JP2008274580A - Filling material for pavement body, and paving method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filling material having a long usable time of about 60 minutes without degrading compressive strength at a young age (at an age on the order of 3 hours). <P>SOLUTION: The filling material for a pavement body contains sand having a particle size of 90 to 1,000 μm, of 5 to 30 mass% and reemulsifiable polymer powder of 1 to 10 mass% in a cement composition of 100 mass% which contains cement mineral of 100 to 1,000 mass% in an admixture of 100 mass%. The admixture contains a condensation adjuster in a predetermined proportion in a high-speed component in which calcium aluminate and an inorganic sulfate are mixed with each other at a predetermined mass ratio. The condensation adjuster is comprised of sodium aluminate, an inorganic carbonate, and carboxylic acids. The calcium aluminate has a vitrification ratio of 80% or more, and provided that any ingredient of the condensation adjustor is contained in an amount of 100 mass%, the other two ingredients are contained in an amount of 60 to 160 mass%. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention prepares an admixture by mixing a calcium aluminate and an inorganic sulfate rapid-hardening component with a setting modifier composed of sodium aluminate, an inorganic carbonate and a carboxylic acid. The present invention relates to an injection material for a pavement having a semi-flexibility obtained by mixing a cement composition containing a cement mineral and a method for paving using the injection material for a pavement.

Conventionally, a hardened cement containing 15 to 35% of a quick hardening component in which calcium aluminate and inorganic sulfate are mixed at a weight ratio of 1: (0.5 to 3) with respect to the cement mineral. Super fast-hardening cement composition containing sodium aluminate 0.2-5%, inorganic carbonate 0.2-5% and carboxylic acids 0.1-2% by weight based on the rapid-hardening cement as a main component (For example, refer to Patent Document 1).
In the super-hard cement composition thus configured, after pouring water into the cement composition, it is possible to maintain a setting time (pot life) of at least 20 minutes and a compressive strength after 1 hour is 19.6 N / mm ² or more. Further, the subsequent compressive strength is also steadily extended, excellent in long-term durability, and further, it does not cause a spotting phenomenon in the cured product.

Moreover, it is 0 with respect to the cement component which consists of Portland cement or the mixed cement containing Portland cement, 2-50 weight% of quick hardening components with respect to this cement component, and the total weight of a cement component and a quick hardening component. A temperature-buffered fast-curing composition containing 1 to 5% by weight of a setting modifier (for example, see Patent Document 2) is disclosed. In this temperature buffered fast-curing composition, the fast-hardening component is a mixture of 40 to 95% by weight of fine metallurgical metal slag mainly composed of calcium aluminate and 5 to 60% by weight of type II anhydrous gypsum, and alkali carbonate is internally contained. 1 to 10% by weight, and 1 to 10% by weight of one or more selected from the group consisting of sodium aluminate, potassium aluminate and aluminum sulfate is added. Further, the setting adjuster comprises an organic acid setting retarder and an alkali sulfate.
The temperature-buffered fast-curing composition thus configured can be easily prepared by adding and mixing predetermined amounts of cement component, fast-hardening component and setting modifier, and the amount of kneading water is 30 to 100% by weight. By kneading, a high-strength cured body can be obtained. As a result, the use of a temperature buffered fast-curing composition makes it possible to ensure stable and good setting characteristics and workability over a wide range of construction temperatures.

Furthermore, a cement composition containing calcium aluminate, polyacrylic acids, boric acids, carbonates and carboxylic acids (see, for example, Patent Document 3) is disclosed.
The cement composition thus configured is able to ensure long fluidity and pot life, has an appropriate hardness time, can sufficiently develop good strength, and is excellent in fire resistance and high temperature strength.

On the other hand, first, 20 to 100 parts by weight of a fast-curing hardener is mixed with 100 parts by weight of Portland cement or mixed cement to prepare a fast-curing cement material, and then set to 100 parts by weight of the fast-curing cement material. A grout material is prepared by blending 0.1 to 1.0 part by weight of a modifier and 1.5 to 8.0% by weight of the polymer for cement and 1.5 to 8.0% by weight of the polymer and fast-curing cement material. In addition, a kneaded material is prepared by kneading water into the grout material in a mass ratio of 40 to 70% by weight with respect to the fast-curing cement material. The kneaded material is further mixed in asphalt concrete having a porosity of 40 to 10%. Has disclosed a semi-rigid pavement method (see, for example, Patent Document 4). In this semi-rigid pavement method, the fast-curing hardener contains 50% by weight or more of a calcium aluminate compound.
In the semi-rigid pavement method configured as described above, Portland cement or mixed cement is composed of fine powder metallurgy containing 50% by weight or more of calcium aluminate mainly composed of 12CaO · 7Al ₂ O ₃ and type II anhydrous gypsum. Calcium aluminate hydrate is obtained by hydration reaction of calcium hydroxide and calcium aluminate in the cement at the initial stage of hydration by kneading the fast-curing cement obtained by blending the fast-curing hardener with water. In addition, the hydration reaction of this calcium aluminate hydrate with type II anhydrous gypsum produces acicular crystals of ettringite and monosulfate (3CaO.Al ₂ O ₃ .CaSO ₄ .12H ₂ O). The initial strength can be expressed. In addition, by changing the amount of setting modifier added, the curing start time can be adjusted freely, the pavement construction time can be shortened, and since it hardens rapidly after construction, it has excellent penetration power into the voids of asphalt concrete. It is most suitable for construction that requires. That is, it is possible to perform pavement in which the time and fluidity necessary for the concrete placing work are maintained and the strength increases in a short time.

Further, a pavement having a water retention function in which the porosity is 10 to 40% and the void portion is filled with a water retention injection material having a maximum water absorption rate of 30 to 80% by mass is disclosed (for example, a patent). Reference 5).
In the pavement having the water retention function configured as described above, the effect of suppressing the temperature increase of the pavement surface is maintained for a long time, and the pavement surface has a compressive strength with no practical problem.

Furthermore, when the cementitious binder and the water-retaining material are included and the water-retaining material is 100% by mass, the water-retaining material contains 30-100% by mass of a diatomaceous filter aid having a particle size of 0.1-50 μm. An injection material for pavement is disclosed (for example, see Patent Document 6). In this injecting material for pavement, super fast cement, ordinary Portland cement, early strength Portland cement, white cement or the like is used as a cement-based binder. The super fast-hardening cement is a cement obtained by mixing 5 to 100% by weight of a fast-hardening component consisting of calcium aluminate and anhydrous gypsum with respect to 100% by weight of Portland cement. MG-5 (manufactured by Mitsubishi Materials Corporation) Etc. In addition, examples of the quick-hardening component composed of calcium aluminate and anhydrous gypsum include Coca Ace (manufactured by Mitsubishi Materials Corporation), Cosmic (Electrochemical Industry Co., Ltd.), and the like, and these are used by appropriately mixing with Portland cement.
In the injecting material for pavement constructed in this way, even when it is not in the state of being replenished with water due to rain or watering, when it receives heat from solar radiation, its surface temperature begins to rise, Moisture in the atmosphere adsorbed by the filter aid evaporates and takes heat away, and a significant rise in the surface temperature of the pavement can be suppressed. It can be suppressed for a relatively long time.
Japanese Examined Patent Publication No. 3-41420 (Claim 1, description, page 2, right column, line 28 to page 33, right column, line 33) Japanese Patent No. 3125316 (Claim 1, paragraph number [0028], paragraph number [0039]) JP-A-6-32642 (Claim 1, paragraph number [0066]) JP-A-2-145469 (Claims 1 and 2, specification, page 3, upper right column, line 9 to same page, lower left column, second line, specification, page 7, lower right column, line 7 to same page) (Column 14th line) JP 2005-48403 A (Claim 1, paragraph number [0051]) JP 2007-46337 A (Claim 1, paragraph number [0013, paragraph number [0014]])

However, with the super-hard cement shown in the above-mentioned conventional patent document 1, it is possible to ensure a long pot life of about 60 minutes without reducing the compressive strength at a young age (about 3 hours). It was difficult, and spots were observed on the cured body, and there was a problem that this part became a defect and the long-term strength was lowered. Here, the age is the time measured immediately after kneading the mixture obtained by adding water to the cement composition, and the compressive strength at the young age (about 3 hours of age) is the water in the cement composition. The compressive strength of the cured product when 3 hours have passed immediately after the kneaded mixture is added. The pot life means the time from immediately after kneading the mixture obtained by adding water to the cement composition until the mixture loses fluidity.
Moreover, in the conventional super-hard cement shown in the above-mentioned conventional patent document 1, there is a large temperature dependency of the setting time that the setting time changes if the kneading temperature after water injection is different. There was a problem that the temperature dependency of
Moreover, in the super-hard cement shown in the above-mentioned conventional patent document 1, if the addition amount of the setting modifier is increased in order to increase the pot life, the compressive strength at a young material age (material age of about 3 hours). There was also a problem of lowering.
Further, in the temperature buffered fast-curing composition shown in the above-mentioned conventional Patent Document 2, since calcium aluminate is a powder metallurgy, the compressive strength of the cured body is lowered, and the temperature dependence of the setting time is still large. There was a problem.
Further, the conventional cement composition disclosed in Patent Document 3 does not use inorganic carbonate such as anhydrous gypsum, and thus has a problem of low compressive strength at a young age (about 3 hours). .

Moreover, in the semi-rigid pavement method shown in the above-mentioned conventional patent document 4, since a fine powder metallurgy is used as a calcium aluminate source, the temperature change of the setting time becomes large, especially at a low temperature of 5 to 10 ° C. Thus, there is a problem that the strength of the young age (about 3 hours of age) is lowered when a setting regulator is added to increase the setting time.
Moreover, in the paving body having the water retention function shown in the above-mentioned conventional Patent Document 5, there is a problem that the sustainability is short as 3 to 4 days after receiving water supply by rain or watering in summer.
Furthermore, in the injection material for pavement shown in the above-mentioned conventional patent document 6, since a caulk ace or cosmic is used as a fast-hardening material, when the pot life is as long as 30 to 75 minutes, the compressive strength is high. There was a problem that it decreased.

The object of the present invention is to ensure a long pot life of about 60 minutes without lowering the compressive strength at a young age (about 3 hours of age). An object of the present invention is to provide an injecting material for a pavement and a pavement method using the same, which can hardly change the temperature dependency of the setting time.
Another object of the present invention is to provide an injecting material for a paving body and a paving method using the same, which can suppress the temperature rise of the surface of the paving body for a relatively long time.

  The invention according to claim 1 is 5 to 30% by mass of sand having a particle size of 90 to 1000 μm with respect to 100% by mass of cement composition containing 100 to 1000% by mass of cement mineral with respect to 100% by mass of the admixture, An injection material for pavement containing 1 to 10% by mass of a re-emulsified powder resin, wherein the admixture is a mixture of calcium aluminate and inorganic sulfate in a mass ratio of 1: (0.5 to 3). Concentration of 0.2 to 35.0 mass% sodium aluminate, 0.2 to 35.0 mass% inorganic carbonate and 0.1 to 15.0 mass% carboxylic acid When containing a regulator and the vitrification rate of calcium aluminate is 80% or more, and any one of the setting regulators consisting of sodium aluminate, inorganic carbonate and carboxylic acid is 100% by mass The other two 60 to 160% by mass of each, and at least one setting modifier of sodium aluminate, inorganic carbonate or carboxylic acid, the total amount of the selected one type of setting regulator is 100% by mass. When the average particle diameter exceeds 45 μm and is 90 μm or less, the first particles are 10 to 45 mass%, the average particle diameter is more than 90 μm and the second particles are 150 μm or less, 30 to 70 mass%, the average particle diameter is more than 150 μm, and 500 μm. The pavement injection material is characterized by containing 5 to 30% by mass of the following third particles and containing more second particles than first particles and more than third particles.

