JP6924632B2 - Road repair material - Google Patents

Description

The present invention relates to a road repair material.

In recent years, asphalt roads have become heavy vehicles and traffic volume has increased, and if potholes are created due to road surface damage on asphalt roads, they may obstruct the passage of people or damage the tires and wheels of vehicles. Potholes on the road need to be repaired.

As conventional road repair materials, heated asphalt repair materials and room temperature curing type asphalt repair materials are known as asphalt-based repair materials. A room temperature curing type asphalt repair material has been proposed as an asphalt mixture that can be constructed at room temperature and exhibits high strength at an early stage after construction (Patent Document 1). As the cement-based repair material, a hard-hardening mortar repair material containing cement, calcium aluminate, gypsum, fine aggregate, and a polymer for cement has been proposed (Patent Documents 2, 3, and 4). In both cases, it is necessary to close the road and repair in a short time within 30 minutes, so a repair material having high strength development in a short time is required. For example, according to the civil engineering material specifications and the standard of the simple pothole running test of the Tokyo Metropolitan Government Bureau of Construction, the number of running times when sinking 3 mm is 30 times or more. It is desirable to make it mm ^{2 or more.} In addition, the long-term compressive strength of general Alfalto pavement materials is ^{about 15 N / mm 2} , but cement-based repair materials use Portland cement as the main material and lower the water-cement ratio in order to increase the strength for a short time. Use a mortar with a different composition. Therefore, the long-term strength is about three times higher than that of Alfalto pavement material, and the entire pavement is not evenly worn, and the part repaired with the cement-based repair material may remain and chip or peel off and scatter. , It is easy to obstruct the passage of people and vehicles. Therefore, a repair material that does not exhibit excessive strength for a long period of time has been proposed (Patent Document 5). Further, it has been proposed to transport a pre-produced mortar by vehicle and add a quick-setting material to the divided mortar to produce a fast-acting mortar (Patent Document 6). However, if the size of the potholes formed on the road is small and scattered, it takes time to subdivide the mortar, and when repairing a sloping road, the mortar filled in the potholes flows and smoothes the sloping surface. There was a problem that it could not be repaired.

JP-A-2010-248472 Japanese Unexamined Patent Publication No. 2013-136477 Japanese Unexamined Patent Publication No. 5-330875 Japanese Unexamined Patent Publication No. 2005-008501 Japanese Unexamined Patent Publication No. 2015-074945 JP-A-2015-105492

Conventional cement-based repair materials have high compressive strength for short-term material age, but the compressive strength for long-term material age is excessively higher than the compressive strength of pavement material, and the strength difference from asphalt pavement material becomes large, resulting in repair. There is a problem that the passage of people and vehicles is likely to be hindered, such as the remaining part remaining and chipping or peeling off and scattering. In addition, when small potholes are scattered on the road or when repairing a sloping road, the repair takes time and it is necessary to close the road for a long time.
The present invention solves the above problems, allows the pothole to be easily filled with mortar without soiling the hands of the operator, and even if the pothole is fast-acting and has high strength for a short time, long-term strength is suppressed and adhesion to the pavement material is suppressed. Provide road repair materials with good properties.

That is, the present invention is, (1) cement, vitrification ratio of 70% or more, calcium aluminate is CaO / _Al 2 _{O 3} molar ratio of 1.5 to 2.3, Blaine specific surface area of 3000 cm ² / g or more Premixed material containing plaster, alkaline earth metal hydroxide, plasticizer, inorganic fine powder and aggregate, and road repair material made of polymer latex (2) Further, a partition in one bag The repair method is characterized in that the premix material of (1) and the polymer latex are separately packed, the partition is removed and mixed immediately before use, and the repaired portion of the road is filled.

According to the present invention, it is possible to obtain a road repair material having fast hardness, high short-time compressive strength, long-term compressive strength comparable to that of asphalt pavement material, and good adhesiveness.

Hereinafter, the present invention will be described in detail.
In the present invention, all parts and% are based on mass unless otherwise specified.

The cement used in the present invention includes various commercially available Portland cements such as ordinary, early-strength, moderate-heat, and ultra-fast-strength, and various mixed cements obtained by mixing these various Portland cements with fly ash, blast furnace slag, and the like. It is also possible to use these as fine powders.

