JP7084200B2 - Admixture composition for hydraulic composition - Google Patents

Description

The present invention relates to an admixture composition for a hydraulic composition.
The present invention also relates to a dispersant composition for a water-hard composition, a water-hard composition, a method for producing a water-hard composition, and a method for improving the fluidity of the water-hard composition.
The present invention also relates to a hydration heat generation inhibitor for a water-hard composition, a water-hard composition and a method for suppressing hydration heat generation of a water-hard composition.

The dispersant for the hydraulic composition is a chemical admixture used to reduce the unit water amount required to obtain the required slump and improve the workability of the hydraulic composition by dispersing cement particles. Is. Conventionally, the dispersant includes a lignin sulfonic acid-based dispersant, a naphthalene-based dispersant such as a naphthalene sulfonic acid formaldehyde condensate, and a copolymer of a monomer having a carboxylic acid and a monomer having an alkylene glycol chain. Known are polycarboxylic acid-based dispersants, melamine-based dispersants such as melamine sulfonic acid formaldehyde condensates, and the like.

While lignin sulfonic acid-based dispersants and polycarboxylic acid-based dispersants are inexpensive and have high water-reducing performance, they have a problem of high curing delay, which delays the finishing process of the concrete casting surface and the demolding of the formwork. There are problems that the productivity of concrete decreases and the construction period becomes long.

Patent Document 1 describes a concrete admixture containing a cement dispersant and a specific nonionic surfactant in a predetermined weight ratio.
Patent Document 2 describes a workability improver for improving the workability of a cement composition containing a specific polyalkylene oxide derivative and / or a specific hydrocarbon derivative. Patent Document 2 also describes a cement water reducing agent containing the workability improving agent and the water reducing agent.
Patent Document 3 describes a slurry composed of water and a water-hard composition containing a β-naphthalene sulfonic acid formaldehyde condensate and a nonionic surfactant having an oxyethylene chain.
Patent Document 4 describes a cement additive composed of a formalin condensate of a naphthalene sulfonic acid metal salt and a polyoxyethylene-based compound.
Patent Document 5 describes a method for producing a concrete product, in which a desired concrete product is formed from concrete to which an anionic surfactant is added, and the molded product is steam-cured at atmospheric pressure.

On the other hand, it has been conventionally proposed to use a surfactant as a cement admixture. Patent Document 6 describes a cement admixture containing a sulfuric acid ester-type anionic surfactant and a polyoxyalkylene-based or polyhydric alcohol-based nonionic surfactant.

In recent years, the size of concrete structures in the field of civil engineering and construction has been increasing, and a large amount of concrete is placed in the pedestals and anchors of long bridges, the foundations of high-rise buildings, the bottoms of LNG tanks and nuclear power plants. So-called mass concrete construction is increasing. While these mascot cleats generate heat due to hydration of cement, heat is insufficiently dissipated, so heat accumulates inside the concrete structure, the temperature rises, and temperature stress is generated due to the temperature difference from the outside. Based on temperature cracks may occur.

As a method of preventing temperature cracking, it is conceivable to keep the amount of temperature rise of concrete low and to improve the heat dissipation condition. In order to suppress the temperature rise of concrete, a super-delaying agent such as carboxylate, gluconate or silica fluoride, which delays the hydration reaction of cement, is added to the concrete kneaded material. The effect of delaying the hydration time of cement, that is, the effect of extending the setting time, is obtained, and the final amount of temperature rise and the rate of rise are the same as or slightly smaller than that of concrete without adding anything, and the effect is not expected so much. Can not.

When mixed cement is used, a two-component mixed cement whose main component is slag and ordinary or moderate heat Portland cement, or a three-component mixed cement consisting of slag, ordinary Portland cement and fly ash is used. However, new equipment for mixing cement and mixed materials and equipment for stocking mixed cement are required, which causes problems such as increased initial investment.

Other construction methods include a method of embedding a pipe in a concrete structure in advance and passing water through it to cool the concrete structure (pipe cooling method), and a method of pre-cooling the concrete material (pre-cooling method). .. However, the pipe cooling method has problems in improving work efficiency, such as complicated construction and time-consuming work, and the cost is higher than normal construction. In precooling, the coolant used for cooling (for example, liquid nitrogen) is expensive. Therefore, there are problems in terms of construction, such as being uneconomical.

Non-Patent Document 1 discloses that by adding a sorbitol fatty acid ester to a concrete kneaded product, the final temperature rise due to hydration of concrete does not change, but there is an effect of reducing the heat generation rate.
Further, Patent Document 7 discloses an additive for cement that easily suppresses the temperature rise and the rate of rise of concrete by adding a compound obtained by esterification of a polyhydric alcohol and a higher fatty acid to a concrete kneaded product. ing.
Further, Patent Document 8 discloses an admixture for high-fluidity concrete, which contains a water-soluble polymer containing a polyalkylene glycol, a fatty acid ester derivative, an acrylic polymer derivative, and a polycarboxylate salt. ing.

Japanese Unexamined Patent Publication No. 61-281054 Japanese Patent Application Laid-Open No. 2003-165755 Japanese Unexamined Patent Publication No. 55-023047 Japanese Unexamined Patent Publication No. 60-011255 Japanese Unexamined Patent Publication No. 48-028525 Japanese Unexamined Patent Publication No. 50-150724 Japanese Unexamined Patent Publication No. 6-171997 Japanese Unexamined Patent Publication No. 10-158046

Toshitsugu Tanaka, Masayuki Ueno, Yoshihide Shimoyama, "Cement / Concrete Papers (Characteristics of Concrete Using Organic Substances that Suppress Heat of Hydration)", Cement Association, No. 52, 1998, p. 218-223

The present invention provides a dispersant composition for a hydraulic composition from which a hydraulic composition having excellent fluidity can be obtained.

Further, it has been found that when the cement additive described in Patent Document 7 is used, there is a problem that the hydration reaction is significantly delayed and the condensation and strength development time are delayed, so that the construction period is lengthened.

INDUSTRIAL APPLICABILITY The present invention provides a hydration heat generation inhibitor for a water-hard composition capable of suppressing a temperature rise due to hydration heat generation when water is brought into contact with the water-hard powder.

The present invention comprises (A) at least one (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less.
(B1) Nonionic surfactant represented by the following general formula (B11), nonionic surfactant represented by the following general formula (B12), and nonionic surfactant represented by the following general formula (B13). With at least one of the nonionic surfactants selected from the surfactants,
Contains,
The present invention relates to an admixture composition for a hydraulic composition.

〔式中、
Ｒ^１１、Ｒ^３１：それぞれ、炭素数８以上２２以下のアルキル基、炭素数８以上２２以下のアルケニル基、炭素数８以上２２以下のアラルキル基、及び炭素数８以上２２以下の置換アリール基から選ばれる基
Ｒ^２１：炭素数７以上２１以下のアルキル基、炭素数７以上２１以下のアルケニル基、炭素数７以上２１以下のアラルキル基、及び炭素数７以上２１以下の置換アリール基から選ばれる基
Ｒ^２２：炭素数２以上４以下のアルキレン基
Ｘ^１：炭素数１以上３以下のアルキル基、及び－Ｒ^２２－ＯＨで表される基から選ばれる基Ｒ^３２、Ｒ^３３：それぞれ、水素原子又は炭素数１以上３以下のアルキル基
ＡＯ：炭素数２以上４以下のアルキレンオキシ基
ｐ１：３以上１００以下の数
ｑ１、ｒ１：それぞれ、０以上の数であり、ｑ１とｒ１の合計は、０．５以上１００以下の数
である。〕

[In the ceremony,
R ¹¹ and R ³¹ : From an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an aralkyl group having 8 to 22 carbon atoms, and a substituted aryl group having 8 to 22 carbon atoms, respectively. Group selected R ²¹ : Selected from an alkyl group having 7 or more and 21 or less carbon atoms, an alkenyl group having 7 or more and 21 or less carbon atoms, an aralkyl group having 7 or more and 21 or less carbon atoms, and a substituted aryl group having 7 or more and 21 or less carbon atoms. Group R ²² : An alkylene group having 2 or more and 4 or less carbon atoms X ¹ : An alkyl group having 1 or more and 3 or less carbon atoms and a group selected from a group represented by -R ²² -OH R ³² and R ³³ : hydrogen, respectively. Atomic or alkyl group with 1 or more and 3 or less carbon number AO: alkyleneoxy group with 2 or more and 4 or less carbon atoms p1: Numbers of 3 or more and 100 or less q1 and r1: 0 or more, respectively, and the total of q1 and r1 is , 0.5 or more and 100 or less. ]

The present invention is at least one (poly) glycoside having (A) an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less. , (A) component],
(B1) Nonionic surfactant represented by the following general formula (B11), nonionic surfactant represented by the following general formula (B12), and nonionic surfactant represented by the following general formula (B13). At least one nonionic surfactant selected from the surfactants [hereinafter referred to as (B1) component] and
The present invention relates to a dispersant composition for a hydraulic composition containing.

[In the ceremony,
R ¹¹ and R ³¹ : From an alkyl group having 8 to 22 carbon atoms, an alkenyl group having 8 to 22 carbon atoms, an aralkyl group having 8 to 22 carbon atoms, and a substituted aryl group having 8 to 22 carbon atoms, respectively. Group selected R ²¹ : Selected from an alkyl group having 7 or more and 21 or less carbon atoms, an alkenyl group having 7 or more and 21 or less carbon atoms, an aralkyl group having 7 or more and 21 or less carbon atoms, and a substituted aryl group having 7 or more and 21 or less carbon atoms. Group R ²² : An alkylene group having 2 or more and 4 or less carbon atoms X ¹ : An alkyl group having 1 or more and 3 or less carbon atoms and a group selected from a group represented by -R ²² -OH R ³² and R ³³ : hydrogen, respectively. Atomic or alkyl group with 1 or more and 3 or less carbon number AO: alkyleneoxy group with 2 or more and 4 or less carbon atoms p1: Numbers of 3 or more and 100 or less q1 and r1: 0 or more, respectively, and the total of q1 and r1 is , 0.5 or more and 100 or less. ]

Further, the present invention is a hydraulic composition containing a hydraulic powder, water, a component (A), and a component (B1).
The total content of the component (A) and the component (B1) is 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the hydraulic powder.
Regarding hydraulic composition.

Further, the present invention is a method for producing a hydraulic composition, which comprises mixing a hydraulic powder, water, a component (A), and a component (B1).
The total content of the component (A) and the component (B1) is 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the hydraulic powder. Mix to be,
The present invention relates to a method for producing a hydraulic composition.

Further, in the present invention, the component (A) and the component (B1) are added to a water-hard composition containing water and a water-hard powder, and the component (A) and the component (A) are added to 100 parts by mass of the water-hard powder. (B1) The present invention relates to a method for improving the fluidity of a water-hard composition, which comprises 0.05 parts by mass or more and 4.0 parts by mass or less as the total amount of the components.

The present invention comprises (A) at least one (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less.
(B2) Nonionic surfactant represented by the following general formula (B21), nonionic surfactant represented by the following general formula (B22), nonionic surfactant represented by the following general formula (B23). At least a nonionic surfactant selected from a surfactant and a nonionic surfactant represented by the following general formula (B24) and having an HLB value of 2 or more and 11 or less. One kind and
The present invention relates to an admixture composition for a hydraulic composition containing.

