JP2002138413A - Method for repairing sidewalk pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for repairing sidewalk pavement, which can be executed simply at a low cost while having no joint and excellent flatness and has superior road-surface drainage properties and can construct a paved non-slip surface, and a paved layer obtained by the repairing method. SOLUTION: The method for repairing the sidewalk pavement containing a process in which an asphalt mixture is paved on a road surface, a process in which aggregate is scattered on the paved surface of the asphalt mixture, and a process in which a protective layer covering an aggregate layer is formed by scattering or applying a binder onto scattered aggregate and constructing the paved layer in which an asphalt mixture, the aggregate layer and the protective layer are unified is provided while the paved layer built by the such method for repairing the sidewalk pavement is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a sidewalk pavement, and more particularly, to a method for repairing a sidewalk pavement which is rich in slip resistance, has good road drainage, and is excellent in flatness. The present invention relates to a repair method and a pavement layer constructed by the repair method.

[0002]

2. Description of the Related Art In recent years, on the sidewalks, burial works such as gas pipes, water and sewage pipes, telephone lines, etc., digging of sidewalk pavements due to accidents and breakdowns, and restoration works have increased.
In addition to these constructions, especially in the downtown area that is the center of the city, shopping streets, sightseeing spots, sidewalks leading to historic sites, etc. When it comes, it is necessary to repair the sidewalk pavement as soon as possible in view of the landscape. In such a case, the block pavement is often performed at the time of repair because the landscape is excellent. The block pavement is characterized in that by selecting a block, characters and patterns can be freely added to the sidewalk and colors can be freely added, and road surface drainage is also good.

However, since block pavement is basically a pavement method in which blocks are arranged on a road surface, joints always exist, and steps, unevenness, gaps, and the like often occur in joints. There are drawbacks in that the heels and the like cannot be removed because they enter the gap between the joints, and that a slight step or unevenness gives an unpleasant vibration to a stroller, a shopping car, or the like passing thereover.
Also, depending on the type of block, if the surface becomes wet due to rainfall or the like, it becomes slippery, and this has a danger of falling.

[0004]

SUMMARY OF THE INVENTION The present invention eliminates the various drawbacks of block pavement, which is one of the conventional methods for repairing sidewalk pavement, as described above. An object of the present invention is to provide a method for repairing a sidewalk pavement capable of constructing a pavement surface that is excellent in flatness, has good road drainage properties, and is hard to slip, and a pavement layer obtained by the repair method. It is.

[0005]

SUMMARY OF THE INVENTION The present inventors have conducted research on a method for repairing a sidewalk pavement. As a result, the present inventors have surprisingly found that a combination of asphalt mixture pavement, aggregate application, and formation of a protective layer is combined. In particular, the present inventors have found that a pavement layer having excellent flatness and good drainage on the road surface and having less slippage can be easily and inexpensively applied, and the present invention has been completed.

That is, the present invention provides a process of paving an asphalt mixture on a road surface, a process of spraying aggregate on a paved surface of the asphalt mixture, and a process of spraying or applying a binder on the sprayed aggregate. Forming a protective layer that covers the aggregate layer by performing the method, wherein a pavement layer in which the asphalt mixture layer, the aggregate layer, and the protective layer are integrated is constructed to provide a method for repairing a sidewalk pavement. In addition, the object is solved by providing a pavement layer constructed by such a sidewalk pavement repairing method.

As described above, the method for repairing a sidewalk pavement according to the present invention performs pavement of an asphalt mixture, dispersion of an aggregate, and formation of a protective layer as a series of steps. It is characterized by constructing a pavement layer in which the layers are integrated. In the method for repairing a sidewalk pavement of the present invention, cracks and irregularities existing on the surface of the existing sidewalk pavement to be repaired are first sealed by the asphalt mixture, and are unevenly rectified. Even when cracks, irregularities, and the like are present, they can be effectively sealed or leveled. On the other hand, on the paved asphalt mixture layer, the aggregate is sprayed, and further, a protective layer is formed.On the asphalt mixture layer, an aggregate layer and a protective layer integrated with the asphalt mixture layer are formed. The pavement layer to be constructed is provided with an anti-slip function by the aggregate layer integrated with the asphalt mixture layer, and the presence of the protective layer prevents the dispersion of the aggregate having a relatively small particle size. Even when water is present, rainwater flows between the aggregates of the aggregate layer integrated with the asphalt mixture layer according to the gradient of the road surface, so that good road surface drainage and slip resistance can be obtained over a long period of time. It is possible to maintain. Moreover, since the asphalt mixture is paved, the aggregate is sprinkled on the asphalt mixture, and the protective layer is further formed. Therefore, there is basically no joint and the flatness is excellent.

In the method for repairing sidewalk pavement of the present invention,
Although the particle size of the aggregate to be sprayed is not particularly limited, it is inconvenient for the aggregate to have a too large particle size from the viewpoint of maintaining a good flatness while exhibiting a non-slip effect, and is preferably It is preferable to use an aggregate having a particle size of 3 mm or less, more preferably, a particle size of 2.5 mm or less, and still more preferably, a particle size of 2 mm or less.
The aggregate is desirably pre-coated with a bituminous material or the like.

In the method for repairing a sidewalk pavement according to the present invention, the step of spraying the aggregate is performed before the paved asphalt mixture has been completely hardened, and then the paved asphalt mixture is not yet cured. It is desirable to include a step of compacting the dispersed surface of the aggregate before completely hardening and partially embedding the aggregate in the asphalt mixture layer, whereby the asphalt mixture layer and the aggregate layer Becomes stronger, and a more durable pavement layer can be constructed.

