount of decomposition aid used on the film formation time Anion-based asphalt emulsion (trade name "Sampisol A", manufactured by Nichireki Co., Ltd.) as a binder, decomposition aid The same one used in Experiment 1 was used while changing the amount of the active ingredient in the aqueous solution of the decomposition adjuvant to 100 parts by weight of the evaporation residue of the anionic asphalt emulsion at various ratios. In the same manner as in the above, the particles were collided in the air and sprayed on a 30 cm × 30 cm × 5 cm asphalt concrete plate. After spraying, at various curing times, it was observed whether or not the sprayed surface changed from brown to black to form a decomposition film of the anionic asphalt emulsion. Further, as a binder, a general-purpose asphalt emulsion pk-4 (manufactured by Nichireki Co., Ltd.) for tack coating was used, and in the same manner as described above, except that a decomposition aid was not used, the formation of a decomposition film on a spraying surface was performed in the same manner. The presence or absence was observed and used as a control.
The test temperature was 20 ° C.

The physical properties of the used binders are as follows. Anionic asphalt emulsion (trade name “Sanpysol A”, manufactured by Nichireki Co., Ltd.) Evaporation residue: 68 (%) Penetration of evaporation residue: 103 (1/10 mm) Softening point of evaporation residue: 65 (° C.) ) Toughness of the evaporation residue at 25 ° C: 160 (kgf
Cm) Tenacity of the evaporation residue at 25 ° C .: 145 (kg
f · cm) Absolute viscosity of evaporation residue at 60 ° C .: 16000 (poise) Viscosity at 20 ° C .: 42 (centipoise) General-purpose asphalt emulsion for tack coating pk-4 (manufactured by Nichireki Co., Ltd.) Evaporation residue: 51 (% ) Penetration of evaporation residue: 62 (1/10 mm) Softening point of evaporation residue: 46 (° C) Toughness of evaporation residue at 25 ° C: 35 (kgf ·
cm) Tenacity of the evaporation residue at 25 ° C .: 5 (kgf · cm)
cm) Absolute viscosity of evaporation residue at 60 ° C .: 2000 (Poise)

Table 5 shows the results. In Table 5, ○ indicates that film formation was observed, and X indicates that no film formation was observed.

[0113]

[Table 5]

As is clear from the results shown in Table 5, when the decomposition aid is used in an amount of 0.05% by weight or more of the effective component in the aqueous solution, based on 100 parts by weight of the evaporation residue of the anionic asphalt emulsion. Shows that the time until film formation is significantly shortened, and the decomposition and hardening of the asphalt emulsion are remarkably promoted. Further, a) to d) defined in the present invention.
The anionic asphalt emulsion that satisfies the characteristics of the above, compared with the conventional tack coat asphalt emulsion as a control, even when no decomposition aid is used, decomposition,
Curing time was short.

<Experiment 5> Effect of Type of Decomposition Aid on Film Forming Time and Adhesion As the binder, the same anionic asphalt emulsion as used in Experiment 4 (trade name "Sampisol A", Nichireki Co., Ltd.) ) And various types of decomposition aids were used.
Sprayed on a 30 cm × 30 cm × 5 cm asphalt concrete plate. After spraying, as in Experiment 4, at various curing times, it was observed whether or not the sprayed surface changed from brown to black to form a decomposed film of the asphalt emulsion. However, the evaporation residue of the used asphalt emulsion 1
The experiment was conducted with the amount of the active ingredient in the aqueous solution of the decomposition aid being fixed at 0.3 part by weight relative to 00 parts by weight. In addition, the same test was performed using only the binder without using the decomposition aid, and was used as a control.

At the same time, the effect of the difference of 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 used in the same combination as above, and the curing time was variously changed. Was. However, the experiment was conducted by fixing the amount of the active ingredient in the aqueous solution of the decomposition aid to 100 parts by weight of the evaporation residue of the asphalt emulsion used to be 0.3 part by weight. In addition, a similar test was carried out using only the binder without using the decomposition aid and used as a control. Table 6 also shows the results of observation of the presence or absence of film formation and the results of determination of the adhesion rate.