[In the ceremony,
R ^11b , R ^31b : From an alkyl group having 8 or more and 22 carbon atoms, an alkenyl group having 8 or more and 22 carbon atoms, an aralkyl group having 8 or more and 22 carbon atoms, and a substituted aryl group having 8 or more and 22 carbon atoms, respectively. Selected groups R ^21b and R ^41b : Alkyl groups with 7 or more and 21 or less carbon atoms, alkenyl groups with 7 or more and 21 or less carbon atoms, aralkyl groups with 7 or more and 21 or less carbon atoms, and substitutions with 7 or more and 21 or less carbon atoms, respectively. Group selected from aryl groups R ^22b : alkylene group having ² or more and 4 or less carbon atoms: alkyl group having 1 or more and 3 or less carbon atoms, and R ^22b , a group selected from groups represented by -OH, R ^32b , R ^33b : Hydrogen atom or alkyl group having 1 or more and 3 or less carbon atoms AO: alkyleneoxy group having 2 or more and 4 or less carbon atoms p2: Number of 0.5 or more and 20 or less q2, r2: Number of 0 or more, respectively. , Q2 and r2 are totals of 0.5 or more and 20 or less. ]

The present invention is at least one (poly) glycoside having (A) an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less. , (A) component],
(B2) Nonionic surfactant represented by the following general formula (B21), nonionic surfactant represented by the following general formula (B22), nonionic surfactant represented by the following general formula (B23). At least a nonionic surfactant selected from a surfactant and a nonionic surfactant represented by the following general formula (B24) and having an HLB value of 2 or more and 11 or less. One type [hereinafter referred to as (B2) component] and
The present invention relates to a hydration heat suppressant for a hydraulic composition containing.

[In the ceremony,
R ^11b , R ^31b : From an alkyl group having 8 or more and 22 carbon atoms, an alkenyl group having 8 or more and 22 carbon atoms, an aralkyl group having 8 or more and 22 carbon atoms, and a substituted aryl group having 8 or more and 22 carbon atoms, respectively. Selected groups R ^21b and R ^41b : Alkyl groups with 7 or more and 21 or less carbon atoms, alkenyl groups with 7 or more and 21 or less carbon atoms, aralkyl groups with 7 or more and 21 or less carbon atoms, and substitutions with 7 or more and 21 or less carbon atoms, respectively. Group selected from aryl groups R ^22b : alkylene group having ² or more and 4 or less carbon atoms: alkyl group having 1 or more and 3 or less carbon atoms, and R ^22b , a group selected from groups represented by -OH, R ^32b , R ^33b : Hydrogen atom or alkyl group having 1 or more and 3 or less carbon atoms AO: alkyleneoxy group having 2 or more and 4 or less carbon atoms p2: Number of 0.5 or more and 20 or less q2, r2: Number of 0 or more, respectively. , Q2 and r2 are totals of 0.5 or more and 20 or less. ]

Further, the present invention is a water-hardening composition containing a water-hardening powder, water, a component (A), and a component (B2), and the total content of the component (A) and the component (B2). The present invention relates to a water-hardening composition having an amount of 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the water-hardening powder.

Further, the present invention is a method for producing a hydraulic composition, which comprises mixing a hydraulic powder, water, a component (A), and a component (B2).
The total content of the component (A) and the component (B2) is 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the hydraulic powder. Mix to be,
The present invention relates to a method for producing a hydraulic composition.

Further, in the present invention, the component (A) and the component (B2) are added to a water-hard composition containing water and a water-hard powder, and the component (A) and the component (A) are added to 100 parts by mass of the water-hard powder. (B2) The present invention relates to a method for suppressing hydration heat generation of a water-hard composition, which comprises 0.05 parts by mass or more and 4 parts by mass or less as the total amount of the components.

According to the present invention, there is provided a dispersant composition for a hydraulic composition, which can obtain a hydraulic composition having excellent fluidity.

Further, according to the present invention, a hydration heat generation inhibitor for a hydraulic composition, a water-hard composition, and water of a water-hard composition, which can suppress a temperature rise due to hydration heat generation when water is brought into contact with a hydraulic powder. A method for suppressing Japanese heat generation is provided.

Schematic diagram showing a method for measuring the amount of heat insulation temperature rise due to heat generation of hydration of cement in the examples.

[Micible composition for hydraulic composition]
The present invention relates to an admixture composition for a hydraulic composition containing a component (A) and a component (B1). This admixture composition for a water-hard composition can be used, for example, as the dispersant composition for a water-hard composition of the present invention.
The present invention also relates to an admixture composition for a hydraulic composition containing a component (A) and a component (B2). This admixture composition for a water-hard composition can be used, for example, as a hydration heat-generating inhibitor for a water-hard composition of the present invention.

[Dispersant composition for hydraulic composition]
The details of the effect manifestation mechanism of the dispersant composition for hydraulic composition of the present invention are unknown, but it is presumed as follows.
In general, polyols such as sugar have the property of adsorbing to cement particles, so the (poly) glycoside of component (A) is adsorbed on the surface of cement particles with the hydrophobic group facing the liquid phase. It is inferred that. Further, it is presumed that the hydrophobic group of the nonionic surfactant of the component (B1) coordinates with the hydrophobic group of the (poly) glycoside of the component (A) to form an aggregate. It is presumed that the formation of such a pseudo-aggregate causes a three-dimensional repulsive force between the cement particles and improves the fluidity of the hydraulic composition.

<Ingredient (A)>
The component (A) is at least one (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less.

The number of carbon atoms of the alkyl group or alkenyl group of the component (A) is 8 or more, and 20 or less, preferably 18 or less, from the viewpoint of ease of forming an aggregate with the component (B1) and water solubility. It is preferably 16 or less, more preferably 14 or less, and even more preferably 12 or less.

The component (A) preferably has an alkyl group having 8 or more carbon atoms and 20 or less carbon atoms.

From the viewpoint of water solubility, the degree of sugar condensation of the component (A) is 1 or more and 5 or less, preferably 4 or less, more preferably 3 or less, still more preferably 2 or less.

Specific examples of the sugar constituting the component (A) include glucose, maltose, and sucrose. The component (A) preferably has at least one (poly) glucoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less. At least one (poly) glucoside having an alkyl group having 8 or more carbon atoms and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less is preferable.

<(B1) component>
The component (B1) is a nonionic surfactant represented by the general formula (B11) [hereinafter referred to as a component (B11)] and a nonionic surfactant represented by the general formula (B12) [hereinafter referred to as a component (B12)]. , (B12) component] and the nonionic surfactant represented by the general formula (B13) [hereinafter referred to as (B13) component], at least one of the nonionic surfactants.

In the general formula (B11), R ¹¹ is preferably a group selected from an alkyl group having 8 or more and 22 or less carbon atoms and a substituted aryl group having 8 or more and 22 or less carbon atoms, and more preferably 8 or more and 22 or less carbon atoms. It is a group selected from the alkyl groups of. The number of carbon atoms of the alkyl group having 8 or more and 22 or less carbon atoms is preferably 12 or more, and preferably 20 or less. The substituted aryl group having 8 or more and 22 or less carbon atoms has preferably 14 or more carbon atoms and preferably 22 or less carbon atoms. Examples of the substituted aryl group include a substituted aryl group substituted with an aralkyl group having 8 or more and 16 or less carbon atoms such as a monobenzylphenyl group, a dibenzylphenyl group, a monostyrene phenyl group, and a distyreneated phenyl group, and an octylphenyl group. And phenyl groups substituted with alkyl groups having 8 or more and 12 or less carbon atoms, such as nonylphenyl groups.
In the general formula (B11), AO is an alkyleneoxy group having 2 or more and 4 or less carbon atoms. The AO preferably contains an alkyleneoxy group having 2 or 3 carbon atoms and further contains an alkyleneoxy group having 2 carbon atoms.
In the general formula (B11), p1 is the average number of moles of substance added of AO, preferably 2 or more, more preferably 3 or more, and preferably 50 or less from the viewpoint of the fluidity of the water-soluble and hydraulic composition. , More preferably 60 or less, still more preferably 45 or less, even more preferably 20 or less, still more preferably 4.5 or less.

In the general formula (B12), R ²¹ is preferably a group selected from alkyl groups having 7 or more and 21 or less carbon atoms. The number of carbon atoms of the alkyl group having 7 or more and 21 or less carbon atoms is preferably 9 or more, and preferably 18 or less.
In the general formula (B12), R ²² is preferably an alkylene group having 2 carbon atoms.
In the general formula (B12), among X ¹ , the alkyl group having 1 or more carbon atoms and 3 or less carbon atoms is preferably an alkyl group having 1 carbon atom. Further, as the group represented by —R ²² −OH, it is preferable that R ²² is an alkylene group having 2 carbon atoms. X ¹ is preferably an alkyl group having 1 or more carbon atoms and 3 or less carbon atoms.

In the general formula (B13), R ³¹ is preferably a group selected from alkyl groups having 8 or more carbon atoms and 22 or less carbon atoms. The number of carbon atoms of the alkyl group having 8 or more and 22 or less carbon atoms is preferably 9 or more, and preferably 18 or less.
In the general formula (B13), AO is an alkyleneoxy group having 2 or more and 4 or less carbon atoms. The AO preferably contains an alkyleneoxy group having 2 or 3 carbon atoms and further contains an alkyleneoxy group having 2 carbon atoms.
In the general formula (B13), q1 and r1 are numbers of 0 or more, respectively, and the total of q1 and r1 is preferably 1.0 or more, more preferably 1.5 or more, and preferably 6 or less. It is more preferably 4.5 or less, still more preferably 3.5 or less, still more preferably 3.0 or less, still more preferably 2.5 or less.

The component (B1) is preferably at least one selected from the components (B12) and (B13), and more preferably at least one selected from the component (B13), from the viewpoint of improving the fluidity of the hydraulic composition. It is a seed.

<Composition, optional ingredients, etc.>
In the dispersant composition for a water-hard composition of the present invention, the molar ratio of the component (A) to the component (B1) is (A) / (B1) from the viewpoint of improving the fluidity of the water-hard composition and suppressing the delay in curing. ), It is preferably 0.05 or more and 20.0 or less. The molar ratio of (A) / (B1) is more preferably 0.1 or more, still more preferably 0.2 or more, still more preferably 0.3 or more, and even more preferably 15 or less, still more preferably 10 or less. , More preferably 7.5 or less.
When the component (B1) is the component (B11), the molar ratio of (A) / (B1) is preferably 0.4 or more, more preferably 1 or more, still more preferably 2 or more, and from the same viewpoint. It is preferably 10 or less, more preferably 8 or less.
When the component (B1) is the component (B12), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.15 or more, still more preferably 0. It is 2 or more, preferably 0.5 or less, and more preferably 0.3 or less.
When the component (B1) is the component (B13), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.2 or more, and preferably 0 from the same viewpoint. It is 5.5 or less, more preferably 0.4 or less.

In the dispersant composition for a water-hard composition of the present invention, the mass ratio of the component (A) to the component (B1) is (A) / (B1) from the viewpoint of improving the fluidity of the water-hard composition and suppressing the delay in curing. ), More preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.15 or more, still more preferably 0.3 or more, still more preferably 0.5 or more, and preferably 4. It is 0 or less, more preferably 2.0 or less, still more preferably 1.0 or less, still more preferably 0.5 or less.

One of the indexes for suppressing the curing delay of the hydraulic composition is the start time of the hydration reaction evaluated in Examples described later. When the start time of the hydration reaction is short, the start of curing of the hydraulic composition such as concrete is accelerated, and the required strength can be obtained earlier, so that the demolding of the formwork can be accelerated, and the productivity of the hydraulic composition can be accelerated. It is possible to improve and shorten the construction period. That is, being able to suppress the curing delay of the hydraulic composition can, for example, shorten the time required for demolding and the curing time required to obtain a predetermined strength, leading to a shortening of the construction period. It is preferable to set the molar ratio of (A) / (B1) in the above range from such a viewpoint. In the range of the molar ratio, it becomes easy to form a pseudo-aggregate of the above-mentioned component (A) and the component (B1), and high dispersibility can be exhibited with a small adsorption amount. It is possible to reduce the amount of adsorption, and as a result, it is presumed that the curing delay is further suppressed.