On the other hand, as the binder forming the protective layer in the present invention, any material can be used as long as it can cover the surface of the aggregate and can integrate the aggregate and the asphalt mixture. For example, asphalt emulsion, pavement tar, bituminous material such as cutback asphalt, artificial asphalt obtained by blending a petroleum-based compounded oil and a tackifier in a predetermined ratio, or modifying this artificial asphalt Artificial asphalt emulsion obtained by emulsification, modified artificial asphalt, modified artificial asphalt emulsion, epoxy resin, polyurethane resin, modified epoxy resin, modified polyurethane resin, polyester resin, methacrylate resin, polyurethane modified acrylate resin, poly Emulsion polymerization of resin-based materials such as acrylate resin and these resin-based materials Latex and the like can be used, but from the viewpoint of giving a beautiful appearance to the pavement layer to be constructed, artificial asphalt and modified artificial asphalt, and artificial asphalt such as artificial asphalt emulsion and modified artificial asphalt emulsion It is desirable to use a system-based binder, or a resin-based material, among which artificial asphalt emulsion and modified artificial asphalt emulsion, and even a latex of a resin-based material, without the need for heating,
It is preferable because the construction is simple. In addition, the asphalt emulsion and the artificial asphalt emulsion referred to in this specification include a modified asphalt emulsion and a modified artificial asphalt emulsion unless otherwise specified.

As described above, the present invention is to construct a pavement layer in a sidewalk pavement in which an asphalt mixture layer, an aggregate layer and a protective layer are integrated on a surface to be repaired. Since the asphalt mixture layer, the aggregate layer and the protective layer are integrated in the pavement layer to be constructed, cracks and irregularities existing on the surface to be repaired by the asphalt mixture layer are effectively sealed, and The land can be leveled, and the aggregate layer effectively drains rainwater, etc., between the aggregates, provides good road surface drainage, provides slip resistance, and protects the protective layer. The presence prevents the aggregate having a relatively small particle size from scattering, so that it is possible to maintain good road surface drainage and slip resistance over a long period of time. Moreover, since there is no joint, the flatness is excellent.

In the present invention, the surface to be repaired of the sidewalk pavement may be the pavement surface of the existing sidewalk pavement itself, or may be pretreated by partially filling a large crack or a pothole. May be applied,
Further, the surface may be exposed by partially cutting and removing the existing pavement from the surface, and the present invention includes any of those surfaces. In the present invention, the sidewalk pavement mainly means all pavements where pedestrians are expected to pass. For example, not only sidewalks associated with roads such as general roads, but also promenades, bicycle paths, and parks Walking paths, bicycle parking lots, open spaces attached to large buildings such as public halls and gymnasiums, as well as communication passages between buildings, floors and passageways at work sites, stairs and landings accompanying buildings, stores, etc. Etc. are also targeted. In addition, the repair method of the sidewalk pavement of the present invention is not only repair,
The present invention can also be applied to the case where a sidewalk pavement is newly constructed, and the term “road surface” includes both a surface on which the sidewalk pavement is to be repaired and a surface on which the sidewalk pavement is to be constructed.

[0013]

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

First, the materials used will be described. <Asphalt mixture> The asphalt mixture used in the present invention may be a heated type or a normal temperature type, and the particle size may be any of coarse, dense, and fine particle sizes. It is preferable to use a heated dense-grained asphalt mixture from the viewpoint that it is inexpensive and can be obtained stably.

<Aggregate> The aggregate to be scattered on the binder in the present invention is any kind of aggregate for pavement described in “Asphalt Pavement Outline” issued by the Japan Road Association. What is used can also be used, for example, crushed stone, cobblestone, gravel, steel slag, and the like. However, in order to impart high slip resistance to the pavement layer, the use of hard aggregates is desired. Examples of hard aggregates include artificial black hard aggregates such as emery, ferrochrome slag and fused alumina, and carbonized hard aggregates. Examples thereof include silicon-based hard aggregates, ceramics, silica sand, and hard sandstone, and one or more of these may be used in combination. Further, asphalt-coated aggregates obtained by coating these aggregates with asphalt, recycled aggregates, and the like can also be used. In addition, artificially fired aggregates, fired foamed aggregates, artificial lightweight aggregates, ceramic particles, luxovite, aluminum particles, plastic particles, and the like can be used as similar granular materials.

When the aggregate used in the present invention is coated with asphalt or the like, the amount of asphalt required for coating is in the range of about 0.1 to 1.5% by weight. In the case of porous aggregate, the amount is larger in the above range, and in the case of non-porous aggregate, the amount is smaller in the above range. Asphalt and the like used for coating include asphalt, asphalt emulsion, and modified asphalt and modified asphalt emulsion obtained by modifying these with rubber or polymer. Also, aggregates spray-coated with kerosene or the like may be used. In the case of using asphalt-coated aggregate in which asphalt is coated on the aggregate, there is an advantage that the affinity between the aggregate and the asphalt mixture layer and the binder is improved, and stronger integration can be realized.

As the aggregate used in the present invention, it is also possible to use colored aggregates having various colors, for example, natural colored aggregates, artificially fired aggregates, and fired foamed aggregates. If a colored material is used among materials, artificial lightweight aggregates, ceramic particles, luxite, aluminum particles, plastic particles, ceramics, emery and the like, a colored pavement layer can be easily realized. Further, one kind or two or more kinds of aggregates having different stone qualities, types, and colors may be used in combination. In addition, these colored aggregates are usually used without a pre-coat, but when used by pre-coating, it is a matter of course to use a material which does not impair the colored properties inherent in the aggregates. is there. In addition, if an aggregate having properties such as reflectivity, brilliancy, fluorescence, or luminous property is used as the aggregate, a pavement layer having properties such as reflectivity, brilliancy, fluorescence, or luminous property can be formed. It can be easily constructed. Ordinary aggregates may be coated with colored asphalt, fluorescent paint, or luminous paint to be used as colored aggregates, fluorescent aggregates, or luminous aggregates.

The particle size of the aggregate to be sprayed in the present invention is not particularly limited, but it is preferable that the particle size is 3 mm or less, preferably 2.5 mm or less, more preferably 2 mm or less.
It is as follows. It does not mean that aggregates with a particle size exceeding 3 mm cannot be used, but shopping carts and strollers,
Vibration given to pedestrians such as wheelchairs increases,
This is not preferable because it not only gives discomfort but also may damage or destroy the articles and the like placed thereon due to vibration. On the other hand, the particle size of the aggregate is desirably 1 mm or more. If the particle size of the aggregate is less than 1 mm, slip resistance is poor and good road surface drainage may not be secured.