In the pavement injecting material described in claim 1, since the vitrification rate of calcium aluminate is 80% or more, the cement composition containing the admixture is mixed with sand and a re-emulsified powder resin. A body injection material is prepared, and cement milk is prepared by adding water to the pavement injection material, and when the cement milk is further cured, the young material age of the cured body (about 3 hours of material age) ), The pot life can be as long as about 60 minutes, and spots can be prevented from occurring on the cured body, and water can be added to the pavement injection material. Even if the kneading temperature of the cement milk obtained in this way is different, the setting time hardly changes, and the temperature dependency of the setting time can be reduced.
Also, the mixing ratio of sodium aluminate, inorganic carbonate and carboxylic acid is in the above range, and the mixing ratio of the first to third particles of at least one setting modifier among sodium aluminate, inorganic carbonate or carboxylic acid is In each of the above ranges, sand and a re-emulsified powder resin are mixed in a cement composition comprising a setting modifier containing more second particles than first particles and more than third particles, a cement mineral, and a rapid hardening component. In the cement milk mixed with water added to the pavement injection material obtained in this way, the reaction starts quickly and the hydration reaction continues smoothly, that is, the rapid reaction is suppressed and continuously. By allowing a mild hydration reaction to occur, beneficial ettringite [3CaO.Al ₂ O ₃ .3CaSO ₄ .32H ₂ O] or monosulfate [3 (3CaO. Al ₂ O ₃ · CaSO ₄ · 12H ₂ O)] or both are rapidly formed. As a result, when the cement milk obtained by pouring water into the pavement injection material is hardened, the hardened body can be reliably produced without reducing the compressive strength at the young age (about 3 hours). The pot life can be secured as long as about 60 minutes, and the temperature dependency of the setting time can be further reduced.
Moreover, when cement milk is prepared by mixing 35 to 55% by mass of water with respect to 100% by mass of the pavement injection material, the pot life of the cement milk is 30 to 75 minutes, and the age of the material The compressive strength for 3 hours is preferably 4.5 N / mm ² or more.

The invention according to claim 3 is a step of preparing cement milk by mixing water with the pavement injecting material according to claim 1 or 2, and a void of the pavement having a porosity of 40 to 10%. A pavement method using an injection material for a pavement including a step of filling a part.
In the pavement method using the pavement body injecting material according to claim 3, when the cement milk filled in the void portion of the pavement is hardened, the young material age of the hardened body (material age of about 3 hours) The pot life can be ensured for as long as about 60 minutes without lowering the compression strength at the same time, and the temperature dependence of the setting time can be reduced.

  The invention according to claim 4 is an injecting material for pavement comprising 5 to 80% by mass of a water retaining material with respect to 100% by mass of a cement composition containing 100 to 1000% by mass of cement mineral with respect to 100% by mass of an admixture. The water retention material is composed of one or more selected from the group consisting of diatomaceous filter aid, paper sludge incinerated ash, and natural uncalcined vermiculite, and the admixture is calcium aluminate and inorganic sulfuric acid. Sodium aluminate 0.2 to 35.0 mass%, inorganic carbonate 0.2 to 0.2% by weight with respect to the rapid hardening component in which salt is mixed at a mass ratio of 1: (0.5 to 3) A setting adjuster comprising 35.0% by mass and 0.1 to 15.0% by mass of a carboxylic acid, and a vitrification rate of calcium aluminate is 80% or more, wherein sodium aluminate, inorganic carbonate and carvone When any one of the coagulation regulators made of a cadmium is 100% by mass, the other two types are each included in an amount of 60 to 160% by mass, and at least one of sodium aluminate, inorganic carbonate or carboxylic acids When the total amount of the selected one type of setting modifier is 100% by mass, 10 to 45% by mass of the first particles having an average particle size of more than 45 μm and 90 μm or less, and an average particle size of 90 μm The second particles 30 to 70% by mass exceeding 150 μm or less, the third particles 5 to 30% by mass exceeding 150 μm in average particle size and 500 μm or less, and the second particles more than the first particles are included. It is an injection material for pavements characterized by containing more than 3 particles.

In the injecting material for paving bodies described in claim 4, when cement milk prepared by mixing water with the injecting material for paving bodies is hardened, The pot life can be secured as long as about 60 minutes without lowering the compressive strength at a young age (about 3 hours), and it is possible to prevent the occurrence of spots on the cured product. Even if the mixing temperature of cement milk obtained by adding water to the pavement injection material is different, the setting time hardly changes and the temperature dependence of the setting time can be reduced. Can be suppressed for a relatively long time. The water-retaining material adsorbs water vapor in the atmosphere and retains its moisture.
In addition, when cement milk is prepared by mixing 80 to 150% by weight of water with respect to 100% by weight of the injection material for pavement, the pot life is 30 to 75 minutes and the compressive strength is 3 hours. Is 0.5 N / mm ² or more, and the water absorption after curing is preferably 50 to 90% by mass.
In addition, when cement milk is prepared by mixing 65 to 80% by mass of water with respect to 100% by mass of the injection material for pavement, the pot life is 30 to 75 minutes and the compressive strength is 3 hours. Is 4.0 N / mm ² or more, and the water absorption after curing may be 35 to 50% by mass.
Furthermore, it is preferable that the moisture absorption rate of the cured product when the cement milk prepared by mixing water with the pavement injection material is cured is 5 to 15% by mass.

The invention according to claim 8 is a step of preparing cement milk by mixing water with the pavement injecting material according to any one of claims 4 to 7, and the cement milk having a porosity of 40 to 10%. A pavement method using an injection material for a pavement including a step of filling a void portion of the pavement.
In the pavement method using the pavement body injecting material according to claim 8, when the cement milk filled in the void portion of the pavement is hardened, the young material age of the hardened body (about 3 hours of material age). The pot life can be ensured for as long as about 60 minutes without lowering the compression strength at the same time, and the temperature dependence of the setting time can be reduced. Can be suppressed for a relatively long time. On the other hand, when this cement milk is filled in the gap portion of the pavement, water vapor in the atmosphere is adsorbed even in a state where it is not replenished with water due to rainfall or watering. In addition, when the surface temperature starts to rise when receiving heat from solar radiation, the water vapor in the atmosphere adsorbed by the water retention material evaporates and takes away heat, suppressing the surface temperature of the pavement from rising significantly. To do.

According to the present invention, there is provided an injecting material for pavement in which a cement composition containing cement mineral and an admixture is mixed with sand and a re-emulsified powder resin, wherein the admixture is a mixture of calcium aluminate and inorganic sulfate. The rapid hardening component contains a setting adjuster composed of sodium aluminate, inorganic carbonate and carboxylic acids, and the vitrification rate of the calcium aluminate is 80% or more, and sodium aluminate, inorganic carbonate and carboxylic acids The mixing ratio is set to a predetermined range, the mixing ratio of the first to third particles of at least one setting modifier among sodium aluminate, inorganic carbonate or carboxylic acid is set to a predetermined range, and Since it was set to contain 2 particles more than the 1st particle and more than the 3rd particle, water was added to this pavement material and mixed to prepare cement milk In this case where the cement milk is hardened, without reducing the compressive strength at the young ages of the cured product (age of about 3 hours), the pot life can be secured as long as about 60 minutes. Further, since no spots are generated on the cured body, it is possible to prevent the occurrence of a situation in which this spot portion becomes a defect and causes a long-term decrease in the strength of the cured body. Even if the kneading temperature after water injection is different, the setting time hardly changes, and the temperature dependence of the setting time can be reduced. As a result, in any working environment, the viscosity change of cement milk obtained by pouring water into the pavement injection material containing the admixture is kneaded, placed or applied, etc. under substantially the same conditions. It can be performed. Moreover, when water is poured into the pavement injection material containing the admixture, ettringite [3CaO · Al ₂ O ₃ · 3CaSO ₄ · 32H ₂ O] or monosulfate [3 (3CaO · Al ₂ O ₃ · CaSO ₄ · 12H ₂ O) ] Or both of these are produced, and the ettringite and monosulfate can absorb hexavalent chromium. As a result, it is possible to prevent diffusion of hexavalent chromium, which is listed as a harmful substance that pollutes the environment, into the ground.

Moreover, since it contains 5 to 30% by mass of sand having a particle size of 90 to 1000 μm with respect to 100% by mass of the cement composition containing the admixture, when kneading cement milk prepared by mixing water with the pavement injection material In addition, each material is well agitated due to the presence of the sand, the setting modifier dissolves quickly, and the setting property can be stabilized, and the surface state of the cured product obtained by curing the cement milk is Become tough.
Moreover, since 1-10 mass% of re-emulsified powder resin is contained with respect to 100 mass% of cement composition containing an admixture, the material separation of the cement milk prepared by mixing water with the injection material for pavements becomes difficult to occur. As a result, bleeding is reduced and cracks are less likely to occur in the cured product obtained by hardening the cement milk.
Further, after preparing cement milk by mixing water into the pavement injection material containing the sand and the re-emulsified powder resin, if the cement milk is filled in the void portion of the pavement, the cement milk is cured. In addition, it is possible to ensure a long pot life of about 60 minutes without lowering the compressive strength of the hardened body at a young age (about 3 hours), and the temperature dependence of the setting time. Can be small.

On the other hand, a pavement injection material in which a cement composition containing a cement mineral and an admixture is mixed with a water retention material, the water retention material comprising diatomaceous filter aid, paper sludge incineration ash, and natural uncalcined vermiculite. Condensation adjustment consisting of one or two or more selected from the group consisting of a rapid hardening component in which calcium aluminate and inorganic sulfate are mixed, sodium aluminate, inorganic carbonate and carboxylic acids The calcium aluminate has a vitrification rate of 80% or more, the mixing ratio of sodium aluminate, inorganic carbonate and carboxylic acid is set within a predetermined range, and sodium aluminate, inorganic carbonate or carboxylic acid The mixing ratio of the first to third particles of at least one of the set modifiers is set within a predetermined range, and further contains more second particles than the first particles. If both are set to contain more than the third particles, as in the above, water is added to the pavement injecting material and mixed to prepare cement milk. When this cement milk is cured, The pot life can be secured as long as about 60 minutes without lowering the compressive strength at the age of material (material age of about 3 hours). Also, as above, no spots occur on the cured body, so that it is possible to prevent the occurrence of a situation in which the spots become defects and cause a long-term decrease in the strength of the cured body, and the kneading temperature after pouring is different However, the setting time hardly changes and the temperature dependency of the setting time can be reduced. As a result, in any working environment, the viscosity change of cement milk obtained by pouring water into the pavement injection material containing the admixture is kneaded, placed or applied, etc. under substantially the same conditions. It is possible to prevent the diffusion of hexavalent chromium, which is listed as a harmful substance that pollutes the environment, into the ground.
Further, the pavement injecting material includes a water retention material that is excellent in moisture absorption and desorption, so that the water retention material adsorbs water vapor in the atmosphere and retains moisture. For this reason, if pavement infusion material containing a water-retaining material is mixed with water to prepare cement milk, and this cement milk is filled in the voids of the pavement, it will be replenished with water by rain or watering. Even if it receives heat from solar radiation in the absence of heat, when the surface temperature starts to rise, the moisture in the atmosphere adsorbed by the water-retaining material evaporates and takes heat away, and the surface temperature of the pavement A significant increase can be suppressed, and even if a state where water is not replenished continues for a long time, a temperature increase on the surface of the pavement can be suppressed for a relatively long time.

Next, the best mode for carrying out the present invention will be described.
<First Embodiment>
The pavement injecting material is 5 to 30% by mass, preferably 10 to 100% by mass of cement composition containing 100 to 1000% by mass, preferably 200 to 500% by mass of cement mineral with respect to 100% by mass of the admixture. -20 mass% sand and 1-10 mass%, preferably 2-5 mass% re-emulsified powder resin. The particle size of the sand is preferably 90 to 1000 μm, and more preferably 90 to 200 μm. Examples of cement minerals include ordinary Portland cement, early-strength Portland cement, medium heat Portland cement, low heat generation cement, blast furnace cement, silica cement, fly ash cement, and silica fume cement. Here, the mixing ratio of the admixture with respect to the total amount of the cement mineral and the admixture is limited to the range of 10 to 40 mass%, and if it is less than 10 mass%, the strength development of the early age (young material age) decreases. On the other hand, if it exceeds 40% by mass, the production cost increases and the cement mineral decreases, resulting in a decrease in long-term strength.

The admixture is a sodium aluminate 0.2-35.% By weight with respect to the rapid hardening component in which calcium aluminate and inorganic sulfate are mixed at a mass ratio of 1: (0.5-3). 0% by mass, preferably 0.4-5.0% by mass, inorganic carbonate 0.2-35.0% by mass, preferably 0.4-5.0% by mass, and carboxylic acids 0.1-15 0.0% by weight, preferably 0.2 to 2.0% by weight of a setting regulator. As a composition of calcium aluminate, 12CaO · 7Al ₂ O ₃ , 11CaO · 7Al ₂ O ₃ · CaX ₂ (X is a halogen element), 3CaO · Al ₂ O ₃ , CaO · Al ₂ O _{3 and the} like can be mentioned. It is done. Examples of the inorganic sulfate include anhydrous gypsum (composition: CaSO ₄ ), sodium sulfate and the like. Furthermore, examples of the inorganic carbonate include potassium carbonate, sodium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate and the like, and examples of the carboxylic acids include citric acid, tartaric acid, gluconic acid or malic acid, or sodium, potassium of these acids, Water-soluble salts such as calcium are listed.

