JP2012193591A - Paving material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paving material having excellent curability and followability to asphalt pavement.SOLUTION: A paving material to be laminated on the surface of an asphalt-paved road for use as a driveway with a thickness of 0.5 to 2.5 mm is formed of the mixture of cement, gypsum, a synthetic resin emulsion having a glass transition point of -15°C to 50°C, and silica sand or crushed ceramic particles each having an average particle diameter of 0.5 to 1.5 mm.

Description

  The present invention relates to a paving material excellent in curability and followability to asphalt pavement.

Conventionally, as one of pavement materials laminated on a road pavement surface used for a roadway, there is one using a synthetic resin as a binder.
For example, there is a binder polymer and at least one pigment selected from the group consisting of zinc phosphate and calcium zinc phosphate (see, for example, Patent Document 1).
Moreover, there exists what mixed the finely pulverized particle | grains of glass or ceramics with the synthetic resin binder and the synthetic resin hardening agent (for example, refer patent document 2).
Further, an aggregate having 99.9% by mass or more of aggregate having a particle diameter of 100 μm to 3000 μm and 80% by mass or more of aggregate having a particle diameter of 400 μm or more with respect to the mass of the total aggregate, and an aqueous resin dispersion There is one that spreads and mixes the mixture in a thickness of 3 mm to 10 mm on the surface to be constructed (see, for example, Patent Document 3).
However, when these pavement materials are to be constructed on the surface of asphalt road pavement with a thickness of 0.3 to 2.5 mm, drying or curing is slow and the time from construction completion to road release becomes long. There is a problem that cracks are likely to occur because the deformation due to temperature change cannot be sufficiently followed. Moreover, since a thing with quick drying or hardening cannot ensure sufficient thickness, there existed a problem that durability was not enough for the use of a roadway.

JP 2003-82285 A (pages 2 to 3) JP-A-9-228304 (pages 2 and 3) JP 2010-222887 A (pages 2 and 3)

  The problem to be solved is to provide a paving material that is used as a synthetic resin emulsion and has excellent curability.

  The invention of the pavement according to claim 1 is a pavement that is laminated on the surface of an asphalt pavement used for a roadway to a thickness of 0.5 to 2.5 mm, and the pavement is made of cement, gypsum, The most important feature is that it is formed by mixing a synthetic resin emulsion having a glass transition point of −15 to 50 ° C. and cinnabar sand or ceramic pulverized grains having an average particle diameter of 0.5 to 1.5 mm.

  The invention of the pavement material according to claim 2 is characterized in that, in the invention according to claim 1, the mixing ratio of cement and gypsum in the pavement material is changed by the outside air temperature during construction. .

According to the first aspect of the present invention, there is an advantage that it is excellent in curability and can sufficiently follow the deformation of the asphalt pavement due to a temperature change.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, there is an advantage that it can be cured in a certain time regardless of the temperature change due to the season.

Hereinafter, embodiments embodying the present invention will be described.
The pavement material of the present invention is a pavement material laminated to a thickness of 0.5 to 2.5 mm on the surface of an asphalt pavement used for a roadway, and the pavement material has a cement, gypsum and glass transition point of −15. It is necessary to be formed by mixing a synthetic resin emulsion having a temperature of 50 ° C. to 50 ° C. and cinnabar sand or ceramic pulverized grains having an average particle size of 0.5 to 1.5 mm. The composition of the paving material of the present invention is as follows, for example.

Composition example of paving material of the present invention: 100 parts by mass of white Portland cement as cement, 300 parts by mass of hemihydrate gypsum as gypsum, 100 parts by mass of acrylic resin emulsion as synthetic resin emulsion, 500 parts by mass of cinnabar, thickener 1 Part by mass.

In the present invention, the above-mentioned roadway means a roadway defined by the Road Traffic Law (Act No. 105 of June 25, 1955) or a curb line to be used for vehicle traffic or other Roads defined by similar works or road markings), main roads (roads specified in Article 4 paragraph 1 of the National Highway Expressway (Act No. 79 of 1932) ) Or an automobile-only road (a roadway composed of the main lanes of an automobile-only road as defined in Article 48-4 of the Road Act) and vehicle lanes (where the vehicle is defined on the road) This refers to the portion of the road indicated by the road marking when the road marking indicates that the road should pass.