_{The calcium aluminate used in the present invention contains CaO and Al 2} O ₃ as main components, which are obtained by mixing a calcia raw material and an alumina raw material and firing them in a kiln, or melting and cooling them in an electric furnace. It is a general term for substances having hydration activity, and is a material having a fast curing time and high initial strength development.
The calcium aluminate of the present invention is, for example, an amorphous calcium aluminate in which a mixture of a calcia raw material and an alumina raw material is melted and then rapidly cooled because it is cured in a shorter time than alumina cement and has a high initial strength development property thereafter. Is preferred.
The molar ratio of CaO of the calcium aluminate of the present invention to Al ₂ O ₃ (CaO / Al ₂ O ₃ molar ratio) is preferably 1.5 to 2.3, more preferably 2.0 to 2.1. If it is less than 1.5, it takes time to cure, while if it exceeds 2.3, it may cure too quickly.

_{SiO 2} may be contained in addition to _{CaO and Al 2} O ₃ which are the components of the calcium aluminate of the present invention, _{but the SiO 2} content should be 10% or less for the strength development at short-term age. From the point of view, it is preferable, and more preferably 5% or less. If it exceeds 10%, the curing time is long and it may not harden at low temperature.
_{In addition to SiO 2} , the calcium aluminate of the present invention includes alkali metal oxides, alkaline earth metal oxides, titanium oxide, iron oxide, alkali metal halides, alkaline earth metal halides, alkali metal sulfates, etc. And alkaline earth metal sulfate and the like may be partially contained, and the present invention is not particularly limited.
The vitrification rate of the calcium aluminate of the present invention is preferably 70% or more, more preferably 90% or more in terms of reaction activity. If it is less than 70%, the strength development of short-time material age may decrease.

To measure the vitrification rate of calcium aluminate, the main peak area S of the crystalline mineral is measured in advance by powder X-ray diffraction method for the sample before heating, and then heated at 1000 ° C. for 2 hours and then cooled at 1 ° C./min. _{The main peak area S 0} of the crystalline mineral after heating by the powder X-ray diffraction method is obtained, and the vitrification rate χ is calculated by the following formula using the values of _{S 0 and S.}
Vitrification rate χ (%) = 100 × (1-S / S ₀ )

The particle size of the calcium aluminate of the present invention, in terms of strength development of short ages, higher Blaine specific surface area 3000 cm ² / g is preferable, 5000 cm ² / g or more is more preferable. If it is less than 3000 cm ² / g, the strength development of short-term material age may decrease.

Examples of the gypsum of the present invention include hemihydrate gypsum and anhydrous gypsum, and anhydrous gypsum is preferable from the viewpoint of developing strength for a short period of time. Hydrous acid by-product anhydrous gypsum and natural anhydrous gypsum can be used. The pH when the gypsum is immersed in water is preferably weakly alkaline to acidic with a pH of 8 or less. When the pH is high, the solubility of the gypsum component becomes high, which may hinder the strength development of short-term material age. The pH referred to here is the pH of a diluted slurry of gypsum / ion-exchanged water = 1/100 measured at 20 ° C. using an ion-exchange electrode or the like.

The particle size of the gypsum of the present invention is preferably 3000 cm ² / g or more in Blaine specific surface area value, 5000 cm ² / g or more, more preferably from the viewpoint of the strength development and proper working time of short ages obtained.
The amount of gypsum used in the present invention is preferably 40 to 150 parts with respect to 100 parts of calcium aluminate. If the number of parts is less than 40, the working time may not be obtained and the strength development may be lowered. On the other hand, if the number of parts exceeds 150, the working time can be sufficiently taken, but the strength of the short-time material age may not be obtained.

The ratio of the hard-hardening material composed of calcium aluminate and gypsum is preferably 20 to 150 parts with respect to 100 parts of cement. If it is less than 20 parts, the strength development of short-time material age may decrease. On the other hand, even if it exceeds 150 parts, the strength of the short-time material age may not be obtained.

The alkaline earth metal hydroxide used in the present invention is calcium hydroxide and magnesium hydroxide, and is not particularly limited. Generally, calcium hydroxide is preferred.
The proportion of the alkaline earth metal hydroxide used in the present invention is not particularly limited, but is preferably 1 to 10 parts, more preferably 3 to 7 parts, based on 100 parts in total of calcium aluminate and gypsum. .. If the amount of the alkaline earth metal hydroxide is less than 1, the strength development of the short-time material age may be low, while if it exceeds 10 parts, efflorescence is likely to occur on the surface of the cured product and it is easy to expand, which is preferable. No.

