JP2007045650A - Polymer cement grout material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent material separation phenomenon of fine aggregates without impairing fluidity as a grout material, and further suppress cracking due to temperature stress and drying shrinkage even after hardening, and for concrete cross-section repair or thickening The present invention provides a polymer cement grout material which can be suitably used in the present invention and has excellent adhesion to concrete and has a sufficient surface hardness after curing.
SOLUTION Polymer cement grout material is a total of 10 to 120 parts by weight of classified fly ash or fine powder of blast furnace slag having a brane fineness of 5000 cm ² / g or more, and two or more kinds of powder water reducing agents for 100 parts by weight of cement. 0.5 to 2.5 parts by mass, 2 to 10 parts by mass of shrinkage reducing agent, 5 to 30 parts by mass of re-emulsifying powder resin, 120 to 400 parts by mass of fine aggregate, It is obtained by mixing and used as a grout material for cross-section repair or thickening of concrete structures.
[Selection figure] None

Description

  The present invention relates to a polymer cement grout material, and more particularly, to a polymer cement grout material used for cross-sectional repair or thickening of a concrete structure deteriorated due to deterioration phenomena such as neutralization, salt damage, alkali aggregate reaction, and frost damage. .

In general, it is desirable that the material used for cross-sectional repair or thickening of concrete structures be as similar as possible to the mechanical properties of the concrete material of interest, and therefore, cementitious materials are preferably used. In places where the usage environment is harsh, polymer cement-based materials are often used from the standpoint of integration with the substrate and suppression of penetration of harmful substances from the outside.
In addition, spraying and grout filling methods are used for repairing large sections of concrete structures. However, the grout filling method, which can be cast-molded, has low human burden and is highly stable by manual operation, is large. Many applications have been applied to scale cross-section repair or thickening.

As a grout material used for repairing or increasing the cross section of a large cross section of such a concrete structure, Japanese Patent Application Laid-Open No. 2002-285153 discloses cement, classified fly ash, and cement containing calcium sulfoaluminate-based expansion material. There is disclosed a cement-type grout material composition containing an inorganic inorganic powder, a drying shrinkage reducing agent, and a fine aggregate, to which no polymer is added.
On the other hand, a polymer cement grout material has a large decrease in pouring and filling properties due to an increase in viscosity due to polymer and a large increase in drying shrinkage. Therefore, JP-A-10-265251 discloses cement, fine limestone powder, silica sand, In addition to the powder resin and powder additive, smectite type clay mineral, silica fume or reducing shrinkage agent is uniformly mixed at a predetermined ratio, and diethylene glycol is further added in an amount of 0.05 to 0.5 mass. % Blended semi-flexible pavement polymer cement composition is disclosed.

However, when such a polymer cement composition is used for repairing a large cross section such as repair of a beam or floor slab, cracks are likely to occur in the repaired cross section, and water, carbon dioxide gas, There is a drawback in that object ions and the like are likely to enter, and as a result, the durability of the repaired section is impaired.
Further, when the viscosity of the polymer cement composition is lowered simply by adding a water reducing agent or increasing the amount of water, there is a problem that aggregates settle and cracks occur.
In particular, this tendency appears in a material using a re-emulsifying powder resin, so that it is difficult to commercialize a one-component polymer cement grout material at a commercial level.

  In view of this point, Japanese Patent Application Laid-Open No. 2005-82416 includes Portland cement, an expanding material, a re-emulsifying powder resin, an aggregate, a short fiber substance, a shrinkage reducing agent, a water reducing agent, and an antifoaming agent. There is described a polymer cement composition in which short fibers are mixed into a materialized polymer cement grout material so that cracking is less likely to occur.

However, such polymer cement composition, because of the addition of short fibers, are sought to grout the generic and is not secured fluidity of J ₁₄ funnel flow time standard value of Japan Highway Public Corporation Standard Have the following issues.

  Moreover, in the cross-section repair of a concrete structure, the cross-section repair material is almost always repaired with a thin layer (for example, about 1 to 4 cm) compared to the thickness of the original member concrete (for example, about 20 to 50 cm). In addition, since it is an outdoor environment that is easy to dry, it is a big problem that sufficient adhesion with concrete is not obtained, but even with a thin cross-section repair surface, adhesion with concrete is sufficient In addition, the surface hardness after curing is required to be sufficient.