  Here, the reason why the mixing ratio of calcium aluminate and inorganic sulfate is limited to the range of 1: (0.5-3) is that the usable time (working time) of cement milk is shortened outside this range. Alternatively, the compressive strength at a young material age (approximately 3 hours of material age) of the cured body is lowered. The mixing ratio of sodium aluminate with respect to the rapid hardening component was limited to the range of 0.2 to 35.0% by mass because the cured product did not reach the predetermined compressive strength at less than 0.2% by mass. This is because, if the content exceeds 0.0 mass%, it is impossible to secure a relatively long time of about 60 minutes, specifically 30 to 75 minutes, even if a setting modifier is used. Moreover, the mixing ratio with respect to the rapid hardening component of the inorganic carbonate is limited to the range of 0.2 to 35.0% by mass, and the mixing ratio of the carboxylic acids with respect to the rapid hardening component is 0.1 to 15.0 with the internal ratio. The reason why it is limited to the range of mass% is that if it is outside these ranges, the working time required for construction (use time of cement milk) cannot be secured, or the compressive strength of the cured product is lowered.

The cement milk is prepared by mixing 35 to 55% by mass, preferably 40 to 50% by mass of water with respect to 100% by mass of the pavement injecting material. Cement milk is hardened. When the pot life of this cement milk is 30 to 75 minutes, preferably 40 to 60 minutes, the compressive strength of the cured product at the age of 3 hours is 4.5 N / mm ² or more, preferably 5.5 to 10. It is preferably 0 N / mm ² . Here, the mixing ratio of water to 100% by mass of the pavement injecting material is limited to the range of 35 to 55% by mass. If the amount is less than 35% by mass, the fluidity is deteriorated and the strength of the cured body is increased. If it exceeds 55% by mass, material separation occurs and the strength of the cured product varies more. Further, 100 to 1000% by mass, preferably 200 to 500% by mass of cement is mixed with 100% by mass of the admixture in the pavement injection material. Here, the cement mixing ratio with respect to 100% by mass of the admixture is limited to the range of 100 to 1000% by mass. If it is less than 100% by mass, it is not economical and adjustment of the setting time may be difficult. This is because the working time is shortened, and when it exceeds 1000% by mass, the compressive strength of the young material age decreases. The reason why the compressive strength at 3 hours of age of the hardened body is limited to 4.5 N / mm ² or more is that if it is less than 4.5 N / mm ² , the strength required for running the vehicle is insufficient and the road cannot be opened. . The mixing ratio of sand with respect to 100% by mass of the cement composition is limited to the range of 5 to 30% by mass. When the content is less than 5% by mass, the stirring performance and the wear resistance are lowered and the slip resistance is also reduced. This is because if it exceeds mass%, the compressive strength of the young age will decrease and material separation will occur, leading to increased bleeding. Moreover, the particle size of the sand was limited to the range of 90 to 1000 μm. If the particle size is less than 90 μm, the stirring performance and wear resistance are lowered and the slip resistance is also lowered, and if it exceeds 1000 μm, the sand settles in cement milk. This is because it is easy to do, and the pouring property of cement milk into the pavement decreases. Furthermore, the mixing ratio of the re-emulsified powder resin with respect to 100% by mass of the cement composition is limited to the range of 1 to 10% by mass. If it is less than 1% by mass, the effect of preventing material separation and the effect of preventing cracking are sufficiently exhibited. This is because if it exceeds 10% by mass, the cost becomes uneconomical. This re-emulsified powder resin is also called a powder emulsion, and is obtained by spray-drying a synthetic resin emulsion. The type of this re-emulsified powder resin is not particularly limited, but examples include ethylene vinyl acetate (EVA), vinyl acetate (VAVeoVa), styrene acrylate (SAE), and polyacrylate (PAE). From the viewpoint, it is preferable to use an acrylic resin such as styrene acrylate (SAE) or polyacrylate (PAE).

  On the other hand, the vitrification rate (non-crystallization rate) of calcium aluminate in the admixture is 80% or more, preferably 80 to 98%, more preferably 90 to 95%. Here, the reason why the vitrification rate of calcium aluminate is limited to 80% or more is that when it is less than 80%, the strength developability when the pot life is increased is lowered. Further, if the vitrification rate of calcium aluminate exceeds 98%, it is not preferable because the yield is lowered and the manufacturing cost is increased. The vitrification rate (%) of the calcium aluminate was calculated by analyzing the sample by a powder X-ray diffraction method and comparing the height of the main peak.

  Further, when any one of the setting regulators consisting of sodium aluminate, inorganic carbonate and carboxylic acids is taken as 100% by mass, the other two types are contained in an amount of 60-160% by mass, preferably 66-150% by mass, respectively. . For example, sodium aluminate is selected as any one of sodium aluminate, inorganic carbonate, or carboxylic acid, and contains 0.4% by mass of sodium aluminate based on the total amount of the admixture, and the inorganic carbonate is admixture. In the case where each containing 0.6% by mass with respect to the total amount of carboxylic acids and 0.4% by mass with respect to the total amount of the admixture, inorganic carbonates and carboxylic acids are used based on sodium aluminate (100% by mass). Each of them contains 150% by mass and 100% by mass, and falls within the set range. When the total amount of the selected one type of setting modifier of sodium aluminate, inorganic carbonate or carboxylic acid is 100% by mass, the average particle size exceeds 45 μm and 10 to 45% by mass of first particles of 90 μm or less, preferably 15 to 40% by mass, and 30 to 70% by mass of second particles having an average particle size of more than 90 μm and 150 μm or less, preferably 35 to 65% by mass, 3-30 mass% of 3rd particle | grains exceeding a particle size of 150 micrometers and 500 micrometers or less, Preferably it contains 10-25 mass%. The average particle size of the first to third particles may be limited to the above range may be any one of sodium aluminate, inorganic carbonate or carboxylic acids, and may be sodium aluminate, inorganic carbonate and carboxylic acids. Two kinds selected from the group consisting of sodium aluminate, inorganic carbonates and carboxylic acids may be used. When the selected one type of setting modifier is composed of only the first to third particles, the total of the first to third particles is 100% by mass, and the selected one type of setting modifier is When the fine particles having an average particle size of less than 45 μm are included in addition to the first to third particles, the total of the first to third particles is less than 100% by mass. Furthermore, it contains more second particles than first particles and more than third particles. The third particles are preferably contained in the same amount as the first particles or more than the first particles.

Here, when any one of the setting regulators consisting of sodium aluminate, inorganic carbonate and carboxylic acid is 100% by mass, the other two are limited to the range of 60 to 160 masses, respectively. Because the mixing ratio of sodium aluminate, inorganic carbonate and carboxylic acids to the total amount of the admixture is relatively wide, the total amount of the other type of setting modifier is far greater than the total amount of the one type of setting modifier selected above. When the mixing ratio of the third particles of the other types of setting modifiers is much larger than the above setting range, the influence of the other types of setting modifiers becomes large, and the young age of the cured product (material) This is because the pot life of the cement paste cannot be secured as long as about 60 minutes, specifically 30 to 75 minutes, without reducing the compressive strength at about 3 hours). Moreover, the reason why the mixing ratio of the first particles is limited to the range of 10 to 45 mass% is based on the following reason. If the mixing ratio of the first particles is less than 10% by mass, when water is poured into the cement composition containing the admixture, the amount of chemicals (selected coagulation modifier) that dissolves in the early stage of the reaction decreases, and the reaction start may be delayed. or because the delayed action of coagulation resulting in progressive condensation faster smaller, ettringite _{[3CaO · Al 2 O 3 ·} 3CaSO 4 · 32H 2 O] and monosulfate _{[3 (3CaO · Al 2 O} 3 · CaSO 4 This is because it is considered that the production of hydrates such as [12H ₂ O)] is adversely affected, and the expression of the strength of the young material (material age of about 3 hours) is deteriorated. When the mixing ratio of the first particles exceeds 45% by mass, when water is poured into the cement composition containing the admixture, a large amount of the drug (selected coagulation modifier) is dissolved at the initial stage of the reaction, and the initial reaction proceeds rapidly. Or, since the setting delaying action increases and the setting progresses slowly, it adversely affects the formation of hydrates such as ettringite, and the expression of the young age strength (age age of about 3 hours) is poor. Because it is considered to be.

  The reason why the mixing ratio of the second particles is limited to the range of 30 to 70% by mass is as follows. When the mixing ratio of the second particles is less than 30% by mass, when water is added to the cement composition containing the admixture, the amount of chemicals (selected coagulation modifier) that dissolves in the middle of the reaction decreases, and the hydration reaction is smooth. This is because it is considered that the generation of hydrates such as ettringite is adversely affected and the expression of the young age strength (material age of about 3 hours) is deteriorated. When the mixing ratio of the second particles exceeds 70% by mass, when water is poured into the cement composition containing the admixture, more chemicals (selected coagulation modifiers) dissolve in the middle of the reaction, and the reaction from the initial to the middle This is because it is considered that the development of hydrates such as ettringite is adversely affected and the expression of the young age strength (about 3 hours of age) is deteriorated. The reason why the mixing ratio of the third particles is limited to the range of 5 to 30% by mass is as follows. When the mixing ratio of the third particles is less than 5% by mass, when water is poured into the cement composition containing the admixture, the amount of chemicals (selected coagulation modifiers) that dissolve in the late stage of the reaction decreases, and the hydration reaction is smooth. This is because it is considered that the generation of hydrates such as ettringite is adversely affected and the expression of the young age strength (material age of about 3 hours) is deteriorated. When the mixing ratio of the third particles exceeds 30% by mass, when water is poured into the cement composition containing the admixture, more chemicals (selected coagulation modifiers) dissolve in the late reaction, and the reaction from the middle to the latter This is because it is considered that the development of hydrates such as ettringite is adversely affected and the expression of the young age strength (about 3 hours of age) is deteriorated. In addition, the reason why the second particles are included more than the first particles and more than the third particles is that when the water is poured into the cement composition containing the admixture, the second particles contributing to the middle stage of the reaction are made relatively large. This is to suppress a rapid reaction, continuously cause a gentle hydration reaction, and generate a hydrate with a good expression of the strength of the young material (a material age of about 3 hours). In addition to the above, a water reducing agent, an antifoaming agent, a thickening agent, a separation reducing agent and the like may be added as an admixture. In particular, by adding 0.01 to 0.5% by mass of the antifoaming agent with respect to 100% by mass of the cement composition, it is possible to eliminate the foam generated during the kneading of the cement milk and to increase the strength of the cured body. effective.

In the pavement injection material thus configured, the vitrification rate of calcium aluminate is 80% or more, the mixing ratio of sodium aluminate, inorganic carbonate and carboxylic acid is set within a predetermined range, and sodium aluminate The mixing ratio of the first to third particles of at least one setting regulator of inorganic carbonates or carboxylic acids is set within a predetermined range, and the second particles are contained more than the first particles and the third particles Since it was set so as to contain more, when water was added to this pavement injection material and mixed, the reaction start started quickly, and the hydration reaction continued smoothly, that is, the rapid reaction was suppressed and the continuous reaction was continued. By allowing a mild hydration reaction to occur, either or both of the beneficial ettringite and monosulfate are rapidly formed. As a result, the pot life can be secured as long as about 60 minutes without reducing the compressive strength at the young age of the cured body (approx. 3 hours of age) of the cured body poured into the pavement injection material and cured. Can do. Further, since no spots are generated on the cured body, it is possible to prevent the occurrence of a situation in which this spot portion becomes a defect and causes a long-term decrease in the strength of the cured body. Further, even if the kneading temperature after water injection is different, the setting time hardly changes, and the temperature dependency of the setting time can be reduced. Therefore, in any work environment, kneading work, placing work or coating work can be performed under substantially the same conditions of viscosity change of the kneaded material obtained by adding water to the cement composition containing the admixture. it can.
In addition, either or both of ettringite and monosulfate produced by pouring water into the pavement injection material containing the admixture can absorb hexavalent chromium. As a result, it is possible to prevent diffusion of hexavalent chromium, which is listed as a harmful substance that pollutes the environment, into the ground.

