Liquid rheology modifier

Abstract

To provide a liquid rheology modifier which suppresses bleeding despite low viscosity when contained in a hydraulic slurry composition, and to provide a hydraulic slurry composition in which bleeding is suppressed despite low viscosity.SOLUTION: The liquid rheology modifier contains a compound (A) represented by the following general formula (1), a solvent having an SP value calculated by the Fedors method of 10.0 or more and 16.0 or less, and water. In the compound (A), the content of oleylamidopropyl dimethylamine oxide is 80 mass% or more. X is a group represented by R1a or R2a-[CONH-CH2CH2CH2]n-; R1a and R2a are each an alkyl group or the like; and R2 and R3 are each an alkyl group or the like.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to liquid rheology modifiers. [Background technology]

[0002] Many industrial products used in the form of an aqueous solution or slurry contain various kinds of additives to improve their physical properties. For example, in order to modify the rheology of an aqueous solution or slurry, it may be desirable to adjust the viscosity appropriately according to the purpose or use. Conventionally, measures such as the addition of a thickener or a viscosity reducer, heating or cooling operations, and adjustment of electrolyte concentration have been adopted to adjust the viscosity of an aqueous solution or slurry. It is also known that surfactants affect the viscosity, elasticity, thickening, etc. of an aqueous solution or slurry. In hydraulic slurry compositions containing hydraulic powders such as cement, rheology modifiers are sometimes used to improve physical properties such as viscosity and resistance to material separation.

[0003] Patent Document 1 describes a rheology modifier containing two or more compounds represented by general formula (1), in which X in the general formula (1) is different for the two or more compounds, and at least one of the two or more compounds is R of X in the general formula (1). 1a or R 1b A rheology modifier which exhibits a rheology modifying effect over a wide temperature range and which is a compound having an alkenyl group is disclosed. Patent Document 2 describes a composition containing water, a hydraulic powder, and two or more compounds represented by general formula (1), wherein X in general formula (1) is different, and X is R 1a or R 1b -[CONH-CH2CH2CH2] n -, and at least one of the two or more compounds is R 1a or R 1b A hydraulic composition for ground injection, which is inhibited from bleeding, is disclosed, in which is a compound having an alkenyl group. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-76022 A [Patent Document 2] JP 2021-169389 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a liquid rheology modifier which, when contained in a hydraulic slurry composition, inhibits bleeding while exhibiting low viscosity, and a hydraulic slurry composition which inhibits bleeding while exhibiting low viscosity. [Means for solving the problem]

[0006] The present invention provides a liquid rheology modifier comprising a compound represented by the following general formula (1) [hereinafter referred to as compound (A)], a solvent having an SP value of 10.0 or more and 16.0 or less according to the Fedors method [hereinafter referred to as solvent (B)], and water, The present invention relates to a liquid rheology modifier, in which the content of oleylamidopropyldimethylamine oxide (hereinafter referred to as compound (a1)) in compound (A) is 80 mass % or more.

[0007] [ka]

[0008] [Wherein, X is R 1a or R 2a -[CONH-CH2CH2CH2] n R is a group represented by the formula: 1a R is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. 2a is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. n is an integer of 1 to 3. 2 and R3 are each independently an alkyl group having 1 to 4 carbon atoms or -(C2H4O) p H. p is the average number of moles added, and R 2 and R 3 The sum of these is a number between 0 and 5.

[0009] The present invention also relates to a hydraulic slurry composition containing the liquid rheology modifier of the present invention, a hydraulic powder, and water.

[0010] The present invention also relates to a method for producing a hydraulic slurry composition, which comprises mixing the liquid rheology modifier of the present invention, a hydraulic powder, and water.

[0011] The present invention also relates to a plastic grout composition comprising the hydraulic slurry composition of the present invention and a plasticizer. Effect of the Invention

[0012] According to the present invention, there are provided a liquid rheology modifier which, when contained in a hydraulic slurry composition, inhibits bleeding while having low viscosity, and a hydraulic slurry composition which inhibits bleeding while having low viscosity.

[0013] In addition, the hydraulic slurry composition of the present invention has low viscosity while suppressing bleeding, and further has excellent miscibility with plasticizers, so that escape of the hydraulic slurry composition can be immediately prevented when mixed with a plasticizer, and since high filling properties can be obtained by pressing and bleeding is suppressed, the hydraulic slurry composition can be suitably used as a plastic grout composition. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The reason why the liquid rheology modifier of the present invention suppresses bleeding while having low viscosity when contained in a hydraulic slurry composition is not necessarily clear, but is presumed to be as follows. When the liquid rheology modifier of the present invention is contained in a hydraulic slurry composition, compound (A) exerts a rheology modifying effect, and the structure (string-like micelle) formed by compound (A) is easily broken by external force, and the hydraulic slurry composition is easily made low-viscosity. However, when this structure is not subjected to external force, the structure of compound (A) can be instantly reformed, so it is presumed that bleeding of the hydraulic slurry composition can be suppressed. Furthermore, when compound (A) does not contain a solvent, it is in a gel state and is difficult to dissolve uniformly in the hydraulic slurry, so that the rheology modifying effect cannot be fully exerted and the bleeding suppression effect is reduced, but it is considered that the rheology modifier of the present invention becomes liquid by containing a specific solvent, which is the component (B) of the present invention, and is uniformly mixed into the hydraulic slurry composition, thereby playing a role in supporting the bleeding suppression effect.