  Accordingly, an object of the present invention is to provide a concrete structure capable of preventing the material separation phenomenon of fine aggregates without impairing the fluidity as a grout material, and further suppressing the occurrence of cracks due to temperature stress and drying shrinkage even after hardening. It is to provide a polymer cement grout material which can be suitably used for cross-sectional repair or thickening of an object.

The present inventors have found that a polymer cement grout material containing a predetermined substance in a specific blending ratio achieves the above object, and has completed the present invention.
That is, the polymer cement grout material of the present invention comprises 10 to 120 parts by mass of classified fly ash or blast furnace slag fine powder having a brane fineness of 5000 cm ² / g or more, and two or more kinds of powder water reducing agents with respect to 100 parts by mass of cement. 0.5 to 2.5 parts by mass in total, 2 to 10 parts by mass of shrinkage reducing agent, 5 to 30 parts by mass of re-emulsifying powder resin, 120 to 400 parts by mass of fine aggregate, and further mixed with water It is characterized by becoming.
Preferably, in the polymer cement grout material of the present invention, the powder water reducing agent comprises a polycarboxylic acid water reducing agent, a melamine water reducing agent and / or a naphthalene water reducing agent, and more preferably. In addition, 0.1 to 0.5 parts by mass of the polycarboxylic acid-based water reducing agent and 0.3 to 2.0 parts by mass of a melamine-based water reducing agent and / or a naphthalene-based water reducing agent are added to 100 parts by mass of cement. It is characterized by.

More preferably, the polymer cement grout of the present invention, the Japan Highway Public Corporation Test Method JHS 312-1992 as _{J 14} funnel flow time specified in (non-shrink mortar quality control test method) is 6-10 seconds , Water is mixed.

The polymer cement grout material of the present invention has sufficient fluidity, is uniform with no material separation phenomenon, and can effectively suppress cracking due to temperature stress and drying shrinkage even after curing.
In addition, the polymer cement grout material of the present invention is durable because it has good adhesion to the concrete structure matrix, excellent surface hardness, and can prevent cracking even when the cross-section repair or thickened surface is a large cross-section. It can be excellent in properties.

The present invention is illustrated by the following preferred examples, but is not limited thereto.
The polymer cement grout material of the present invention comprises 10 to 120 parts by weight of classified fly ash or fine powder of blast furnace slag having a brane fineness of 5000 cm ² / g or more with respect to 100 parts by weight of cement. 0.5 to 2.5 parts by mass, 2 to 10 parts by mass of shrinkage reducing agent, 5 to 30 parts by mass of re-emulsifying powder resin, 120 to 400 parts by mass of fine aggregate, and further mixed with water This is a polymer cement grout material.
By blending as such a specific composition, the material separation phenomenon of the fine aggregate is prevented without impairing the fluidity as a grout material, and the adhesion to concrete is greatly improved. Further, the occurrence of cracks due to drying shrinkage can be suppressed, and the surface hardness after curing can be improved.

The cement used in the polymer cement grout material of the present invention can be selected in consideration of on-site construction conditions and the like, and is not particularly limited. For example, various portland cements such as ordinary, early strength, moderate heat, and ultra early hardness. These various Portland cements can be used alone or in combination of two or more, such as various mixed cements such as blast furnace cement obtained by mixing fly ash, blast furnace slag, and the like.
In particular, it is preferable to use early-strength cement because it is inexpensive and exhibits early strength.

The cement includes known blast furnace slag powder, fly ash, silica fume, limestone powder, quartz powder, dihydrate gypsum, hemihydrate gypsum, anhydrous gypsum, quick lime-based expansion material, calcium sulfoaluminate-based expansion material, and the like. Of admixture can be added.
The blending ratio is not particularly limited and can be appropriately designed. In particular, the calcium sulfoaluminate-based expansion material is preferably 5 to 20 parts by mass with respect to 100 parts by mass of cement, and this is a self-shrinkage. This is because it becomes easy to suppress excessive expansion and prevent excessive expansion.

Furthermore, in the polymer cement grout material of the present invention, 10 to 120 parts by mass of classified fly ash or blast furnace slag fine powder having a fineness (specific surface area) of 5000 cm ² / g or more is mixed with 100 parts by mass of the cement.
The fineness (specific surface area) of the classified fly ash or blast furnace slag fine powder is required to be 5000 cm ² / g or more.
When the specific surface area of the brane is less than 5000 cm ² / g, the fine aggregates that are blended are separated in the grout material during the construction of the grout material for cross-sectional repair, and are easy to settle. This is because it becomes a cured body, and this becomes more prominent when a drying shrinkage reducing agent is added.
Such fineness (Blaine specific surface area) represents the Blaine specific surface area defined in JIS A 6206.