In the dispersant composition for a water-hardening composition of the present invention, the component (A) is preferably 1% by mass or more, more preferably 5% by mass or more, still more preferably 10% by mass or more, and preferably 10% by mass or more in the solid content. Is contained in an amount of 70% by mass or less, more preferably 50% by mass or less, still more preferably 30% by mass or less. Regarding the dispersant composition for hydraulic composition, the solid content means a component other than water.

In the dispersant composition for a water-hardening composition of the present invention, the component (B1) is preferably 1% by mass or more, more preferably 5% by mass or more, still more preferably 10% by mass or more, and preferably 10% by mass or more in the solid content. Is contained in an amount of 70% by mass or less, more preferably 50% by mass or less, still more preferably 30% by mass or less.

The dispersant composition for a hydraulic composition of the present invention can further contain (C) an antifoaming agent [hereinafter referred to as (C) component]. However, the component (A) and the component (B1) are excluded from the component (C).

The component (C) includes a silicone-based defoaming agent, a fatty acid ester-based defoaming agent, an ether-based defoaming agent, a polyalkylene oxide-based defoaming agent, an alkylphosphate ester-based defoaming agent, and an acetylene glycol-based defoaming agent. One or more antifoaming agents selected from.
As the component (C), one or more defoaming agents selected from silicone-based defoaming agents, fatty acid ester-based defoaming agents, and ether-based defoaming agents are preferable.
The silicone-based defoaming agent is preferably dimethylpolysiloxane.
The fatty acid ester-based defoaming agent is preferably a water-insoluble polyalkylene glycol fatty acid ester.
The ether-based defoaming agent is preferably polyalkylene glycol alkyl ether.
The polyalkylene oxide-based defoaming agent is preferably a block copolymer of ethylene oxide and propylene oxide.
As the alkyl phosphate-based defoaming agent, tributyl phosphate, isotributyl phosphate, and sodium octyl phosphate are preferable.
As the acetylene glycol-based defoaming agent, 2,4,7,9-tetramethyl-5-decyne-4,7-diol or an alkylene oxide adduct thereof is preferable.

As the component (C), a fatty acid ester-based defoaming agent is preferable from the viewpoint of suppressing a decrease in strength.

The silicone-based defoaming agent is preferably an emulsified type that is compatible with water. Commercially available emulsified silicone defoamers that are compatible with water include KM-70, KM-73A [all Shin-Etsu Silicone Co., Ltd.], and TSA series (Momentive Performance Materials Japan GK). ), FS Antifoam Series [Toray Dow Corning Co., Ltd.], Antifoam E-20 [Kao Co., Ltd.] and the like.

Examples of commercially available products of polyalkylene glycol fatty acid ester, which is a fatty acid ester-based defoaming agent, include Leodor TW-L120 [Kao Corporation], Nicofix, Foamlex [all from Nikka Kagaku Co., Ltd.] and the like.

As a commercially available product of polyalkylene glycol alkyl ether, which is an ether-based defoaming agent, the defoaming agent No. 1. Antifoaming agent No. 5. Defoamer No. 8 [all Kao Corporation], SN Deformer 15-P, Four Master PC [all San Nopco Ltd.] and the like can be mentioned.

Among the polyalkylene oxide-based defoamers, examples of commercially available products of block copolymers of polyethylene oxide and polypropylene oxide include block copolymers of ethylene oxide and propylene oxide, for example, PLURONIC ™ products [BASF].

Examples of commercially available acetylene glycol-based defoaming agents include SURFYNOL ™ 400 series [Air Products and Chemicals] and the like.

When the dispersant composition for a water-hardening composition of the present invention contains the component (C), the content thereof is preferably 0.01% by mass or more, more preferably 0.1% by mass or more in the solid content. It is more preferably 1.0% by mass or more, preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less.

The dispersant composition for a water-hardening composition of the present invention is a conventional cement dispersant, a water-soluble polymer compound, an air entraining agent, a cement wetting agent, a swelling material, a waterproofing agent, a retarding agent, a quick-setting agent, and a thickener. , Aggregating agent, drying shrinkage reducing agent, strength enhancing agent, curing accelerator, preservative and the like [excluding those corresponding to the components (A) to (C)] can be contained.

The dispersant composition for a hydraulic composition of the present invention may be in either a liquid form or a solid form. When the dispersant composition for a hydraulic composition of the present invention is a liquid, it preferably contains water.

Dispersant for water-hard composition The content of water when the composition is a liquid containing water is preferably 10% by mass in the composition from the viewpoint of workability when preparing the water-hard composition. The above is more preferably 30% by mass or more, further preferably 50% by mass or more, and from the viewpoint of improving the fluidity of the water-hard composition, preferably 90% by mass or less, more preferably 70% by mass or less. be.

Dispersant for water-hard composition The content of the component (A) when the composition is a liquid containing water is preferably 1% by mass in the composition from the viewpoint of improving the fluidity of the water-hard composition. % Or more, more preferably 5% by mass or more, still more preferably 10% by mass or more, and preferably 70% by mass or less, more preferably 50% by mass or less, still more preferably 30% by mass or less.

Dispersant for water-hard composition The content of the component (B1) when the composition is a liquid containing water is preferably 1% by mass in the composition from the viewpoint of improving the fluidity of the water-hard composition. % Or more, more preferably 5% by mass or more, still more preferably 10% by mass or more, and preferably 70% by mass or less, more preferably 50% by mass or less, still more preferably 30% by mass or less.

Dispersant for water-hard composition The total content of the component (A) and the component (B1) when the composition is a liquid containing water is the composition from the viewpoint of improving the fluidity of the water-hard composition. In the product, preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 30% by mass or more, and preferably 90% by mass or less, more preferably 70% by mass or less, still more preferably 50% by mass or less. Is.

[Hydraulic heat inhibitor for hydraulic composition]
The details of the mechanism of exerting the effect of the hydration heat-generating inhibitor for the hydraulic composition of the present invention are unknown, but it is presumed as follows.
In general, since polyols such as sugar have the property of adsorbing to cement particles, it is presumed that the (poly) glycoside of the component (A) is adsorbed on the surface of cement particles. Further, since the nonionic surfactant of the component (B2) has a predetermined HLB, the lipophilicity is enhanced, and the nonionic surfactant of the component (B2) is coordinated with the alkyl group or the alkenyl group of the component (A) on the surface of the cement particles. It is presumed that an oil film is formed. It is considered that the oil film prevents the cement particles from coming into contact with water, thereby suppressing the heat generation of hydration of the cement.

<Ingredient (A)>
The component (A) is at least one (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less.

The carbon number of the alkyl group or alkenyl group of the component (A) is 8 or more, and 20 or less, preferably 18 or less, more preferably 16 or less, still more preferably, from the viewpoint of suppressing hydration heat generation of the hydraulic composition. It is 14 or less, more preferably 12 or less.

The component (A) preferably has an alkyl group having 8 or more carbon atoms and 20 or less carbon atoms.

The degree of sugar condensation of the component (A) is 1 or more and 5 or less, preferably 4 or less, more preferably 3 or less, still more preferably 2 or less, from the viewpoint of suppressing hydration heat generation of the hydraulic composition.

Specific examples of the sugar constituting the component (A) include glucose, maltose, and sucrose. The component (A) preferably has at least one (poly) glucoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less. At least one (poly) glucoside having an alkyl group having 8 or more carbon atoms and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less is preferable.

<(B2) component>
The component (B2) is a nonionic surfactant represented by the general formula (B21) [hereinafter referred to as a component (B21)] and a nonionic surfactant represented by the general formula (B22) [hereinafter referred to as a nonionic surfactant]. , (B22) component], the nonionic surfactant represented by the general formula (B23) [hereinafter referred to as (B23) component] and the nonionic surfactant represented by the general formula (B24). It is a nonionic surfactant selected from [hereinafter referred to as (B24) component], and is at least one of the nonionic surfactants having an HLB value of 2 or more and 11 or less.

The HLB of the component (B2) is 2 or more, preferably 5 or more, more preferably 6 or more, and 11 or less, preferably less than 11, more preferably 10 or less, from the viewpoint of suppressing hydration heat generation of the hydraulic composition. It is more preferably 9 or less, still more preferably 7 or less.
Here, HLB is an abbreviation for Hydrophilic Hydrophilic Balance, and is an index for knowing whether a compound is hydrophilic or lipophilic. For general nonionic surfactants, the value is 0 to 20. The smaller the HLB value, the stronger the lipophilicity.

In the present invention, the HLB of the component (B21), the component (B22), and the component (B23) is a value calculated by the Griffin method. The HLB by the Griffin method is calculated from the following formula.
HLB = 20 × total / molecular weight of the formula of the hydrophilic part In the present invention, the HLB of the component (B24) is a value calculated by the atlas method. The HLB by the atlas method is calculated from the following formula.
HLB = 20 × (1-S / A)
S: Saponification value of the ester as the component (B24) A: Neutralization value of the fatty acid in the ester as the component (B24)

When two or more nonionic surfactants are used, the HLB of the mixture mixed with the composition may be within the predetermined range.
When two or more types of nonionic surfactants are used, HLB is calculated as a weighted average value of the HLB of each nonionic surfactant and the weight ratio.

In the general formula (B21), R ^11b is preferably a group selected from an alkyl group having 8 or more and 22 or less carbon atoms and a substituted aryl group having 8 or more and 22 or less carbon atoms, and more preferably 8 or more and 22 or less carbon atoms. It is a group selected from the alkyl groups of. The number of carbon atoms of the alkyl group having 8 or more and 22 or less carbon atoms is preferably 9 or more, and preferably 18 or less. The substituted aryl group having 8 or more and 22 or less carbon atoms has preferably 14 or more carbon atoms and preferably 18 or less carbon atoms. Examples of the substituted aryl group include an octylphenyl group and a phenyl group substituted with an alkyl group having 8 to 12 carbon atoms such as a nonylphenyl group.
In the general formula (B21), AO is an alkyleneoxy group having 2 or more and 4 or less carbon atoms. The AO preferably contains an alkyleneoxy group having 2 or 3 carbon atoms and further contains an alkyleneoxy group having 2 carbon atoms.
In the general formula (B21), p2 is the average number of moles of substance added of AO, preferably 1.0 or more, more preferably 1.5 or more, and preferably from the viewpoint of suppressing hydration heat generation of the water-hard composition. Is 10 or less, more preferably 6 or less, still more preferably 4.5 or less, still more preferably 3.5 or less, still more preferably 2.5 or less.

In the general formula (B22), R ^21b is preferably a group selected from alkyl groups having 7 or more and 21 or less carbon atoms. The number of carbon atoms of the alkyl group having 7 or more and 21 or less carbon atoms is preferably 9 or more, and preferably 18 or less.
In the general formula (B22), R ^22b is preferably an alkylene group having 2 carbon atoms.
^In the general formula (B22), among X2, the alkyl group having 1 or more carbon atoms and 3 or less carbon atoms is preferably an alkyl group having 1 carbon atom. The group represented by —R ^22b −OH is preferably an alkylene group having 2 carbon atoms in R ^22b . X ² is preferably an alkyl group having 1 or more carbon atoms and 3 or less carbon atoms.

In the general formula (B23), R ^31b is preferably a group selected from alkyl groups having 8 or more carbon atoms and 22 or less carbon atoms. The number of carbon atoms of the alkyl group having 8 or more and 22 or less carbon atoms is preferably 9 or more, and preferably 18 or less.
In the general formula (B23), AO is an alkyleneoxy group having 2 or more and 4 or less carbon atoms. The AO preferably contains an alkyleneoxy group having 2 or 3 carbon atoms and further contains an alkyleneoxy group having 2 carbon atoms.
In the general formula (B23), q2 and r2 are numbers of 0 or more, respectively, and the total of q2 and r2 is preferably 1.0 or more, more preferably 1.5 or more, and preferably 6 or less. It is more preferably 4.5 or less, still more preferably 3.5 or less, and even more preferably 2.5 or less.