The plasticizer used in the present invention imparts great plasticity to the kneaded mortar, and makes it possible to finish the mortar smoothly without flowing out from the slope when repairing a pothole formed on a slope. Specifically, powdered aluminum sulfate, and one or more clay minerals such as bentonite, sepiolite, and zeolite can be used as long as the object of the present invention is not substantially impaired.
The proportion of the plasticizer used in the present invention is not particularly limited, but in the case of powdered aluminum sulfate, 1 to 5 parts is preferable with respect to 100 parts in total of calcium aluminate and gypsum, and 2 to 4 parts are preferable. More preferable. If less than 1 part, the plasticity of the mortar may be weakened, while if it exceeds 5 parts, the plasticity becomes too strong, and when the premix material and the polymer latex are kneaded, the viscosity becomes too high and the kneading in the bag becomes too strong. It may be difficult to fill the pot hole. In the case of clay minerals such as bentonite, 1 to 20 parts are preferable, and 5 to 10 parts are more preferable, based on a total of 100 parts of calcium aluminate and gypsum. If it is less than 1 part, the plasticity of the mortar may be weakened, and if it exceeds 20 parts, the plasticity becomes too strong, and when the premix material and the polymer latex are kneaded, the viscosity becomes too high and it is difficult to knead in the bag. , It may be difficult to fill the pot hole, and the strength development of short-term material age may decrease.

In the present invention, limestone fine powder, fly ash, and blast furnace slag fine powder can be used as the inorganic fine powder. The upper limit of the particle size of the inorganic fine powder is preferably 150 μm or less, more preferably 100 μm or less, and most preferably 80 μm or less. If it exceeds 150 μm, the strength development of short-term material age may decrease. Further, the lower limit of the particle size of the inorganic fine powder is not particularly limited, and particles of 1 μm or less may be present. The average particle size of the inorganic fine powder is not particularly limited, but is preferably 10 to 80 μm.

The aggregate used in the present invention is preferably a natural dried fine aggregate, and any of a lightweight aggregate and a regenerated aggregate is possible. The particle size is not particularly limited, but is preferably within the standard particle size range of the Japan Society of Civil Engineers for fine aggregates.
The ratio of the aggregate and the inorganic fine powder of the present invention is preferably 400 to 800 parts in total with respect to 100 parts in total of cement, calcium aluminate and gypsum. When the amount used is less than 400 parts, the strength development of the short-term material age is high, but the long-term strength development may also be high, while when it exceeds 800 parts, the strength development of the short-term material age is low and the surface. May be less durable. The ratio of the inorganic fine powder is preferably 5 to 30 parts out of a total of 100 parts of the aggregate and the inorganic fine powder. If it is less than 5 parts, it is difficult to obtain plasticity and the strength development of short-time material age may be low, while if it exceeds 30 parts, the flow value of mortar becomes low and it may be difficult to fill the pothole. ..

Examples of the polymer latex of the present invention include polymers for cement admixture specified in JIS A 6203, such as polymer dispersions in which polymer fine particles are dispersed in water, and stabilizers added to rubber latex and resin emulsion. It is a general term for re-emulsified powder resin obtained by drying latex.
For example, rubber latex such as acrylonitrile-butadiene rubber, styrene-butadiene rubber, chloroprene rubber, and natural rubber, ethylene / vinyl acetate copolymer, polyacrylic acid ester, vinyl acetate vinyl versatate copolymer, and styrene / acrylic. Examples thereof include acid ester copolymers, acrylic acid ester-based copolymers represented by acrylonitrile / acrylic acid esters, epoxy resins, and liquid polymers represented by unsaturated polyester resins, and one or more of these may be used. Can be used. These can be used in liquid form or powder form, and are not particularly limited.

Further, in the present invention, an asphalt emulsion can be used for the purpose of imparting viscoelasticity and improving impact such as vibration.
An asphalt emulsion is a colloidal liquid obtained by dispersing fine particles of asphalt containing a bituminous substance as a main component, which is obtained as a natural or petroleum distillation residue, in water. The main material is straight asphalt of about 200/500, to which a surfactant and a polyvalent metal salt are added, and if necessary, an emulsifying aid, a dispersant, a protective colloid, etc. are appropriately used in water. It is emulsified in.
It is also possible to use an emulsified version of the modified bituminous product by adding / mixing rubber, a synthetic polymer polymer, or the like to the bitumen product.
The bituminous content in the asphalt emulsion is preferably 40 to 70%, more preferably 55 to 65%. If it is less than 40%, the effect of imparting viscoelasticity to the repair material may not be obtained, while if it exceeds 70%, the strength development may decrease. These can be used in liquid form or in bulk form, and are not particularly limited.