The asphalt paved road refers to a roadway paved with asphalt such as straight asphalt and modified asphalt for paving. Generally, it is composed of a surface layer, a base layer, and a roadbed made of an asphalt mixture, and is constructed on a roadbed. The roadbed is usually constructed by dividing it into an upper layer roadbed and a lower layer roadbed.

The paving material is laminated on the surface of an asphalt paved road with a thickness of 0.5 mm to 2.5 mm, and is used for all or part of the surface. The thickness of the paving material is preferably 0.5 mm to 2.5 mm, more preferably 0.8 mm to 2.0 mm, and most preferably 1.0 mm to 1.5 mm. When in this range, it is excellent in curability, durability, and crack resistance. When the laminated thickness of the paving material is less than 0.5 mm, the thickness is too thin and the durability is not sufficient. On the other hand, if it exceeds 2.5 mm, it may be too thick and cracking may occur, and since the time for curing becomes long, the time from the completion of construction to the road opening becomes long.

The cement is a powder that hardens with water and develops strength. For example, ordinary Portland cement, white Portland cement, early-strength Portland cement, sulfate-resistant Portland cement, moderately hot Portland cement, ultra-early strong Portland cement, low heat Portland cement, low alkali type Portland cement, blast furnace cement (A , B, C type), fly ash cement (A, B, C type), mixed cement such as silica cement (A, B, C type), eco cement, alumina cement, ultrafine particle cement, high belite type cement, etc. Is mentioned.

These cements are preferably used by mixing with gypsum. By using a mixture of cement and gypsum, it is possible to accelerate the curing of the pavement material, and furthermore, the curing time of the pavement material can be controlled by the mixing ratio, so the curing time can be adjusted according to the annual temperature fluctuation. Can be optimized.

By using at least one of ordinary Portland cement, white Portland cement, early-strength Portland cement, and ultra-early strong Portland cement as the cement, it becomes easy to adjust the curing rate by mixing with gypsum. In addition, when white Portland cement is used, the reflectance of sunlight (hereinafter referred to as “sunlight reflectance”. The measurement method is defined in JIS K5602) is kept high due to the low content of iron oxide. be able to. By increasing the solar reflectance, it is possible to suppress the road surface temperature from rising due to sunlight, and thus it is possible to suppress thermal deformation of the asphalt pavement. Further, by using one or more of white Portland cement, early strength Portland cement, and ultra-early strength Portland cement as cement, it is possible to suppress the amount of white flower produced on the surface after the construction of the paving material.

When white Portland cement is used as the cement and hemihydrate gypsum is used as the gypsum, the mixing ratio of white Portland cement to 100 parts by mass of hemihydrate gypsum at an external temperature of T ° C. is 0.3 × T ^1.2 to 2. 5 × T ^1.2 (where T> 0) is preferable, 0.5 × T ^{1.2 to} 1.5 × T ^1.2 is more preferable, and 0.7 × T ^1. Most preferably, it is ^{2 to} 1.0 × T ^1.2 . When in this range, the road can be opened within 90 minutes after completion of construction regardless of the outside temperature. When the mixing ratio of white Portland cement with respect to 100 parts by mass of hemihydrate gypsum at an outside air temperature T ° C. is less than 0.3 × T ^1.2 , the setting time may be too early, which may hinder construction work. On the other hand, when it exceeds 2.5 × T ^1.2 , the curing time is too late, and the time until the road is opened after the completion of the construction becomes long, and there is a concern that smooth traffic may be hindered.

When ordinary Portland cement specified in JIS R5210 is used as the cement and hemihydrate gypsum is used as the gypsum, the mixing ratio of ordinary Portland cement with respect to 100 parts by mass of hemihydrate gypsum at an external temperature of T ° C is 0. 1 × T ^{1.2 to} 2.0 × T ^1.2 (where T> 0) is preferable, and 0.3 × T ^{1.2 to} 1.3 × T ^1.2 is more preferable. It is preferably 0.4 × T ^{1.2 to} 0.8 × T ^1.2 . When in this range, the road can be opened within 90 minutes after completion of construction regardless of the outside temperature. When the mixing ratio of ordinary Portland cement with respect to 100 parts by mass of hemihydrate gypsum at an external temperature T ° C. is less than 0.1 × T ^1.2 , the setting time may be too early, which may hinder construction work. On the other hand, when it exceeds 2.0 × T ^1.2 , the curing time is too late, and the time until the road is opened after the completion of the construction becomes long, which may hinder smooth traffic.