Therefore, by mixing the classified fly ash having a specific surface area of 5000 cm ² / g or fine powder of blast furnace slag with the polymer cement grout material of the present invention, the apparent viscosity is increased without reducing the fluidity of the grout material. It becomes possible to improve the separation resistance of the fine aggregate.
As the fineness, it is sufficient to 5000 cm ² / g or more as described above, and more preferably, especially 5500cm ² / g or more 12000 ² / g or less.

As the classified fly ash, fly ash discharged as coal ash is usually classified by a boiler such as a thermal power plant using a classifier such as a cyclone, and the fineness is adjusted to 5000 cm ² / g or more. As blast furnace slag fine powder, blast furnace slag normally produced as a by-product at the blast furnace steel mill is used, and the powder size adjusted to a particle size of 5000 cm ² / g or more is used. Can do.

As a compounding quantity of the said classification | category fly ash and blast furnace slag fine powder, it is 10-120 mass parts with respect to 100 mass parts of said cement, Preferably it is 20-100 mass parts.
When the blending amount is within such a range, the polymer cement grout material of the present invention is effective for separating fine aggregates such as silica sand and preventing sedimentation.
When the blending amount of the classified fly ash and the ground granulated blast furnace slag is less than 10 parts by mass, the effect of preventing separation is not sufficient. On the other hand, when it exceeds 120 parts by mass, the initial strength is lowered, which is not preferable.

Furthermore, the polymer cement grout material of the present invention is a total of 0.5 to 2.5 parts by mass, preferably 0.5 to 1.5 parts by mass of two or more kinds of powder water reducing agents with respect to 100 parts by mass of the cement. It needs to be mixed.
As the powder water reducing agent, known ones such as lignin sulfonic acid type, oxy organic acid type, naphthalene type, polycarboxylic acid type, melamine type salt can be used, but from the viewpoint of reducing shrinkage, water reducing effect It is desirable to use a polycarboxylic acid water reducing agent having a large size.
Furthermore, in addition to the polycarboxylic acid-based water reducing agent, a melamine-based water reducing agent and / or a naphthalene-based water reducing agent is blended, and two or more kinds of water reducing agents are used in combination.
By using two or more water reducing agents in combination, shrinkage can be reduced without separating fine aggregates.

The mixing amount of the polycarboxylate-based powder water reducing agent is preferably 0.1 to 0.5 parts by mass and more preferably 0.2 to 0.4 parts by mass with respect to 100 parts by mass of cement.
If the amount is less than 0.1 parts by mass, a predetermined water reducing effect cannot be obtained, and if the amount exceeds 0.5 parts by mass, there is a risk of delaying hardening of the cement and settling and separating of the aggregate.
Similarly, the mixing amount of the melamine powder water reducing agent or naphthalene powder water reducing agent is preferably 0.3 to 2.0 parts by mass, and 0.4 to 1.5 parts by mass with respect to 100 parts by mass of cement. More preferred.
If the amount is less than 0.3 parts by mass, a sufficient water reducing effect cannot be obtained. If the amount is 2.0 parts by mass or more, the water reducing effect does not change, and there is a possibility that an adverse effect on strength development may occur.
Furthermore, the total blending amount of the polycarboxylate-based powder water reducing agent and the melamine-based water reducing agent and / or naphthalene-based water reducing agent is 0.5 to 2.5 parts by mass, preferably 0 with respect to 100 parts by mass of cement. 0.5 to 1.5 parts by mass is preferable from the viewpoint of suppressing the delay in hardening of the cement, ensuring fluidity and reducing the unit water amount.

Furthermore, in the present invention, 2 to 10 parts by mass of a drying shrinkage reducing agent is mixed with 100 parts by mass of cement.
As the drying shrinkage reducing agent, a lower alcohol alkylene oxide adduct, a glycol ether / amino alcohol derivative, a polyether, a low molecular weight alkylene oxide copolymer or the like can be used, regardless of its composition and shape (liquid or powder). Any one or more drying shrinkage reducing agents can be used as long as they can reduce drying shrinkage by reducing the surface tension of water in the cured grout material for cross-sectional repair.
The mixing amount of the drying shrinkage reducing agent is 2 to 10 parts by mass, preferably 2 to 5 parts by mass with respect to 100 parts by mass of cement. If it is less than 2 parts by mass, the effect of reducing drying shrinkage is small, and even if it exceeds 10 parts by mass, the effect of reducing drying shrinkage is hardly changed, which is not economical.