In the general formula (B24), R ^41b is preferably a group selected from alkyl groups having 7 or more and 21 or less carbon atoms. The number of carbon atoms of the alkyl group having 7 or more and 21 or less carbon atoms is preferably 9 or more, and preferably 17 or less.
In the general formula (B24), AO is an alkyleneoxy group having 2 or more and 4 or less carbon atoms. The AO preferably contains an alkyleneoxy group having 2 or 3 carbon atoms and further contains an alkyleneoxy group having 2 carbon atoms.
In the general formula (B24), p2 is the average number of moles of AO added, and is preferably 1 or more, more preferably 3 or more, and preferably 10 or less, from the viewpoint of suppressing hydration heat generation of the water-hard composition. More preferably, it is 6 or less.

The component (B2) is preferably at least one selected from the components (B21) and (B23), and more preferably at least one selected from the component (B23).

<Composition, optional ingredients, etc.>
The hydration heat generation inhibitor for a water-hard composition of the present invention has a molar ratio of the component (A) to the component (B2) of (A) / (B2) from the viewpoint of suppressing the heat generation of hydration of the water-hard composition. It is preferably 0.10 or more, more preferably 0.20 or more, still more preferably 0.25 or more, and preferably 10.0 or less, more preferably 3.0 or less, still more preferably 2.0 or less, still more. It is preferably 1.0 or less, more preferably 0.50 or less, still more preferably 0.40 or less, still more preferably 0.35 or less, still more preferably 0.30 or less.

The hydration heat generation inhibitor for a water-hard composition of the present invention has a mass ratio of the component (A) to the component (B2) of (A) / (B2) from the viewpoint of suppressing the heat generation of hydration of the water-hard composition. It is preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.15 or more, still more preferably 0.3 or more, still more preferably 0.5 or more, and preferably 4.0 or less. It is more preferably 2.0 or less, still more preferably 1.0 or less, and even more preferably 0.5 or less.

In the water-hardening composition inhibitor of the present invention, the component (A) is preferably 1% by mass or more, more preferably 5% by mass or more, still more preferably 10% by mass or more, and preferably 10% by mass or more in the solid content. Is contained in an amount of 70% by mass or less, more preferably 50% by mass or less, still more preferably 30% by mass or less. Regarding the hydration heat suppressant for hydraulic composition, the solid content means a component other than water.

In the water-hardening composition inhibitor of the present invention, the component (B2) is preferably 5% by mass or more, more preferably 15% by mass or more, still more preferably 30% by mass or more, and preferably 30% by mass or more in the solid content. Is contained in an amount of 90% by mass or less, more preferably 75% by mass or less, still more preferably 60% by mass or less.

The hydration heat suppressant for a hydraulic composition of the present invention can further contain a defoaming agent of the component (C). However, the component (A) and the component (B2) are excluded from the component (C). Specific examples and preferred embodiments of the component (C) are the same as those described in the dispersant composition for hydraulic composition of the present invention. When the hydration heat suppressant for a water-hardening composition of the present invention contains the component (C), the content thereof is preferably 0.01% by mass or more, more preferably 0.1% by mass or more in the solid content. It is more preferably 1.0% by mass or more, preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less.

The hydration heat suppressant for a hydraulic composition of the present invention may further contain other components. Examples thereof include AE agents, retarding agents, foaming agents, thickeners, foaming agents, waterproofing agents, fluidizing agents, fast-strengthening agents, solubilizing agents, compatibilizers and the like.
Normally, a nonionic surfactant having an HLB of 2 or more and 11 or less, such as the component (B2), is insoluble in water. preferable. Examples of the solubilizer include hydrophilic organic solvents such as methanol, ethanol, propanol, ethylene glycol, propylene glycol, neopentyl glycol, diethylene glycol, glycerin, butyl glycol, butyl diglycol, butyl triglycol, and benzyl alcohol. One or more of the above can be used. The solvent is preferably ethylene glycol, propylene glycol, glycerin, and more preferably propylene glycol from the viewpoint of flammability and compatibility.

The hydration heat-generating inhibitor for a hydraulic composition of the present invention can be, for example, a one-dose type composition containing a component (A) and a component (B2). In this case, (C) defoaming agent can be further contained. Further, water can be further contained. Further, the component (A) and the component (B2) may be added to the hydraulic composition separately.

[Hydraulic composition]
The present invention is a hydraulic composition containing a hydraulic powder, water, a component (A), and a component (B1).
The total content of the component (A) and the component (B1) is 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the hydraulic powder.
A hydraulic composition is provided.
Specific examples and preferred embodiments of the component (A) and the component (B1) in the water-hardening composition of the present invention are the same as those of the dispersant composition for the water-hardening composition of the present invention.

The hydraulic powder used in the hydraulic composition of the present invention containing the component (B1) is a powder having a physical property that is cured by a hydration reaction, and examples thereof include cement and gypsum. Preferably, it is a cement such as ordinary Portoland cement, belite cement, moderate heat cement, early-strength cement, ultra-fast-strength cement, sulfate-resistant cement, and has a posolan action such as blast furnace slag, fly ash, silica fume and / or Powder having latent water hardness, blast furnace slag cement to which stone powder (calcium carbonate powder) or the like is added, fly ash cement, silica fume cement or the like may be used. Here, the water-hard powder is selected from powder having a physical property of hardening by a hydration reaction such as cement, powder having a pozzolanic action, powder having latent water-hardness, and stone powder (calcium carbonate powder). In the present invention, when the powder is contained, the amount thereof is also included in the amount of the water-hard powder. When the powder having physical properties that are cured by the hydration reaction contains a high-strength admixture, the amount of the high-strength admixture is also included in the amount of the water-hard powder. This also applies to the mass part and the mass ratio related to the mass of the hydraulic powder.

The water-hard powder used in the water-hard composition of the present invention containing the component (B1) has a gypsum content of preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass. % Or less, more preferably 5% by mass or less. Gypsum is selected from anhydrous gypsum, semi-hydrated gypsum, and dihydrate gypsum.
The more preferable hydraulic powder used in the hydraulic composition of the present invention containing the component (B1) has a gypsum content of preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably. It is a cement of 10% by mass or less, more preferably 5% by mass or less. This cement may contain the powder having the above-mentioned posolane action and / or latent hydraulic hardness, stone powder (calcium carbonate powder) and the like.

The water-hard composition of the present invention containing the component (B1) is abbreviated as water / water-hard powder ratio [mass percentage (% by mass) of water and water-hard powder in the slurry, usually W / P. , When the powder is cement, it is abbreviated as W / C. ], From the viewpoint that fluidity can be exhibited even with a small amount of water, it is preferably 15% by mass or more, more preferably 20% by mass or more, and preferably 50% by mass or less, more preferably 45% by mass or less. be.

The water-hard composition of the present invention containing the component (B1) has a total content of the component (A) and the component (B1) of 0.05 parts by mass or more, preferably 0.05 parts by mass or more, based on 100 parts by mass of the water-hard powder. 0.1 part by mass or more, more preferably 0.15 part by mass or more, further preferably 0.5 part by mass or more, and 4.0 parts by mass or less, preferably 4.0 parts by mass or less from the viewpoint of setting delay of the water-hard composition. It is 2.0 parts by mass or less, more preferably 1.0 part by mass or less.

In the hydraulic composition of the present invention containing the component (B1), the molar ratio of the component (A) to the component (B1) is (A) / (B1), preferably 0.05 or more and 20.0 or less. be. The molar ratio of (A) / (B1) is more preferably 0.1 or more, still more preferably 0.2 or more, still more preferably 0.3 or more, and even more preferably 15 or less, still more preferably 10 or less. , More preferably 7.5 or less.
When the component (B1) is the component (B11), the molar ratio of (A) / (B1) is preferably 0.4 or more, more preferably 1 or more, still more preferably 3 or more, and preferably 10 or less. , More preferably 8 or less.
When the component (B1) is the component (B12), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.15 or more, still more preferably 0.2 or more, and. It is preferably 0.5 or less, more preferably 0.3 or less.
When the component (B1) is the component (B13), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.2 or more, and preferably 0.5 or less. It is preferably 0.4 or less.

In the water-hardening composition of the present invention containing the component (B1), the mass ratio of the component (A) to the component (B1) is (A) / from the viewpoint of improving the fluidity of the water-hardening composition and suppressing the curing delay. In (B1), preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.15 or more, still more preferably 0.3 or more, still more preferably 0.5 or more, and preferably. It is 4.0 or less, more preferably 2.0 or less, still more preferably 1.0 or less, still more preferably 0.5 or less.

In the water-hard composition of the present invention containing the component (B1), the content of the component (A) is preferably 0.01 part by mass or more, more preferably 0, with respect to 100 parts by mass of the water-hard powder. 05 parts by mass or more, more preferably 0.15 parts by mass or more, and from the viewpoint of suppressing setting delay, preferably 1.0 part by mass or less, more preferably 0.5 parts by mass or less, still more preferably 0.3 parts by mass. It is less than a part.
Further, the content of the component (B1) is preferably 0.05 parts by mass or more, more preferably 0.15 parts by mass or more, still more preferably 0.3 parts by mass or more with respect to 100 parts by mass of the water-hard powder. And, preferably 1.0 part by mass or less, more preferably 0.6 part by mass or less, still more preferably 0.4 part by mass or less.

The hydraulic composition of the present invention containing the component (B1) can further contain the defoaming agent of the component (C). Specific examples and preferred embodiments of the defoaming agent are the same as those described in the dispersant composition for hydraulic composition of the present invention. When the component (C) is used, the water-hard composition of the present invention contains the component (C) in an amount of preferably 0.00005 parts by mass or more, more preferably 0.00025 parts by mass, based on 100 parts by mass of the water-hard powder. The content is more than parts, more preferably 0.0005 parts by mass or more, and preferably 0.1 parts by mass or less, more preferably 0.075 parts by mass or less, still more preferably 0.05 parts by mass or less.

The hydraulic composition of the present invention containing the component (B1) can further contain the (D) dispersant [hereinafter referred to as the component (D)]. Examples of the dispersant include one or more dispersants selected from a lignin sulfonic acid-based polymer, a polycarboxylic acid-based polymer, a naphthalene-based polymer, a melamine-based polymer, and a phenol-based polymer, and from the viewpoint of dispersibility. Therefore, it is preferably one or more dispersants selected from polycarboxylic acid-based copolymers, lignin sulfonic acid-based copolymers, and naphthalene sulfonic acid-based copolymers, and more preferably lignin sulfonic acid-based polymers. And one or more dispersants selected from polycarboxylic acid-based polymers.

The naphthalene-based polymer is a naphthalene sulfonic acid formaldehyde condensate (Mighty 150 manufactured by Kao Co., Ltd., etc.), and the melamine-based polymer is a melamine sulfonate formaldehyde condensate (for example, Mighty 150-V2 manufactured by Kao Co., Ltd.), phenol-based. The polymer is a phenol sulfonic acid formaldehyde condensate (compounds described in JP-A-49-104919), and the lignin sulfonic acid-based polymer is lignin sulfonate (Posolis No. 70 manufactured by BASF, Boregard). Ultragin NA manufactured by Nippon Paper Chemical Co., Ltd., Sun Extract, Vanillex, Pearl Rex, etc.) can be used.