[0117]

[Table 6]

As is apparent from the results in Table 6, among the various decomposition aids tested, acetates of alkylamine surfactants such as alkylmonoamine acetate and alkyldiamine acetate, and alkyl quaternary ammonium salts were used. Salt,
The film formation time and the adhesiveness were both excellent, and among them, the alkyl diamine acetate was the most excellent.

<Experiment 6> Effect of spraying form of binder and decomposition aid on film formation time and adhesion rate As binder, the same anionic asphalt emulsion used in Experiment 4 (trade name "Sampisol A") , Manufactured by Nichireki Co., Ltd.)
10 w / of the same alkyl diamine acetate (trade name “Cation DTA”, manufactured by NOF Corporation) used in
Existence of film formation and adhesion rate at various curing times were examined in the same manner as in Experiment 5, except that the spraying form was variously changed using a w% aqueous solution. However, the experiment was conducted by fixing the amount of the active ingredient in the aqueous solution of the decomposition aid to 100 parts by weight of the evaporation residue of the anionic asphalt emulsion to 0.3 part by weight.

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

Table 7 shows the results.

[0122]

[Table 7]

As is clear from the results in Table 7, the binder and the decomposition aid are the same as those in (1) and (2), in which the binder and the decomposition aid are sprayed one after the other. The spraying modes (3) to (7), which are sprayed during the period, were superior in both the film formation time and the adhesion rate, but the binder and the decomposition aid collided on the spraying surface (3) Better results were obtained with the spraying modes (4) to (7), in which the binder and the decomposition aid were collided in the air, than the spraying mode (1). Further, among the spraying modes (4) to (7) in which the binder and the decomposition aid collide in the air, the collision height _HY is (1).
(5) and (6) which are (2/5) H and (3/5) H more than the case of (4) which is (/ 5) H or (7) which is (4/5) H. Is particularly superior, and the collision height is (１ ／) H to
It can be seen that the range of (3/4) H is good.

Further, for each sample for 30 minutes of curing time in which film formation was observed, a part of the film formation layer was broken at the tip of the spatula, and the internal state was examined. The interface between the binder and the decomposition aid formed 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 spraying form (2), the boundary surface between the binder and the decomposition aid formed a film, but water still remained on the road surface side portion of the decomposition aid. On the other hand, in the scattered samples (3) to (7), uniform film formation was observed.

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 The same anionic asphalt emulsion used in Experiment 3 (trade name “Sampisol A”, manufactured by Nichireki Co., Ltd.) was used as a binder in Experiment 1 as a decomposition aid. A 10 w / w% aqueous solution of the same alkyl diamine acetate (trade name “Cation DTA”, manufactured by NOF CORPORATION) was used, and the same aggregate used in Experiment 1 was used as the aggregate. Using a work vehicle having the form shown in FIG. 7, a spray-type surface treatment method was applied over a section of 3 m × 10 m on a test road surface. The construction is carried out at a speed of about 5 km / h while the binder and the decomposition aid are simultaneously sprayed, and the decomposition aid sprayed from one spray nozzle is bonded to the binder sprayed from one spray nozzle. And went so as to collide in the air. The height from the road surface to the spray nozzle of the binder is 50 cm, and the height of the binder is about 2/3 of the spraying height (about 33 c from the road surface).
The position and angle of each spray nozzle were adjusted so that the decomposition aid collides with the binder at a height of m. In addition,
The ratio of the decomposition aid used to the binder was 0.3 part by weight as an effective component in the aqueous solution of the decomposition aid based on 100 parts by weight of the evaporation residue of the anionic asphalt emulsion. Aggregate was sprayed immediately after the binder and the decomposition aid were sprayed. There was a rut with a maximum depth of about 15 mm on the construction road surface,
A uniform surface treatment layer could be constructed without the binder flowing. After the construction, after a curing period of 60 minutes,
After passing through a heavy-duty vehicle for 30 times, no scattering of aggregate was observed. Also, we tried to peel the aggregate with the tip of a spatula, but the aggregate was strongly bonded to the road surface,
It was difficult to peel off.