The synthetic resin emulsion includes styrene / butadiene rubber latex, acrylonitrile / butadiene rubber latex, chloroprene latex, vinyl acetate resin emulsion, vinyl chloride resin emulsion, urethane resin emulsion, versatic acid vinyl resin emulsion, epoxy resin emulsion, silicone resin emulsion, acrylic resin. Resin emulsion, fluororesin emulsion, melamine resin emulsion, styrene resin emulsion, polyester resin emulsion and the like can be mentioned. These may be used alone or in combination. Further, monomers having two or more compositions may be copolymerized and used. Among these, it is preferable to use an acrylic resin emulsion. By using the acrylic resin, the weather resistance of the paving material is excellent, so that the aesthetic appearance of the paving surface can be maintained for a long time.

Examples of the acrylic resin monomer include methyl methacrylate, ethyl methacrylate, butyl methacrylate, acrylic acid, 2-ethylhexyl acrylate, butyl acrylate, ethyl acrylate, methyl acrylate, tertiary butyl acrylate, and methacrylic acid. Examples include cyclohexyl and 4-hydroxybutyl acrylate. Of these, methyl methacrylate, butyl methacrylate, 2-ethylhexyl acrylate, and cyclohexyl methacrylate are preferably used. These may be used singly or in combination of two or more.

The synthetic resin contains an ethylenically unsaturated monomer having one or more monomer units and one or more organosilicon groups among ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, and ethylenically unsaturated phosphonic acid. It is preferable that the epoxy resin contains a synthetic resin emulsion. A synthetic resin emulsion containing an ethylenically unsaturated monomer having one or more monomer units and one or more organosilicon groups among ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, and ethylenically unsaturated phosphonic acid. In addition, the epoxy silane content improves gasoline resistance and automobile oil resistance, and is excellent in retention of dredged sand or ceramic crushed grains.

The glass transition point of the synthetic resin used for the synthetic resin emulsion is preferably -15 ° C to 50 ° C, more preferably -10 ° C to 45 ° C, and most preferably -5 ° C to 35 ° C. preferable. When in this range, the pavement material can follow the thermal deformation of the asphalt pavement caused by temperature changes, so cracking and peeling of the pavement material can be suppressed, and even when the traffic volume increases, there is little abrasion , Excellent holding power of crushed sand or ceramic crushed grains. When the glass transition point of the synthetic resin is less than −15 ° C., the pavement material is too soft and wears down when the traffic volume increases, and the wear resistance is not sufficient. It is shaved by the chain and the wear resistance is not sufficient. In addition, tire marks are likely to adhere to the pavement surface and are easily contaminated. Conversely, when the glass transition point of the synthetic resin exceeds 50 ° C, the pavement material is too hard to follow the deformation of the asphalt pavement caused by the temperature change in the four seasons, and the pavement material may be cracked or peeled off. There is.

In the present invention, the traffic volume means an average large vehicle traffic volume per day (vehicle / day / direction), and is less than 100 (hereinafter referred to as “L traffic”), 100 to 249 (hereinafter referred to as “A”). "Traffic"), 250-999 (hereinafter referred to as "B traffic"), 1000-2999 (hereinafter referred to as "C traffic"), and 3000 or more (hereinafter referred to as "D traffic"). .
The large vehicles refer to large vehicles stipulated in the Road Traffic Law Enforcement Regulations (December 3, 1953 Prime Minister's Ordinance No. 60), including large special vehicles, large motorcycles, ordinary motorcycles, and small vehicles. Automobiles other than special vehicles that have a total vehicle weight of 11,000 kilograms or more, a maximum load capacity of 6,500 kilograms or more, or a passenger capacity of 30 people or more.