As the polycarboxylic acid-based copolymer, a copolymer of a monoester of polyalkylene glycol and (meth) acrylic acid and a carboxylic acid such as (meth) acrylic acid (for example, JP-A-8-12397). Compounds, etc.), copolymers of unsaturated alcohols with polyalkylene glycol and carboxylic acids such as (meth) acrylic acid, copolymers of unsaturated alcohols with polyalkylene glycol and dicarboxylic acids such as maleic acid, etc. Can be used. Here, (meth) acrylic acid means a carboxylic acid selected from acrylic acid and methacrylic acid.

When the water-hard composition of the present invention containing the component (B1) contains the component (D), the content of the component (D) is 100 parts by mass of the water-hard powder from the viewpoint of workability. It is preferably 0.01 part by mass or more, more preferably 0.05 part by mass or more, and preferably 2 parts by mass or less, more preferably 1 part by mass or less.

The hydraulic composition of the present invention containing the component (B1) preferably contains an aggregate. Examples of the aggregate include aggregates selected from fine aggregates and coarse aggregates. Examples of the fine aggregate include those specified by No. 2311 in JIS A0203-2014. Fine aggregates include river sand, land sand, mountain sand, sea sand, lime sand, silica sand and their crushed sand, blast furnace slag fine aggregate, ferronickel slag fine aggregate, lightweight fine aggregate (artificial and natural) and recycled. Examples include fine aggregates. In addition, examples of the coarse aggregate include those specified by No. 2312 in JIS A0203-2014. For example, coarse aggregates include river gravel, land gravel, mountain gravel, sea gravel, lime gravel, crushed stones of these, blast furnace slag coarse aggregate, ferronickel slag coarse aggregate, lightweight coarse aggregate (artificial and natural) and recycled. Coarse aggregate and the like can be mentioned. As the fine aggregate and the coarse aggregate, different types may be mixed and used, or a single type may be used.

When the hydraulic composition containing the component (B1) is concrete, the amount of coarse aggregate used reduces the development of the strength of the hydraulic composition and the amount of hydraulic powder such as cement, and forms, etc. From the viewpoint of improving the filling property into, the bulk volume is preferably 50% or more, more preferably 55% or more, further preferably 60% or more, and preferably 100% or less, more preferably 90% or less. More preferably, it is 80% or less. The bulk volume is the ratio of the volume (including voids) of the coarse aggregate in 1 m ³ of concrete.
When the hydraulic composition containing the component (B1) is concrete, the amount of the fine aggregate used is preferably 500 kg / m ³ or more, more preferably 500 kg / m 3 or more, from the viewpoint of improving the filling property into the formwork or the like. It is 600 kg / m ³ or more, more preferably 700 kg / m ³ or more, and preferably 1000 kg / m ³ or less, more preferably 900 kg / m ³ or less.
When the water-hard composition containing the component (B1) is a mortar, the amount of the fine aggregate used is preferably 800 kg / m ³ or more, more preferably 900 kg / m ³ or more, still more preferably 1000 kg / m ³ or more. Yes, and preferably 2000 kg / m ³ or less, more preferably 1800 kg / m ³ or less, still more preferably 1700 kg / m ³ or less.

Examples of the hydraulic composition containing the component (B1) include concrete and the like. Of these, concrete using cement is preferable. The hydraulic composition of the present invention is for self-leveling, refractory, plaster, lightweight or heavy concrete, AE, repair, prepacked, traymy, ground improvement, grout, cold weather, etc. It is also useful in the field of.

The hydraulic composition of the present invention containing the component (B1) may further contain other components. For example, an AE agent, a retarding agent, a foaming agent, a thickener, a foaming agent, a waterproofing agent, a fluidizing agent and the like can be mentioned.

The present invention is a water-hardening composition containing a water-hardening powder, water, a component (A), and a component (B2), wherein the total content of the component (A) and the component (B2) is. Provided is a water-hard composition having 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the water-hard powder.
Specific examples and preferred embodiments of the component (A) and the component (B2) in the water-hardening composition of the present invention containing the component (B2) are the same as those of the hydration heat-generating inhibitor for the water-hardening composition of the present invention. Further, it is preferable that the molar ratio of (A) / (B2) is also in the same range as the hydration heat-generating inhibitor for the hydraulic composition of the present invention. Further, it is preferable that the mass ratio of (A) / (B2) is also in the same range as the hydration heat generation inhibitor for the water-hard composition of the present invention.

The hydraulic powder is a powder having physical properties that hardens by a hydration reaction, and examples thereof include cement and gypsum.
Examples of cement include ordinary Portland cement, early-strength Portland cement, ultra-early-strength Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, white Portland cement, and eco-cement (for example, JIS R5214). Among these, cement selected from ordinary Portland cement, sulfuric acid resistant Portland cement and white Portland cement is preferable, and ordinary Portland cement is more preferable.

Further, the water-hard powder such as cement may contain powder having pozzolanic action and / or latent water-hardness such as blast furnace slag, fly ash, and silica fume, stone powder (calcium carbonate powder), and the like. For example, blast furnace slag cement, fly ash cement, silica fume cement and the like may be used.

The water-hard powder used in the water-hard composition of the present invention containing the component (B2) has a gypsum content of preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass. % Or less, more preferably 5% by mass or less.
The more preferable hydraulic powder used in the hydraulic composition of the present invention containing the component (B2) has a gypsum content of preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably. It is a cement of 10% by mass or less, more preferably 5% by mass or less. This cement may contain the powder having the above-mentioned posolane action and / or latent hydraulic hardness, stone powder (calcium carbonate powder) and the like.

The water-hard composition of the present invention containing the component (B2) has a total content of the component (A) and the component (B2) of 0.05 parts by mass or more, preferably 0.05 parts by mass or more, based on 100 parts by mass of the water-hard powder. 0.1 part by mass or more, more preferably 0.15 part by mass or more, further preferably 0.5 part by mass or more, and from the viewpoint of hydration reaction delay, 4.0 parts by mass or less, preferably 2.0 parts by mass. It is less than a part by mass, more preferably 1.0 part by mass or less. Here, the water-hard powder is selected from powder having a physical property of hardening by a hydration reaction such as cement, powder having a pozzolanic action, powder having latent water-hardness, and stone powder (calcium carbonate powder). In the present invention, when the powder is contained, the amount thereof is also included in the amount of the water-hard powder. When the powder having physical properties that are cured by the hydration reaction contains a high-strength admixture, the amount of the high-strength admixture is also included in the amount of the water-hard powder. This also applies to other mass parts and mass ratios related to the mass of the hydraulic powder.

Further, in the water-hard composition of the present invention containing the component (B2), the content of the component (A) is preferably 0.01 part by mass or more, more preferably 0.01 part by mass with respect to 100 parts by mass of the water-hard powder. 0.05 parts by mass or more, more preferably 0.15 parts by mass or more, and from the viewpoint of delaying the hydration reaction, preferably 1.0 part by mass or less, more preferably 0.5 parts by mass or less, still more preferably. It is 0.3 parts by mass or less.
Further, in the water-hard composition of the present invention containing the component (B2), the content of the component (B2) is preferably 0.1 part by mass or more, more preferably 0.1 part by mass with respect to 100 parts by mass of the water-hard powder. It is 0.2 parts by mass or more, more preferably 0.3 parts by mass or more, preferably 2.0 parts by mass or less, more preferably 1.0 part by mass or less, still more preferably 0.6 parts by mass or less.

The water-hard composition of the present invention containing the component (B2) has a water / water-hard powder ratio [mass ratio of water to water-hard powder in the slurry (mass of water / mass /) from the viewpoint of workability and economy. Mass of water-hard powder x 100), usually abbreviated as W / P. ], Is preferably 20% or more, more preferably 30% or more, further preferably 40% or more, and preferably 100% or less, more preferably 80% or less, still more preferably 70% or less.

The water-hard composition of the present invention containing the component (B2) has a water / cement ratio [mass ratio of water to cement in slurry (mass of water / mass of cement × 100)) from the viewpoint of workability and economy. , Usually abbreviated as W / C. ], Is preferably 20% or more, more preferably 30% or more, further preferably 40% or more, and preferably 100% or less, more preferably 80% or less, still more preferably 70% or less.

The hydraulic composition of the present invention containing the component (B2) can further contain an aggregate. Examples of the aggregate include fine aggregate and coarse aggregate. The fine aggregate is preferably mountain sand, land sand, river sand and crushed sand, and the coarse aggregate is preferably mountain gravel, land gravel, river gravel and crushed stone. Depending on the application, lightweight aggregate may be used. The term for aggregate is based on "Concrete Overview" (published by Technical Shoin on June 10, 1998).

The aggregate can be used in the usual range used for the preparation of concrete, mortar and the like. When the hydraulic composition is concrete, the amount of coarse aggregate used is preferably 50% or more, more preferably 55% or more, further preferably 60% or more, and 100% from the viewpoint of the properties of concrete. The following is preferable, 90% or less is more preferable, and 80% or less is further preferable. When the hydraulic composition is concrete, the amount of fine aggregate used is preferably 500 kg / m ³ or more, more preferably 600 kg / m ³ or more, and 700 kg from the viewpoint of improving the filling property into a formwork or the like. / M ³ or more is more preferable, 1000 kg / m ³ or less is preferable, and 900 kg / m ³ or less is more preferable. When the hydraulic composition is mortar, the amount of fine aggregate used is preferably 800 kg / m ³ or more, more preferably 900 kg / m ³ or more, further preferably 1000 kg / m ³ or more, and 2000 kg / m ³ or less. Is preferable, and 1800 kg / m ³ or less is more preferable, and 1700 kg / m ³ or less is further preferable.

The hydraulic composition of the present invention containing the component (B2) can further contain the defoaming agent of the component (C). Specific examples and preferred embodiments of the component (C) are the same as those of the hydration heat suppressant for hydraulic composition of the present invention. When the water-hard composition of the present invention contains the component (C), the content of the component (C) is preferably 0.01 part by mass with respect to 100 parts by mass of the water-hard powder from the viewpoint of workability. The above is more preferably 0.05 parts by mass or more, preferably 2 parts by mass or less, and more preferably 1 part by mass or less.

The hydraulic composition of the present invention containing the component (B2) can further contain the (D) dispersant [hereinafter referred to as the component (D)]. Specific examples and preferred embodiments of the component (D) are the same as the hydraulic composition of the present invention containing the component (B1). When the water-hard composition of the present invention containing the component (B2) contains the component (D), the content of the component (D) is 100 parts by mass of the water-hard powder from the viewpoint of workability. It is preferably 0.01 part by mass or more, more preferably 0.05 part by mass or more, and preferably 2 parts by mass or less, more preferably 1 part by mass or less.

The hydraulic composition of the present invention containing the component (B2) may further contain other components in addition to the above components. For example, an AE agent, a retarding agent, a foaming agent, a thickener, a foaming agent, a waterproofing agent, a fluidizing agent, an early strengthening agent and the like can be mentioned. As the early strengthening agent, an alkali metal, an alkaline earth metal hydrochloride, a sulfate, a nitrate, a nitrite, a cyanate, a thiocitrate, a thiosulfate, a compound selected from a formate, or an alkanolamine or a glycerin derivative. , Organic compounds selected from formaldehyde derivatives and catechol derivatives, nanoparticles of hydrated products of Portoland cement (CSH, and calcium hydroxide).

The hydraulic composition of the present invention containing the component (B2) may be concrete or mortar. The hydraulic composition of the present invention is for self-leveling, refractory, plaster, lightweight or heavy concrete, AE, repair, prepacked, traymy, ground improvement, grout, cold weather, etc. It is also useful in the field of.