[0015] [Rheology modifier] The liquid rheology modifier of the present invention contains a compound represented by the above general formula (1) [hereinafter referred to as compound (A)].

[0016] In the compound (A), preferred embodiments are as follows. In the general formula (1), X is R 1a or R 2a -[CONH-CH2CH2CH2] n -, preferably R 2a -[CONH-CH2CH2CH2] n - is a group represented by the formula: R 1a is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. R 1a When is an alkenyl group, the number of carbon atoms is preferably 14 or more, more preferably 16 or more, and preferably 22 or less, more preferably 20 or less, from the viewpoint of the rheology modifying effect. R 1aWhen the alkyl group is an alkyl group, the number of carbon atoms is preferably 14 or more, more preferably 16 or more, and preferably 22 or less, more preferably 20 or less, from the viewpoint of the viscosity of the hydraulic slurry composition. R 2a is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. R 2a When is an alkenyl group, the number of carbon atoms is preferably 13 or more, more preferably 15 or more, and preferably 21 or less, more preferably 19 or less, from the viewpoint of the rheology modifying effect. R 2a When the alkyl group is an alkyl group, the number of carbon atoms is preferably 13 or more, more preferably 15 or more, and preferably 21 or less, more preferably 19 or less, from the viewpoint of the viscosity of the hydraulic slurry composition. n is preferably 1. R 2 and R 3 are each independently preferably an alkyl group having 1 to 2 carbon atoms or -(C2H4O) p It is a group represented by H. p is preferably a number between 0 and 3.

[0017] From the viewpoint of achieving both low viscosity and bleeding suppression of the hydraulic slurry composition, the compound (A) contains oleylamidopropyldimethylamine oxide (hereinafter referred to as compound (a1)). The content of the compound (a1) in the compound (A) is 80 mass% or more, preferably 85 mass% or more, more preferably 90 mass% or more, and preferably 100 mass% or less, from the viewpoint of achieving both low viscosity and bleeding suppression of the hydraulic slurry composition. The content of compound (a1) in compound (A) may be 100 mass %, that is, compound (A) may be compound (a1).

[0018] The compound (A) may contain a compound represented by the general formula (1) other than the compound (a1) [hereinafter referred to as compound (a2)].

[0019] In the compound (a2), preferred embodiments are as follows. In the general formula (1), X is R 1a or R 2a -[CONH-CH2CH2CH2] n - is a group represented by the formula: R 1a is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. R 1a When is an alkenyl group, the number of carbon atoms is preferably 14 or more, more preferably 16 or more, and preferably 22 or less, more preferably 20 or less, from the viewpoint of achieving both low viscosity and bleeding suppression of the hydraulic slurry composition. R 1a When the alkyl group is an alkyl group, the number of carbon atoms is preferably 14 or more, more preferably 16 or more, and is preferably 22 or less, more preferably 20 or less, from the viewpoint of achieving both low viscosity and suppression of bleeding of the hydraulic slurry composition. R 2a is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. R 2a When is an alkenyl group, the number of carbon atoms is preferably 13 or more and preferably 21 or less, more preferably 19 or less, even more preferably 17 or less, and still more preferably 15 or less, from the viewpoint of achieving both low viscosity and suppression of bleeding of the hydraulic slurry composition. R 2a When the alkyl group is an alkyl group, the number of carbon atoms is preferably 13 or more, more preferably 15 or more, and is preferably 21 or less, more preferably 19 or less, from the viewpoint of achieving both low viscosity and suppression of bleeding of the hydraulic slurry composition. n is preferably 1. R 2 and R 3 are each independently preferably an alkyl group having 1 to 2 carbon atoms or -(C2H4O) p It is a group represented by H. p is preferably a number between 0 and 3.

[0020] The liquid rheology modifier of the present invention contains a solvent (hereinafter referred to as solvent (B)) having an SP value of 10.0 or more and 16.0 or less as measured by the Fedors method. The SP value is the solubility parameter value according to the Fedors method.

[0021] The SP value of the solvent (B) is, from the viewpoint of enhancing the bleeding suppression effect, 10.0 or more, preferably 11.0 or more, more preferably 12.0 or more, even more preferably 13.0 or more, and even more preferably 14.0 or more, and from the viewpoint of making the compound (A) liquid, it is preferably 16.0 or less.

[0022] The solvent (B) is preferably an alcohol compound having 2 to 8 carbon atoms, from the viewpoints of making the compound (A) liquid and enhancing the bleeding suppression effect. Specifically, the solvent (B) is diethylene glycol monobutyl ether (SP value 10.5), 2-butoxyethanol (SP value 10.8), ethylene glycol monoisopropyl ether (SP value 11.1), 1-butanol (SP value 11.3), 2-methoxyethanol (SP value 12.0), triethylene glycol monobutyl ether (SP value 10.3), propylene glycol monobutyl ether (SP value 10.4), propyl propylene glycol (SP value 10.5), 2-dimethylaminoethanol (SP value 10.6), 2-dimethylaminoethanol (SP value 10.7), 2-dimethylaminoethanol (SP value 10.8), 2-dimethylaminoethanol (SP value 10.9 ... Examples of the suitable monomer units include ethanol (SP value 11.3), diethanolamine (SP value 15.4), 2-methylpentane-2,4-diol (SP value 13.1), dipropylene glycol (SP value 13.3), 1,3-butanediol (SP value 14.8), 1,4-butanediol (SP value 15.0), diethylene glycol (SP value 15.0), neopentyl glycol (SP value 13.8), propylene glycol (SP value 15.9), and ethylene glycol (SP value 17.8).