The mixing ratio of polymer latex is 1 to 100 parts of premix material containing semet, calcium aluminate, gypsum, alkaline earth metal hydroxide, plasticizer, inorganic fine powder and aggregate in terms of solid content. 10 parts is preferable. If it is less than one part, the drying shrinkage is large, the adhesion strength may be low, and the long-term strength tends to be high. On the other hand, if it exceeds 10 parts, it is difficult to obtain the fluidity of the mortar, the strength development of short-term and long-term material age is low, the drying shrinkage rate is small, and the adhesion strength tends to be high.
In order to obtain fluidity suitable for construction of the road repair material of the present invention, it is preferable to adjust the fluidity by appropriately adding water when the water content derived from the polymer latex is insufficient.

In the present invention, it is possible to use a coagulation modifier. The coagulation adjuster is not particularly limited as long as it promotes or delays the coagulation of cement. Specifically, alkali hydroxide, alkali metal chloride salt, alkali metal carbonate, oxycarboxylic acid or its salt, phosphoric acid or its salt, dextrin, sucrose, polyacrylic acid or its salt, naphthalene or melamine. It is possible to use one or more water reducing agents typified by a system, an aminosulfonic acid system, a polycarboxylic acid system, a polyether system, etc., as long as the object of the present invention is not substantially impaired.

In the present invention, it is possible to use a rubber chip. As the rubber chip, natural rubber, styrene-butadiene rubber, chloroprene rubber, butadiene rubber, acrylonitrile-butadiene rubber, silicone rubber, ethylene propylene rubber, fluororubber, isoprene, isoprene rubber and the like can be used. In particular, natural rubber is preferable, and those containing 50% or more of natural rubber and those obtained by cutting waste tires have good elasticity and are particularly preferable. The particle size is preferably 0.1 to 3 mm from the viewpoint of improving elasticity and frost damage resistance, and more preferably 0.5 to 2 mm. If it is less than 0.1 mm, it is difficult to crush it, which increases the cost and is not economical. Further, since it is difficult to pave, a large amount of kneading water is required, and the strength development tends to decrease. On the other hand, if it exceeds 3 mm, the rubber chip tends to peel off from the surface after pavement, which is not preferable in terms of durability.
The amount of the rubber chip used in the present invention is preferably 5 to 15 parts with respect to 100 parts of the road repair material. If it is less than 5 parts, elasticity and frost resistance may decrease. On the other hand, even if it exceeds 15 copies, a further effect may not be obtained.

In the present invention, admixture materials such as defoaming agents, water reducing agents, thickeners, rust preventives, and antifreeze agents, short fibers such as vinylon fibers, polypropylene fibers, and glass fibers having a length of 10 mm or less, colorants, and the like are used. One or more of them can be used within a range that does not substantially impair the object of the present invention.

Next, the repair method in the present invention will be described.
The method of constructing the road repair material according to the present invention is not particularly limited. For example, a partition is provided in one bag, the premix material and the polymer latex are packed separately, and the partition is formed immediately before use. It can be removed and used by shaking or shaking the bag evenly without using a special machine. The road repair material according to the present invention can be poured into, for example, a pothole of a road or a crack of a pavement material, and the surface can be leveled with a trowel before hardening and can be applied in a short time. Can be limited.

Hereinafter, description will be given based on an experimental example of the present invention.

(Experimental Example 1)
A hard-hardening material containing 100 parts of gypsum A to 100 parts of calcium aluminate was added to 100 parts of cement in different proportions as shown in Table 1, and alkaline soil was added to 100 parts of calcium aluminate and gypsum in total. Metal hydroxide A 5 parts, plasticizer A 3 parts, cement, calcium aluminate and gypsum total 100 parts, aggregate and inorganic fine powder A total 600 parts (total 100 parts of aggregate and inorganic fine powder) 15 parts of medium-inorganic fine powder A) was mixed to prepare a premix material.
This premix material is packed in a plastic bag, and for 100 parts of the premix material, 3 parts of polymer latex A is converted into solid content, 0.1 part of coagulation adjuster, and the amount of water and water in the polymer latex A. Water was added so that the total of 18 parts was 18 parts, and the road paving material was prepared by hand mixing in a bag for 15 seconds. Table 1 shows the measurement results of curing time and compressive strength.