[Method for producing hydraulic composition]
The present invention is a method for producing a hydraulic composition, which comprises mixing a hydraulic powder, water, a component (A), and a component (B1).
The total content of the component (A) and the component (B1) is 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the hydraulic powder. Mix to be,
A method for producing a hydraulic composition is provided.
In the method for producing a water-hard composition of the present invention using the component (B1), specific examples and preferred embodiments of the component (A) and the component (B1) are the same as those of the dispersant composition for a water-hard composition of the present invention. be. Further, specific examples and preferred embodiments of the hydraulic powder are the same as those of the hydraulic composition of the present invention using the component (B1).
The matters described in the dispersant composition for a water-hardening composition of the present invention and the water-hardening composition using the component (B1) shall be appropriately applied to the method for producing a water-hardening composition of the present invention using the component (B1). Can be done. In that case, the content of each component in the dispersant composition for a hydraulic composition or the hydraulic composition using the component (B1) can be read as a mixed amount and applied.

In the method for producing a water-hardening composition of the present invention using the component (B1), the total content of the component (A) and the component (B1), and the total content of the component (A) and the component (B1) is 100. 0.05 parts by mass or more, preferably 0.1 parts by mass or more, more preferably 0.15 parts by mass or more, still more preferably 0.5 parts by mass or more, and a delay in setting of the water-hard composition with respect to parts by mass. From the viewpoint of suppression, the mixture is mixed so as to be 4.0 parts by mass or less, preferably 2.0 parts by mass or less, and more preferably 1.0 part by mass or less.

Further, in the method for producing a hydraulic composition of the present invention using the component (B1), the component (A) and the component (B1) are the molar ratio of the component (A) and the component (B1) (A) /. (B1) is preferably mixed so as to be 0.05 or more and 20.0 or less. The molar ratio of (A) / (B1) is more preferably 0.1 or more, still more preferably 0.2 or more, still more preferably 0.3 or more, and even more preferably 15 or less, still more preferably 10 or less. , More preferably 7.5 or less.
When the component (B1) is the component (B11), the molar ratio of (A) / (B1) is preferably 0.4 or more, more preferably 1 or more, still more preferably 3 or more, and preferably 10 or less. , More preferably 8 or less.
When the component (B1) is the component (B12), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.15 or more, still more preferably 0.2 or more, and. It is preferably 0.5 or less, more preferably 0.3 or less.
When the component (B1) is the component (B13), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.2 or more, and preferably 0.5 or less. It is preferably 0.4 or less.

In the method for producing a water-hard composition using the component (B1) of the present invention, the component (A) and the component (B1) are used as the component (A) from the viewpoint of improving the fluidity of the water-hard composition and suppressing the delay in curing. (A) / (B1), which is the mass ratio of the components (B1) and (B1), is preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.15 or more, still more preferably 0.3 or more. , More preferably 0.5 or more, and preferably 4.0 or less, more preferably 2.0 or less, still more preferably 1.0 or less, still more preferably 0.5 or less.

In the present invention, the component (A) and the component (B1) may be separately mixed with the hydraulic powder to produce a hydraulic composition, but the component (A) and the component (B1) are mixed in advance. Then, it is preferable to mix it with the hydraulic powder. In the production of the hydraulic composition, it is more preferable to use the dispersant composition for the hydraulic composition of the present invention using the component (B1).

Further, the water-hard powder, water, the component (A), the component (B1), and the component (C) are mixed, and the water-hard powder, water, the component (A), and (B1) are mixed. A water-hard composition containing the component (C) and the component (C) can also be produced.
Further, the water-hard powder, water, the component (A), the component (B1), and the component (D) are mixed, and the water-hard powder, water, the component (A), and (B1) are mixed. A water-hard composition containing the component (D) and the component (D) can also be produced.
Further, the water-hard powder, water, the component (A), the component (B1), the component (C), and the component (D) are mixed, and the water-hard powder, water, and (A) are mixed. A water-hard composition containing the component (B1), the component (C), and the component (D) can also be produced.
Specific examples and preferred embodiments of the component (C) and the component (D) are the same as those described in the dispersant composition for a hydraulic composition of the present invention, respectively.

In the method for producing a hydraulic composition of the present invention using the component (B1), the component (A) and the component (B1) are mixed with a hydraulic powder such as cement smoothly. B1) It is preferable to mix the component and water in advance and mix with the hydraulic powder. The dispersant composition for a hydraulic composition of the present invention containing water can be used.

Further, in the method for producing a hydraulic composition of the present invention using the component (B1), a method of mixing a hydraulic powder such as cement with a dispersant composition for a hydraulic composition of the present invention is preferable. The dispersant composition for a hydraulic composition of the present invention may be a powder or a liquid. In the dispersant composition for a water-hardening composition of the present invention, the component (A), the component (B1), the component (C), and the component (D) are added to the water-hard powder in the above-mentioned amounts. It is preferable that the mixture is added so as to become.

The hydraulic powder, water, the component (A), and the component (B1) can be mixed by using a mixer such as a mortar mixer or a forced twin-screw mixer. Further, the mixture is preferably mixed for 1 minute or longer, more preferably 2 minutes or longer, and preferably 5 minutes or shorter, more preferably 3 minutes or shorter. In preparing the hydraulic composition, the materials and agents described in the hydraulic composition of the present invention using the component (B1) and their amounts can be used.

The obtained hydraulic composition is further filled with a hydraulic composition in a mold, cured and cured. Examples of the formwork include formwork for buildings, formwork for concrete products, and the like. Examples of the filling method into the mold include a method of directly charging from a mixer, a method of pumping a hydraulic composition with a pump, and a method of introducing the hydraulic composition into the mold.

When curing the hydraulic composition, it may be heat-cured to promote curing to promote curing. Here, the heat curing can promote the curing by holding the hydraulic composition at a temperature of 40 ° C. or higher and 80 ° C. or lower.

The present invention is also a method for producing a water-hard composition in which a water-hard powder, water, a component (A), and a component (B2) are mixed, and the component (A) and the component (B2) are used. Provided is a method for producing a water-hard composition, in which, in total, 0.05 parts by mass or more and 4.0 parts by mass or less are mixed with 100 parts by mass of the water-hard powder. In this production method, the matters described in the method for suppressing heat generation by hydration for a hydraulic composition of the present invention, the hydraulic composition containing the component (B2), and the method for suppressing heat generation by hydration of the following hydraulic composition are appropriately used. Can be applied. In addition, the matters described in the method for producing a hydraulic composition of the present invention containing the component (B2) can be appropriately applied to this production method.

[Method for improving liquidity]

In the present invention, the component (A) and the component (B1) are added to a water-hard composition containing water and a water-hard powder, and the component (A) and (B1) are added to 100 parts by mass of the water-hard powder. ) Provided is a method for improving the fluidity of a water-hard composition, which comprises 0.05 parts by mass or more and 4.0 parts by mass or less as the total amount of the components.
In the method for improving fluidity of the present invention, specific examples and preferred embodiments of the component (A) and the component (B1) are the same as those of the dispersant composition for a hydraulic composition of the present invention. Further, specific examples and preferred embodiments of the hydraulic powder are the same as those of the hydraulic composition of the present invention containing the component (B1).
The matters described in the dispersant composition for a water-hardening composition of the present invention and the water-hardening composition containing the component (B1) can be appropriately applied to the method for improving fluidity of the present invention. In that case, the content of each component in the dispersant composition for a hydraulic composition or the hydraulic composition containing the component (B1) can be read as a mixed amount and applied. Further, specific examples and preferred embodiments of the hydraulic composition in the method for improving fluidity of the present invention are the same as those of the hydraulic composition of the present invention containing the component (B1). The hydraulic composition of the present invention containing the component (B1) can be targeted.

In the method for improving the fluidity of the present invention, the total content of the component (A) and the component (B1) and the component (A) and the component (B1) is 0.05 with respect to 100 parts by mass of the water-hard powder. By mass or more, preferably 0.1 parts by mass or more, more preferably 0.15 parts by mass or more, still more preferably 0.5 parts by mass or more, and 4.0 from the viewpoint of the setting retardability of the water-hard composition. It is contained in the water-hardening composition in an amount of 7 parts by mass or less, preferably 2.0 parts by mass or less, more preferably 1.0 part by mass or less.

Further, in the method for improving the fluidity of the present invention, (A) / (B1), which is the molar ratio of the component (A) and the component (B1) to the component (A) and the component (B1), is preferably 0. Mix so as to be 0.05 or more and 20.0 or less. The molar ratio of (A) / (B1) is more preferably 0.1 or more, still more preferably 0.2 or more, still more preferably 0.3 or more, and even more preferably 15 or less, still more preferably 10 or less. , More preferably 7.5 or less.
When the component (B1) is the component (B11), the molar ratio of (A) / (B1) is preferably 0.4 or more, more preferably 1 or more, still more preferably 3 or more, and preferably 10 or less. , More preferably 8 or less.
When the component (B1) is the component (B12), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.15 or more, still more preferably 0.2 or more, and. It is preferably 0.5 or less, more preferably 0.3 or less.
When the component (B1) is the component (B13), the molar ratio of (A) / (B1) is preferably 0.1 or more, more preferably 0.2 or more, and preferably 0.5 or less. It is preferably 0.4 or less.

Further, in the method for improving the fluidity of the present invention, from the viewpoint of improving the fluidity of the water-hard composition and suppressing the curing delay, the component (A) and the component (B1) are separated from the component (A) and the component (B1). The mass ratio (A) / (B1) is preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.15 or more, still more preferably 0.3 or more, still more preferably 0. Mix so as to be 5.5 or more, preferably 4.0 or less, more preferably 2.0 or less, still more preferably 1.0 or less, still more preferably 0.5 or less.

As an example of the present invention, when a hydraulic powder and water are mixed to prepare a hydraulic composition, the component (A) and the component (B1) are added so as to have the predetermined parts by mass. Examples thereof include a method for improving the fluidity of the hydraulic composition.

[Method for suppressing hydration heat generation]
In the method for suppressing hydration heat generation of a hydraulic composition of the present invention, a component (A) and a component (B2) are added to a hydraulic composition containing water and a hydraulic powder in an amount of 100 parts by mass of the hydraulic powder. On the other hand, the total amount of the component (A) and the component (B2) is 0.05 parts by mass or more and 4.0 parts by mass or less.
Specific examples and preferred embodiments of the component (A) and the component (B2) in the method for suppressing heat generation by hydration of the water-hard composition of the present invention are the same as those of the heat-generating inhibitor for water-hard composition of the present invention. Further, it is preferable that the molar ratio of (A) / (B2) and the mass ratio of (A) / (B2) are also in the same range as the hydration heat suppressant for the water-hard composition of the present invention.
Further, specific examples and preferred embodiments of the water-hard powder in the method for suppressing hydration heat generation of the water-hard composition of the present invention are the same as those of the water-hard composition of the present invention containing the component (B2).
Further, specific examples and preferred embodiments of the water-hard composition in the method for suppressing hydration heat generation of the water-hard composition of the present invention are the same as those of the water-hard composition of the present invention containing the component (B2). The method for suppressing hydration heat generation of the water-hard composition of the present invention can target the water-hard composition of the present invention containing the component (B2).

In the method for suppressing hydration heat generation of the water-hard composition of the present invention, the component (A) and the component (B2) are added to 100 parts by mass of the water-hard powder, and the total of the components (A) and (B2) is added. The amount is 0.05 parts by mass or more, preferably 0.1 parts by mass or more, more preferably 0.15 parts by mass or more, still more preferably 0.5 parts by mass or more, and from the viewpoint of delay in hydration reaction. It is contained in an amount of 4.0 parts by mass or less, preferably 2.0 parts by mass or less, and more preferably 1.0 part by mass or less.
In the method for suppressing hydration heat generation of the hydraulic composition of the present invention, it is preferable to add the component (A) and the component (B2) when producing the hydraulic composition.

In the method for suppressing hydration heat generation of the hydraulic composition of the present invention, it is preferable to use at least one of the component (A) and the component (B2) in a liquid state. Further, it is preferable to dissolve at least one of the component (A) and the component (B2) in water or an organic solvent before use.