[0023] From the viewpoint of liquidizing the compound (A) and supporting the bleeding suppression effect, the solvent (B) is preferably one or more selected from 1,4-butanediol (SP value 15.0), propylene glycol (SP value 15.9), 2-methoxyethanol (SP value 12.0), dipropylene glycol (SP value 13.3), neopentyl glycol (SP value 13.8), and 1-butanol (SP value 11.3), more preferably one or more selected from 1,4-butanediol (SP value 15.0), propylene glycol (SP value 15.9), dipropylene glycol (SP value 13.3), and neopentyl glycol (SP value 13.8), more preferably one or more selected from 1,4-butanediol, propylene glycol, neopentyl glycol, and 1-butanol, and even more preferably one or more selected from 1,4-butanediol and propylene glycol.

[0024] In the liquid rheology modifier of the present invention, from the viewpoint of obtaining a sufficient rheology modifying effect with a small addition amount to a hydraulic slurry composition, the content of compound (A) is preferably 20 mass% or more, more preferably 25 mass% or more, even more preferably 30 mass% or more, and preferably 50 mass% or less, more preferably 40 mass% or less, even more preferably 35 mass% or less.

[0025] In the liquid rheology modifier of the present invention, from the viewpoint of making the compound (A) non-hazardous and liquefying the compound (A), the content of the solvent (B) is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 20% by mass or more, still more preferably 25% by mass or more, and preferably 50% by mass or less, more preferably 45% by mass or less, even more preferably 40% by mass or less, and still more preferably 35% by mass or less.

[0026] In the liquid rheology modifier of the present invention, the mass ratio (B) / (A) of the content of the compound (A) to the content of the solvent (B) is, from the viewpoints of liquefying the compound (A) and simultaneously achieving low viscosity and suppression of bleeding of the hydraulic slurry composition, preferably 0.15 or more, more preferably 0.3 or more, even more preferably 1 or more, and preferably 3 or less, more preferably 2 or less, even more preferably 1.5 or less.

[0027] The liquid rheology modifier of the present invention contains water. The water content in the liquid rheology modifier of the present invention is preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 25% by mass or more, and preferably 60% by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less.

[0028] The liquid rheology modifier of the present invention may contain a dispersant. When the object to which the liquid rheology modifier of the present invention is applied is a hydraulic slurry composition, the dispersant is a preferred component from the viewpoint of exhibiting a good rheology modifying effect and fluidity.

[0029] Examples of the dispersant include naphthalene-based polymers, polycarboxylic acid-based polymers, melamine-based polymers, phenol-based polymers, and lignin-based polymers.

[0030] More specifically, the dispersant may be one or more dispersants selected from (C1) naphthalene-based dispersants, (C2) polycarboxylic acid-based dispersants, (C3) dispersants made of the polycondensation products described below (hereinafter also referred to as PAE-based dispersants), (C4) lignin-based dispersants, and (C5) melamine-based dispersants. <Polycondensation products> A polycondensation product consisting of the following components C31, C33, and optionally C32: [Component C31] Aromatic or heteroaromatic compounds having from 5 to 10 carbon or heteroatoms and containing, on average, from 1 to 300 oxyethylene and / or oxypropylene groups per molecule, attached to said aromatic or heteroaromatic compounds via O or N atoms. [Component C32] (C32-1) phenol, (C32-2) phenol ether, (C32-3) naphthol, (C32-4) naphthol ether, (C32-5) aniline, (C32-6) furfuryl alcohol, and (C32-7) an aminoplast former selected from the group consisting of melamine or a derivative thereof, urea or a derivative thereof, and a carboxamide, hydroxybenzoic acid, benzoic acid, isophthalic acid, and oxynaphthoic acid, as an optional component, at least one aromatic compound selected from the group consisting of hydroxybenzoic acid, benzoic acid, isophthalic acid, and oxynaphthoic acid. [Component C33] an aldehyde selected from the group consisting of formaldehyde, glyoxylic acid, and benzaldehyde, or a mixture thereof, wherein the benzaldehyde is further a , SO3M a , and PO3M a (wherein M is H, an alkali metal or alkaline earth metal, ammonium, or an organic amine group, and a can be 1 / 2, 1, or 2).

[0031] From the viewpoint of fluidity of the hydraulic slurry composition, the dispersant is preferably at least one selected from (C1) a naphthalene-based dispersant, (C2) a polycarboxylic acid-based dispersant, and (C4) a lignin-based dispersant, more preferably at least one selected from (C1) a naphthalene-based dispersant, and (C2) a polycarboxylic acid-based dispersant, and further preferably (C2) a polycarboxylic acid-based dispersant. The dispersant will be described below.

[0032] (C1) Naphthalene-based dispersant As the naphthalene-based dispersant, preferably, naphthalene sulfonic acid formaldehyde condensate or its salt can be mentioned. Naphthalene sulfonic acid formaldehyde condensate or its salt is a condensate of naphthalene sulfonic acid and formaldehyde or its salt. Naphthalene sulfonic acid formaldehyde condensate may be co-condensed with aromatic compounds that can be co-condensed with naphthalene sulfonic acid as a monomer, such as, for example, methylnaphthalene, ethylnaphthalene, butylnaphthalene, hydroxynaphthalene, naphthalene carboxylic acid, anthracene, phenol, cresol, creosote oil, tar, melamine, urea, sulfanilic acid and / or their derivatives, as long as the performance is not impaired.