In addition, as the re-emulsifying powder resin used for the polymer cement grout material of the present invention, those specified in JIS A 6203 can be used, for example, polyacrylic acid ester, styrene butadiene, ethylene vinyl acetate, acetic acid. Resins such as vinyl / versacic acid vinyl ester, vinyl acetate / versacic acid vinyl ester / acrylic acid ester, and the like can be used, and these can be appropriately selected and used alone or in combination.
The
In particular, when used for a member requiring durability such as water resistance, it is preferable to use an acrylic re-emulsifying powder resin.

The re-emulsified powder resin is a powder resin obtained by spray-drying a polymer dispersion specified in JIS A 6203, and emulsifies again when water is added. The polymer dispersion is a dispersion of the above-mentioned polymer fine particles in water. It is in a floating state.
Methods for stabilizing the polymer include, for example, a carboxyl method (anionization method) for copolymerizing acrylic acid, a protective colloid method for polymerizing in an aqueous solution of a water-soluble polymer such as polyvinyl alcohol, and a polymerization reactive surfactant. There are a copolymerization method and a stabilization method using a non-polymerization reactive surfactant.
The method for producing such a re-emulsified powder resin is not particularly limited, and these polymer dispersions can be prepared using any known method such as a powdering method or an anti-blocking method.
The re-emulsified liquid of the re-emulsified powder resin preferably has a minimum film forming temperature of 0 ° C. or higher.
When the minimum film-forming temperature is 0 ° C. or higher, the adhesion to concrete and the surface hardness of the polymer cement grout material are high, and the early strength development is excellent.

As a compounding quantity of this re-emulsion type powder resin, 5-30 mass parts is mix | blended with respect to 100 mass parts of cement, It is desirable that it is 7-15 mass parts suitably.
This is because, when the re-emulsified powder resin is mixed at such a mixing ratio, it has good adhesiveness to concrete when used as a polymer cement grout material.
If the re-emulsified powder resin is less than 5 parts by mass with respect to the cement, the adhesion performance with concrete cannot be sufficiently exhibited, and if it exceeds 30 parts by mass, the fluidity and strength of the polymer cement grout material are reduced, This is because there is a risk that the performance of the concrete structure as a cross-section repair or thickening material may be hindered.

As fine aggregates used for the polymer cement grout material of the present invention, river sand, sea sand, mountain sand, crushed sand, No. 3-8 quartz sand, limestone, slag fine aggregate, etc. can be used, and fine powder It is preferable to use fine aggregates such as silica sand and limestone whose particle size is adjusted and do not contain coarse aggregates.
The blending ratio is 120 to 400 parts by mass, preferably 150 to 300 parts by mass, with respect to 100 parts by mass of the cement.
This is because, by mixing fine aggregates at such a blending ratio, the workability is improved, a practical strength development property is obtained, and a repair material having curing shrinkage having no practical problem is obtained.
If the fine aggregate is less than 120 parts by mass with respect to the cement, there is a risk of cracking due to drying shrinkage or heat of hydration, and if it exceeds 400 parts by mass, the filling property to the place where the concrete structure is suspended is sufficient. This is because there is a possibility that the strength development may be hindered.

  In the polymer cement grout material of the present invention, in addition to the above materials, addition of a setting retarder, a curing accelerator, a thickener, an antifoaming agent, a foaming agent, a rust inhibitor, a defrosting agent, a colorant, a water retention agent, etc. The agent can be used as long as the object of the present invention is not substantially inhibited.

In addition, the polymer cement grout material of the present invention is kneaded by adding an appropriate amount of water, but if the water does not contain a component that adversely affects the hardening of cement or the like, tap water, ground water, river water, etc. Although water can be used, for example, one that is compatible with “JIS A 5308 Appendix 9 Water for Mixing Ready-Mixed Concrete” is preferable, but water contained in an admixture can also be used.
The amount of water is adjusted so that the J ₁₄ funnel flow-down time specified in Japan Highway Public Corporation Test Method JHS 312-1992 (No Shrinkage Mortar Quality Control Test Method) is 6 to 10 seconds. It is preferable for more effectively expressing the effect.