<Second Embodiment>
The injection material for pavement of this embodiment is 5 to 80 with respect to 100% by mass of cement composition containing 100 to 1000% by mass, preferably 200 to 500% by mass of cement mineral with respect to 100% by mass of the admixture. It contains 10% to 50% by weight, preferably 10 to 50% by weight of a water-retaining material. The said admixture and cement mineral are comprised the same as the admixture and cement mineral of 1st Embodiment. The water-retaining material includes one or more selected from the group consisting of diatomaceous filter aid, paper sludge incinerated ash, and natural unfired vermiculite, but does not include diatomaceous earth. Here, the mixing ratio of the water-retaining material with respect to 100% by mass of the cement composition is limited to the range of 5 to 80% by mass. If the amount is less than 5% by mass, a sufficient water-retaining effect cannot be obtained. This is because not only a further water retention effect cannot be obtained, but also the compressive strength is lowered and a desired pavement cannot be obtained. And in order to obtain a hardened | cured material of a normal strength type or a high water retention type, 80-150 mass% of water is mixed with respect to 100 mass% of the injection material for pavements, Preferably 90-120 mass% is mixed, and cement milk is mixed. Prepare. At this time, the pot life of the cement milk is 30 to 75 minutes, preferably 40 to 60 minutes, the compressive strength at the age of 3 hours is 0.5 N / mm ² or more, and the water absorption after curing is 50. It is -90 mass%. In addition, the normal strength type cured body having a compressive strength at a material age of 3 hours of 1.0 N / mm ² or more and less than 4.0 N / mm ² has a water absorption rate of 55 to 65% by mass after curing. Although not high, a highly water-retained cured body having a water absorption rate of 75 to 85% by mass after curing has a compressive strength at a material age of 3 hours of 0.5 N / mm ² or more and less than 1.0 N / mm ^2. not high. In addition, the mixing ratio of water to 100% by mass of the pavement injection material for obtaining a normal strength type or high water retention type cured product is limited to the range of 80 to 150% by mass. This is because the water absorption is reduced, and if it exceeds 150% by mass, the compressive strength is lowered.

On the other hand, in order to obtain a high-strength cured body, cement milk is prepared by mixing 65 to 80% by mass of water with respect to 100% by mass of the pavement injection material. At this time, the pot life of the cement milk is 30 to 75 minutes, preferably 40 to 60 minutes, and the compressive strength at the age of 3 hours is 4.0 N / mm ² or more, preferably 4.5 to 7.0 N / Although it is as high as mm ² , the water absorption after curing is as low as 35 to 50% by mass. Here, the water mixing ratio with respect to 100% by mass of the pavement injection material for obtaining a high-strength cured product was limited to the range of 65 to 80% by mass. This is because the compressive strength is reduced when the content of S is smaller than 80% by mass.

On the other hand, when a diatomaceous filter aid having a particle size of 0.1 to 50 μm, preferably 1 to 30 μm is included as a water retention material, the diatomaceous filter aid is a powdered material made from diatomaceous earth. Thus, it has a moisture absorption function for adsorbing water vapor in the atmosphere. Specifically, the diatomaceous filter aid is obtained by pulverizing natural diatomaceous earth and firing at 800 ° C. to 1200 ° C., or by adding a small amount of soda ash to pulverized natural diatomaceous earth. That is, the diatomaceous filter aid used for this water retention material is not a naturally occurring natural product but an artificially created artificial product. Here, the particle size of the diatomaceous filter aid was limited to the range of 0.1 to 50 μm, and if it is less than 0.1 μm, the porous property of the diatomaceous filter aid is lost and the hygroscopic ability is lacking. If it exceeds 50 μm, it becomes difficult to fill the void portion of the pavement. As a water retention material, a diatomaceous filter aid having a particle size of 0.1 to 50 μm can be used. When the non-fired vermiculite is included as the water retention material, the non-fired vermiculite is preferably in the form of powder, the particle size is 20 to 400 μm, preferably 30 to 300 μm, and the maximum water absorption is 5% by mass or more. Natural unfired vermiculite is preferred. The more preferable maximum water absorption of this non-baked vermiculite is in the range of 10 to 30% by mass. Further, when paper sludge incineration ash is included as a water retention material, the paper sludge incineration ash has a particle size of 5 to 1000 μm, preferably 10 to 500 μm, and the main components are composed of SiO ₂ and Al ₂ O ₃ , Paper sludge incineration ash having a maximum water absorption of 30% by mass or more is preferable, and a more preferable maximum water absorption is in the range of 40 to 80% by mass.

  When the water-retaining material contains diatomaceous filter aid and non-calcined vermiculite and does not contain paper sludge incineration ash, when the water-retaining material is 100% by mass, the water-retaining material is 30 diatomaceous filter aid. It is preferable that ~ 80 mass%, natural non-baked vermiculite is contained in 20-70 mass%, diatomaceous filter aid is contained in 40-70 mass%, and natural non-baked vermiculite is more preferably contained in 30-60 mass%. When the water retention material contains diatomaceous filter aid and paper sludge incinerated ash and does not contain unfired vermiculite, when the water retention material is 100% by mass, the water retention material is diatomaceous filter aid. It is preferable that 30 to 80% by mass, 20 to 70% by mass of papermaking sludge incineration ash is included, 40 to 70% by mass of diatomaceous filter aid, and 30 to 60% by mass of papermaking sludge incineration ash are further preferable. . Further, when the water retention material contains diatomaceous filter aid, paper sludge incinerated ash, and non-fired vermiculite, when the water retention material is 100% by mass, the water retention material is 30 to 80 diatomaceous filter aid. It is preferable that 20 to 50% by mass of natural unfired vermiculite, 20 to 50% by mass of paper sludge incineration ash, 40 to 70% by mass of diatomaceous filter aid, and 25 to 45 of natural nonfired vermiculite. It is more preferable that 25% by mass to 45% by mass of papermaking sludge incineration ash is contained. With such a composition, water vapor absorbed by the diatomaceous filter aid can be retained for a relatively long period of time.

  A water-retaining pavement can be obtained by filling the gap portion of the pavement with cement milk obtained by kneading water into the pavement injection material described above. In the water-retaining cured body obtained by curing cement milk obtained by mixing 65 to 150 mass% of water with 100 mass% of the pavement injection material of the present invention and kneading, moisture absorption at an air temperature of 20 ° C. and a relative humidity of 80% is achieved. The rate is 5 to 15% by mass, and the maximum water absorption rate of the water-retaining cured body is 25 to 90% by mass. By setting the moisture absorption rate to 5 to 15% by mass, moisture in the atmosphere can be absorbed by the cured body, so that the effect of reducing the temperature of the pavement can be maintained even if it does not rain. Moreover, the porosity of the pavement is 10 to 40%, preferably 10 to 35%. As this pavement, a permeable concrete pavement, a permeable asphalt pavement, a permeable interlocking block, a permeable horizontal plate, a gravel, Pavement bodies such as ballast are listed. Here, the porosity of the pavement is limited to the range of 10 to 40%. If the amount is less than 10%, the amount of cement milk injected is not sufficient, and a sufficient water retention effect as a pavement cannot be obtained. This is because there is a problem that the suppression effect cannot be sufficiently exhibited, and when it exceeds 40%, the strength of the pavement is weakened and there is a possibility that the traveling vehicle may be obstructed.

  Cement milk filled in the void portion of such a pavement is obtained by adding 65 to 150% by mass of water to the above-described pavement injection material and kneading. That is, this cement milk contains 5 to 80% by mass of a water retaining material containing a diatomaceous filter aid and 65 to 150% by mass of water with respect to 100% by mass of the cement composition. Therefore, when the water retention material does not include any non-fired vermiculite and paper sludge incineration ash, when the water retention material is 100% by mass, the water retention material is a diatomaceous filter with a particle size of 0.1 to 50 μm. 100% by mass of auxiliary agent is included. When the water retention material contains diatomaceous filter aid and non-calcined vermiculite and does not contain paper sludge incineration ash, the water retention material has a particle size of 0.1 to 50 μm when the water retention material is 100% by mass. 30 to 80% by mass of diatomaceous filter aid and 20 to 70% by mass of natural non-baked vermiculite with a particle size of 20 to 400 μm, more preferably 40 to 70% by mass of diatomaceous filter aid. 30 to 60% by mass of natural unfired vermiculite.

In addition, when the water retention material contains a diatomaceous filter aid and paper sludge incinerated ash and does not contain unfired vermiculite, the water retention material has a particle size of 0.1 to 100% by mass with respect to 100% by mass of the water retention material. It is preferable that 30 to 80% by mass of a 50 μm diatomaceous filter aid and 20 to 70% by mass of paper sludge incineration ash having a particle size of 5 to 1000 μm and main components composed of SiO ₂ and Al ₂ O ₃ are contained. More preferably, it contains 40-70% by mass of a diatomaceous filter aid and 30-60% by mass of paper sludge incineration ash. Further, when the water retention material contains a diatomaceous filter aid, paper sludge incinerated ash, and non-calcined vermiculite, the water retention material is diatomaceous matter having a particle diameter of 0.1 to 50 μm with respect to 100% by mass of the water retention material. 30-80% by mass of filter aid, 20-50% by mass of natural unfired vermiculite having a particle size of 20-400 μm, a particle size of 5-1000 μm, and the main components are composed of SiO ₂ and Al ₂ O _3. It is preferable to contain 20 to 50% by mass of papermaking sludge incineration ash, more preferably 40 to 70% by mass of diatomaceous filter aid, 25 to 45% by mass of natural unfired vermiculite, and 25 to 25% of papermaking sludge incineration ash. Including 45% by mass.

  Cement milk having a maximum water absorption of 25 to 90% by mass by kneading 5 to 80% by mass of such a water retaining material, 100% by mass of an injecting material for pavement, and 65 to 150% by mass of water. Can be obtained. The reason why the amount of water is 65 to 150% by mass is that it is best to select in this range in consideration of the pouring property and workability of the water retaining material. And the pavement which has water retention is obtained by inject | pouring the cement milk which has such a maximum water absorption rate into the space | gap part of a pavement. And by injecting cement milk having such a maximum water absorption rate of 25 to 90% by mass into the void portion of the pavement, the effect of suppressing the temperature rise of the pavement surface is maintained for a long time, and the surface of the pavement Thus, an excellent effect is obtained in that a compressive strength having no practical problem can be obtained without causing any shaving or peeling. The admixture is configured in the same way as in the first embodiment.

Next, examples of the present invention will be described in detail together with comparative examples.
First, the types and abbreviations of materials used, that is, the types and abbreviations of calcium aluminate, inorganic sulfate, cement mineral, sodium aluminate, inorganic carbonate and carboxylic acids are shown in Table 1 below. In Table 1, “C12A7” is “12CaO · 7Al ₂ O ₃ ”, and “C11A7F” is “11CaO · 7Al ₂ O ₃ · CaF ₂ ”. The brane value is the total surface area of 1 g of calcium aluminate particles, and is measured by the brane air permeation specific surface area measurement method.

上記表１中のアルミン酸ナトリウム、無機炭酸塩及びカルボン酸類をそれぞれ所定の平均粒径の範囲毎に混合割合を変えた。その混合割合を表２に示す。なお、表２中の『0-45』は『０μｍを越えかつ４５μｍ以下』であり、『45-90』は『４５μｍを越えかつ９０μｍ以下』であり、『90-150』は『９０μｍを越えかつ１５０μｍ以下』であり、『150-500』は『１５０μｍを越えかつ５００μｍ以下』であることを意味する。

The mixing ratio of sodium aluminate, inorganic carbonate and carboxylic acid in Table 1 was changed for each predetermined average particle size range. The mixing ratio is shown in Table 2. In Table 2, “0-45” is “over 0 μm and under 45 μm”, “45-90” is “over 45 μm and under 90 μm”, and “90-150” is over “90 μm”. “150-500” means “over 150 μm and 500 μm or less”.

表２において、使用材料の略号『Al-1』、『Na-1』及び『Ci-1』で示す第１〜第３粒子の混合割合は全て本発明の範囲内、即ち請求項１及び４で設定した範囲内にあり、使用材料の略号『Al-2』、『Na-2』及び『Ci-2』で示す第１〜第３粒子のうち少なくとも１種の混合割合が本発明の範囲外、即ち請求項１及び４で設定した範囲外にある。
更に表１のカルシウムアルミネートのうち略号CA70、CA80及びCA90の化学組成毎の含有割合をガラス化率及びブレーン値とともに表３に示す。

In Table 2, the mixing ratios of the first to third particles indicated by the abbreviations “Al-1”, “Na-1” and “Ci-1” of the materials used are all within the scope of the present invention, that is, claims 1 and 4. The mixing ratio of at least one of the first to third particles indicated by the abbreviations “Al-2”, “Na-2” and “Ci-2” of the materials used is within the scope of the present invention. Outside, that is, outside the range set in claims 1 and 4.
Furthermore, the content ratio for each chemical composition of the abbreviations CA70, CA80 and CA90 in the calcium aluminate of Table 1 is shown in Table 3 together with the vitrification rate and the brain value.