Organic solvents include methanol, ethanol, propanol, butanol, pentanol, hexanol, butanol, octanol, decanol, oleyl alcohol, isopropanol, isobutanol, isopentanol, 2-ethylhexanol, isostearyl alcohol, ethylene glycol, propylene glycol. 1,3-Propanediol, 1,4-butanediol, neopentylglycol, diethyleneglycol, glycerin, butylglycol, butyldiglycol, butyltriglycol, benzyl alcohol, diethyl ether, chloromethane, dichloromethane, trichloromethane, chloroform, Examples thereof include acetone, dimethyl ketone, methyl ethyl ketone, pentane, hexane, heptane, octane, nonane, decane, toluene, xylene, petroleum ether, paraffin, vegetable fatty oil and the like, and one or more of these can be used. The organic solvent is preferably one or more selected from propylene glycol, butyltriglycol, paraffin and vegetable oil, from the viewpoint of flammability and compatibility with the ester compound as the component (A), and more preferably. It is one or more selected from propylene glycol and butyltriglycol, and more preferably butyltriglycol.

When the component (A) and / or the component (B2) is dissolved in an organic solvent and used in the method for suppressing the heat generation of hydration of the water-hard composition of the present invention, the organic solvent and the component (A) and / or the component (B2) are used. From the viewpoint of compatibility with (A) component and / or (B2) component and the organic solvent, the mass ratio is [(A) component and / or (B2) component] / organic solvent, preferably 0. It is preferably 1 or more, more preferably 0.2 or more, and preferably 9 or less, more preferably 5 or less, from the viewpoint of the viscosity of the mixture of the component (A) and / or the component (B2) and the organic solvent.

When the component (A) and / or the component (B2) is dissolved in water and used in the method for suppressing the heat generation of hydration of the water-hard composition of the present invention, the component (A) and / or the component (B2) and water are used. The mass ratio is [(A) component and / or (B2) component] / water, preferably 0.5 or more, more preferably 1.0 or more, and preferably 10.0 or less, more preferably 5. It is 0 or less.

In the method for suppressing hydration heat generation of the water-hard composition of the present invention, the defoaming agent of the component (C) and the dispersant of the component (D) can be contained in the water-hard composition. Specific examples and preferred embodiments of the component (C) are the same as those of the hydration heat suppressant for hydraulic composition of the present invention. Further, specific examples and preferred embodiments of the component (D) are the same as those of the hydraulic composition of the present invention containing the component (B1).

From the viewpoint of easy diffusion in the water-hard composition, the component (A) and / or the component (B2) and the organic solvent are mixed in advance, and then the dispersant of the component (D) and water are added thereto. After mixing, it is preferable to add to the water-hard powder and mix. Further, a mixture of the component (A) and / or the component (B2) and an organic solvent, and a mixture of the dispersant of the component (D) and water are prepared, respectively, and separately added to the water-hard powder and mixed. You may.

A mixture of water-hard powder and water (preferably a mixture of a dispersant of component (D) and water), and a water-hard powder to which water (preferably a mixture of a dispersant of component (D) and water) is added. Mixing of the component (A) and the component (B2) (preferably a mixture of the component (A) and / or the component (B2) with an organic solvent) shall be carried out using a mixer such as a mortar mixer or a forced twin-screw mixer. Can be done. The mixing time is preferably 1 minute or longer, more preferably 2 minutes or longer, and preferably 5 minutes or shorter, more preferably 3 minutes or shorter. In preparing the hydraulic composition, the materials and agents described in the hydraulic composition of the present invention containing the component (B2) and their amounts can be used.

It is preferable that the water-hard composition obtained by the method for suppressing hydration heat generation of the water-hard composition of the present invention is filled in a mold, cured and cured. Examples of the formwork include formwork for buildings, formwork for concrete products, and the like. Examples of the filling method into the mold include a method of directly charging from a mixer, a method of pumping a hydraulic composition with a pump, and a method of introducing the hydraulic composition into the mold.

In the present invention, the time from contacting water with water to demolding in the preparation of the hydraulic composition is 16 hours or more and 72 hours from the viewpoint of obtaining the strength required for demolding and improving the production cycle. The following is preferable.

The hydraulic composition obtained by the method for suppressing the heat generation of hydration of the hydraulic composition of the present invention is the temperature of the hydraulic composition by suppressing the temperature rise and the rate of temperature rise due to the heat generation of hydration of the hydraulic composition. Since cracks can be reduced, it can be suitably used for mass concrete production. As a rough guide, mass concrete is 80 to 100 cm or more in thickness for wide slabs and 50 cm or more in thickness for walls with constrained lower ends in the concrete standard specification (March 2013, published by the Civil Engineering Society). Civil engineering structures include quay walls, breakwaters, box calverts, piers, bridges, dams, etc., and building structures include pillars, beams, floorboards, etc.

<Example 1a and Comparative Example 1a>
The mortar formulation is shown in Table 1 and the evaluation results are shown in Table 2. The compounds in the table are as follows.
(A) Component-Alkyl polyglycoside: 8 to 16 carbon atoms of the alkyl chain, 10 carbon atoms of the alkyl chain, 1.1 sugar condensation degree, higher alcohol adduct of glucose

(B1) Ingredients-The ones in Table 2 were used. The numbers in parentheses in Table 2 are the average number of moles of ethylene oxide added, and indicate p1 in the general formula (B11) or q1 + r1 in the general formula (B13).

The mass ratio (W / C) of water to the water-hard powder is 50% (50 parts by mass of water with respect to 100 parts by mass of the water-hard powder). The fine aggregate is 338 parts by mass with respect to 100 parts by mass of the hydraulic powder. The components used are as follows.
・ W: Kneaded water (tap water containing dispersant)
・ C: Ordinary Portland cement (manufactured by Taiheiyo Cement Co., Ltd., density 3.16 g / cm ³ , gypsum content 4.5% by mass)
・ S: Fine aggregate (Joyo mountain sand, density 2.56 g / cm ³ )

<Preparation and evaluation of mortar>
(1) Preparation of mortar Under the compounding conditions shown in Table 1, a hydraulic powder (C) and fine aggregate (C) were used using a mortar mixer (Universal Mixer / Stirrer Model: 5DM-03-γ) manufactured by Dalton Co., Ltd. S) was added and empty kneading was performed for 10 seconds, and kneading water (W) containing the components (A) and (B1) in the table was added. At this time, a defoaming agent (silicone-based defoaming agent, manufactured by Toray Dow Corning Co., Ltd.) was added so that the amount of air entrained was 2% or less. Then, the mortar was prepared by kneading at a low speed rotation (63 rpm) of the mortar mixer for 120 seconds.

(2) Evaluation of fluidity The flow of the prepared mortar was measured according to the test method of JIS R5201. However, the operation of giving a falling motion is not performed. The results are shown in Table 2.

In Table 2, the parts by mass of the component (A) and the component (B1) are the amounts of the component (A) and the component (B1) added to 100 parts by mass of the hydraulic powder, respectively.

<Example 2a and Comparative Example 2a>
20 g of mortar containing the component (A) and the component (B1) as shown in Table 3 was placed in a constant temperature calorimeter (manufactured by TAM Air, TA instrument), and the hydration heat generation rate changed over time under constant conditions of 20 ° C. Was measured. The time when the time derivative d ² Q / dt ² of the exothermic rate became a positive value was defined as the hydration reaction start time and evaluated. The results are shown in Table 3. The mortar was obtained by kneading in the same manner as in (1) of Example 1a. The mortars of Examples 2a-1, 2a-2 and Comparative Example 2a-1 in Table 3 correspond to the mortars of Examples 1a-7, 1a-6 and Comparative Example 1a-3, respectively.

<Example 1b and Comparative Example 1b>
The mortar formulation is shown in Table 4, and the evaluation results are shown in Table 5. The compounds in the table are as follows.
(A) Component-Alkyl polyglycoside: 8 to 16 carbon atoms of the alkyl chain, 10 carbon atoms of the alkyl chain, 1.1 sugar condensation degree, higher alcohol adduct of glucose

(B2) Ingredients-Polyoxyethylene (1) Lauryl ether: Average number of moles of ethylene oxide added, numbers in parentheses are average number of moles of ethylene oxide added (same below), HLB5.2
Polyoxyethylene (2) lauryl ether: ethylene oxide average number of moles added 2, HLB 6.3
Polyoxyethylene (3) lauryl ether: ethylene oxide average number of moles added 3, HLB 8.1
Polyoxyethylene (4) lauryl ether: ethylene oxide average number of moles added 4, HLB 9.6
Polyoxyethylene (5) lauryl ether: ethylene oxide average number of moles added 5, HLB 10.5
Polyoxyethylene (4) nonylphenyl ether: ethylene oxide average number of moles added 4, HLB 8.9
Palm kernel oil fatty acid diethanolamide: A mixture of alkyl diethanolamide and glycerin having 8 to 18 carbon atoms in the alkyl / alkenyl chain and an average molecular number of 13.5 in the alkyl / alkenyl chain, HLB 5.5 (glycerin content 10% by mass). , Table 5 shows the tangible mass part.)
Palm oil fatty acid methylethanolamide: A mixture of alkyldiethanolamide and glycerin having 8 to 18 carbon atoms in the alkyl / alkenyl chain and an average molecular number of 13.0 in the alkyl / alkenyl chain, HLB3.3 (glycerin content 10% by mass). , Table 5 shows the tangible mass part.)
Polyoxyethylene (2) laurylamine: ethylene oxide average number of moles added 2, HLB 6.3
-Polyoxyethylene (6) monooleate: HLB9.2

(A') component (comparative component of (A) component)
-Phenyl glycoside: Reagent manufactured by Tokyo Chemical Industry Co., Ltd., Product code: P0178 (For convenience, it is shown in the column of (A) component in Table 5).

Dispersant / polycarboxylic acid-based copolymer: Complex of lignin sulfonic acid compound and polycarboxylic acid ether

The mass ratio (W / C) of water to the water-hard powder is 50% (50 parts by mass of water with respect to 100 parts by mass of the water-hard powder). The fine aggregate is 338 parts by mass with respect to 100 parts by mass of the hydraulic powder. The components used are as follows.
・ W: Kneaded water (tap water containing dispersant)
・ C: Blast furnace cement type B (manufactured by Taiheiyo Cement Co., Ltd., density 3.04 g / cm ³ , gypsum content 4.0% by mass)
・ S: Fine aggregate (manufactured by Cement Association, standard sand for cement strength test, density 2.64 g / cm ³ )

<Preparation and evaluation of mortar>
(1) Preparation of mortar Under the compounding conditions shown in Table 4, a hydraulic powder (C) and fine aggregate (C) were used using a mortar mixer (Universal Mixer / Stirrer Model: 5DM-03-γ manufactured by Dalton Co., Ltd.). S) was added and dry kneading was performed for 10 seconds, and kneading water (W) containing the component (A) or the component (A'), the component (B2), and the dispersant (when used) was added. At this time, a defoaming agent (silicone-based defoaming agent, manufactured by Toray Dow Corning Co., Ltd.) was added so that the amount of air entrained was 2% or less. Then, the mortar was prepared by kneading at a low speed rotation (63 rpm) of the mortar mixer for 120 seconds.

(2) Evaluation of increase in heat insulation temperature due to hydration heat generation of hydraulic powder Fill a 1 L polypropylene disposable cup with kneaded mortar, insert a thermocouple into the center of the mortar, and then insert the cup into a 1 L Dewar. It was loaded into a bottle and sealed with a cork stopper. The Dewar bottle was allowed to stand in a styrofoam container (thickness 140 mm) filled with polystyrene foam beads, and the temperature change of the mortar was measured over time with a data logger. A schematic diagram of this measurement method is shown in FIG.
The amount of temperature increase from the temperature at the time of contact of the hydraulic powder to the maximum temperature was defined as the amount of adiabatic temperature increase. The results are shown in Table 5. Further, in Table 5, the difference in the amount of increase in the adiabatic temperature between each example and the comparative example is shown with reference to Comparative Example 1b-1. It can be said that the larger the difference in the amount of increase in the adiabatic temperature is, the better the suppression of the temperature increase due to the heat generation of hydration of the hydraulic powder.