<Example 2> An anion-modified artificial asphalt emulsion in which a binder was separately prepared was used. As an aggregate, a light-colored aggregate having a particle size of 5 to 8 mm (green, trade name "Road Serum G", a Co., Ltd.)
In the same manner as in Example 1, a spray-type surface treatment method was applied. The properties of the modified artificial asphalt used were as follows. Anionic modified artificial asphalt emulsion ("Caraphalt EMA", manufactured by Nichireki Co., Ltd.) Evaporation residue: 68 (%) Penetration of evaporation residue: 90 (1/10 mm) Softening point of evaporation residue: 74 (° C.) ) Toughness of the evaporation residue at 25 ° C .: 170 (kgf
Cm) Tenacity of the evaporation residue at 25 ° C .: 155 (kg
f · cm) Absolute viscosity of evaporation residue at 60 ° C .: 19000 (poise) Viscosity at 20 ° C .: 60 (centipoise)

Although some cracks having a width of 5 mm or less existed on the construction road surface, they were completely covered by the constructed surface treatment layer. The constructed surface treatment layer was bright green, and after a 60-minute curing period after the construction, an attempt was made to peel off the aggregate grains at the tip of the driver, but it was strongly bonded to the road surface. In addition, 30 heavily loaded vehicles were tested.
After passing twice, no scattering of aggregate was observed.

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

The constructed surface treatment layer is uniform.
After a curing period of 60 minutes, the driver attempted to remove the aggregate grains at the tip of the driver, but found that it was quite strongly bonded to the road surface. Further, when the vehicle was passed through a heavy load vehicle 30 times in a test, no scattering of the aggregate was observed.

[0131]

As described above, the spray-type surface treatment method of the present invention uses an anionic or nonionic asphalt emulsion having specific characteristics as a binder and uses a decomposition aid, so that the anionic or nonionic asphalt emulsion is used. The decomposition and hardening time of the nonionic asphalt emulsion is reduced, and a strong and durable stable surface treatment layer can be constructed with a short curing time. In particular, the decomposition aid sprayed from one spray nozzle is sprayed from one spray nozzle so that the anionic or nonionic asphalt emulsion as a binder and the decomposition aid collide in the air. Spraying the binder so that it collides in the air, the mixture of the binder and the decomposition aid becomes more uniform, and in a very short time, a surface treatment layer with excellent durability and strength is constructed. It is possible to do.

Further, as the binder, the residue of evaporation at 60 ° C.
When using the absolute viscosity of about 15000 poise or more, even if there is unevenness or slope on the construction road surface, the sprayed binder does not flow indiscriminately,
It is possible to construct a uniform and highly durable surface treatment layer without excess or shortage of the binder depending on the location. Furthermore, simultaneously with or before or after the binder and the decomposition aid, by spraying or spreading the fiber material, it is possible to construct a surface treatment layer having not only durability but also excellent waterproofness. .

The spray-type surface treatment method of the present invention can be applied to a surface treatment layer constructed by using a specific work vehicle as disclosed in the present specification to achieve more uniformity, durability and stability. As a result, it is a very useful and excellent invention together with the pavement of the present invention having the surface treatment layer to be constructed. In addition, according to the spray surface treatment method of the present invention, by selecting an aggregate to be used and using a colored one, color pavement can be realized extremely easily. Furthermore, since the spray type surface treatment method of the present invention uses an anionic or nonionic asphalt emulsion as a binder, it can be applied at room temperature, does not generate carbon dioxide gas due to heating of the material, and is environmentally friendly. It is also an excellent construction method. The present invention exerts excellent effects not only on repairing an existing road surface but also on a newly-constructed road surface, and brings new possibilities to the technical field.

[Brief description of the drawings]

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

FIG. 2 is a view showing a state in which a binder and a decomposition aid are applied one after another.

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

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road surface 2 Binder 3 Aggregate 4 Aggregate scattered 5 Decomposition aid 6 Hardening layer 7, 10 Spray bar 8, 11 Spray nozzle 9 Injected binder 12 Injected decomposition aid 13 Work vehicle 14a , 14b front and rear wheels of the work vehicle 15 aggregate bin 16 carry-in socket 17 transport pump 18 decomposition aid tank 19 aggregate hopper 20 transport conveyor 21 push roller 22 work step 23 heating device 24 fiber material storage device 25 fiber material 26 nozzle 27 Short Fiber 28 Sheet Fiber Material Storage Device 29 Sheet Fiber Material 30 Feeding Device 31 Pressing Roller α Spray Nozzle Spray Angle β Spray Nozzle Mounting Angle