[0033] The naphthalenesulfonic acid formaldehyde condensate or its salt may be, for example, a commercially available product such as Mighty 150, DEMOL N, DEMOL RN, DEMOL MS, DEMOL SN-B, DEMOL SS-L (all manufactured by Kao Corporation), Celluflow 120, Labelin FD-40, Labelin FM-45 (all manufactured by Daiichi Kogyo Co., Ltd.), etc.

[0034] From the viewpoint of improving the fluidity of the hydraulic slurry composition, the naphthalenesulfonic acid formaldehyde condensate or its salt has a weight average molecular weight of preferably 200,000 or less, more preferably 100,000 or less, even more preferably 80,000 or less, even more preferably 50,000 or less, and even more preferably 30,000 or less. From the viewpoint of improving the fluidity of the hydraulic slurry composition, the naphthalenesulfonic acid formaldehyde condensate or its salt has a weight average molecular weight of preferably 1,000 or more, more preferably 3,000 or more, even more preferably 4,000 or more, and even more preferably 5,000 or more. The naphthalenesulfonic acid formaldehyde condensate may be in an acid state or a neutralized product.

[0035] The molecular weight of the naphthalenesulfonic acid-formaldehyde condensate or its salt can be measured by gel permeation chromatography under the following conditions. [GPC conditions] Column: G4000SWXL+G2000SWXL (Tosoh) Eluent: 30mM CH3COONa / CH3CN=6 / 4 Flow rate: 0.7ml / min Detection: UV280nm Sample size: 0.2mg / ml Standard material: Nishio Kogyo Co., Ltd., polystyrene sulfonate sodium conversion (monodisperse polystyrene sulfonate sodium: molecular weight, 206, 1,800, 4,000, 8,000, 18,000, 35,000, 88,000, 780,000) Detector: Tosoh Corporation UV-8020

[0036] (C2) Polycarboxylic acid dispersant Examples of polycarboxylic acid dispersants that can be used include copolymers of monoesters of polyalkylene glycol and (meth)acrylic acid and carboxylic acids such as (meth)acrylic acid (e.g., compounds described in JP-A-8-12397), copolymers of unsaturated alcohols having polyalkylene glycol and carboxylic acids such as (meth)acrylic acid, and copolymers of unsaturated alcohols having polyalkylene glycol and dicarboxylic acids such as maleic acid. Here, (meth)acrylic acid means a carboxylic acid selected from acrylic acid and methacrylic acid.

[0037] As the polycarboxylic acid-based dispersant, a copolymer containing a monomer (c21) represented by the following general formula (c21) as a constituent monomer is preferred from the viewpoint of initial fluidity. The polycarboxylic acid dispersant is more preferably a copolymer containing, as constituent monomers, a monomer (c21) represented by the following general formula (c21) and a monomer (c22) represented by the following general formula (c22).

[0038] [ka]

[0039] [During the ceremony, R 1c , R 2cmay be the same or different, and may be a hydrogen atom or a methyl group. R 3c : Hydrogen atom or -COO(AO) n1 X 1c X 1c : Hydrogen atom or an alkyl group having 1 to 4 carbon atoms AO: a group selected from an ethyleneoxy group and a propyleneoxy group n1: the average number of moles of AO added, a number between 1 and 300 q: a number between 0 and 2 p: number of 0 or 1 Indicates the following.

[0040] [ka]

[0041] [During the ceremony, R 4c , R 5c , R 6c may be the same or different, and may be a hydrogen atom, a methyl group or (CH2) r COOM 2c and (CH2) r COOM 2c COOM 1c or other (CH2) r COOM 2c and an anhydride may be formed, in which case, M 1c , M 2c does not exist. M 1c , M 2c may be the same or different, and are a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), an ammonium group, an alkylammonium group, a substituted alkylammonium group, an alkyl group, a hydroxyalkyl group, or an alkenyl group. r: A number between 0 and 2.

[0042] As the polycarboxylic acid-based dispersant, two or more dispersants differing in the average number of moles of AO added or the ratio of the monomer (c21) to the monomer (c22) may be used.

[0043] A preferred PAE-based dispersant is a dispersant consisting of a polycondensation product of the following components C31, C32, and C33, in which the molar ratio of component C33:(component C31+component C32) is 1:0.01 to 1:10, and the molar ratio of component C31:component C32 is 10:1 to 1:10. [Component C31] A compound in which an average of 1 to 300 oxyethylene groups and / or oxypropylene groups are bonded per molecule via O atoms or N atoms to an aromatic compound selected from the group consisting of phenol, cresol, resorcinol, nonylphenol, methoxyphenol, naphthol, methylnaphthol, butylnaphthol, and bisphenol A. [Component C32] At least one aromatic compound selected from the group consisting of phenoxyacetic acid, phenoxyethanol, phenoxyethanol phosphate, phenoxydiglycol, and phenoxy(poly)ethylene glycol phosphate, hydroxybenzoic acid, benzoic acid, isophthalic acid, and oxynaphthoic acid. [Component C33] an aldehyde selected from the group consisting of formaldehyde, glyoxylic acid, and benzaldehyde, or mixtures thereof, where the benzaldehyde may further have an acidic group represented by the formula COOMa, SO3Ma, or PO3Ma, where M is H, an alkali metal or alkaline earth metal, ammonium, or an organic amine group, and a may be 1 / 2, 1, or 2;

[0044] When the liquid rheology modifier of the present invention contains a dispersant, the content of the dispersant in the rheology modifier of the present invention is, from the viewpoint of the rheology modifying effect, preferably 1 mass % or more, more preferably 2.5 mass % or more, and preferably 20 mass % or less, more preferably 15 mass % or less, and even more preferably 10 mass % or less.