The average particle size of the cinnabar or ceramic pulverized particles needs to be 0.5 mm to 1.5 mm, more preferably 0.6 mm to 1.2 mm, and 0.7 to 1.0. Is most preferred. When it exists in this range, it is excellent in the surface smoothness of a paving material, and is excellent in slip resistance. Moreover, a paving material can be constructed while maintaining an appropriate thickness. If the average particle size of the cinnabar or ceramic pulverized grains is less than 0.5 mm, the particles are too fine and the pavement material may be cracked. On the other hand, when the thickness exceeds 1.5 mm, there is a possibility that the thickness of the pavement material is excessively increased and the curing time becomes long.

The cinnabar or ceramic pulverized grains are preferably colored. Since the colored cinnabar or ceramic pulverized grains are colored, the colored cinnabar or ceramic pulverized grains appear on the surface even when the binder is worn by traffic, so that the change in color tone can be suppressed.

The cement, gypsum, synthetic resin emulsion and cinnabar or ceramic pulverized particles are mixed and used immediately before construction. Of these, two or more of cement, gypsum and cinnabar or ceramic pulverized particles can be mixed in advance.

The ratio of the solid content of the synthetic resin emulsion when the mixture of cement and gypsum is 100 parts by mass is preferably 10 to 100 parts by mass, more preferably 15 to 70 parts by mass, and most preferably 20 to 50 parts by mass. It is. When it is within this range, the paving material is excellent in the followability to the asphalt pavement and the wear resistance. When the ratio of the solid content of the synthetic resin emulsion is less than 10 parts by mass when the mixture of the cement and gypsum is 100 parts by mass, the paving material is too hard to sufficiently follow the asphalt pavement. Conversely, when it exceeds 100 parts by mass, the paving material is too soft and the wear resistance is not sufficient.

When the traffic volume is D traffic, the ratio of cinnabar sand or ceramic pulverized grains is preferably 50 to 250 parts by mass when the mixture of cement, gypsum and solid content of synthetic resin emulsion is 100 parts by mass. More preferably, it is 70-150 mass parts, Most preferably, it is 80-120 mass parts. When in this range, the paving material is excellent in wear resistance and retention of dredged sand or ceramic crushed grains even if the traffic volume is D traffic. In the case where the traffic volume is D traffic and the ratio of dredged sand or ceramic pulverized grains is less than 50 parts by mass when the mixture of cement, gypsum and solid content of synthetic resin emulsion is 100 parts by mass, paving The wear resistance of the material is not sufficient. On the other hand, when the amount exceeds 250 parts by mass, the amount of the binder that holds the crushed sand or the ceramic crushed particles is too small, and the crushed sand or the ceramic crushed particles may be detached.

When the traffic volume is C traffic, the ratio of cinnabar sand or ceramic pulverized grains is preferably 30 to 250 parts by mass when 100 parts by mass of a mixture of cement, gypsum and synthetic resin emulsion solids is used. More preferably, it is 50-150 mass parts, Most preferably, it is 70-120 mass parts. When it is in this range, the paving material is excellent in wear resistance and retention of dredged sand or ceramic crushed grains even if the traffic volume is C traffic. In the case where the traffic volume is C traffic, when the ratio of dredged sand or ceramic pulverized grains is less than 30 parts by mass when the mixture of cement, gypsum and solid content of synthetic resin emulsion is 100 parts by mass, paving The wear resistance of the material is not sufficient. On the other hand, when the amount exceeds 250 parts by mass, the amount of the binder that holds the crushed sand or the ceramic crushed particles is too small, and the crushed sand or the ceramic crushed particles may be detached.

When the traffic volume is B traffic, the ratio of dredged sand or ceramic pulverized particles is preferably 25 to 250 parts by mass when the mixture of cement, gypsum and solid content of synthetic resin emulsion is 100 parts by mass. More preferably, it is 40-150 mass parts, Most preferably, it is 50-120 mass parts. When in this range, the pavement material is excellent in wear resistance and retention of dredged sand or ceramic crushed grains even if the traffic volume is B traffic. When the traffic volume is B traffic and the ratio of the crushed sand or ceramic pulverized particles is less than 25 parts by mass when the mixture of cement, gypsum, and synthetic resin emulsion solids is 100 parts by mass, paving The wear resistance of the material is not sufficient. On the other hand, when the amount exceeds 250 parts by mass, the amount of the binder that holds the crushed sand or the ceramic crushed particles is too small, and the crushed sand or the ceramic crushed particles may be detached.