<Binder> As a binder used for forming the protective layer, an aggregate is bonded onto an asphalt mixture layer, and the asphalt mixture layer and the aggregate layer are integrated to function as a protective layer. Any material may be used, for example, a bituminous material such as asphalt emulsion, pavement tar, cutback asphalt, or a petroleum-based blended oil and a tackifier obtained by blending in a predetermined ratio. Artificial asphalt or artificial asphalt emulsion obtained by modifying or emulsifying this artificial asphalt, modified artificial asphalt, modified artificial asphalt emulsion, epoxy resin, polyurethane resin, modified epoxy resin, modified polyurethane resin, Polyester resin, methacrylate resin, polyurethane modified acrylate resin, polyacrylate resin, etc. And fat-based material, and the like can be used those latex resin-based material obtained by emulsion polymerization. Any of the binders described above can be used for forming the protective layer in the present invention.However, in terms of good compatibility with the asphalt mixture layer, it is preferable to use a bituminous material. Is most preferable because it is easy to spray, there is no need for heating, there is no danger, and no carbon dioxide gas is generated. However, when a colored aggregate is used, it is preferable to use a substantially colorless artificial asphalt emulsion or a latex of a resin material because the color of the aggregate is not impaired.
Hereinafter, description will be made sequentially.

<Asphalt Emulsion> The asphalt emulsion used in the present invention includes natural asphalt such as lake asphalt, straight asphalt, blown asphalt, semi-blown asphalt, and petroleum asphalt such as solvent deasphalted asphalt (for example, propane deasphalted asphalt). , Heavy oil, tar, pitch, etc., or a mixture of two or more kinds of bitumens, using various surfactants or emulsifiers such as clay (eg, bentonite), and further, alkalis, acids, salts, dispersants, Protective colloid and the like are added as needed, and emulsified in water by a suitable emulsifier such as a colloid mill, a homogenizer, and a homomixer.

As the emulsifier, any of a cationic, anionic or nonionic emulsifier can be used. As the cationic emulsifier usable in the present invention, an aliphatic or alicyclic monoamine having a long-chain alkyl group can be used. , Diamine, triamine, amidoamine, polyaminoethylimidazoline, long-chain hydroxyalkyldiamine, rosinamine, ethylene oxide adducts of these amines, amine oxide, or acids such as hydrochloric acid, sulfamic acid, acetic acid, etc. And water-soluble or water-dispersible salts, and quaternary ammonium salts of these amine surfactants. Also,
Nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl allyl ethers, and oxyethylene / oxypropylene block copolymers can be used in combination with these surfactants.

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

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

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

The asphalt emulsion used in the present invention is used as a modified asphalt emulsion obtained by adding one or more selected from rubber and a thermoplastic polymer to the above-mentioned emulsified and dispersed bituminous material. It is desirable to do.
The modified asphalt emulsion may be prepared by modifying the asphalt emulsion by adding one or more selected from rubber and a thermoplastic polymer, or may be prepared by modifying the asphalt with a rubber and a thermoplastic high polymer. After adding and modifying one or more selected from molecular polymers,
It may be prepared by emulsifying this to form a modified asphalt emulsion.

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, powdery, latex, emulsion, and water-based, and latex, emulsion, and water-based are mainly obtained by a post-mix type method. It is used exclusively for modified asphalt emulsions, but may be used for modified asphalt emulsions by a premix type method.

The asphalt emulsion used in the present invention contains a modified asphalt emulsion as described above.
These asphalt emulsions may further contain, as a tackifier, a thermoplastic solid resin, a solid rubber, a liquid resin, a softener, a plasticizer, and the like. 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, Polybutadiene, polybutene,
Copolymers of isobutylene and butadiene, mineral oil, process oil, pine oil, anthracene oil, pine oil, animal and vegetable oils, polymerization 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, M
It is also possible to add a water-soluble polymer protective colloid such as C, CMC, HEC, PVA, and gelatin.

The mixing ratio of the asphalt in the modified asphalt emulsion to the rubber and the thermoplastic polymer is preferably 2 to 20 parts by weight of the rubber and the thermoplastic polymer per 100 parts by weight of the asphalt. Ranges from 3 to 7 parts by weight. When the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the effect of adding the rubber and the thermoplastic polymer to the adhesive force and the grasping power to the aggregate after the modified asphalt emulsion is decomposed and cured is reduced. In contrast, when the amount of the rubber and the thermoplastic polymer exceeds 20 parts by weight, the cohesive force is too strong, and the aggregate is separated from the aggregate, causing the aggregate to scatter. easy.

The asphalt emulsion or the modified asphalt emulsion as described above is used for the purpose of improving heat resistance, preventing deterioration due to ultraviolet rays or the like, improving workability, and improving adhesion.
You may add an ultraviolet absorber, various additives, a viscosity modifier, a film-forming auxiliary agent, etc.

<Artificial Asphalt Emulsion> The artificial asphalt emulsion used in the construction of the protective layer in the present invention is an emulsion obtained by emulsifying artificial asphalt. Here, the artificial asphalt is preferably a petroleum-based asphalt. The blended oil and / or lubricating oil and the tackifier resin are mixed in a weight percentage of petroleum-based blended oil and / or lubricating oil: tackifier resin =
(60-85%): It is blended at a ratio of (40-15%). Either one of the petroleum compound oil and the lubricating oil may be used, or both may be used in combination. Therefore, the amount of the petroleum-based compounded oil and / or the lubricating oil indicates the amount of either one when only one of them is used, and the total amount of both when both are used. It will be. If the ratio of the petroleum compound oil and / or lubricating oil is less than 60% by weight, the viscosity of the obtained binder will be too high, and the workability will be reduced. On the other hand, when the proportion of the petroleum compound oil and / or the lubricating oil exceeds 85% by weight, the viscosity is lowered, but the adhesiveness and tackiness are undesirably lowered. Artificial asphalt obtained by such a formulation,
It is substantially colorless and does not impair the original color tone of the aggregate even when used with colored aggregates, for example, and the original color tone of the aggregate is fully exhibited.