＜実施例１＞
カルシウムアルミネートＣＡ９０を１０質量％と、フッ酸二型無水石膏Ｓ８を１０質量％と、普通ポルトランドセメントＮを８０質量％と、アルミン酸ソーダＡｌ−１を０．６質量％と、ソーダ灰Ｎａ−１を０．９質量％と、クエン酸Ｃｉ−１を０．６質量％と、砂Ｓａ−１を５．１質量％と、ポリマーを４．０８質量％と、水とを混合してセメントミルクを調製した。このセメントミルクを実施例１とした。なお、砂Ｓａ−１はセメント組成物（カルシウムアルミネートＣＡ９０、フッ酸二型無水石膏Ｓ８、普通ポルトランドセメントＮ、アルミン酸ソーダＡｌ−１、ソーダ灰Ｎａ−１及びクエン酸Ｃｉ−１）１００質量％に対して５．０質量％であり、ポリマーはセメント組成物１００質量％に対して４．００質量％であった。また水はこの水以外の材料の混合物（舗装体用注入材）１００質量％に対して４５質量％混合した。
＜実施例２＞
砂Ｓａ−１を１５．３質量％混合したこと以外は、実施例１と同様にしてセメントミルクを調製した。このセメントミルクを実施例２とした。なお、砂Ｓａ−１はセメント組成物１００質量％に対して１５．０質量％であった。
＜実施例３＞
砂Ｓａ−１を１５．３質量％と、消泡剤を０．０１質量％混合したこと以外は、実施例１と同様にしてセメントミルクを調製した。このセメントミルクを実施例３とした。なお、砂Ｓａ−１はセメント組成物１００質量％に対して１５．０質量％であった。
＜実施例４＞
アルミン酸ソーダＡｌ−１を０．８質量％と、ソーダ灰Ｎａ−１を１．２質量％と、クエン酸Ｃｉ−１を０．８質量％と、砂Ｓａ−１を１５．３質量％混合したこと以外は、実施例１と同様にしてセメントミルクを調製した。このセメントミルクを実施例４とした。なお、砂Ｓａ−１はセメント組成物１００質量％に対して１５．０質量％であった。
＜実施例５＞
砂Ｓａ−１を３０．６質量％混合したこと以外は、実施例１と同様にしてセメントミルクを調製した。このセメントミルクを実施例５とした。なお、砂Ｓａ−１はセメント組成物１００質量％に対して３０．０質量％であった。

<Example 1>
10% by weight of calcium aluminate CA90, 10% by weight of hydrofluoric acid type 2 anhydrous gypsum S8, 80% by weight of ordinary Portland cement N, 0.6% by weight of sodium aluminate Al-1 and soda ash Na -1 is 0.9 mass%, citric acid Ci-1 is 0.6 mass%, sand Sa-1 is 5.1 mass%, polymer is 4.08 mass%, and water is mixed. Cement milk was prepared. This cement milk was designated as Example 1. Sand Sa-1 is 100 mass of cement composition (calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, ordinary Portland cement N, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1). %, And the polymer was 4.00% by mass with respect to 100% by mass of the cement composition. Water was mixed in an amount of 45% by mass with respect to 100% by mass of the mixture of materials other than water (pavement injection material).
<Example 2>
Cement milk was prepared in the same manner as in Example 1 except that 15.3% by mass of sand Sa-1 was mixed. This cement milk was designated as Example 2. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 3>
Cement milk was prepared in the same manner as in Example 1 except that 15.3% by mass of sand Sa-1 and 0.01% by mass of antifoaming agent were mixed. This cement milk was designated as Example 3. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 4>
Sodium aluminate Al-1 is 0.8 mass%, soda ash Na-1 is 1.2 mass%, citric acid Ci-1 is 0.8 mass%, and sand Sa-1 is 15.3 mass%. Cement milk was prepared in the same manner as in Example 1 except for mixing. This cement milk was designated as Example 4. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 5>
Cement milk was prepared in the same manner as in Example 1 except that 30.6% by mass of sand Sa-1 was mixed. This cement milk was designated as Example 5. In addition, sand Sa-1 was 30.0 mass% with respect to 100 mass% of cement compositions.

<Comparative Example 1>
Cement milk was prepared in the same manner as in Example 1 except that 2.1% by mass of sand Sa-1 was mixed but no polymer was mixed. This cement milk was designated as Comparative Example 1. In addition, sand Sa-1 was 2.0 mass% with respect to 100 mass% of cement compositions.
<Comparative example 2>
Cement milk was prepared in the same manner as in Example 1 except that the polymer was not mixed. This cement milk was designated as Comparative Example 2.
<Comparative Example 3>
It replaced with sand Sa-1 (particle size: 90-1000 micrometers), and carried out similarly to Example 1 except having mixed sand Sa-2 (particle diameter: more than 1000 micrometers and 3000 micrometers or less) 15.3% by mass. Cement milk was prepared. This cement milk was designated as Comparative Example 3. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Comparative Example 4>
Cement milk was prepared in the same manner as in Example 1 except that 15.3% by mass of sand Sa-1 was mixed and 0.50% by mass of the polymer was mixed. This cement milk was designated as Comparative Example 4. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.

<Comparative Example 5>
Cement milk was prepared in the same manner as in Example 1 except that 35.7% by mass of sand Sa-1 was mixed. This cement milk was designated as Comparative Example 5. In addition, sand Sa-1 was 35.0 mass% with respect to 100 mass% of cement compositions.
<Comparative Example 6>
Calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1 are not mixed, and 20% by mass of fast-hardening material KA is a coagulation regulator. Cement milk was prepared in the same manner as in Example 1 except that 1.5% by mass of KSet and 15.3% by mass of sand Sa-1 were mixed. This cement milk was designated as Comparative Example 6. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions (ordinary Portland cement N, quick-hardening material KA, and setting regulator KSet).
<Comparative Example 7>
Calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1 are not mixed, and 20% by mass of fast-hardening material KA is a coagulation regulator. Cement milk was prepared in the same manner as in Example 1 except that 2.5% by mass of KSet and 15.3% by mass of sand Sa-1 were mixed. This cement milk was designated as Comparative Example 7. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions (ordinary Portland cement N, quick-hardening material KA, and setting regulator KSet).

<Comparative test 1 and evaluation>
For the cement milks of Examples 2 to 4 and Comparative Examples 6 and 7, the kneading temperature, the P funnel flow time, the pot life, the start time, and the termination were set at 5 ° C., 20 ° C. and 35 ° C., respectively. Time and compressive strength were measured respectively. Here, the kneading temperature is a temperature obtained by measuring the cement milk immediately after kneading with a thermometer. The P funnel flow-down time is a method according to the pre-packed concrete pouring mortar fluidity test method (JSCE-F521), that is, the cement funnel of the P funnel test apparatus is filled with cement milk, and the funnel at the lower end of the funnel is filled with cement. Flowing time when milk is spilled. The pot life is a time measured immediately after kneading and is a time until the P funnel flow time exceeds 11 seconds. The initial setting time and the final setting time of the setting were measured using an automatic setting tester in accordance with JIS R 5201. Specifically, the initial setting time is the time measured immediately after kneading, and is the time until the needle with a diameter of 1 mm stops 1 mm from the bottom of the cement milk. Is the time measured immediately after kneading until the needle with a diameter of 1 mm does not pierce the cement milk. Furthermore, the compressive strength is the strength measured according to JIS R 5201, and the compressive strength at a material age of 3 hours was measured. The initial setting time and the final setting time of the setting are collectively referred to as setting time. These results are shown in Table 4.

表４から明らかなように、凝結調整剤としてコーカセッターＫＳｅｔ（三菱マテリアル社製）を１．５質量％含む比較例６では、作業雰囲気温度５℃での可使時間が３０分以下であり、凝結調整剤としてコーカセッターＫＳｅｔ（三菱マテリアル社製）を２．０質量％含む比較例７では、作業雰囲気温度５℃及び２０℃における材齢３時間での圧縮強度が４．０Ｎ／ｍｍ²未満であった。これに対し、凝結調整剤としてＡｌ−１（アルミン酸ソーダ）、Ｎａ−１（ソーダ灰）及びＣｉ−１（クエン酸）を用いた実施例２〜４では、作業雰囲気温度５℃、２０℃及び３５℃における可使時間が３０〜７５分と比較的長く、かつ材齢３時間での圧縮強度が４．０Ｎ／ｍｍ²以上と高いことが分った。また消泡剤Ｄｅｆを混合した実施例３では、圧縮強度が６．３〜７．５Ｎ／ｍｍ²と実施例２及び４より高くなり、Ａｌ−１（アルミン酸ソーダ）、Ｎａ−１（ソーダ灰）及びＣｉ−１（クエン酸）の混合割合を実施例２及び３の約１．３倍に増やした実施例４では、可使時間が６０〜７５分と実施例２及び３より長くなることが分った。

As is apparent from Table 4, in Comparative Example 6 containing 1.5% by mass of the coca setter KSet (manufactured by Mitsubishi Materials Corporation) as a setting modifier, the pot life at a working atmosphere temperature of 5 ° C. is 30 minutes or less, In Comparative Example 7 containing 2.0% by mass of the coca setter KSet (manufactured by Mitsubishi Materials Corporation) as a setting modifier, the compressive strength at a working age of 5 ° C. and 20 ° C. at a material age of 3 hours is less than 4.0 N / mm ^2. Met. On the other hand, in Examples 2 to 4 using Al-1 (sodium aluminate), Na-1 (soda ash), and Ci-1 (citric acid) as a setting modifier, the working atmosphere temperature was 5 ° C, 20 ° C. It was found that the pot life at 35 ° C. was relatively long as 30 to 75 minutes, and the compressive strength at a material age of 3 hours was as high as 4.0 N / mm ² or more. In Example 3 in which the antifoaming agent Def was mixed, the compressive strength was 6.3 to 7.5 N / mm ^2, which was higher than those in Examples 2 and 4, and Al-1 (sodium aluminate) and Na-1 (soda). In Example 4 in which the mixing ratio of ash) and Ci-1 (citric acid) was increased to about 1.3 times that in Examples 2 and 3, the pot life was 60 to 75 minutes, which was longer than in Examples 2 and 3. I found out.

<Comparative test 2 and evaluation>
A bleeding test of the cement milks of Examples 1 to 5 and Comparative Examples 1 to 5 was performed. In this bleeding test, 1 liter of cement milk was first put in a container and then the lid was put on, and at the start of cement milk, bleeding water was collected and the amount of bleeding was measured. Next, the bleeding rate B _R (%) was calculated from the bleeding amount B _Q (ml) by the following equation (1).
B _R = (B _Q / 1000) × 100 (1)
Further, the properties of the surface of the cured product obtained by curing the cement milk were visually observed. The properties of the bleeding rate B _R and curing the surface shown in Table 5. Table 5 shows the types and contents of setting modifiers, the types and contents of sand, the contents of polymer P and defoaming agent Def, the kneading temperature at a working atmosphere temperature of 20 ° C., and the P funnel. The flow-down time, pot life, start time, and end time are also shown. The contents of sand, polymer P and antifoaming agent Def were the contents with respect to 100% by mass of the cement composition. Furthermore, bleeding is a phenomenon in which heavy material sinks down and light water rises to the surface when placing concrete. In addition, the atmospheric temperature at the time of kneading | mixing of the cement milk of the said Examples 1-5 and Comparative Examples 1-5 was 20 degreeC.