When the traffic volume is A traffic, the ratio of cinnabar sand or ceramic pulverized grains is preferably 20 to 250 parts by mass when 100 parts by mass of cement, gypsum and synthetic resin emulsion solids are mixed. More preferably, it is 30-150 mass parts, Most preferably, it is 40-120 mass parts. When in this range, the pavement material is excellent in wear resistance and retention of dredged sand or ceramic crushed grains even if the traffic volume is A traffic. In the case where the traffic volume is A traffic and the ratio of the crushed sand or ceramic pulverized particles is less than 20 parts by mass when the mixture of cement, gypsum and the solid content of the synthetic resin emulsion is 100 parts by mass, paving The wear resistance of the material is not sufficient. On the other hand, when the amount exceeds 250 parts by mass, the amount of the binder that holds the crushed sand or the ceramic crushed particles is too small, and the crushed sand or the ceramic crushed particles may be detached.

When the traffic volume is L traffic, the ratio of cinnabar sand or ceramic pulverized grains is preferably 10 to 250 parts by mass when 100 parts by mass of cement, gypsum and synthetic resin emulsion solids are mixed. More preferably, it is 15-150 mass parts, Most preferably, it is 20-120 mass parts. When in this range, the pavement material is excellent in wear resistance and retention of dredged sand or ceramic crushed grains even if the traffic volume is L traffic. In the case where the traffic volume is L traffic, when the ratio of dredged sand or ceramic pulverized grains is less than 10 parts by mass when the mixture of cement, gypsum and solid content of synthetic resin emulsion is 100 parts by mass, paving The wear resistance of the material is not sufficient. On the other hand, when the amount exceeds 250 parts by mass, the amount of the binder that holds the crushed sand or the ceramic crushed particles is too small, and the crushed sand or the ceramic crushed particles may be detached.

^{L *} values in the CIE ^L * ^a * ^{b *} color system of the layer the paving material is cured by construction is preferably 35-80, more preferably 45-75, most preferably 50-70. When the lightness of the pavement is in this range, the temperature rise on the road surface can be suppressed, so that deformation due to heat can be suppressed. When the lightness of the road surface after the pavement material is constructed is less than 35, the amount of sunlight absorbed by the road surface is large. Therefore, when the traffic volume increases in the state where the surface temperature of the asphalt pavement rises in summer, etc., the asphalt pavement May be fluidized by heat and deformed. Conversely, when the lightness of the pavement exceeds 80, the automobile driver may feel glare due to the reflection of sunlight.

When constructing the pavement material at a temperature of 5 ° C. or less, it is preferable to construct the pavement material after mixing calcium oxide with the pavement material. When the pavement material is mixed with calcium oxide and then applied, the pavement material generates heat due to the hydration reaction of calcium oxide, and the hardening of the cement and gypsum in the pavement material composition can be promoted.

When the calcium oxide is mixed, the mixing ratio of calcium oxide is preferably 5 to 20 parts by mass, more preferably 8 to 15 parts by mass, and most preferably 10 to 12 parts by mass with respect to 100 parts by mass of the paving material. is there. When it is within this range, calcium oxide can effectively generate heat even at a low temperature to accelerate the curing of the pavement material. When the proportion of calcium oxide relative to 100 parts by mass of the pavement is less than 5 parts by mass, heat generation due to hydration of calcium oxide is not sufficient, and it is difficult to obtain the effect of promoting hardening. On the other hand, when it exceeds 20 parts by mass, the fluidity of the paving material is impaired, and the surface smoothness may be lowered.

When the pavement material is applied at a low temperature of 5 ° C. or less, it may be applied after mixing the metal powder such as iron powder and aluminum powder, the oxidation accelerator such as activated carbon, and sodium chloride into the pavement material. . Even if comprised in this way, hardening of the cement and gypsum in a paving material composition can be accelerated | stimulated by exothermic reaction.