The petroleum blended oil used in the preparation of the artificial asphalt is also called a process oil, and has an aromatic carbon number 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 at least 35%. 30-45% of naphthenic,
Also, there is a paraffinic system in which the number of carbon atoms in the paraffin side chain is 50% or more of the total number of carbon atoms. In the present invention, one or more of these are appropriately used.

Examples of the lubricating oil used for preparing the artificial asphalt include petroleum-based lubricating oils, synthetic lubricating oils, and fatty oils, and one or more of these can be used as appropriate. Most preferably, oil is used.

The petroleum-based lubricating oil is a heavy oil having a boiling point of about 300 ° C. or higher, which is obtained as a distillation residual oil obtained by atmospheric distillation of crude oil, is separated into various spilled oils and residual oils by vacuum distillation. Appropriate refining treatments such as wax, sulfuric acid treatment, solvent extraction, deasphalting, clay treatment, etc. are performed to finish the final product.

The synthetic lubricating oil is a lubricating oil produced by an organic synthesis method, and is generally classified according to its use. For example, spindle oil, compressor oil, dynamo oil, turbine oil, machine oil, engine oil, cylinder oil, jet oil Examples include engine oil and hydraulic oil.

Fatty oil is mainly mixed with petroleum-based lubricating oil and used as a hybrid lubricating oil for applications requiring oiliness or emulsifying property.

As the tackifier resin used in the preparation of the artificial asphalt, any of a natural resin and a synthetic resin can be used. A natural resin is a terpene resin, and a synthetic resin is a terpene resin. It is preferable to use a polymer resin such as a petroleum resin, a cumarone / indene resin, and a styrene resin, and more preferably, one of synthetic resins.
It is good to use the seed petroleum resin. The petroleum resin has a boiling point of 2 which is separated by distillation of naphtha decomposition products.
Aliphatic (C5) petroleum resin mainly composed of a fraction (C5 fraction) of 0 to 60 ° C, and a fraction having a boiling point of 160 to 260 ° C (C9 fraction) separated by distillation of naphtha decomposition product (C9) petroleum resin whose main component is an aliphatic / aromatic copolymer (C5 / C9) petroleum resin obtained by copolymerizing these C5 and C9 petroleum resins, and mainly An alicyclic system (DCPD) mainly composed of high-purity dicyclopentadiene separated by distillation of a naphtha decomposition product
System) There are petroleum resins, terpene phenol resins obtained by copolymerizing terpenes and phenols, and one or more of these are used in the present invention.

The artificial asphalt used in the preparation of the artificial asphalt emulsion in the present invention is modified with a rubber or a thermoplastic polymer to form a modified artificial asphalt like ordinary asphalt, and has a bonding force or an adhesive force. It is desirable to increase The modification may be performed before making the emulsion,
It may be carried out after forming an emulsion. Examples of the rubber and the thermoplastic polymer used for the modification include the same rubber and thermoplastic polymer used for the above-mentioned asphalt emulsion.

The mixing ratio of the artificial asphalt in the modified artificial asphalt, the rubber and the thermoplastic polymer is:
The rubber and thermoplastic high molecular weight polymer are usually preferably in the range of 2 to 20 parts by weight based on 100 parts by weight of the artificial asphalt. When the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the performance as a modified artificial asphalt cannot be exhibited, and the adhesive strength between the aggregates and between the aggregate and the road surface and the grasping power are improved. If the amount of the rubber and the thermoplastic polymer exceeds 20 parts by weight, whereas the former artificial asphalt is not much different from the previous artificial asphalt, the cohesive force is too strong, and the aggregate is separated from the aggregate. Easy to scatter.

The above-mentioned artificial asphalt or modified artificial asphalt used for preparing the artificial asphalt emulsion of the present invention is further added with the same tackifier as used in the above-mentioned asphalt emulsion or modified asphalt emulsion. Such artificial asphalt or modified artificial asphalt can be emulsified using the same emulsifier as described in the above asphalt emulsion,
An artificial asphalt emulsion or a modified artificial asphalt emulsion can be used.

Such artificial asphalt emulsions include sodium naphthalenesulfonate, casein, alginic acid, gelatin, carboxymethylcellulose, ethylcellulose, hydroxyethylcellulose, polyvinyl alcohol, sodium polyacrylate, ligninsulfonate, nitrohumate and the like. Can be used. Further, similarly to the above-mentioned asphalt emulsion, an antioxidant, an antioxidant, sulfur and the like may be added. Further, for the purpose of adjusting viscosity, MC, CMC, HE may be added.
It is also possible to add a water-soluble polymer protective colloid such as C, PVA or gelatin.

These artificial asphalt emulsions or modified artificial asphalt emulsions have the same purpose as the above-mentioned asphalt emulsions for the purpose of improving heat resistance, preventing deterioration due to ultraviolet rays, improving workability, and improving adhesion. Further, an ultraviolet absorber, various additives, a viscosity modifier, a film-forming aid, and the like may be added.

The evaporation residue (solid matter) of the asphalt emulsion and the artificial asphalt emulsion used for forming the protective layer in the present invention is usually preferably about 40 to 70% by weight, particularly preferably 50 to 68% by weight. More preferred. If the evaporation residue content is less than 40% by weight, it is not always impossible to use it, but it is difficult to obtain the required degree of viscoelasticity, while if the evaporation residue content exceeds 70% by weight, it cannot be used. This is not the case, but it tends to be difficult to ensure good workability.