  The polymer cement grout material of the present invention may be mixed at the time of construction or a part of the material may be mixed in advance. This is preferable in that it eliminates the time and trouble of weighing.

  The polymer cement grout material obtained in this way is useful for construction and civil engineering fields.For example, after removing and removing a part of concrete and mortar part of concrete structures, etc. By removing the rust of the reinforcing bars and using the grout material of the necessary thickness, sufficient surface strength and adhesion can be imparted to the building.

  As a construction method of the polymer cement grout material of the present invention, a known method can be used, for example, pumping, pouring, etc. can be used, and as a curing method, curing is performed at an environmental temperature at a construction site. Moreover, sufficient initial strength can be expressed in a short time.

The present invention will be described based on the following examples, comparative examples and test examples.
(Materials used)
・ Cement Hayashi Portland Cement (manufactured by Sumitomo Osaka Cement)
・ Fly ash A (classified fly ash; brane fineness 5600 cm ² / g)
Product name "FA20" (manufactured by Techno Resource)
・ Fly ash B (Brain fineness: 4000 cm ² / g)
Product name "Fly Ash" (manufactured by Kansai Electric Power Company)
・ Blast furnace slag powder A (Blast furnace slag fine powder; Blaine fineness 7800 cm ² / g)
Product name "Fine Serament 10A" (Daiichi Cement)
・ Blast furnace slag powder B (Brain fineness 4000 cm ² / g)
Product name "ESMENT" (manufactured by Sumitomo Metal Industries)
・ Expansion material (calcium sulfoaluminate-based expansion material)
Product name “Sachs” (manufactured by Sumitomo Osaka Cement)
However, the above-mentioned brane fineness represents a specific surface area measured by the brane method.

・ Powder water reducing agent Trade name “Mighty 21P” (Polycarboxylate-based product of Kao Corporation; Powder water reducing agent A)
Product name “SECAMENT FF86 / 100” (Melamine sulfonic acid manufactured by Nihon Sika Corporation)
Salt system; powder water reducing agent B)
-Antifoam product name "Adecanate B-211F" (manufactured by Asahi Denka)
・ Drying shrinkage reducing agent Product name “Tester F # 100” (manufactured by Sumitomo Osaka Cement)
・ Re-emulsifying powder resin Product name “Mobilith DM2072P” (Nichigo Movinyl)
・ Dry silica sand Silica sand No. 3 and silica sand No. 6 mixed at a ratio of 1: 1 ・ Fiber (vinylon fiber)
Product name "REC15 6mm" (Kuraray)

Examples 1-2 and Comparative Examples 1-7
Using a high-speed hand mixer in a constant temperature bath at 20 ° C., each material was uniformly kneaded at a blending ratio shown in Table 1 below to obtain a polymer cement grout material.
In Comparative Example, in place of the fly ash A (classification fly ash Blaine fineness 5600cm ² / g) used in Example, Blaine fineness 4000 cm ² / g of usual fly ash B (Kansai Electric Power Co., Ltd.) further, in place of the blast furnace slag a (ground granulated blast furnace slag of Blaine fineness 7800cm ² / g), using a blast furnace slag powder B of Blaine fineness 4000 cm ² / g, if necessary, a short fiber vinylon A fiber REC15 6 mm (manufactured by Kuraray Co., Ltd.) was used.
However, the amount of water to be blended in each polymer cement grout, _{J 14} funnel flow time specified in the Japan Highway Public Corporation Test Method JHS 312-1992 (non-shrink mortar quality control test method) is 6-10 seconds Adjusted to be added.
However, in Comparative Example 6 and Comparative Example 7, in order to obtain a certain performance as a grout material, it is difficult to adjust the flow time, so an appropriate amount of water shown in Table 1 was added.