[0045] The liquid rheology modifier of the present invention may contain other components, such as air-enhancing agents, retarders, early-strength agents, accelerators, foaming agents, foaming agents, defoamers, rust inhibitors, colorants, antifungal agents, crack-reducing agents, expansion agents, dyes, pigments, and the like (excluding the above-mentioned compound (A), solvent (B), and dispersants), so long as the components do not impair the performance of the modifier.

[0046] From the viewpoint of ease of handling, the viscosity of the liquid rheology modifier of the present invention at 20°C is preferably 1 mPa·s or more, more preferably 10 mPa·s or more, even more preferably 100 mPa·s or more, and preferably 2000 mPa·s or less, more preferably 1500 mPa·s or less, even more preferably 1000 mPa·s or less. Here, the viscosity of the liquid rheology modifier is measured using a TVB-10 (B-type viscometer) manufactured by Toki Sangyo Co., Ltd. under conditions of an M1 rotor and 12 rpm.

[0047] The liquid rheology modifier of the present invention is suitable for use in hydraulic slurry compositions. In particular, the liquid rheology modifier of the present invention can be suitably used in grout materials used in grouting for ground improvement methods, columnar continuous walls, injection methods, etc., cement milk for boring, self-leveling materials, lightweight embankments, crack repair materials, lightweight mortar, high-fluidity concrete, fiber-reinforced concrete, pile circumference fixing liquid, underwater embankments, void filling materials, porous concrete, air grout materials, concrete for ECL, PC grout, etc.

[0048] [Hydraulic Slurry Composition] The present invention provides a hydraulic slurry composition comprising the liquid rheology modifier of the present invention, water, and a hydraulic powder. That is, the hydraulic slurry composition of the present invention contains a compound (A), a solvent (B), water, and a hydraulic powder. The matters described in relation to the liquid rheology modifier of the present invention can be appropriately applied to the hydraulic slurry composition of the present invention.

[0049] The hydraulic powder used in the hydraulic slurry composition of the present invention is a powder that hardens when mixed with water, and examples thereof include ordinary Portland cement, high-early-strength Portland cement, ultra-high-early-strength Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, white Portland cement, and ecocement (e.g., JIS R5214, etc.). Among these, from the viewpoint of shortening the time required for the hydraulic slurry composition to reach a required strength, a cement selected from early-early-strength Portland cement, ordinary Portland cement, sulfate-resistant Portland cement, and white Portland cement is preferred, and a cement selected from early-early-strength Portland cement and ordinary Portland cement is more preferred.

[0050] The hydraulic powder may contain blast furnace slag, fly ash, silica fume, anhydrous gypsum, etc., or may contain non-hydraulic limestone fine powder, etc. As the hydraulic powder, blast furnace cement, fly ash cement, or silica fume cement, which is a mixture of cement with blast furnace slag, fly ash, silica fume, etc., may be used. Also, clay such as bentonite may be contained.

[0051] The hydraulic slurry composition of the present invention may contain aggregate. Examples of aggregate include fine aggregate and coarse aggregate, and 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 aggregate is based on "Concrete Overview" (published by Gijutsu Shoin on June 10, 1998).

[0052] The hydraulic slurry composition of the present invention may contain other components other than the compound (A) and the solvent (B) within the range that does not affect the effects of the present invention. For example, the above-mentioned dispersants, AE agents, retarders, foaming agents, thickeners, foaming agents, waterproofing agents, fluidizing agents, antifoaming agents, etc. may be mentioned.

[0053] In the hydraulic slurry composition of the present invention, from the viewpoint of simultaneously suppressing bleeding and achieving low viscosity, the content of the liquid rheology modifier of the present invention is preferably 0.25 parts by mass or more, more preferably 0.5 parts by mass or more, even more preferably 1 part by mass or more, still more preferably 1.5 parts by mass or more, and preferably 7.5 parts by mass or less, more preferably 6 parts by mass or less, even more preferably 5 parts by mass or less, and still more preferably 3 parts by mass or less, relative to 100 parts by mass of water.

[0054] In the hydraulic slurry composition of the present invention, the content of the compound (A) is, from the viewpoint of suppressing bleeding, preferably 0.1 part by mass or more, more preferably 0.3 part by mass or more, even more preferably 0.6 part by mass or more, and preferably 9 parts by mass or less, more preferably 7.2 parts by mass or less, even more preferably 6 parts by mass or less, still more preferably 3 parts by mass or less, still more preferably 1.5 parts by mass or less, and even more preferably 1 part by mass or less, based on 100 parts by mass of water.

[0055] In the hydraulic slurry composition of the present invention, the content of the solvent (B) is, from the viewpoint of solubility in the slurry, preferably 0.05 parts by mass or more, more preferably 0.1 parts by mass or more, even more preferably 0.2 parts by mass or more, even more preferably 0.3 parts by mass or more, even more preferably 0.6 parts by mass or more, and preferably 9 parts by mass or less, more preferably 7.2 parts by mass or less, even more preferably 6 parts by mass or less, still more preferably 3 parts by mass or less, still more preferably 1.5 parts by mass or less, and even more preferably 1 part by mass or less, based on 100 parts by mass of water.