表５から明らかなように、砂の含有量が２．０質量％と少ない比較例１や、ポリマーを含まない比較例２や、砂の粒径が１０００〜３０００μｍと大きい比較例３や、ポリマーの含有量が０．５０質量％と少ない比較例４や、砂の含有量が３５．０質量％と多い比較例５では、ブリーディング率が２．１〜３．１％と比較的多かった。これらに対し、粒径が９０〜１０００μｍである砂を５．０〜３０．０質量％含有するとともに、ポリマーを４．００質量％含有する実施例１〜５では、ブリーディング率が０．７〜１．２と少ないことが分った。また比較例１〜５では、硬化体表面にひび割れが発生したり、硬化体表面が脆弱であったり、或いは材料が分離したのに対し、実施例１〜５では、硬化体表面が良好であることが分った。

As is apparent from Table 5, Comparative Example 1 with a low sand content of 2.0% by mass, Comparative Example 2 without a polymer, Comparative Example 3 with a large sand particle size of 1000 to 3000 μm, and a polymer In Comparative Example 4 with a low content of 0.50% by mass and Comparative Example 5 with a high sand content of 35.0% by mass, the bleeding rate was relatively high at 2.1 to 3.1%. On the other hand, in Examples 1-5 which contain 5.0-30.0 mass% of sand whose particle size is 90-1000 micrometers and contain 4.00 mass% of polymers, the bleeding rate is 0.7- It was found that there was only 1.2. In Comparative Examples 1 to 5, cracks occurred on the surface of the cured body, the surface of the cured body was fragile, or the material was separated, whereas in Examples 1 to 5, the surface of the cured body was good. I found out.

<Example 6>
15% by weight of calcium aluminate CA90, 15% by weight of hydrofluoric acid type 2 anhydrous gypsum S8, 70% by weight of ordinary Portland cement N, 0.6% by weight of sodium aluminate Al-1 and soda ash Na -1 0.9 mass%, citric acid Ci-1 0.6 mass%, diatomaceous filter aid H01 7.5 mass%, paper sludge ash H02 7.5 mass%, polymer Cement milk was prepared by mixing 4% by mass of P and 77.4% by mass of water. This cement milk was designated as Example 6. Diatomaceous filter aid H01 is a cement composition (calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, ordinary Portland cement N, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1). It is 7.5% by mass with respect to 100% by mass, the papermaking sludge ash H02 is 7.5% by mass with respect to 100% by mass of the cement composition, and the polymer P is 4% with respect to 100% by mass of the cement composition. %Met. Moreover, water was 65 mass% with respect to 100 mass% of the mixture (injection material for pavement bodies) other than this water.
<Example 7>
Cement milk was prepared in the same manner as in Example 6 except that 95.2% by mass of water was mixed. This cement milk was designated as Example 7. In addition, water was 80 mass% with respect to 100 mass% of injection materials for pavements.
<Example 8>
Cement milk was prepared in the same manner as in Example 6 except that 15% by mass of diatomaceous filter aid H01, 15% by mass of papermaking sludge ash H02, and 113.9% by mass of water were mixed. This cement milk was designated as Example 8. The diatomaceous filter aid H01 is 15% by mass with respect to 100% by mass of the cement composition, the papermaking sludge ash H02 is 15% by mass with respect to 100% by mass of the cement composition, and the polymer P is the cement composition. It was 4 mass% with respect to 100 mass%. Moreover, water was 85 mass% with respect to 100 mass% of injection materials for pavements.
<Example 9>
Cement milk was prepared in the same manner as in Example 6 except that 15% by mass of diatomaceous filter aid H01, 15% by mass of papermaking sludge ash H02, and 120.6% by mass of water were mixed. This cement milk was designated as Example 9. The diatomaceous filter aid H01 was 15% by mass with respect to 100% by mass of the cement composition, and the papermaking sludge ash H02 was 15% by mass with respect to 100% by mass of the cement composition. Moreover, water was 90 mass% with respect to 100 mass% of the injection material for pavements.
<Example 10>
Cement milk was prepared in the same manner as in Example 6 except that 25% by mass of diatomaceous filter aid H01, 25% by mass of papermaking sludge ash H02, and 184.8% by mass of water were mixed. This cement milk was designated as Example 10. The diatomaceous filter aid H01 was 25% by mass with respect to 100% by mass of the cement composition, and the papermaking sludge ash H02 was 25% by mass with respect to 100% by mass of the cement composition. Water was 120% by mass with respect to 100% by mass of the pavement injection material.

<Example 11>
Cement milk was prepared in the same manner as in Example 6 except that 7.5% by mass of natural non-fired vermiculite H03 was mixed in place of papermaking sludge ash H02. This cement milk was designated as Example 11. In addition, natural unbaked vermiculite H03 was 7.5 mass% with respect to 100 mass% of cement compositions.
<Example 12>
Cement milk was prepared in the same manner as in Example 6 except that 7.5% by mass of natural non-fired vermiculite H03 and 95.2% by mass of water were mixed in place of the papermaking sludge ash H02. This cement milk was designated as Example 12. Natural unfired vermiculite H03 was 7.5% by mass with respect to 100% by mass of the cement composition, and water was 80% by mass with respect to 100% by mass of the pavement injection material.
<Example 13>
Except that 15% by mass of diatomaceous filter aid H01, 15% by mass of natural unfired vermiculite H03 instead of paper sludge ash H02, and 120.6% by mass of water were mixed in the same manner as in Example 6. Cement milk was prepared. This cement milk was designated as Example 13. The diatomaceous filter aid H01 was 15% by mass with respect to 100% by mass of the cement composition, and the natural non-baked vermiculite H03 was 15% by mass with respect to 100% by mass of the cement composition. Moreover, water was 90 mass% with respect to 100 mass% of the injection material for pavements.
<Example 14>
Except that 25% by mass of diatomaceous filter aid H01, 25% by mass of natural unfired vermiculite H03 instead of paper sludge ash H02, and 184.8% by mass of water were mixed as in Example 6. Cement milk was prepared. This cement milk was designated as Example 14. The diatomaceous filter aid H01 was 25% by mass with respect to 100% by mass of the cement composition, and the natural non-baked vermiculite H03 was 25% by mass with respect to 100% by mass of the cement composition. Water was 120% by mass with respect to 100% by mass of the pavement injection material.
<Example 15>
Cement milk was prepared in the same manner as in Example 6 except that 15% by mass of diatomaceous filter aid H01 was mixed without mixing papermaking sludge ash H02. This cement milk was designated as Example 15. In addition, diatomaceous filter aid H01 was 15 mass% with respect to 100 mass% of cement compositions.

<Example 16>
Cement milk was prepared in the same manner as in Example 6 except that 15% by mass of diatomaceous filter aid H01 and 95.2% by mass of water were mixed without mixing papermaking sludge ash H02. This cement milk was designated as Example 16. In addition, the diatomaceous filter aid H01 was 15% by mass with respect to 100% by mass of the cement composition, and the water was 80% by mass with respect to 100% by mass of the pavement injection material.
<Example 17>
Cement milk was prepared in the same manner as in Example 6 except that 30% by mass of diatomaceous filter aid H01 and 120.6% by mass of water were mixed without mixing papermaking sludge ash H02. This cement milk was designated as Example 17. In addition, the diatomaceous filter aid H01 was 30% by mass with respect to 100% by mass of the cement composition, and the water was 90% by mass with respect to 100% by mass of the pavement injection material.
<Example 18>
Cement milk was prepared in the same manner as in Example 6 except that 50% by mass of diatomaceous filter aid H01 and 184.8% by mass of water were mixed without mixing papermaking sludge ash H02. This cement milk was designated as Example 18. In addition, the diatomaceous filter aid H01 was 50% by mass with respect to 100% by mass of the cement composition, and water was 120% by mass with respect to 100% by mass of the pavement injection material.
<Example 19>
Cement milk was prepared in the same manner as in Example 6 except that 7.5% by mass of natural non-baked vermiculite H03 and 74.8% by mass of water were mixed in place of the papermaking sludge ash H02 without mixing the polymer. Prepared. This cement milk was designated as Example 19. Natural unfired vermiculite H03 was 7.5% by mass with respect to 100% by mass of the cement composition, and water was 65% by mass with respect to 100% by mass of the pavement injection material.
<Example 20>
Cement milk was prepared in the same manner as in Example 6 except that 7.5% by mass of natural uncalcined vermiculite H03, 2% by mass of polymer, and 76.1% by mass of water were mixed in place of papermaking sludge ash H02. Prepared. This cement milk was designated as Example 20. In addition, natural non-baked vermiculite H03 is 7.5% by mass with respect to 100% by mass of the cement composition, the polymer is 2% by mass with respect to 100% by mass of the cement composition, and water is the injection material 100 for pavement. It was 65 mass% with respect to the mass%.

<Comparative Example 8>
Calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1 were not mixed, and the quick-hardening material KA was 30% by mass, and a coagulation modifier. Cement milk was prepared in the same manner as in Example 6 except that 1.5% by mass of KSet was mixed. This cement milk was designated as Comparative Example 8.
<Comparative Example 9>
Calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1 were not mixed, and the quick-hardening material KA was 30% by mass, and a coagulation modifier. Same as Example 6 except that 1.5% by weight of KSet, 15% by weight of diatomaceous filter aid H01, 15% by weight of paper sludge ash H02, and 120.6% by weight of water were mixed. Cement milk was prepared. This cement milk was designated as Comparative Example 9. The diatomaceous filter aid H01 is 15% by mass with respect to 100% by mass of the cement composition, the papermaking sludge ash H02 is 15% by mass with respect to 100% by mass of the cement composition, and water is injected for pavement. It was 90 mass% with respect to 100 mass% of materials.
<Comparative Example 10>
Cement milk was prepared in the same manner as in Example 6 except that 2.0% by mass of diatomaceous filter aid H01, 2.0% by mass of papermaking sludge ash H02, and 70.2% by mass of water were mixed. did. This cement milk was designated as Comparative Example 10. The diatomaceous filter aid H01 is 2.0% by mass with respect to 100% by mass of the cement composition, the papermaking sludge ash H02 is 2.0% by mass with respect to 100% by mass of the cement composition, and the water is It was 65 mass% with respect to 100 mass% of the injection material for pavements.
<Comparative Example 11>
Cement milk was prepared in the same manner as in Example 6 except that 45% by mass of diatomaceous filter aid H01, 45% by mass of papermaking sludge ash H02, and 126.1% by mass of water were mixed. This cement milk was designated as Comparative Example 11. The diatomaceous filter aid H01 is 45% by mass with respect to 100% by mass of the cement composition, the papermaking sludge ash H02 is 45% by mass with respect to 100% by mass of the cement composition, and water is injected for pavement. It was 65 mass% with respect to 100 mass% of materials.
<Comparative Example 12>
Cement milk was prepared in the same manner as in Example 6 except that 15% by mass of diatomaceous earth H04 was mixed without mixing diatomaceous filter aid H01 and papermaking sludge ash H02. This cement milk was designated as Comparative Example 12. In addition, diatomaceous earth H04 was 15 mass% with respect to 100 mass% of cement compositions.

<Comparative test 3 and evaluation>
Table 6 shows the blending ratios of the cement milks of Examples 6 to 20 and Comparative Examples 8 to 12. The cement composition A in FIG. 6 is composed of 70% by weight of ordinary Portland cement N, 15% by weight of calcium aluminate CA90, 15% by weight of hydrofluoric acid type 2 anhydrous gypsum S8, sodium aluminate Al— 1 is 0.6% by mass, soda ash Na-1 is 0.9% by mass, and citric acid Ci-1 is 0.6% by mass. Cement composition B is a normal Portland cement. 70% by mass of N, 30% by mass of the fast-hardening material KA, and 1.5% by mass of the setting modifier KSet are mixed. Table 7 shows the blending ratio of each raw material of these cement compositions A and B.
The cement milk kneaded materials of Examples 6 to 20 and Comparative Examples 8 to 12 were each poured into a 4 × 4 × 16 cm mold and molded, and demolded at a material age of 3 hours. These compressive strengths were determined by methods in accordance with the provisions of JIS R 5201 “Cement physical test method”. Table 8 shows the respective compressive strengths in Examples 6 to 20 and Comparative Examples 8 to 12 obtained in this way. In Table 8, the cement composition, the mixing ratio of the water retention material to the cement composition, the mixing ratio of water to the pavement injection material, and the addition amount of the polymer P are shown together. Moreover, the atmospheric temperature at the time of kneading | mixing of the cement milk of the said Examples 6-20 and Comparative Examples 8-12 was 20 degreeC.