The above-mentioned evaporation residue has the following properties a) and b): a) a penetration (25 ° C.) of 5 to 60 (1/10 mm); b) a softening point. A ′) preferably has a penetration degree (25 ° C.) of 10 to 40 (1/10 m).
m) and b ′) having a softening point of 50 to 70 ° C. are desirable. The penetration of evaporation residue in asphalt emulsion or artificial asphalt emulsion is 5 (1/1)
0 mm) is not preferable because the asphalt after decomposition of the asphalt emulsion becomes too hard. Conversely, if the penetration exceeds 60 (1/10 mm), the asphalt emulsion or the artificial asphalt emulsion decomposes. When light vehicles such as bicycles pass on the top, the asphalt emulsion or artificial asphalt emulsion after disassembly adheres to the vehicle tires, etc., which may cause the aggregates to peel off and adhere to the vehicle tires, etc. In addition to soiling, there is a risk that the constructed pavement layer will be damaged. On the other hand,
When the softening point of the evaporation residue in the asphalt emulsion or the artificial asphalt emulsion is less than 40 ° C., the asphalt or the artificial asphalt after the decomposition of the asphalt emulsion or the artificial asphalt emulsion easily causes a flash phenomenon on a road surface under a high temperature such as in summer, On the other hand, if the softening point is higher than 80 ° C., the flexibility of the asphalt or artificial asphalt after the decomposition of the asphalt emulsion or artificial asphalt emulsion is insufficient, which is not preferred. Here, the penetration and the softening point are JISK22.
07.

<Resin-Based Material> Examples of the resin-based material used for forming the protective layer in the present invention include an epoxy resin, a polyurethane resin, a modified epoxy resin, a modified polyurethane resin, a polyester resin, a methacrylate resin, and a polyurethane-modified acrylate. Resins, polyacrylate resins and the like can be mentioned, and among them, latex of these resins is preferable. The latex can be produced by dispersing these resins in water in the form of colloid by the action of an emulsifier to form a suspension, or by emulsion-polymerizing the corresponding monomers. Such latex can be sprayed in the same manner as asphalt emulsion, etc., and has excellent workability,
Since it can be installed at room temperature, there is no need for heating and there is little danger, and there is no generation of carbon dioxide gas due to heating, it is a preferable material from the viewpoint of global environmental protection.

Here, the modified epoxy resin is, for example,
Epoxy resin modified with asphalt, tar, heavy oil, process oil, liquid resin, liquid polybutadiene, etc. This modified epoxy resin is a two-pack type and requires a curing agent such as polyamine, polyamide, or organic acid anhydride, and the epoxy resin modifying agent may be added to the resin side, the curing agent side, or both.

The modified polyurethane resin is of a two-pack type composed of a polyol component and a polyisocyanate component. The modification is performed by adding asphalt, tar, heavy oil, process oil, liquid resin or the like to the polyol component. Do by doing. Thus, like epoxy resin and polyurethane resin, modified epoxy resin and modified polyurethane resin are also two-pack type, and when two liquids are mixed at a fixed ratio, the two components react and harden to exhibit a strong bonding force. Will be done.

In the case of epoxy resin, polyurethane resin, modified epoxy resin, and modified polyurethane resin, the mixing ratio of the curing agent is 50 to 50 parts by weight based on 100 parts by weight of the resin component. A proportion of 100 parts by weight is preferred. In the case of a polyester resin or an acrylate resin, the curing agent is preferably about 1 to 5 parts by weight based on 100 parts by weight of the resin component.

The latex as described above can be used in the construction of the protective layer in the present invention. The latex used in the construction of the protective layer preferably has an evaporation residue of 30 to 55. %, And the viscosity of the latex itself at 25 ° C. is in the range of 15 to 45 poise.
In the range of 0 to 50% by weight, 25 ° C of the latex itself
When the viscosity in the range of 20 to 30 poise is used, the function as the protective layer is further improved, and the advantage that the workability is improved is obtained.

That is, if the amount of the evaporation residue is less than 30% by weight, it cannot be said that the material cannot be used. However, it is difficult to obtain the viscoelasticity required as a constituent material of the protective layer. Then, this is not necessarily impossible to use, but it is difficult to secure good workability. The latex has a viscosity of 15
When the viscosity is less than poise, the viscosity is too low, and there is a tendency that a good protective layer cannot be obtained. On the other hand, when the viscosity exceeds 45 poise, it cannot be used at all, but the workability tends to be poor. There is.

The asphalt emulsion, artificial asphalt emulsion and latex used for forming the protective layer in the present invention can be colored by appropriately adding an organic and / or inorganic pigment. For example, by using an asphalt emulsion, artificial asphalt, or latex colored in the same system as the aggregate to be used, the lightness of the aggregate can be further enhanced. Examples of the inorganic pigments 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, purple: dioxazine violet, and the like.

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

Next, a method of repairing a sidewalk pavement according to the present invention will be described with reference to the drawings.

FIG. 1 schematically shows a cross section of the pavement after repair. Reference numeral 1 denotes an existing sidewalk pavement, and the existing sidewalk pavement 1 has a structure as shown in the figure. Irregularities,
Cracks 2, 2 'are present. In order to repair such an existing sidewalk pavement 1, first, the surface of the sidewalk pavement 1 to be repaired is cleaned with a load sweeper, and then a relatively large crack 2 ′ is compressed with high-pressure air or the like. Is sprayed to remove sand dust and the like inside the crack, and the inside of the crack is filled with a filler 3 such as a joint material or a sealing material. The same applies when a large pothole or the like exists. Next, an asphalt emulsion (not shown) is applied as a tack coat at a ratio of 0.4 to 0.6 (liter / m ² ) as needed.