[0056] In the hydraulic slurry composition of the present invention, the mass ratio (B) / (A) of the content of the compound (A) to the content of the solvent (B) is preferably 0.15 or more, more preferably 0.3 or more, even more preferably 1.0 or more, and is preferably 3 or less, more preferably 2 or less, even more preferably 1.5 or less, from the viewpoint of simultaneously suppressing bleeding and achieving low viscosity.

[0057] In the hydraulic slurry composition of the present invention, the mass percentage of the water content and the hydraulic powder content (water / hydraulic powder ratio (W / P)) is preferably 50 mass% or more, more preferably 60 mass% or more, even more preferably 70 mass% or more, and preferably 150 mass% or less, more preferably 125 mass% or less, even more preferably 100 mass% or less, from the viewpoint of achieving both low viscosity and suppression of bleeding. Here, the water / hydraulic powder ratio (W / P) is the mass percentage (mass%) of water and hydraulic powder in the hydraulic slurry composition, and is calculated by water / hydraulic powder x 100. The water / hydraulic powder ratio is calculated based on the amount of powder that has the physical property of hardening by hydration reaction. When the hydraulic powder is cement, W / P may be expressed as W / C. In addition, when the hydraulic powder includes powders selected from powders having pozzolanic action, powders having latent hydraulic properties, and stone powder (calcium carbonate powder) in addition to powders having properties that harden through hydration reactions such as cement, the amounts of these powders are also included in the amount of hydraulic powder in this invention. In addition, when the powder having properties that harden through hydration reactions contains a high-strength admixture, the amount of the high-strength admixture is also included in the amount of hydraulic powder. This also applies to other parts by mass that are related to the mass of the hydraulic powder.

[0058] When the hydraulic slurry composition of the present invention contains the above-mentioned dispersant, the content of the dispersant in the hydraulic slurry composition of the present invention is, from the viewpoint of obtaining fluidity, preferably 0.1 part by mass or more, more preferably 0.15 parts by mass or more, even more preferably 0.2 parts by mass or more, and preferably 2 parts by mass or less, more preferably 1.5 parts by mass or less, and even more preferably 1 part by mass or less, relative to 100 parts by mass of the hydraulic powder.

[0059] The hydraulic slurry composition of the present invention can be suitably used as a grout material used in grouting for ground improvement methods, columnar continuous walls, injection methods, etc., cement milk for drilling, self-leveling materials, lightweight embankments, crack repair materials, lightweight mortar, high-fluidity concrete, fiber-reinforced concrete, pile periphery fixing liquid, underwater embankments, void filling materials, porous concrete, air grout materials, concrete for ECL, PC grout, etc.

[0060] <Method for producing hydraulic slurry composition> The present invention provides a method for producing a hydraulic slurry composition, which comprises mixing the liquid rheology modifier of the present invention, a hydraulic powder, and water. In the method for producing a hydraulic slurry composition of the present invention, the above-mentioned dispersant can be further mixed. To the method for producing the hydraulic slurry composition of the present invention, the matters described in relation to the liquid rheology modifier of the present invention and the hydraulic slurry composition of the present invention can be appropriately applied. In the method for producing the hydraulic slurry composition of the present invention, the mixing amount of the liquid rheology modifier of the present invention relative to 100 parts by mass of water, the mixing amount of the compound (A) relative to 100 parts by mass of water, the mixing amount of the solvent (B) relative to 100 parts by mass of water, the mixing amount of the dispersant relative to 100 parts by mass of water, the mass ratio (B) / (A) of the mixing amount of the compound (A) to the mixing amount of the solvent (B), and the mass percentage of the mixing amount of the water to the mixing amount of the hydraulic powder (water / hydraulic powder ratio (W / P)) can be appropriately applied by replacing the contents of the liquid rheology modifier of the present invention, the contents of each component, and their mass ratios described in the hydraulic slurry composition of the present invention with the mixing amounts of the liquid rheology modifier of the present invention and the contents of each component.

[0061] In the method for producing the hydraulic slurry composition of the present invention, it is preferable to prepare a hydraulic slurry composition containing water and hydraulic powder in advance, add the liquid rheology modifier of the present invention to the hydraulic slurry composition, and mix them to produce the hydraulic slurry composition of the present invention.

[0062] <Plastic grout composition> The hydraulic slurry composition of the present invention is a composition that has low viscosity and can suppress bleeding, and is therefore suitable for use as a plastic grout composition. That is, the present invention provides a plastic grout composition comprising the hydraulic slurry composition of the present invention and a plasticizer. The present invention also provides a plastic grout composition comprising the liquid rheology modifier of the present invention, water, a hydraulic powder, and a plasticizer. The present invention also provides a plastic grout composition comprising a compound (A), a solvent (B), water, a hydraulic powder, and a plasticizer. The plastic grout composition of the present invention may further contain the above-mentioned dispersant. The matters described in relation to the liquid rheology modifier of the present invention, the hydraulic slurry composition of the present invention and the manufacturing method thereof can be appropriately applied to the plastic grout composition of the present invention. In the plastic grout composition of the present invention, the content of the liquid rheology modifier of the present invention per 100 parts by mass of water, the content of compound (A) per 100 parts by mass of water, the content of solvent (B) per 100 parts by mass of water, the content of dispersant per 100 parts by mass of water, the mass ratio (B) / (A) of the content of compound (A) to the content of solvent (B), and the mass percentage of the content of water to the content of hydraulic powder (water / hydraulic powder ratio (W / P)) are the same as those described in the hydraulic slurry composition of the present invention.