表８から明らかなように、比較例１１では保水性材料を９０質量％と多く混合したため、材齢３時間での圧縮強度を測定できなかったのに対し、実施例６〜２０と比較例８〜１０及び１２では、材齢３時間での圧縮強度に顕著な差異を生じていない。このため実施例６〜２０に含まれる舗装体用注入材は比較例１及び２に含まれる従来の舗装体用注入材と同様の強度を保つことができることが分った。

As apparent from Table 8, in Comparative Example 11, since the water-retaining material was mixed as much as 90% by mass, the compressive strength at the age of 3 hours could not be measured, whereas Examples 6 to 20 and Comparative Example 8 No. 10 to 12 and no significant difference in compressive strength at the age of 3 hours. For this reason, it turned out that the injection | pouring material for paving bodies contained in Examples 6-20 can maintain the same intensity | strength as the injection material for conventional paving bodies contained in Comparative Examples 1 and 2.

<Comparative test 4 and evaluation>
The cement milks of Examples 6 to 20 and Comparative Examples 8 to 12 were respectively poured into 4 × 4 × 16 cm molds and demolded at a material age of 3 days. After these were immersed in water at 20 ° C. for 24 hours or more, the masses were measured (saturated masses). The mass of those dried for 24 hours or more with a 60 ° C. ventilation dryer was measured (absolute dry mass). From these, the maximum water absorption was calculated by the following equation.
Maximum water absorption rate (%) = 100 × (saturated mass−absolute dry mass) / absolute dry mass Table 8 shows the maximum water absorption rates in Examples 6 to 20 and Comparative Examples 8 to 12 determined by this equation.
As is apparent from Table 8, the cement milks of Examples 6 to 20 and Comparative Examples 8 to 12 do not have a significant difference in the maximum water absorption rate. Therefore, the pavement injection material included in Examples 6 to 20 has the same maximum water absorption rate as the conventional pavement injection material included in Comparative Examples 8 to 12, and this is filled in the pavement. As a result, it has been found that the surface temperature of the pavement can be effectively prevented from increasing.

<Comparative test 5 and evaluation>
The cement milks of Examples 6 to 20 and Comparative Examples 8 to 12 were respectively poured into 4 × 4 × 16 cm molds and demolded at a material age of 3 days. The masses of those dried for 24 hours with a 60 ° C. ventilator were measured (dry mass). Thereafter, these were left in a room with a temperature of 20 ° C. and a humidity of 90% for 24 hours, and the mass after 24 hours was measured (hygroscopic mass). From these, the moisture absorption rate was calculated by the following equation.
Moisture absorption rate (%) = 100 × (moisture absorption mass−dry mass) / dry mass Table 8 shows the respective moisture absorption rates in Examples 6 to 20 and Comparative Examples 8 to 12 determined by this equation.
As is apparent from Table 8, the moisture absorption rates of the cured bodies obtained by curing the cement milks of Comparative Examples 10 and 12 were as low as 4.5% and 2.4%, whereas the cement milks of Examples 6 to 20 were low. It was found that the moisture absorption rate of the cured product was as high as 5.2 to 14.4%. Further, it was found that the cement milks of Examples 6 to 20 and Comparative Examples 8 and 9 did not have a significant difference in moisture absorption. Therefore, the pavement injection material included in Examples 6 to 20 has the same moisture absorption rate as the conventional pavement injection material included in Comparative Examples 8 and 9, and this is filled in the pavement. Thus, it is considered that water vapor in the atmosphere can be effectively attached, and it has been found that the water vapor will prevent the temperature of the pavement filled with the water from rising.

<Comparative test 6 and evaluation>
A pavement made of asphalt having a shape of 30 cm × 30 cm × 10 cm and having an open particle size with a porosity of 24% was prepared. The cement milk shown in Example 6 was filled in the void portion of the pavement, and the water-retaining pavement 1 filled with the cement milk shown in Example 6 was obtained. Further, another pavement made of asphalt having the same shape and size as this is prepared, and the cement milk shown in Comparative Example 12 is filled by filling the gap portion of this pavement with the cement milk shown in Comparative Example 12. A water-retaining pavement 2 was obtained. The obtained water-retaining pavements 1 and 2 were cured in the air at 20 ° C. for 1 day and then immersed in water for 7 days to make each water-retaining material saturated.
Next, an infrared lamp is placed on the upper part of each of the water-retaining pavements 1 and 2 to 40 cm, and the lamps are turned on to irradiate each surface of the water-retaining pavements 1 and 2 for 12 hours. The lamp was extinguished for 12 hours as one cycle, and this was repeated for 10 cycles. On the other hand, temperature sensors were installed on the surfaces of the water-retaining pavements 1 and 2, respectively, the surface temperatures of the water-retaining pavements 1 and 2 were measured by the temperature sensors, and recorded on a temperature recorder. A graph showing the results is shown in FIG.
As is clear from FIG. 1, the surface temperature of the water-retaining pavement 2 using the pavement injection material that does not contain the diatomaceous filter aid H01 of Comparative Example 12 gradually increases from around 4 cycles. I found out. On the other hand, it was found that in the water-retaining pavement 1 using the pavement injecting material of Example 6, the increase in the surface temperature was suppressed over 10 cycles or more. This is considered to be due to the result of preventing water vapor from adhering to the diatomaceous filter aid H01 contained in the water retention material and drying the water retention material itself.

<Comparative test 7 and evaluation>
The cement milk shown in Example 6 and the cement milk shown in Comparative Example 12 were each poured into a 4 × 4 × 16 cm mold and demolded at a material age of 3 days. Thus, a water-retained cured body 1 made of cement milk shown in Example 6 having a size of 4 × 4 × 16 cm and a water-retained cured body 2 made of cement milk shown in Comparative Example 12 were obtained. The obtained water-retaining cured bodies 1 and 2 were cured in the air at 20 ° C. for 1 day, and then immersed in water for 7 days.
Next, an infrared lamp is disposed on each of the water-retaining cured bodies 1 and 2 to 40 cm, and the lamp is turned on to irradiate each surface of the water-retaining cured bodies 1 and 2 with the infrared rays for 12 hours. The lamp was extinguished for 12 hours as one cycle, and this was repeated for 10 cycles. In the meantime, the mass of each of the water-retaining cured bodies 1 and 2 was measured, and the change in mass was calculated. The graph which shows the change of each mass of the water retention hardened | cured material 1 and 2 which is this result is shown in FIG.
As is clear from FIG. 2, in the water-retaining cured body 1 using the pavement injection material of Example 6, the mass gradually decreases while repeating the evaporation and adsorption of moisture, while the comparative example 12 It was found that the mass of the cured body 2 using the pavement injection material not containing the diatomaceous filter aid H01 was significantly reduced. This is considered to be due to the result that water vapor is adsorbed on the diatomaceous filter aid H01 contained in the water retentive material and the mass of the water vapor is contained in the water retentive cured body 1.

<Example 2>
Example 2 is the same cement milk as Example 2 listed in Tables 4 and 5 above, but in order to facilitate the comparison between the following Examples 21 to 24 and the cement milks of Comparative Examples 13 and 14. This is a new description here. 10% by weight of calcium aluminate CA90, 10% by weight of hydrofluoric acid type 2 anhydrous gypsum S8, 80% by weight of ordinary Portland cement N, 0.6% by weight of sodium aluminate Al-1 and soda ash Na -1 is 0.9 mass%, citric acid Ci-1 is 0.6 mass%, sand Sa-1 is 15.3 mass%, polymer is 4.08 mass%, and water is mixed. Cement milk was prepared. This cement milk was designated as Example 2. Sand Sa-1 is 100 mass of cement composition (calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, ordinary Portland cement N, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1). % Of the polymer was 4.00% by mass with respect to 100% by mass of the cement composition. Water was mixed in an amount of 45% by mass with respect to 100% by mass of the mixture of materials other than water (pavement injection material).

<Example 21>
Cement milk was prepared in the same manner as in Example 2 except that 0.6% by mass of soda ash Na-1 was mixed. This cement milk was determined as Example 21. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 22>
Sodium aluminate Al-2 (commercial product) was used instead of sodium aluminate Al-1 (comminuted product), and citric acid Ci-2 (commercial product) was used instead of citric acid Ci-1 (comminuted product). Except for this, cement milk was prepared in the same manner as in Example 2. This cement milk was determined as Example 22. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 23>
Cement milk was prepared in the same manner as in Example 2 except that citric acid Ci-2 (commercial product) was used instead of citric acid Ci-1 (pulverized product). This cement milk was determined as Example 23. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 24>
Cement milk was prepared in the same manner as in Example 2 except that calcium aluminate CA80 was used instead of calcium aluminate CA90. This cement milk was designated as Example 24. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.

<Example 25>
Cement milk was prepared in the same manner as in Example 2 except that 0.96% by mass of soda ash Na-1 and 0.36% by mass of citric acid Ci-1 were mixed. This cement milk was determined as Example 25. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 26>
Cement milk was prepared in the same manner as in Example 2 except that 0.36% by mass of soda ash Na-1 and 0.36% by mass of citric acid Ci-1 were mixed. This cement milk was designated as Example 26. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Example 27>
Cement milk was prepared in the same manner as in Example 2 except that 0.96% by mass of soda ash Na-1 and 0.96% by mass of citric acid Ci-1 were mixed. This cement milk was designated as Example 27. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.

<Comparative Example 13>
Instead of sodium aluminate Al-1 (crushed product), sodium aluminate Al-2 (commercial product) was used, soda ash Na-1 (crushed product) was used, soda ash Na-2 (commercial product) was used, Cement milk was prepared in the same manner as in Example 2 except that citric acid Ci-2 (commercial product) was used instead of citric acid Ci-1 (pulverized product). This cement milk was designated as Comparative Example 13. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.
<Comparative example 14>
Cement milk was prepared in the same manner as in Example 2 except that calcium aluminate CA70 was used instead of calcium aluminate CA90. This cement milk was designated as Comparative Example 13. In addition, sand Sa-1 was 15.0 mass% with respect to 100 mass% of cement compositions.

<Comparative test 8 and evaluation>
For the cement milks of Example 2, Examples 21 to 27 and Comparative Examples 13 and 14, the ambient temperature during kneading was 5 ° C., 20 ° C. and 35 ° C., respectively, and the kneading temperature, P funnel flow time, pot life, The compressive strength at the start time, the end time, and the material age of 3 hours was measured. Here, each measurement of the above kneading temperature, P funnel flow time, pot life, start time, end time, and compressive strength at a material age of 3 hours was carried out in the same manner as in Comparative Test 1. These results are shown in Tables 9 and 10 together with the vitrification ratio of calcium aluminate, the type and blending ratio of the setting modifier, and the mixing ratio of water to the pavement injection material.

表２、表９及び表１０から明らかなように、アルミン酸ソーダＡｌ、ソーダ灰Ｎａ及びクエン酸Ｃｉの平均粒径が、９０μｍを越えかつ１５０μｍ以下と比較的大きいものと、平均粒径が１５０μｍを越えかつ５００μｍ以下と極めて大きいものだけを含む比較例１３では、作業雰囲気温度５℃での可使時間が２５分と短く、作業雰囲気温度５℃であって材齢３時間での圧縮強度が３．２Ｎ／ｍｍ²以下と低かった。また上記比較例１３では、凝結時間、即ち凝結の始発時間及び終結時間が作業雰囲気温度によって大きく変化した。これに対し、アルミン酸ソーダＡｌ、ソーダ灰Ｎａ又はクエン酸Ｃｉのうちの少なくとも１種の第１〜第３粒子の混合割合が本発明の範囲内にあり、かつ第３粒子を第１粒子より多く含むとともに第２粒子より多く含む実施例２及び実施例２１〜２７では、作業雰囲気温度５℃での可使時間が４５〜５５分と長くなり、作業雰囲気温度５℃であって材齢３時間での圧縮強度が４．６〜５．８Ｎ／ｍｍ²と高くなることが分った。また実施例２及び２１〜２７では、凝結時間、即ち凝結の始発時間及び終結時間が作業雰囲気温度によってあまり大きく変化しないことが分った。

As apparent from Tables 2, 9, and 10, the average particle size of sodium aluminate Al, soda ash Na, and citric acid Ci is more than 90 μm and 150 μm or less, and the average particle size is 150 μm. In Comparative Example 13 including only a very large material exceeding 5 μm and 500 μm or less, the pot life at a working atmosphere temperature of 5 ° C. is as short as 25 minutes, the working atmosphere temperature is 5 ° C., and the compressive strength at a material age of 3 hours is It was as low as 3.2 N / mm ² or less. In Comparative Example 13, the setting time, that is, the start time and the setting time of the setting changed greatly depending on the working atmosphere temperature. On the other hand, the mixing ratio of at least one of the first to third particles of sodium aluminate Al, soda ash Na or citric acid Ci is within the scope of the present invention, and the third particles are more than the first particles. In Example 2 and Examples 21 to 27 containing a large amount and containing more than the second particles, the pot life at a working atmosphere temperature of 5 ° C. was as long as 45 to 55 minutes, the working atmosphere temperature was 5 ° C., and the age of 3 It was found that the compressive strength over time was as high as 4.6 to 5.8 N / mm ² . Further, in Examples 2 and 21 to 27, it was found that the setting time, that is, the start time and the end time of the setting did not change greatly depending on the working atmosphere temperature.