The metal powder is not limited to iron powder and aluminum powder, and can be arbitrarily set. For example, stainless steel powder, copper powder, etc. are mentioned.

The oxidation accelerator is not limited to activated carbon and can be set arbitrarily. For example, potassium permanganate, sodium permanganate, ammonium permanganate, permanganate such as zinc permanganate, sodium peroxide, lithium peroxide, di-tert-butyl peroxide, acetone peroxide, peroxide Examples thereof include peroxides such as benzoyl, nitrates such as potassium nitrate and cerium ammonium nitrate, and sodium hypochlorite.

When the iron powder is 100 parts by mass, the mixing ratio of activated carbon and sodium chloride is preferably 5 to 15 parts by mass of activated carbon and 5 to 15 parts by mass of sodium chloride. When it is within this range, sufficient heat generation can be obtained.

The average particle diameter of the activated carbon is preferably 10 to 120 μm, more preferably 20 to 100 μm, and most preferably 50 to 70 μm. When it is in this range, oxidation proceeds easily and sufficient heat generation is obtained.

The sodium chloride is preferably mixed in the form of an aqueous solution after mixing cement, gypsum and a synthetic resin emulsion. By mixing in this way, the formation of aggregates can be suppressed.

The metal powder is preferably added with or after mixing cement, gypsum, and synthetic resin emulsion. By adding in this way, it can suppress that metal powder oxidizes in a storage state.

As used in the composition of the pavement, water loss such as lignin sulfonate, oxy organic acid salt, alkylallyl sulfonate melamine sulfonate formalin high condensate Na salt, naphthalene sulfonate formaldehyde high condensate Na salt, etc. Agents, hardening agents such as sodium aluminate, sodium carbonate, calcium chloride, potassium sulfate, calcium nitrate, retarders such as lignin sulfonate, lactic acid, tartaric acid, citric acid, dispersants, wetting agents, thickeners, Examples include antifoaming agents, antiseptics, antifungal agents, rust inhibitors, waterproofing agents, swelling agents, antiwear agents, fiber, texanol, PnB, DPnB and other film-forming aids. These can be used as long as the effects of the present invention are not impaired. Moreover, these can be previously mixed with any one or more of cement, gypsum, and a synthetic resin emulsion.

The paving material configured as described above is used as follows.
Asphalt paved traffic volume of 300 cars / day / direction, 15m wide, the surface of the main road will be paved. The pavement material is 100 parts by weight of white Portland cement as cement, 300 parts by weight of hemihydrate gypsum as gypsum, 100 parts by weight of acrylic resin emulsion as synthetic resin emulsion, 500 parts by weight of silica sand, 1 part by weight of antifoaming agent, thickening 1 part by weight of the agent, and cement, gypsum, cinnabar sand, and thickener are mixed in advance at the factory, and a single powder (hereinafter referred to as “main material”) is stored in a paper bag as a container. Provided housed. Further, the synthetic resin emulsion and the antifoaming agent are mixed in advance at a factory, and are provided as a single liquid (hereinafter referred to as “mixed liquid”) accommodated in a plastic container as a storage container.

First, the mixed solution is put into a metal pail can as a kneading container. Subsequently, the main material is gradually added while stirring with a hand mixer as a stirrer. The mixture is stirred for 10 to 30 seconds. When the mixture of the main material and the mixed solution becomes uniform, the stirring is stopped, and spray coating is performed with an average thickness of 1 mm using a ricin gun having a tip diameter of 6 mm as a construction tool. It is allowed to stand for 60 minutes after painting is completed, and the vehicle can be passed by removing the curing.

When the asphalt pavement is a water-permeable pavement, spray coating is preferably performed. By performing the spray construction, it is possible to prevent the pavement material from completely filling the voids of the water-permeable pavement, and thus it is possible to suppress a decrease in water permeability of the water-permeable pavement.

The asphalt paved road is not limited to a main road, and can be arbitrarily set as long as it is an asphalt paved road.

The kneading container is not limited to a metal pail can but can be arbitrarily set. For example, a plastic pail can can be used. A mortar mixer that also serves as a kneading container and a stirrer can be used.