In Table 5, the parts by mass of the component (A) and the component (B2) are the amounts of the component (A) and the component (B2) added to 100 parts by mass of the hydraulic powder, respectively. The mass portion of the dispersant in the table is the amount of the dispersant added to 100 parts by mass of the hydraulic powder.

Claims (25)

(A) At least one (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less [hereinafter, (A)). Ingredients] and
(B2) Nonionic surfactant represented by the following general formula (B21), nonionic surfactant represented by the following general formula (B22), nonionic surfactant represented by the following general formula (B23). At least a nonionic surfactant selected from a surfactant and a nonionic surfactant represented by the following general formula (B24) and having an HLB value of 2 or more and 11 or less. One type [hereinafter referred to as (B2) component] and
A hydration heat suppressant for a hydraulic composition containing.

[In the ceremony,
R ^11b , R ^31b : From an alkyl group having 8 or more and 22 carbon atoms, an alkenyl group having 8 or more and 22 carbon atoms, an aralkyl group having 8 or more and 22 carbon atoms, and a substituted aryl group having 8 or more and 22 carbon atoms, respectively. Selected groups R ^21b and R ^41b : Alkyl groups with 7 or more and 21 or less carbon atoms, alkenyl groups with 7 or more and 21 or less carbon atoms, aralkyl groups with 7 or more and 21 or less carbon atoms, and substitutions with 7 or more and 21 or less carbon atoms, respectively. Group selected from aryl groups R ^22b : alkylene group having ² or more and 4 or less carbon atoms: alkyl group having 1 or more and 3 or less carbon atoms, and R ^22b , a group selected from groups represented by -OH, R ^32b , R ^33b : Hydrogen atom or alkyl group having 1 or more and 3 or less carbon atoms AO: alkyleneoxy group having 2 or more and 4 or less carbon atoms p2: Number of 0.5 or more and 20 or less q2, r2: Number of 0 or more, respectively. , Q2 and r2 are totals of 0.5 or more and 20 or less. ] The hydration heat suppressant for a hydraulic composition according to claim 1 , further comprising (C) an antifoaming agent. The hydration heat suppressant for a water-hard composition according to claim 1 or 2 , wherein the molar ratio of the component (A) to the component (B2) is 0.10 or more and 10.0 or less in (A) / (B2). .. The water for a water-hard composition according to any one of claims 1 to 3 , wherein the mass ratio of the component (A) to the component (B2) is 0.05 or more and 4.0 or less in (A) / (B2). Japanese heat suppressant. With hydraulic powder,
water and,
(A) At least one (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less [hereinafter, (A)). Ingredients] and
(B2) Nonionic surfactant represented by the following general formula (B21), nonionic surfactant represented by the following general formula (B22), nonionic surfactant represented by the following general formula (B23). At least a nonionic surfactant selected from a surfactant and a nonionic surfactant represented by the following general formula (B24) and having an HLB value of 2 or more and 11 or less. One type [hereinafter referred to as (B2) component] and
A hydraulic composition containing
The total content of the component (A) and the component (B2) is 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the hydraulic powder.
Hydraulic composition.

[In the ceremony,
R ^11b , R ^31b : From an alkyl group having 8 or more and 22 carbon atoms, an alkenyl group having 8 or more and 22 carbon atoms, an aralkyl group having 8 or more and 22 carbon atoms, and a substituted aryl group having 8 or more and 22 carbon atoms, respectively. Selected groups R ^21b and R ^41b : Alkyl groups with 7 or more and 21 or less carbon atoms, alkenyl groups with 7 or more and 21 or less carbon atoms, aralkyl groups with 7 or more and 21 or less carbon atoms, and substitutions with 7 or more and 21 or less carbon atoms, respectively. Group selected from aryl groups R ^22b : alkylene group having ² or more and 4 or less carbon atoms: alkyl group having 1 or more and 3 or less carbon atoms, and R ^22b , a group selected from groups represented by -OH, R ^32b , R ^33b : Hydrogen atom or alkyl group having 1 or more and 3 or less carbon atoms AO: alkyleneoxy group having 2 or more and 4 or less carbon atoms p2: Number of 0.5 or more and 20 or less q2, r2: Number of 0 or more, respectively. , Q2 and r2 are totals of 0.5 or more and 20 or less. ] The hydraulic composition according to claim 5 , further comprising (C) an antifoaming agent. The hydraulic composition according to claim 5 or 6 , further comprising (D) a dispersant. The water-hard composition according to claim 7 , wherein (D) is one or more dispersants selected from a polycarboxylic acid-based copolymer, a lignin sulfonic acid-based copolymer, and a naphthalene sulfonic acid-based copolymer. thing. The hydraulic composition according to any one of claims 5 to 8 , wherein the molar ratio of the component (A) to the component (B2) is 0.1 or more and 10.0 or less in (A) / (B2). .. The hydraulic composition according to any one of claims 5 to 9 , wherein the mass ratio of the component (A) to the component (B2) is 0.05 or more and 4.0 or less in (A) / (B2). The water-hard composition according to any one of claims 5 to 10 , wherein the water-hard powder is a water-hard powder having a gypsum content of 20% by mass or less. Any one of claims 5 to 11 , wherein the total content of the component (A) and the component (B2) is 0.1 part by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the water-hard powder. The water-hardening composition according to the above. A method for producing a hydraulic composition, which comprises mixing a hydraulic powder, water, the following component (A), and the following component (B2).
The total content of the component (A) and the component (B2) is 0.05 parts by mass or more and 4.0 parts by mass or less with respect to 100 parts by mass of the hydraulic powder. Mix to be,
A method for producing a hydraulic composition.
Component (A): At least one (B2) component of a (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less. : Nonionic surfactant represented by the following general formula (B21), nonionic surfactant represented by the following general formula (B22), nonionic surfactant represented by the following general formula (B23) At least one nonionic surfactant having an HLB value of 2 or more and 11 or less, which is a nonionic surfactant selected from the agent and the nonionic surfactant represented by the following general formula (B24).

[In the ceremony,
R ^11b , R ^31b : From an alkyl group having 8 or more and 22 carbon atoms, an alkenyl group having 8 or more and 22 carbon atoms, an aralkyl group having 8 or more and 22 carbon atoms, and a substituted aryl group having 8 or more and 22 carbon atoms, respectively. Selected groups R ^21b and R ^41b : Alkyl groups with 7 or more and 21 or less carbon atoms, alkenyl groups with 7 or more and 21 or less carbon atoms, aralkyl groups with 7 or more and 21 or less carbon atoms, and substitutions with 7 or more and 21 or less carbon atoms, respectively. Group selected from aryl groups R ^22b : alkylene group having ² or more and 4 or less carbon atoms: alkyl group having 1 or more and 3 or less carbon atoms, and R ^22b , a group selected from groups represented by -OH, R ^32b , R ^33b : Hydrogen atom or alkyl group having 1 or more and 3 or less carbon atoms AO: alkyleneoxy group having 2 or more and 4 or less carbon atoms p2: Number of 0.5 or more and 20 or less q2, r2: Number of 0 or more, respectively. , Q2 and r2 are totals of 0.5 or more and 20 or less. ] The method for producing a hydraulic composition according to claim 13 , further comprising (C) a defoaming agent. Claimed to mix the component (A) and the component (B2) so that the molar ratio of the component (A) and the component (B2) is 0.1 or more and 10.0 or less in (A) / (B2). Item 3. The method for producing a hydraulic composition according to Item 13 or 14 . Claimed to mix the component (A) and the component (B2) so that the mass ratio of the component (A) and the component (B2) is 0.05 or more and 4.0 or less in (A) / (B2). Item 6. The method for producing a hydraulic composition according to any one of Items 13 to 15 . The method for producing a water-hard composition according to any one of claims 13 to 16 , wherein the water-hard powder is a water-hard powder having a gypsum content of 20% by mass or less. The total content of the component (A) and the component (B2), the component (A) and the component (B2) is 0.1 part by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the water-hard powder. The method for producing a water-hardening composition according to any one of claims 13 to 17 , wherein the mixture is mixed so as to be. The following component (A) and the following component (B2) are added to a water-hardening composition containing water and a water-hard powder, and the component (A) and the component (B2) are added to 100 parts by mass of the water-hard powder. A method for suppressing hydration heat generation of a water-hard composition, which comprises 0.05 parts by mass or more and 4.0 parts by mass or less as the total amount of.
Component (A): At least one (B2) component of a (poly) glycoside having an alkyl group having 8 or more and 20 or less carbon atoms or an alkenyl group having 8 or more and 20 or less carbon atoms and having a sugar condensation degree of 1 or more and 5 or less. : Nonionic surfactant represented by the following general formula (B21), nonionic surfactant represented by the following general formula (B22), nonionic surfactant represented by the following general formula (B23) At least one nonionic surfactant having an HLB value of 2 or more and 11 or less, which is a nonionic surfactant selected from the agent and the nonionic surfactant represented by the following general formula (B24).

[In the ceremony,
R ^11b , R ^31b : From an alkyl group having 8 or more and 22 carbon atoms, an alkenyl group having 8 or more and 22 carbon atoms, an aralkyl group having 8 or more and 22 carbon atoms, and a substituted aryl group having 8 or more and 22 carbon atoms, respectively. Selected groups R ^21b and R ^41b : Alkyl groups with 7 or more and 21 or less carbon atoms, alkenyl groups with 7 or more and 21 or less carbon atoms, aralkyl groups with 7 or more and 21 or less carbon atoms, and substitutions with 7 or more and 21 or less carbon atoms, respectively. Group selected from aryl groups R ^22b : alkylene group having ² or more and 4 or less carbon atoms: alkyl group having 1 or more and 3 or less carbon atoms, and R ^22b , a group selected from groups represented by -OH, R ^32b , R ^33b : Hydrogen atom or alkyl group having 1 or more and 3 or less carbon atoms AO: alkyleneoxy group having 2 or more and 4 or less carbon atoms p2: Number of 0.5 or more and 20 or less q2, r2: Number of 0 or more, respectively. , Q2 and r2 are totals of 0.5 or more and 20 or less. ] The method for suppressing hydration heat generation of a hydraulic composition according to claim 19 , wherein at least one of the component (A) and the component (B2) is used in a liquid state. The method for suppressing hydration heat generation of a hydraulic composition according to claim 19 or 20 , wherein at least one of the component (A) and the component (B2) is dissolved in water or an organic solvent and used. The hydraulic composition according to any one of claims 19 to 21 , wherein the component (A) and the component (B2) are used in a molar ratio of (A) / (B2) = 0.1 or more and 10.0 or less. A method for suppressing heat generation by hydration of an object. The hydraulic composition according to any one of claims 19 to 22 , wherein the component (A) and the component (B2) are used in a mass ratio of (A) / (B2) = 0.05 or more and 4.0 or less. A method for suppressing heat generation by hydration of an object. The method for suppressing hydration heat generation of a water-hard composition according to any one of claims 19 to 23 , wherein the water-hard powder is a water-hard powder having a gypsum content of 20% by mass or less. The total amount of the component (A) and the component (B2) is 0.1 part by mass or more and 2.0 parts by mass or less as the total amount of the component (A) and the component (B2) with respect to 100 parts by mass of the water-hard powder. The method for suppressing hydration heat generation of a water-hard composition according to any one of claims 19 to 24 .

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