Test Example Each polymer cement grout material obtained in Examples 1 and 2 and Comparative Examples 1 to 7 was subjected to the following test.
The results are also shown in Table 1 above.
(1) according to flowability test Japan Highway Public Corporation Test Method JHS _312-1992, it was measured flow time of each polymer cement grout material (s) by _{J 14} funnel.
(2) Material separation resistance test Each polymer cement grout material obtained by kneading is placed in a container with an internal volume of 5 L, and allowed to stand for 1 hour after kneading, and the presence or absence of fine aggregate separation and bleeding is visually observed. did.
However, the material separation resistance was evaluated according to the following criteria.
○: No fine aggregate separation and no bleeding ×: Fine aggregate separation or bleeding, or both

(3) Compressive strength test According to the Japan Highway Public Corporation test method JHS 312-1992, each polymer cement grout material is poured into a formwork, and each cylindrical specimen of φ50 mm × h100 mm is made, and it is 28 days at 20 ° C. and 60% RH for 28 days. The compressive strength of each cylindrical specimen was measured (after 4 weeks of age).
(4) Drying Shrinkage Test According to the Japan Highway Public Corporation Material Construction Material (No. 1) “Quality Standard Test of Cross Section Restoration Material for Formwork Concrete Work”, each polymer cement grout material is made into a 40 mm × 40 mm × 160 mm formwork. After casting, the mold was removed after 48 hours, and cured for 28 days at a temperature of 20 ° C. and a humidity of 60% RH, and the drying shrinkage was measured.

As shown in Table 1, when the polymer cement grout of Example 1 and 2 was adjusted the amount of water in J ₁₄ funnel flow time Japan Highway Public Corporation standard without causing even segregation, compressive strength 45N / mm ² or more And it satisfies the shrinkage of 5 × 10 ⁻⁴ or less after 28 days of age, and has good properties.
On the other hand, in Comparative Examples 1 and 2 in which the brane fineness of fly ash and blast furnace slag powder was lowered, sedimentation of fine aggregate was observed and the homogeneity of the material was not maintained. There is a possibility of clogging of grout material in the equipment and cracking on the repairing section of concrete structures.

In Comparative Example 3 in which the amount of the shrinkage reducing agent contained is reduced, although material separation or the like is not observed, the amount of dry shrinkage is large, and cracking may occur during construction on site.
Further, in Comparative Example 4 in which the amount of aggregate was increased, although the amount of drying shrinkage was small, material separation was observed and the compressive strength was also low.

In the grout material of Comparative Example 5 in which the powder water reducing agent used is one kind of polycarboxylate, the amount of water to be blended is reduced and the amount of drying shrinkage is reduced as compared with the grout material of Example 1. Aggregate sedimentation was observed and material separation occurred.
In Comparative Example 6 the powder water-reducing agent was melamine one, _{J 14} funnel flow time specified in JHS 312-1992 (non-shrink mortar quality control test method) is adjusted to be 6 to 10 seconds In spite of this, material separation was observed and the compressive strength was reduced even though the flow time was slow.
Furthermore, Comparative Example 7, which is intended to suppress cracks by adding short fibers, is a technique disclosed in Japanese Patent Application Laid-Open No. 2005-82416, and the J ₁₄ funnel flow time is not in the range of 6 to 10 seconds, 22.9 seconds.
In addition, when the amount of water added is increased in Comparative Example 7, aggregate separation occurs, drying shrinkage increases, and strength decreases.

The polymer cement grout material of the present invention can be suitably used for construction in the field of construction and civil engineering, for example, for use as a cross-section repair or thickening material for concrete structures under piers or harbors.

Claims (4)

10 to 120 parts by mass of classified fly ash or fine powder of blast furnace slag with a brane fineness of 5000 cm ² / g or more per 100 parts by mass of cement, and 0.5 to 2.5 parts by mass in total of two or more powder water reducing agents A polymer cement comprising 2-10 parts by mass of a shrinkage reducing agent, 5-30 parts by mass of a re-emulsifying powder resin, 120-400 parts by mass of a fine aggregate, and further mixed with water. Grout wood.   2. The polymer cement grout material according to claim 1, wherein the powder water reducing agent comprises a polycarboxylic acid water reducing agent and a melamine water reducing agent and / or a naphthalene water reducing agent.   The polymer cement grout material according to claim 2, wherein 0.1 to 0.5 parts by mass of the polycarboxylic acid-based water reducing agent, 0.1 parts by mass of the melamine-based water reducing agent and / or naphthalene-based water reducing agent are added to 100 parts by mass of the cement. 3 to 2.0 parts by mass of a polymer cement grout material. In claims 1-3 polymer cement grout of any one of claim wherein the _{J 14} funnel flow time specified in the Japan Highway Public Corporation Test Method JHS 312-1992 (non-shrink mortar quality control test method) is 6-10 seconds A polymer cement grout material obtained by mixing water.