The stirrer is not limited to a hand mixer, and can be arbitrarily set as long as it can mix a main material and a mixed liquid. For example, a mortar mixer, a propeller mixer, a concrete mixer truck, etc. are mentioned.

At the time of mixing the main material and the admixture, it is preferable to add the main material while stirring after the admixture is introduced into the kneading vessel. By mixing in this way, the paving material can be mixed uniformly.

When mixing the main material and the admixture, water may be added for adjustment. Moreover, you may provide this water in the state mixed in the liquid mixture beforehand.

The stirring time is preferably 10 to 360 seconds, more preferably 20 to 180 seconds, and most preferably 30 to 120 seconds. When in this range, the paving material can be mixed uniformly. When the stirring time is less than 10 seconds, it is difficult to mix the paving material uniformly. Conversely, when it exceeds 360 seconds, the hardening reaction of cement and gypsum proceeds particularly in the summer, so that it can be used sufficiently. It becomes difficult to get time.

The construction tool is not limited to a lysing gun, and a normal construction tool can be used. For example, a plunger type pressure feeder, a snake pump pressure feeder, a pressure pump such as a rotary pump pressure feeder, a roller such as a wool roller or a porous roller, a trowel, a spatula, a scraper, a universal gun, a brush and the like can be mentioned.
The tip diameter of the ricin gun is preferably 4 mm to 10 mm, more preferably 6 mm to 8 mm. When in this range, uniform work can be done quickly.

It is preferable that the time until the vehicle can pass after the construction of the paving material is 30 minutes to 90 minutes. When in this range, construction can be performed while maintaining smooth traffic. When the time until the vehicle can pass is less than 30 minutes, the pavement material is not sufficiently cured and may be scraped off by the vehicle. Conversely, if it exceeds 90 minutes, there is a risk of hindering smooth traffic.

This embodiment can exhibit the following effects.
-It is excellent in sclerosis | hardenability, durability, and crack resistance because the thickness of the said pavement material is 0.5 mm-2.5 mm.

・ By using one or more of ordinary Portland cement, early-strength Portland cement, and ultra-early-strength Portland cement as the cement, it becomes easy to adjust the curing speed by mixing with gypsum, and the color of the paving material can be adjusted. Since it is possible to reduce the amount of iron oxide or carbon black used as a colorant when trying to approach the color tone of asphalt pavement, the solar reflectance can be kept low. By reducing the solar reflectance, it is possible to suppress an increase in road surface temperature in summer, and therefore, deformation of asphalt pavement can be suppressed.

When white Portland cement is used as the cement and hemihydrate gypsum is used as the gypsum, the mixing ratio of white Portland cement to 100 parts by mass of hemihydrate gypsum at an external temperature of T ° C. is 0.3 × T ^1.2 to 2. By 5 × T ^1.2 (however, T> 0), the road can be opened within 90 minutes after the completion of construction regardless of the outside temperature.

When the ordinary Portland cement specified in JIS R5210 is used as the cement as the cement, and the half water gypsum is used as the gypsum, the mixing ratio of the ordinary Portland cement with respect to 100 parts by mass of hemihydrate gypsum at the external temperature T ° C is 0. By being 1 × T ^{1.2 to} 2.0 × T ^1.2 (where T> 0), the road can be opened within 90 minutes after the completion of construction regardless of the outside temperature.

・ Since the colored sand or ceramic pulverized grains are colored, even if the binding material is worn due to traffic, colored colored sand or ceramic pulverized grains appear on the surface of the pavement, thereby suppressing color change due to wear of the pavement material. can do.

In addition, the said embodiment of this invention can also be changed and comprised as follows.
In the embodiment, cement, gypsum, cinnabar sand, and thickener are mixed in advance among the components constituting the pavement material, and then carried into the construction site, but these may be carried separately. Further, only some components such as cement and gypsum, cement and cinnabar, etc. may be mixed in advance and used.

In the embodiment, among the components constituting the pavement material, the synthetic resin emulsion and the antifoaming agent are mixed in advance and then carried into the construction site, but these may be carried separately. Moreover, you may mix and use previously the other structural component which does not raise | generate a hydration reaction with a synthetic resin emulsion, such as a synthetic resin emulsion and cinnabar.