After the application of the tack coat, the asphalt mixture 4 is spread evenly by human power, or the asphalt mixture 4 is spread using an asphalt finisher or the like. The spread asphalt mixture 4 is then rolled using a rolling machine such as a tire roller or a steel roller (not shown) to fill the remaining cracks 2, 2,. Paved as asphalt mixture layer. The average thickness of the pavement after rolling is about 1 to 3 cm, preferably about 1 to 2 cm. Where "on average"
This is because, if there are irregularities on the pavement surface, the pavement thickness of the asphalt mixture may vary from place to place, and in such a case, for example, the pavement thickness between a place where the pavement thickness is thin and a place where the pavement thickness is thick Means on average. In the above example, the asphalt mixture 4 was paved on the surface of the existing sidewalk pavement 1, but the existing sidewalk pavement 1
A part of the surface may be cut and removed, and paved on the exposed surface, or when applied when newly installing a sidewalk pavement, a roadbed such as an upper roadbed or a base layer The asphalt mixture 4 may be paved on such a surface.

When the paving of the asphalt mixture 4 is completed, the aggregate 5 is then sprayed. The amount of aggregate 5 sprayed is
Range of 100 m ² per 0.3～0.6M ³ are preferred.
If the amount of aggregate scattered per 100 m ² is less than 0.3 m ^3, it causes a flash phenomenon. Conversely, if the amount of aggregate per 100 m ² exceeds 0.6 m ³ , excess aggregate will As a result, the road surface becomes difficult for pedestrians to walk. Also, it is desirable that the larger the aggregate particle size, the larger the amount of aggregate to be scattered. The aggregate is usually sprayed at room temperature, but may be sprayed while being heated to 100 to 170 ° C. Spraying of aggregate may be done manually,
If a chipping machine is used, it can be sprayed efficiently.

When the dispersing of the aggregate 5 is completed, the dispersing surface of the aggregate 5 is rolled using a tire roller, a steel roller or the like, and after rolling, the binder 6 is dispersed or applied on the rolling surface. Form a protective layer. The dispersing of the binder 6 is preferably performed using a distributor or a single-spray engine sprayer, and the application is preferably performed using, for example, a roller brush. The amount of the binder 6 used is
Covers the surface of the aggregate 5 and mixes the aggregate 5 with the asphalt mixture 4
No particular limitation is imposed as long as the binder 5 is used.
Range of 0 m ² per 40 to 160 liters are preferred. 1
If the amount of the asphalt emulsion per 00 m ² is less than 40 liters, there is a possibility that the bonding strength and the adhesive strength between the asphalt mixture layer and the aggregate and between the aggregate and the aggregate may be insufficient.
If it exceeds 60 liters, it may cause a flash phenomenon. The amount of binder used to form the protective layer varies according to the particle size of the aggregate, and generally, the greater the aggregate used, the greater the amount used.

Thus, a layer of asphalt mixture 4
As shown in FIG. 1, the pavement layer 7 is constructed by integrating the layer of the aggregate 5 with the protective layer 6. After the bonding material for forming the protective layer is sprayed, a curing time of about 20 to 50 minutes is set, and then the vehicle is opened to traffic.

The pavement layer 7 constructed in this manner is characterized in that the layer of the aggregate 5 integrated with the layer of the asphalt mixture 4 by the protective layer formed of the binder 6 provides slip resistance and has a non-slip function. And the gap existing between the aggregates 5 can effectively drain rainwater and the like in accordance with the gradient of the road surface. On the layer of aggregate 5 is a binder 6
Since the protective layer of the asphalt mixture 4 exists, the aggregate 5 is firmly bonded to the layer of the asphalt mixture 4 and does not fly. Further, since the pavement layer 7 has a layer of the asphalt mixture 4 having a certain thickness, cracks and irregularities existing in the existing sidewalk pavement 1 can be effectively filled,
Can be averaged. In addition, the existing pavement pavement 1 was effectively repaired by the pavement layer 7 without rainwater or the like permeating the layer of the asphalt mixture 4.

Further, in a preferred example of the method for repairing sidewalk pavement of the present invention, after paving the asphalt mixture 4,
Before the asphalt mixture 4 has not completely hardened yet, the aggregate 5 is sprayed, and then the spreading surface of the aggregate 5 is rolled using a tire roller or a steel roller, for example, as shown in FIG. And pushing the aggregate 5 into the asphalt mixture 4 from the position indicated by the broken line to the position indicated by the solid line, and partially embedding the aggregate 5 in the asphalt mixture 4. Thereby, the aggregate layer formed from the aggregate 5 is more firmly integrated with the asphalt mixture layer formed from the asphalt mixture 4, and a more durable pavement layer can be constructed.

The depth for embedding the aggregate 5 is
Particle size L₁, The embedding depth L₂Is L₂=
(1/3 to 2/3) L₁The degree is preferred. Embedding depth
L₂Is too shallow, the effect of embedding is less
And the depth L to be embedded ₂Is too deep and slips
The stopping effect and drainage effect tend to diminish,
No.

The timing of spraying the aggregate 5 and rolling the spraying surface may be any time as long as the asphalt mixture 4 has not yet completely hardened. Preferably, the asphalt mixture is of a heating type. In this case, it is preferable that the heat treatment be performed before the temperature is completely cooled, for example, while the temperature is kept at about 120 to 170 ° C. If the asphalt mixture 4 has already hardened, the surface of the asphalt mixture 4 is heated and softened using a heating device such as a heater planar, and then the aggregate 5 is heated.
And rolling may be performed. Therefore,
The asphalt mixture 4 is not limited to the one that has been laid as an overlay layer for repair, and may be one that has already been laid as a surface layer at the time of new construction, but has already existed as a surface layer of an existing pavement. Is also good.

After the scattered surface of the aggregate 5 is compacted, the scattered surface of the aggregate 5 is allowed to cool to ambient temperature if necessary, and then the binder 6 is removed in the same manner as described with reference to FIG. By spraying or applying, as shown in FIG. 3, the pavement layer 7 in which the asphalt mixture layer, the aggregate layer, and the protective layer are integrated is constructed. The constructed pavement layer 7 has a structure in which the aggregate 5 is partially asphalt mixture 4.
Since it is embedded in the inside, the bonding strength between the aggregate 5 and the asphalt mixture 4 is enhanced, and the pavement layer is more durable.