[0063] The plasticizer may be one or more selected from water glass, sodium aluminate, aluminum sulfate, and gypsum. From the viewpoints of availability and cost, the plasticizer is preferably one or more selected from water glass and sodium aluminate, and more preferably water glass.

[0064] In the hydraulic slurry composition of the present invention, the content of the plasticizer is, from the viewpoint of gelation time, preferably 2.5 parts by mass or more, more preferably 5 parts by mass or more, even more preferably 7.5 parts by mass or more, and preferably 30 parts by mass or less, more preferably 25 parts by mass or less, even more preferably 20 parts by mass or less, based on 100 parts by mass of the hydraulic powder.

[0065] In the hydraulic slurry composition of the present invention, the volume ratio of the content of the hydraulic slurry composition of the present invention to the content of the plasticizer (hydraulic slurry composition / plasticizer) is, from the viewpoint of gelation time, preferably 5 or more, more preferably 6 or more, even more preferably 7.5 or more, and preferably 40 or less, more preferably 35 or less, even more preferably 30 or less, still more preferably 15 or less, and even more preferably 10 or less.

[0066] <Method of manufacturing plastic grout composition> The present invention provides a method for producing a plastic grout composition, which comprises mixing the hydraulic slurry composition of the present invention and a plasticizer. The present invention also provides a method for producing a plastic grout composition, which comprises mixing the liquid rheology modifier of the present invention, water, a hydraulic powder, and a plasticizer. The present invention also provides a method for producing a plastic grout composition, comprising mixing a compound (A), a solvent (B), water, a hydraulic powder, and a plasticizer. The plastic grout composition of the present invention may further contain the above-mentioned dispersant. The method for producing the plastic grout composition of the present invention can be appropriately applied to the liquid rheology modifier of the present invention, the hydraulic slurry composition of the present invention and the method for producing the same. In the method for producing the plastic grout composition of the present invention, the mixing amount of the liquid rheology modifier of the present invention relative to 100 parts by mass of water, the mixing amount of the compound (A) relative to 100 parts by mass of water, the mixing amount of the solvent (B) relative to 100 parts by mass of water, the mixing amount of the dispersant relative to 100 parts by mass of water, the mass ratio (B) / (A) of the mixing amount of the compound (A) to the mixing amount of the solvent (B), and the mass percentage (water / hydraulic powder ratio (W / C)) of the mixing amount of water to the mixing amount of hydraulic powder can be appropriately applied by replacing the content of the liquid rheology modifier of the present invention, the content of each component, and their mass ratios described in the hydraulic slurry composition of the present invention with the mixing amount of the liquid rheology modifier of the present invention and the content of each component. In addition, in the manufacturing method of the plastic grout composition of the present invention, the amount of plasticizer mixed relative to 100 parts by mass of hydraulic powder, and the mass ratio of the amount of the hydraulic slurry composition of the present invention to the amount of the plasticizer mixed (hydraulic slurry composition / plasticizer) can be appropriately applied by replacing the content of the plasticizer and the content of each component of the present invention with the mixed amount by the content of the plasticizer and the mass ratio (hydraulic slurry composition / plasticizer) described in the plastic grout composition of the present invention. EXAMPLES

[0067] The components used in the examples and comparative examples are shown below. <Compound (A)> Oleyl amide propyl dimethylamine oxide: In the general formula (1), X is R 2a -[CONH-CH2CH2CH2] n -, R 2a is an alkenyl group having 17 carbon atoms, n is 1, and R 2 is a methyl group, R 3 is a methyl group (however, the oleylamidopropyldimethylamine oxide used was prepared by converting oleylamidopropyldimethylamine manufactured by Solvay Co., Ltd. into an amine oxide using hydrogen peroxide), compound (a1), Myristyldimethylamine oxide: In the general formula (1), X is R 1a -, R 1a is an alkyl group having 14 carbon atoms, R 2 is a methyl group, R 3 is a methyl group, compound (a2) Myristylamidopropyldimethylamine oxide: In the general formula (1), X is R 2a -[CONH-CH2CH2CH2] n -, R 2a is an alkenyl group having 13 carbon atoms, n is 1, R 2 is a methyl group, R 3 is a methyl group, compound (a2) Oleyldimethylamine oxide: In the general formula (1), X is R 1a -, R 1a is an alkenyl group having 18 carbon atoms, R 2is a methyl group, R 3 is a methyl group, compound (a2)

[0068] <Solvent (B)> 1.4-Butanediol: SP value 15.0 Propylene glycol: SP value 15.9 Neopentyl glycol: SP value 13.8 1-butanol: SP value 11.3 <Solvent (B') (Comparative components of solvent (B)> Glycerin: SP value 16.5 Ethylene glycol: SP value 17.8 Benzyl alcohol: SP value 9.3

[0069] [Preparation of liquid rheology modifier] Compound (A), solvent (B) or solvent (B'), and water were mixed in the amounts shown in Tables 1 and 2 (effective components, total 100% by mass) to prepare liquid rheology modifiers.

[0070] [Appearance evaluation of liquid rheology modifiers] The appearance of each of the prepared liquid rheology modifiers was visually inspected and evaluated according to the following criteria. The results are shown in Tables 1 and 2. If the liquid rheology modifier is in a gel state, it is not preferred because it is difficult to handle. Pale yellow liquid: A pale yellow, transparent liquid. Gel-like: Non-fluid state.