-Although spray coating was performed in the said embodiment, you may carry out by roller coating.
By comprising in this way, scattering of the pavement material to the circumference | surroundings can be suppressed.

・ When constructing the above pavement material on water-permeable asphalt pavement, use mixed fibers or small pieces with large voids such as straw, cork, charcoal, cellulose fiber, citrus, wood chip, straw chip, etc. Is preferred.
By comprising in this way, deterioration by rainwater, sunlight, air, etc. of asphalt pavement can be suppressed, maintaining water permeability.

Next, technical ideas other than the invention described in the claims ascertained from the embodiment will be described together with their effects.
(1) When white Portland cement is used as cement and hemihydrate gypsum is used as gypsum, the mixing ratio of white Portland cement with respect to 100 parts by mass of hemihydrate gypsum at an external temperature T ° C. is 0.3 × T ^1.2 to 2 The pavement material according to claim 1, wherein ^0.5 × T ^1.2 (where T> 0).
When comprised in this way, a road can be opened within 90 minutes after completion of construction irrespective of outside temperature.

Hereinafter, examples and comparative examples embodying the embodiment will be described.
The test is performed on the surface of a 300 mm × 300 mm × 50 mm thick asphalt pavement plate, and the paving materials shown in Tables 1 to 9 are average thicknesses of 0.3 mm, 0.7 mm, 1.2 mm, 2.0 mm, 3 mm with a wool roller. It was painted to 0.0 mm and left in a constant temperature bath at 5 ° C., 23 ° C. and 40 ° C. for 60 minutes. After confirming the cured state, the specimen was placed in a constant temperature bath at room temperature and 60 ° C., and a load of 490 N / cm ² was applied to the surface to observe the surface condition of the specimen. Further, in order to confirm the followability of the pavement material to asphalt pavement, the same specimen was immersed in water for 16 hours as a freeze-thaw test, and then frozen in a -20 ° C constant temperature bath for 3 hours, followed by 50 ° C. The surface state of the test specimen was observed by repeating the cycle of standing in a thermostat for 3 hours for 10 cycles. The same pavement material was spray-painted on an actual asphalt road surface with a ricin gun, and the state of the road surface was observed by reciprocating a 4t truck 100 times. Here, in the table, the term “synthetic resin emulsion” indicates the solid content (nonvolatile content) of the synthetic resin emulsion unless otherwise specified.

Table 10 shows the results of the load test with a 300 × 300 mm specimen, Table 11 shows the results of the cured state after 60 minutes of construction with the same 300 × 300 mm specimen, and Table 12 shows the results of the freeze-thaw test. Table 13 shows the results on the asphalt road surface. The test results in Table 10 are indicated as “O” when there is no abnormality, “Δ” when the dent is generated on the surface of the test body, and “X” when the surface of the test body is markedly depressed. The test results in Table 11 were evaluated as ◯ when the curing was sufficient, Δ when the surface of the test body was dented by finger touch, and x when the paving material adhered to the finger when touched. The test results in Table 12 were evaluated as ○ when there was no abnormality on the surface of the test body, Δ when a slight crack was generated in the pavement material, and X when a significant crack was generated in the pavement material. In the test results of Table 13, the case where the surface was not contaminated or slight was evaluated as ◯, and the case where the surface was significantly contaminated was evaluated as x. In Tables 10 to 12, those that could not be applied to the specified thickness due to the size of the cinnabar sand or ceramic pulverized grains, or because the curing speed was too fast are represented by-.

Claims (2)

A pavement that is laminated on the surface of an asphalt pavement for use on a roadway to a thickness of 0.5 to 2.5 mm, and the pavement is composed of cement, gypsum, and a glass transition point of -15 to 50 ° C. A pavement characterized by being formed by mixing a resin emulsion and cinnabar or ceramic pulverized grains having an average particle size of 0.5 to 1.5 mm. The pavement material according to claim 1, wherein a mixing ratio of cement and gypsum in the pavement material is changed depending on an outside air temperature during construction.