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

<Experiment 1> Effect of presence and type of protective layer on durability of constructed pavement layer-In the case of artificial asphalt emulsion Heated mold was placed in a mold 30 cm long, 30 cm wide and 3 cm thick. The particle size asphalt mixture was paved to a thickness of 3 cm. Aggregate (crushed stone from Kuzu, Tochigi Prefecture, particle size 2-1 mm) while the dense dense asphalt mixture is still hot
Spray 0.4 liter on the asphalt mixture surface,
Subsequently, a load of linear pressure of 7 kgf / cm was applied by a laboratory roller, and pressure was applied 15 times in opposite directions, for a total of 30 rotations. After rolling, the aggregate surface is allowed to cool to ambient temperature, and 0.1 liter of an artificial asphalt emulsion A having the following properties as a binder is sprayed thereon to form an asphalt mixture layer, an aggregate layer, and a protective layer. Was experimentally constructed. Pavement layers B and C were constructed in the same manner except that artificial asphalt emulsion A was changed to artificial asphalt emulsions B and C having the following characteristics. For comparison, a pavement layer D was constructed in the same manner as the pavement layer A, except that the protective layer was not provided. The characteristics of the artificial asphalt emulsion used are as follows.

Artificial asphalt emulsion A (“Techcoat A”, manufactured by Nichireki Co., Ltd.) Evaporation residue: 60% by weight Penetration of evaporation residue (25 ° C.): 20 (1/10 mm) Softening point of evaporation residue : 63 (° C) Artificial asphalt emulsion B Evaporation residue: 60% by weight Penetration of evaporation residue (25 ° C): 103 (1/10 m
m) Softening point of evaporation residue: 65 (° C.) Artificial asphalt emulsion C Evaporation residue: 60% by weight Penetration of evaporation residue (25 ° C.): 80 (1/10 mm) Softening point of evaporation residue: 90 (℃)

After the construction of the pavement layers A to D, after 3 hours of curing time, an adult boy weighing 65 kg was put on athletic shoes,
When a load was applied to the surface of each of the pavement layers A to D while walking on each of the pavement layers, the pavement layer A did not feel sticky to the athletic shoe sole, peeled off the aggregate, and damaged the protective layer. On the other hand, in the pavement layer B, there was a sticky feeling to the athletic shoe sole, and it was observed that a part of the aggregate adhered to the athletic shoe sole together with the protective layer. This is because the penetration of the artificial asphalt emulsion B constituting the pavement layer B is 10%.
3 (1/10 mm). Further, in the pavement layer C, the sticky feeling to the athletic shoes was not as large as that of the pavement layer B, but it was observed that the protective layer was partially damaged by the load by the athletic shoes and the aggregate was peeled off. This is because the artificial asphalt emulsion C constituting the pavement layer C has a high penetration of 80 (1/10 mm) and a softening point of 90.
(° C.), it is considered that the bonding strength for integrating the aggregate and the asphalt mixture is poor. On the other hand, in the pavement layer D without the protective layer, it was observed that the aggregate partially peeled off due to the load by the athletic shoes.

<Experiment 2> Effect of presence or absence and type of protective layer on durability of constructed pavement layer-case of latex Except that latexes A to C having the following properties were used instead of artificial asphalt emulsion: Pavement layers EG for testing were constructed in the same manner as in Experiment 1.

Latex A (acrylic latex) Evaporation residue: 45% by weight Viscosity of latex itself (25 ° C.): 27 (poise) Latex B (acrylic latex) Evaporation residue: 25% by weight Viscosity of latex itself (25 ° C.) : 16 (Poise) Latex C (acrylic latex) Evaporation residue: 40% by weight Viscosity of the latex itself (25 ° C): 21 (Poise)

After the construction of the pavement layers E to G, after a curing time of 3 hours, as in Experiment 1, an adult boy weighing 65 kg was put on athletic shoes, and was walked on each pavement layer. EG
When a load was applied to the surface, in the pavement layer E using the latex A, neither exfoliation of the aggregate nor breakage of the protective layer was observed. In the pavement layer F using No., breakage of the protective layer and peeling of the aggregate were observed at several places. Further, the pavement layer G using the latex C having both the evaporation residue amount and the viscosity near the lower limit of the preferable range.
In, slightly, breakage of the protective layer and peeling of the aggregate were 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 A method for repairing a sidewalk pavement according to the present invention was implemented using a part of a sidewalk connecting buildings in a factory. Large and small cracks were observed on the existing pavement surface, and irregularities were also observed. First, width 1.2m, length 5
m, the road surface was cleaned with a road sweeper, and then as a tack coat, an asphalt emulsion (trade name “CPE-4”, manufactured by Nichireki Co., Ltd.) was used at 0.6 (liter / liter) using an engine sprayer. m ² ). After spraying, the heating type dense particle size asphalt mixture (asphalt content: 5.5% by weight) is averaged about 3c by human power.
m and then rolled using a vibrating roller. While the rolling surface was still hot (120-150 ° C.), the aggregate was sprayed at a rate of 4 (liter / m ² ). After spraying,
Immediately with a tandem roller, the aggregate particles were embedded in the asphalt mixture to about 1/2 of the particle size.
Thereafter, the mixture was allowed to cool down to the atmospheric temperature, and the artificial asphalt emulsion was sprayed at a ratio of 0.8 (liter / m ² ) with an engine sprayer to form a protective layer, and the asphalt mixture layer and the aggregate layer were formed. The pavement layer in the sidewalk pavement of the present invention integrated with the protective layer was constructed. The materials used are as follows.

Aggregate: "Road serum red, grain A" (particle diameter: 2-1 mm, red, manufactured by Itochu Ceratech Co., Ltd.) Precoated with 0.6% by weight of red color binder Binder: used in Experiment 1 Artificial asphalt emulsion A10
A mixture of 0 parts by weight and 3 parts by weight of a red pigment (manufactured by Dainichi Seika)

The constructed surface treatment layer had a vivid red color and provided a beautiful appearance as a sidewalk. After curing for half a day, several adult males and females repeatedly walked on the surface-treated layer, but no peeling or scattering of aggregate was observed. Further, no adhesion of the aggregate to the shoe sole was observed. After a lapse of three months, the repaired surface was observed. As a result, no irregularities or cracks appeared, and no trace of the aggregate was observed. Also, when observed during rainfall, it was observed that the rainwater flowed along the gap between the aggregates and exhibited good road surface drainage properties, and provided high slip resistance during walking.