<Material used>
Cement: Ordinary Portland cement, commercially available calcium aluminate: Calcium carbonate and aluminum oxide were used as raw materials. CaO / _Al 2 _{O 3} molar ratio of 2.1, furthermore, silica was added (SiO ₂₎ 3%, after melting at 1650 ° C., and cooled to prepare a calcium aluminate 97% glass ratio. Brain specific surface area value 5000 cm ²
Gypsum A: Natural anhydrous gypsum, brain specific surface area value 5000 cm ² / g
Alkaline earth metal hydroxide A: Calcium hydroxide, Commercial product Plastic agent A: Powdered anhydrous aluminum sulfate, Commercial product Aggregate: Niigata prefecture river sand dried product, 1.2 mm under-sieving inorganic fine powder A: Limestone fine powder 100 Mesh product, commercial product Coagulation adjuster: anhydrous citrate, commercial product polymer latex A: SBR emulsion, solid content concentration 40%, commercial product water: tap water

<Measurement method>
Curing time: The mixture was kneaded in an environment of 20 ° C. and a relative humidity of 80%, and the time until the finger did not enter the surface of the repair material was measured.
Compressive strength: Kneaded in an environment of 20 ° C. and 80% relative humidity, filled in a mold and cured. The intensities 30 minutes and 28 days after kneading were measured according to JIS R5201. The 28-day strength of the material was measured by air-dry curing for 24 hours in an environment of 20 ° C. and 80% relative humidity, and then underwater curing at 20 ° C.

From Table 1, it can be seen that the road repair material of the present invention has an excellent fast-acting property, has good strength development in a short time, and suppresses long-term strength development as compared with a cement-based repair material. ..

(Experimental Example 2)
70 parts of a hard-hardening material composed of calcium aluminate and gypsum was added to 100 parts of cement. As shown in Table 2, the same procedure as in Experimental Example 1 (Experiment No. 1-5) was carried out except that the type of calcium aluminate was changed and the type and addition ratio of gypsum to 100 parts of calcium aluminate were changed. The results are shown in Table 2.

<Material used>
Calcium aluminate: Calcium carbonate and aluminum oxide were used as raw materials. Changing the CaO / _Al 2 _{O 3} molar ratio, further silica 3% was added and melted at 1650 ° C., by adjusting the cooling rate, vitrification 62%, 70%, 88% calcium aluminate Prepared. Brain specific surface area value 5000 cm ²
Gypsum B: Semi-hydrated gypsum, commercial product, brain specific surface area value 4800 cm ² / g

(Experimental Example 3)
Experimental Example 1 except that the calcium aluminate used in Experimental Example 1 was used and the types and amounts of alkaline earth metal hydroxides and plasticizers were changed for a total of 100 parts of calcium aluminate and gypsum. The procedure was the same as in (Experiment No. 1-5). The flow value was also measured. The results are shown in Table 3.

<Material used>
Alkaline earth metal hydroxide B: Magnesium hydroxide, Commercial product Plasticizer B: Bentonite, Commercial product <Measurement method>
Flow value: Fill the flow cone for JIS R5201 with mortar, measure the static flow value before hitting and the flow value after 15 hits in accordance with JISR5201 and divide the flow value after hitting by the static flow value. The plasticity ratio was calculated.

From Table 3, it can be seen that the road repair material of the present invention exhibits excellent physical characteristics. By blending an alkaline earth metal hydroxide, the strength development in a short time is enhanced, and by blending a plasticizer, the plasticity ratio is increased and strong plasticity can be imparted.

(Experimental Example 4)
The amount of gypsum A is 100 parts with respect to 100 parts of calcium aluminate used in Experimental Example 1, the total amount of aggregate and inorganic fine powder with respect to 100 parts of cement, calcium aluminate and gypsum in total, and the inorganic fine powder. The procedure was carried out in the same manner as in Experimental Example 1 (Experiment No. 1-5) except that the amount of inorganic fine powder used in 100 parts in total of 100 parts of aggregate and inorganic fine powder was changed at the ratio shown in Table 4. The results are shown in Table 4.

<Material used>
Inorganic fine powder B: Flaash II type, Hokuriku Electric Power Co., Ltd. Inorganic fine powder C: Blast furnace slag fine powder, Brain specific surface area value 3200 cm ² / g

From Table 4, it can be seen that the road repair material of the present invention exhibits excellent physical characteristics. It can be seen that the strength for a short time is improved by blending the inorganic fine powder.