On the other hand, as apparent from Tables 9 and 10, in Comparative Example 14 containing calcium aluminate with a vitrification rate of 70%, the pot life at a working atmosphere temperature of 5 ° C. was as short as 20 minutes, and the working atmosphere temperature was 5 ° C. The compressive strength at a material age of 3 hours was as low as 2.8 N / mm ² . In Comparative Example 14, the setting time, that is, the start time and the setting time of the setting changed greatly depending on the working atmosphere temperature. On the other hand, in Example 2, Examples 21-23 and Examples 25-27 containing calcium aluminate with a vitrification rate of 90%, and Example 24 containing calcium aluminate with a vitrification rate of 80%, working atmosphere It can be seen that the pot life is increased to 45 to 55 minutes at a temperature of 5 ° C., and the compressive strength at a working age temperature of 5 ° C. and a material age of 3 hours is increased to 4.6 to 5.8 N / mm ^2. It was. Moreover, in Example 2 and Examples 21-27, it turned out that setting time, ie, the start time and end time of setting, do not change so much with working atmosphere temperature.

<Example 20>
This Example 20 is the same cement milk as Example 20 listed in Table 6 and Table 8 above, but to facilitate comparison of the following Examples 28-34 with the cement milk of Comparative Examples 15 and 16. , Here again. 15% by weight of calcium aluminate CA90, 15% by weight of hydrofluoric acid type 2 anhydrous gypsum S8, 70% by weight of ordinary Portland cement N, 0.6% by weight of sodium aluminate Al-1 and soda ash Na -1 0.9% by weight, citric acid Ci-1 0.6% by weight, diatomaceous filter aid H01 7.5% by weight, natural unfired vermiculite H03 7.5% by weight, Cement milk was prepared by mixing 2% by mass of polymer P and 76.1% by mass of water. This cement milk was designated as Example 20. Diatomaceous filter aid H01 is a cement composition (calcium aluminate CA90, hydrofluoric acid type 2 anhydrous gypsum S8, ordinary Portland cement N, sodium aluminate Al-1, soda ash Na-1 and citric acid Ci-1). 7.5% by mass with respect to 100% by mass, natural uncalcined vermiculite H03 is 7.5% by mass with respect to 100% by mass of the cement composition, and polymer P is 2% with respect to 100% by mass of the cement composition. It was mass%. Moreover, water was 65 mass% with respect to 100 mass% of the mixture (injection material for pavement bodies) other than this water.

<Example 28>
Cement milk was prepared in the same manner as in Example 20 except that 0.6% by mass of soda ash Na-1 was mixed. This cement milk was designated as Example 28.
<Example 29>
Sodium aluminate Al-2 (commercial product) was used instead of sodium aluminate Al-1 (comminuted product), and citric acid Ci-2 (commercial product) was used instead of citric acid Ci-1 (comminuted product). Except for this, cement milk was prepared in the same manner as in Example 20. This cement milk was designated as Example 29.
<Example 30>
Cement milk was prepared in the same manner as Example 20 except that citric acid Ci-2 (commercial product) was used instead of citric acid Ci-1 (pulverized product). This cement milk was designated as Example 30.
<Example 31>
Cement milk was prepared in the same manner as in Example 20 except that calcium aluminate CA80 was used instead of calcium aluminate CA90. This cement milk was designated as Example 31.

<Example 32>
Cement milk was prepared in the same manner as in Example 20 except that 0.96% by mass of soda ash Na-1 and 0.36% by mass of citric acid Ci-1 were mixed. This cement milk was designated as Example 32.
<Example 33>
Cement milk was prepared in the same manner as in Example 20 except that 0.36% by mass of soda ash Na-1 and 0.36% by mass of citric acid Ci-1 were mixed. This cement milk was designated as Example 33.
<Example 34>
Cement milk was prepared in the same manner as in Example 20 except that 0.96 mass% of soda ash Na-1 and 0.96 mass% of citric acid Ci-1 were mixed. This cement milk was designated as Example 34.

<Comparative Example 15>
Instead of sodium aluminate Al-1 (crushed product), sodium aluminate Al-2 (commercial product) was used, soda ash Na-1 (crushed product) was used, soda ash Na-2 (commercial product) was used, Cement milk was prepared in the same manner as Example 20 except that citric acid Ci-2 (commercial product) was used instead of citric acid Ci-1 (pulverized product). This cement milk was designated as Comparative Example 15.
<Comparative Example 16>
Cement milk was prepared in the same manner as in Example 20 except that calcium aluminate CA70 was used instead of calcium aluminate CA90. This cement milk was designated as Comparative Example 16.

<Comparative test 9 and evaluation>
For the cement milk of Example 20, Examples 28 to 34 and Comparative Examples 15 and 16, the ambient temperature during kneading was 5 ° C, 20 ° C and 35 ° C, respectively, and the kneading temperature, pot life and material age were 3 hours. The compressive strength of each was measured. Here, each measurement of the kneading temperature and pot life was performed in the same manner as in Comparative Test 1. Each measurement of the compressive strength at the age of 3 hours was performed in the same manner as in Comparative Test 3. These results are shown in Tables 11 and 12 together with the vitrification rate of calcium aluminate, the types and blending ratios of the setting modifiers, and the mixing ratio of water to the pavement injection material.

表２、表１１及び表１２から明らかなように、アルミン酸ソーダＡｌ、ソーダ灰Ｎａ及びクエン酸Ｃｉの平均粒径が、９０μｍを越えかつ１５０μｍ以下と比較的大きいものと、平均粒径が１５０μｍを越えかつ５００μｍ以下と極めて大きいものだけを含む比較例１５では、作業雰囲気温度５℃であって材齢３時間での圧縮強度が１．４Ｎ／ｍｍ²以下と低かった。これに対し、アルミン酸ソーダＡｌ、ソーダ灰Ｎａ又はクエン酸Ｃｉのうちの少なくとも１種の第１〜第３粒子の混合割合が本発明の範囲内にあり、かつ第３粒子を第１粒子より多く含むとともに第２粒子より多く含む実施例２０及び実施例２８〜３４では、作業雰囲気温度５℃であって材齢３時間での圧縮強度が４．０〜４．３Ｎ／ｍｍ²と高くなることが分った。

As is apparent from Tables 2, 11, and 12, the average particle size of sodium aluminate Al, soda ash Na, and citric acid Ci exceeds 90 μm and is 150 μm or less, and the average particle size is 150 μm. In Comparative Example 15, which included only a very large material exceeding 5 μm and 500 μm or less, the compressive strength at a working atmosphere temperature of 5 ° C. and a material age of 3 hours was as low as 1.4 N / mm ² or less. On the other hand, the mixing ratio of at least one kind of the first to third particles of sodium aluminate Al, soda ash Na or citric acid Ci is within the scope of the present invention, and the third particles are more than the first particles. In Example 20 and Examples 28 to 34 containing a large amount and containing more than the second particles, the working atmosphere temperature is 5 ° C., and the compressive strength at a material age of 3 hours is as high as 4.0 to 4.3 N / mm ^2. I found out.

On the other hand, as is clear from Tables 11 and 12, in Comparative Example 16 containing calcium aluminate with a vitrification rate of 70%, the working atmosphere temperature is 5 ° C., and the compressive strength at a material age of 3 hours is 1.7 N. / Mm ² was low. In contrast, in Example 20, Examples 28-30 and Examples 32-34 containing calcium aluminate with a vitrification rate of 90%, and Example 31 containing calcium aluminate with a vitrification rate of 80%, working atmosphere It was found that the compressive strength at a temperature of 5 ° C. and a material age of 3 hours was as high as 4.0 to 4.3 N / mm ² .

It is a figure which shows the change of the temperature of the pavement body surface which filled the space | gap part with the cement milk of Example 6 and Comparative Example 12. It is a figure which shows the change of the mass of the hardening body which hardened the cement milk of Example 6 and Comparative Example 12.

Claims (8)

5 to 30% by mass of sand having a particle size of 90 to 1000 μm and 1 to 10 of re-emulsified powder resin with respect to 100% by mass of cement composition containing 100 to 1000% by mass of cement mineral with respect to 100% by mass of the admixture. An injection material for pavement containing mass%,
The said admixture is sodium aluminate 0.2-35.% With respect to the quick-hardening component in which calcium aluminate and inorganic sulfate are mixed at a mass ratio of 1: (0.5-3). Including a setting modifier consisting of 0% by weight, inorganic carbonate 0.2-35.0% by weight and carboxylic acids 0.1-15.0% by weight,
Vitrification rate of the calcium aluminate is 80% or more,
When one of the sodium aluminate, the inorganic carbonate and the carboxylic acid is set to 100% by mass, the other two types are included in an amount of 60 to 160% by mass,
When the total amount of the selected one kind of setting modifier among the sodium aluminate, the inorganic carbonate or the carboxylic acid is 100% by mass, the average particle size is 45 μm. 10 to 45% by mass of first particles exceeding 90 μm and less, 30 to 70% by mass of second particles exceeding 90 μm and having an average particle size of not more than 150 μm, and 3 to 5% third particles having an average particle size exceeding 150 μm and not more than 500 μm An injection material for a pavement comprising 30% by mass and containing more of the second particles than the first particles and more than the third particles. When cement milk is prepared by mixing 35 to 55% by mass of water with respect to 100% by mass of the pavement injection material, the pot life is 30 to 75 minutes, and the compressive strength at the age of 3 hours is The injection material for pavement according to claim ^2, which is 4.5 N / mm ² or more. A step of preparing cement milk by mixing water with the pavement injection material according to claim 1 or 2,
Filling the void portion of the pavement having a porosity of 40 to 10% with the cement milk. An injecting material for a pavement containing 5 to 80% by mass of a water retaining material with respect to 100% by mass of a cement composition containing 100 to 1000% by mass of cement mineral with respect to 100% by mass of an admixture,
The water retention material is composed of one or more selected from the group consisting of diatomaceous filter aid, paper sludge incinerated ash, and natural unfired vermiculite,
The said admixture is sodium aluminate 0.2-35.% With respect to the quick-hardening component in which calcium aluminate and inorganic sulfate are mixed at a mass ratio of 1: (0.5-3). Including a setting modifier consisting of 0% by weight, inorganic carbonate 0.2-35.0% by weight and carboxylic acids 0.1-15.0% by weight,
Vitrification rate of the calcium aluminate is 80% or more,
When one of the sodium aluminate, the inorganic carbonate and the carboxylic acid is set to 100% by mass, the other two types are included in an amount of 60 to 160% by mass,
When the total amount of the selected one kind of setting modifier among the sodium aluminate, the inorganic carbonate or the carboxylic acid is 100% by mass, the average particle size is 45 μm. 10 to 45% by mass of first particles exceeding 90 μm and less, 30 to 70% by mass of second particles exceeding 90 μm and having an average particle size of not more than 150 μm, and 3 to 5% third particles having an average particle size exceeding 150 μm and not more than 500 μm An injection material for a pavement comprising 30% by mass and containing more of the second particles than the first particles and more than the third particles. When cement milk is prepared by mixing 80 to 150% by weight of water with respect to 100% by weight of the pavement injection material, the pot life is 30 to 75 minutes, and the compressive strength at the age of 3 hours is The injectable material for a pavement according to claim 4, which is 0.5 N / mm ² or more and further has a water absorption after curing of 50 to 90% by mass. When cement milk is prepared by mixing 65 to 80% by mass of water with respect to 100% by mass of the pavement injection material, the pot life is 30 to 75 minutes, and the compressive strength at a material age of 3 hours is The injectable material for a pavement according to claim 4, which is 4.0 N / mm ² or more and further has a water absorption after curing of 35 to 50% by mass.   The injection for pavement according to any one of claims 4 to 6, wherein when the cement milk prepared by mixing water with the injection for pavement is cured, the cured product has a moisture absorption of 5 to 15% by mass. Wood. A step of preparing cement milk by mixing water with the pavement injection material according to any one of claims 4 to 7,
Filling the void portion of the pavement having a porosity of 40 to 10% with the cement milk.

Images