<Example 2> On the pavement surface of the existing sidewalk adjacent to the construction site in Example 1, as a binder for forming a protective layer, instead of using a mixture of artificial asphalt emulsion A and a pigment, The method for repairing sidewalk pavement of the present invention was carried out in the same manner as in Example 1, except that a mixture of latex and pigment shown in (1) was applied using a roller brush.

Binder: Acrylic latex (“Licabond ES-16”, evaporation residue: 46% by weight, viscosity:
17 Poise, a mixture of 100 parts by weight of Chuo Rika Kogyo Co., Ltd. and 3 parts by weight of a red pigment (manufactured by Dainichi Seika Co., Ltd.)

The constructed surface treatment layer had a vivid red color and gave a beautiful appearance as a sidewalk. After curing for half a day, several adult males and females repeatedly walked on the surface-treated layer, but no peeling or scattering of aggregate was observed. Further, no adhesion of the aggregate to the shoe sole was observed. After a lapse of three months, the repaired surface was observed. As a result, no irregularities or cracks appeared, and no trace of the aggregate was observed. Also, when observed during rainfall, it was observed that the rainwater flowed along the gap between the aggregates and showed good road surface drainage properties, and provided high slip resistance during walking.

[0078]

As described above, the method for repairing a sidewalk pavement according to the present invention comprises a step of laying an asphalt mixture on a road surface including a surface of a sidewalk pavement to be repaired, And a step of spraying or applying a binder on the aggregate that has been sprayed to form a protective layer, and forming a pavement layer in which the asphalt mixture layer, the aggregate layer, and the protective layer are integrated. As it is constructed, flattening of irregularities and filling of cracks can be performed relatively easily, and penetration of rainwater etc. can be prevented, and slippage due to the presence of the aggregate layer integrated with the asphalt mixture layer It is possible to easily and inexpensively construct a pavement layer having not only a stopping function but also good road surface drainage property and excellent flatness.

The method for repairing sidewalk pavement of the present invention is to construct a pavement layer in which an asphalt mixture layer and an aggregate layer are integrated by a protective layer by a series of steps.
When the aggregate is partially embedded in the asphalt mixture by performing the application of the aggregate and the compaction of the aggregate application surface before the asphalt mixture is completely hardened, the aggregate and the asphalt mixture are used. Is further strengthened, and a pavement layer having excellent durability can be constructed. The pavement layer of the present invention thus constructed is
The asphalt mixture layer, the aggregate layer and the protective layer are integrated, which has an unprecedented configuration, whereby the pavement layer of the present invention can prevent the aggregate from scattering. , Has the function of flattening irregularities, filling cracks, preventing penetration of rainwater, etc., and also has a non-slip function and good road surface drainage, and has no joints,
It is a pavement layer with excellent flatness. The sidewalk pavement repair method and pavement layer of the present invention bring new possibilities in the field of pavement pavement repair, and the object is not limited to repair, but also when flattening a new sidewalk, flatness is improved. Excellent,
Moreover, it is extremely useful and excellent as a non-slip sidewalk pavement and its construction method.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a cross-sectional configuration of an example of a pavement obtained by a method for repairing a sidewalk pavement of the present invention.

FIG. 2 is an explanatory view of a step of compacting the aggregate and partially embedding the aggregate in the asphalt mixture.

FIG. 3 is a diagram schematically illustrating a cross-sectional configuration of another example of the pavement obtained by the method for repairing a sidewalk pavement of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing sidewalk pavement 2, 2 'crack 3 Filler 4 Asphalt mixture 5 Aggregate 6 Binder 7 Pavement layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hidetoshi Suzuki 42-3 Inaba-go, Oyama-shi, Tochigi F-term (reference) 2D051 AA03 AA08 AB03 AC02 AE01 AF01 AG01 AG03 AG11 AH01 EA01 EA06 2D053 AA13 AA15 AA21 AD01 AD03

Claims (10)

[Claims] 1. A step of laying an asphalt mixture on a road surface, a step of spraying an aggregate on a laid surface of the asphalt mixture, and a step of spraying or applying a binder on the scattered aggregate. Forming a protective layer that covers the asphalt mixture layer, the aggregate layer, and the protective layer to form a pavement layer integrated with the sidewalk pavement. 2. The method for repairing a sidewalk pavement according to claim 1, wherein the asphalt mixture is a dense particle type asphalt mixture. 3. The pavement thickness of the asphalt mixture is 1 on average.
The method for repairing a sidewalk pavement according to claim 1 or 2, wherein the distance is from 3 cm to 3 cm. 4. The step of dispersing the aggregate is performed before the paved asphalt mixture has not yet completely cured, and then dispersing the aggregate before the paved asphalt mixture has not yet fully cured. 4. The method for repairing a sidewalk pavement according to claim 1, further comprising a step of rolling the surface and partially embedding the aggregate in the asphalt mixture layer. 5. The method for repairing a sidewalk pavement according to claim 1, wherein a single-grain aggregate having a particle size of 3 mm or less is used as the aggregate to be sprayed. 6. The method for repairing a sidewalk pavement according to claim 1, wherein the aggregate to be sprayed is coated with a bituminous material. 7. The binding material forming the protective layer is a bituminous material or a resin-based material.
Repair method of sidewalk pavement described. 8. A pavement layer constructed by the method for repairing sidewalk pavement according to claim 1. 9. A pavement layer in a sidewalk pavement in which an asphalt mixture layer, an aggregate layer, and a protective layer covering the aggregate layer are integrated. 10. The pavement layer according to claim 11, wherein the aggregate forming the aggregate layer is partially embedded in the asphalt mixture layer.