(Experimental Example 5)
The amount of gypsum A is 100 parts with respect to 100 parts of calcium aluminate used in Experimental Example 1, and 5 parts of alkaline earth metal hydroxide and 3 parts of plasticizer A are made with respect to a total of 100 parts of calcium aluminate and gypsum. , A premix material in which the total of aggregate and inorganic fine powder is 600 parts, and the total of 100 parts of aggregate and inorganic fine powder is 15 parts of the total of 100 parts of cement, calcium aluminate and gypsum. Was prepared according to Experiment No. 1-5. The type and amount of polymer latex added (in terms of solid content) were changed with respect to 100 parts of the premix material at the ratio shown in Table 5, and the amount of water and water added to the polymer latex was changed with respect to 100 parts of the premix material. The procedure was carried out in the same manner as in Experimental Example 1 (Experiment No. 1-5) except that the road repair material was prepared by adding a total of 18 parts. Furthermore, the drying shrinkage rate and the adhesion strength were measured. The results are shown in Table 5.

<Material used>
Polymer Latex B: EVA emulsion, solid content concentration 40%
<Measurement method>
Dry shrinkage rate: Based on JIS A 1129-3 mortar and concrete length change test method and dial gauge method, the length after 28 days from the age of 1 day in an environment of temperature 20 ° C and humidity 60%. The rate of change was measured.
Adhesive strength: An asphalt pavement material paved to a thickness of 10 cm on a concrete plate of 40 × 40 cm was cored with a diameter of 65 mm and a depth of 30 mm, the sides other than the bottom surface were covered with vinyl, and road repair material was poured and filled. After curing for 28 days in an environment of 20 ° C and 80% relative humidity, the jig is adhered to the upper surface of the repair material with epoxy resin, the tensile load is measured with a Kenken adhesive strength tester, and the adhesive strength is determined by the following formula. I asked.
Adhesive strength = tensile load N / 7850mm ²
For comparison, a hard mortar was prepared using ordinary cement, calcium aluminate of Experiment No. 1-5 of Experimental Example 1, and gypsum A. For the mortar formulation, the ratio (mass ratio) of aggregate and ordinary Portland cement of Experiment No. 1-5 was 2/1, and the mixture of calcium aluminate and gypsum A of Experimental Example 1-5 (mass ratio 1/1). Add 20 parts to ordinary Portland cement by internal division, add 18 parts of water and 0.1 part of citric acid to 100 parts of all materials of ordinary cement, calcium aluminate, gypsum and aggregate, and knead to harden. Mortar was prepared. The results are shown in Table 5.

From Table 5, it can be seen that the road repair material of the present invention has a small drying shrinkage rate and is excellent in adhesiveness by mixing the polymer latex. The comparative hard mortar has high strength for a short time, but the strength is too high at 28 days of age, and the strength difference from the asphalt pavement material becomes large. Therefore, it can be seen that the entire pavement is not uniformly worn, and the portion repaired with the hard mortar may remain and be chipped or peeled off and scattered.

The road repair material of the present invention provides a repair material that is quick-hardening and has a high compressive strength for a short period of time, so that the road can be opened early, the long-term compressive strength is suppressed, and the adhesiveness to the pavement material is excellent. Is possible, and it is preferably used mainly in the road field.

Claims (4)

Cement, vitrification ratio of 70% or more, calcium aluminate CaO / _Al 2 _{O 3} molar ratio of 1.5 to 2.3, is Blaine specific surface area of 3000 cm ² / g or more, gypsum, an alkaline earth metal hydroxide things, plasticizers, premix material comprising the inorganic fine powder and aggregate, and, Ri Do from the polymer latex,
A road repair material in which the plasticizer is powdered aluminum sulfate. The road repair material according to claim 1, wherein the plasticizer is contained in an amount of 1 to 5 parts by mass with respect to a total of 100 parts by mass of the calcium aluminate and the gypsum. Cement, vitrification rate of 70% or more, CaO / Al ₂ O ₃ The molar ratio is 1.5 to 2.3, and the brain specific surface area is 3000 cm. ² It consists of a premix material containing calcium aluminate, gypsum, alkaline earth metal hydroxide, plasticizer, inorganic fine powder and aggregate of / g or more, and polymer latex.
A road repair material in which the plasticizer is a clay mineral and contains 1 to 15 parts by mass of the clay mineral with respect to a total of 100 parts by mass of the calcium aluminate and the gypsum. A claim comprising providing a partition in one bag, packing the premix material and the polymer latex separately, removing the partition and mixing immediately before use, and filling the repaired part of the road. A repair method using the road repair material according to any one of 1 to 3.