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D051 AA08 AE01 AF01 AG01 AH05 EA01 EA06 EB06 2D052 AA04 AA08 AA09 AC01 BA20

Claims (18)

[Claims] 1. A binder comprising an anionic or nonionic asphalt emulsion having the following characteristics a) to d) and a decomposition aid for accelerating the decomposition thereof are sprayed at the same time or before or after the same time. And a step of spraying aggregates; a) a spraying type surface treatment method comprising: a) a penetration of evaporation residue of 50 to 150 (1/10 m);
m), b) the softening point of the evaporation residue is 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 to 2
00 kgf · cm. 2. An anionic or non-ionic asphalt emulsion as a binder, further comprising: e) an evaporation residue having an absolute viscosity at 60 ° C. of about 1500
The spraying type surface treatment method according to claim 1, which has a characteristic of 0 poise or more. 3. The spray-type surface treatment method according to claim 1, wherein the viscosity at 20 ° C. of the anionic or nonionic asphalt emulsion as the binder is about 40 centipoise or more. 4. The binder is an anionic asphalt emulsion, and the decomposition aid is one or two selected from the group consisting of a divalent inorganic salt, an inorganic acid, an organic acid, and an amine cationic surfactant. Claim 1 which is the above decomposition aid.
4. The spray-type surface treatment method according to 2 or 3. 5. The sprayable surface according to claim 1, wherein the binder is a nonionic asphalt emulsion, and the decomposition aid is one or more decomposition aids selected from polymer flocculants. Processing method. 6. A decomposition aid having a concentration of 1.5 to 20% w / w.
The spray-type surface treatment method according to claim 1, 2, 3, 4, or 5, which is in the form of an aqueous solution. 7. The method according to claim 1, wherein the decomposition aid is an evaporation residue of the binder.
The spray-type surface treatment method according to claim 1, 2, 3, 4, 5, or 6, wherein 0.05 to 0.5 parts by weight of the active ingredient is applied to 0 parts by weight. 8. The method according to claim 1, wherein the binder and the decomposition aid are sprayed at the same time, and the two are collided in the air.
The spraying type surface treatment method according to 5, 6 or 7. 9. Spraying the binder and the decomposition aid using one or more spray nozzles, respectively, wherein the binder is sprayed from one spray nozzle and the decomposition aid is sprayed from one spray nozzle. The spraying type surface treatment method according to claim 8, wherein the agent is caused to collide with the agent in the air. 10. The spread width of the decomposition aid sprayed from each spray nozzle at the collision position substantially coincides with the spread width of the binder injected from the corresponding spray nozzle as the collision partner at the collision position. A spray-type surface treatment method according to claim 9. 11. The spraying device according to claim 9, wherein the injection density of the decomposition aid sprayed from each spray nozzle at the collision position with the binder is substantially uniform over the entire spread width at the collision position. Spray type surface treatment method. 12. The spray-type surface treatment method according to claim 1, wherein the step of spraying the binder and the decomposition aid and spraying the aggregate on the spray surface is repeated once or twice or more. . 13. Using a work vehicle equipped with at least a binder spraying device, a decomposition aid spraying device, and an aggregate spraying device, at a substantially constant time interval after the binder and the decomposition aid spraying. The spray-type surface treatment method according to any one of claims 1 to 12, wherein the aggregate is sprayed. 14. A pavement constructed by the spray-type surface treatment method according to claim 1. Description: 15. 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.
One or two or more spray nozzles for injecting a binder and one or more spraying decomposers so that the decomposition aid ejected from the spray nozzles of the above collide with the binder ejected from the one spray nozzle in the air. A work vehicle in which two or more spray nozzles are arranged. 16. The binder is sprayed so that the injection density of the decomposition aid sprayed from the individual spray nozzles at the collision location with the binder is substantially uniform over the entire spread width at the collision location. The work vehicle according to claim 15, wherein the work vehicle is provided with one or more spray nozzles for spraying and one or more spray nozzles for spraying a decomposition aid. 17. The work vehicle according to claim 15, further comprising an aggregate spraying device. 18. The dispersing device for a binder, the dispersing device for a decomposition aid, and the dispersing device for aggregate are arranged so that a tire or a crawler of a work vehicle is not located therebetween. The working vehicle described.