[0071] [Preparation of hydraulic slurry composition] Water and cement (a 50 / 50 mixture of ordinary Portland cement made by Taiheiyo Cement and Sumitomo Osaka Cement) were mixed to obtain a prescribed water / hydraulic powder ratio, and the mixture was stirred for 30 seconds using a commercially available hand mixer. After that, each liquid rheology modifier listed in Tables 1 and 2 was added, and stirring was continued for 90 seconds after the addition of the liquid rheology modifier to prepare a hydraulic slurry composition. The total amount of the prepared hydraulic slurry was adjusted to 2 L. The total amount of water added to the cement initially and each liquid rheology modifier is considered to be the amount of water. The content of the liquid rheology modifier relative to 100 parts by mass of water was as shown in Tables 1 and 2. The water / hydraulic powder ratio (W / C) (mass %) in each hydraulic slurry composition was as shown in Tables 1 and 2.

[0072] [Evaluation of hydraulic slurry composition] Breeding Evaluation The bleeding rate of each hydraulic slurry composition 3 hours after preparation was calculated according to JSCE-F 522-2007 Test method for bleeding rate and expansion rate of injection mortar for prepacked concrete (polyethylene bag method). The results are shown in Tables 1 and 2. The smaller the bleeding rate value, the more suppressed the bleeding.

[0073] Evaluation of P funnel flow time The flow time of each hydraulic slurry composition through a P funnel immediately after preparation was tested according to the "Test method for fluidity of injection mortar for prepacked concrete" described in the Standard Specifications for Concrete (Criteria Edition) published by the Japan Society of Civil Engineers. The results are shown in Tables 1 and 2. The inner diameter of the outlet of the P funnel is 13 mm. The shorter the flow time, the lower the viscosity is judged to be, and a flow time of 100 seconds or less can be said to be low viscosity and is suitable.

[0074] Method for evaluating gel time Two 2L disposable cups were prepared, and 900L of each hydraulic slurry composition prepared in Table 2 was added to one container, and 100L of No. 3 water glass, a plasticizer, was added to the other container. The hydraulic slurry composition was then gently poured into the disposable cup containing the water glass, and then returned to the disposable cup, and this process was repeated alternately, and the time until the fluidity disappeared was measured as the gelation time. The results are shown in Table 2. The shorter the gelation time, the better the miscibility between the hydraulic slurry composition and the plasticizer, and the more quickly the hydraulic slurry composition can be prevented from escaping. In addition, the composition can be suitably used as a plastic grout composition because it has high filling properties when pressed into the hydraulic slurry composition.

[0075] [Table 1]

[0076] [Table 2]

[0077] In Tables 1 and 2, "(a1) / (A) (mass %)" indicates the content (mass %) of compound (a1) in compound (A). In the table, "modifier added amount (parts by mass)" indicates the content (parts by mass) of liquid rheology modifier relative to 100 parts by mass of water. From Tables 1 and 2, it can be seen that the rheology modifiers of the examples are in a liquid state, have excellent handleability, and can achieve both low viscosity and bleeding inhibition.

Claims

1. A liquid rheology modifier comprising a compound represented by the following general formula (1) [hereinafter referred to as compound (A)], a solvent having an SP value of 10.0 or more and 16.0 or less as measured by the Fedors method [hereinafter referred to as solvent (B)], and water, A liquid rheology modifier, in which the content of oleylamidopropyldimethylamine oxide (hereinafter referred to as compound (a1)) in compound (A) is 80 mass% or more. 【Chemistry 1】 [Wherein, X is R １ａ Or R ２ａ -[CONH-CH ２ CH ２ CH ２ ] ｎ R is a group represented by -. １ａ R is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. ２ａ is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. n is an integer of 1 to 3. ２ and R ３ each independently represents an alkyl group having 1 to 4 carbon atoms or -(C ２ H ４ O) ｐ H. p is the average number of moles added, and R ２ and R ３ The sum of these is a number between 0 and 5.

2. 2. The liquid rheology modifier according to claim 1, wherein the mass ratio (B) / (A) of the content of the compound (A) to the content of the solvent (B) is 0.15 or more and 3 or less.

3. 3. The liquid rheology modifier according to claim 1 or 2, wherein the content of compound (A) is 20% by mass or more and 50% by mass or less.

4. The liquid rheology modifier according to any one of claims 1 to 3, wherein the content of the solvent (B) is 5% by mass or more and 70% by mass or less.

5. The liquid rheology modifier according to any one of claims 1 to 4, wherein the solvent (B) is an alcohol compound having from 2 to 8 carbon atoms.

6. The liquid rheology modifier according to any one of claims 1 to 5, which is for use in a hydraulic slurry composition.

7. A hydraulic slurry composition comprising the liquid rheology modifier according to any one of claims 1 to 6, a hydraulic powder, and water.

8. The hydraulic slurry composition according to claim 7, wherein the mass percentage of the water content and the hydraulic powder content (water / hydraulic powder) is 50 mass% or more and 150 mass% or less.

9. A method for producing a hydraulic slurry composition, comprising mixing the liquid rheology modifier according to any one of claims 1 to 6, a hydraulic powder, and water.

10. A plastic grout composition comprising the hydraulic slurry composition according to claim 7 or 8 and a plasticizer.

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