WO2018147266A1 - Dispersant composition for hydraulic composition - Google Patents

Abstract

The present invention is a dispersant composition for a hydraulic composition, the dispersant composition containing a polymeric compound (A) which has aromatic ring–containing monomer units, a polymer (B) which has carboxylic acid group–containing monomer units, and a sugar compound (C) which has a molecular weight of 1,000 or less.

Description

Dispersant composition for hydraulic composition

The present invention relates to a dispersant composition for a hydraulic composition and a grout method or a fluidized earth method.

Background Art One of the foundation pile construction methods for constructing foundation piles is a pre-boring root hardening method. This is because the soil is excavated to a predetermined depth (support layer) with the auger while injecting the drilling fluid, then the root hardening fluid is injected into the excavation tip, and then the pile circumference fixing fluid is injected while pulling up the auger, Is built in this excavation hole, fixed in the root-setting liquid by press-fitting or light hitting, and the pile and the ground are integrated by hardening the root-setting liquid and the pile circumference fixing liquid. The pre-boring root hardening method is also called a cement milk method because cement milk is generally used as a root hardening liquid or a pile circumference fixing liquid. Moreover, the soil cement which mixed excavated soil and cement milk may be used as a pile circumference fixing liquid. Japanese Patent Application Laid-Open Nos. 2005-54437, 2014-114600, and 2014-125788 disclose techniques related to construction of foundation piles.

JP 2000-143315 A discloses a polymer or copolymer obtained by polymerizing one or more monomers selected from the group consisting of (a) an unsaturated monocarboxylic acid and an unsaturated dicarboxylic acid. And (b) oxycarboxylic acid or a salt thereof, and one or more compounds selected from the group consisting of sugars and sugar alcohols in a weight ratio of (A) / (B) = 97/3 to 20 / The additive for hydraulic compositions excellent in the deviscousness of the hydraulic composition containing clay is contained at a ratio of 80.

JP-A-2-48450 discloses a cement admixture containing a predetermined water-insoluble polymer and / or a predetermined water-insoluble metal complex and a water-soluble polymer having a hydroxyl group in a predetermined ratio. Has been.

SUMMARY OF THE INVENTION The present invention relates to a dispersant for a hydraulic composition that can maintain the fluidity of a hydraulic composition that is a kneaded product of hydraulic powder such as cement milk and can suppress the thickening of soil cement. A composition is provided.

The present invention includes a polymer compound (A) having a monomer unit containing an aromatic ring (hereinafter referred to as “component (A)”), a polymer having a monomer unit having a carboxylic acid group (B) [hereinafter referred to as “component (B)”. And a sugar composition (C) having a molecular weight of 1,000 or less (hereinafter referred to as component (C)).

The present invention also relates to a grout method or a fluidized earth method using the dispersant composition for a hydraulic composition of the present invention.

The present invention also relates to a ground improvement method in which the hydraulic composition containing the dispersant composition for a hydraulic composition of the present invention is stirred and mixed with the ground.

The present invention also relates to a method for producing a hydraulic composition in which water, hydraulic powder, component (A), component (B), and component (C) are mixed.

According to the present invention, there is provided a dispersant composition for a hydraulic composition capable of maintaining the fluidity of cement milk and suppressing the thickening of soil cement.

DETAILED DESCRIPTION OF THE INVENTION A polymer having a monomer unit having a carboxylic acid group, such as sodium polyacrylate, imparts a negative charge by adsorbing to clay particles, and exhibits dispersibility by electrostatic repulsion. It is considered a thing. On the other hand, it is known that sugar compounds such as saccharose can impart a set retarding property to cement. Because of these effects, the polymer or sugar compound is used as an additive for soil cement.
However, sodium polyacrylate also acts on cement, and when it is added in a large amount, false condensation (gelation) occurs in a hydraulic composition such as cement milk. For this reason, in the construction method in which cement milk is prepared and then mixed and stirred with the ground soil, there arises a problem that such an additive cannot be added in a large amount.
The present inventors have made improvements by paying attention to such false condensation (gelation). Pseudo-congealing was thought to be due to the relatively rapid hydration of aluminate minerals. Therefore, a polymer compound having a monomer unit containing an aromatic ring and showing high adsorptivity to the aluminate mineral was added and evaluated. As a result, it was found that false condensation (gelation) when using sodium polyacrylate was suppressed. Some polymer compounds having a monomer unit containing an aromatic ring are used as a dispersant in a hydraulic composition, but in the present invention, in combination with the component (B) and the component (C), This has the unexpected effect of maintaining both the fluidity of cement milk and the suppression of thickening of soil cement.

<Dispersant composition for hydraulic composition>
[Component (A)]
The component (A) is a polymer compound having a monomer unit containing an aromatic ring.
Examples of the aromatic ring include a benzene ring, a naphthalene ring, an anthracene ring, and a triazine ring. Examples of the monomer unit containing an aromatic ring include one or more monomer units selected from a monomer unit containing a benzene ring, a monomer unit containing a naphthalene ring, and a monomer unit containing a triazine ring.

The component (A) preferably has a weight average molecular weight of 1,000 or more and 100,000 or less. This molecular weight measurement method varies depending on the polymer compound.

The content of the monomer unit containing an aromatic ring in the total monomer units of the component (A) is preferably 50 mol% or more, more preferably from the viewpoint of suppression of cement milk thickening and the suppression of thickening of soil cement. Is 51 mol% or more, more preferably 60 mol% or more, more preferably 70 mol% or more, still more preferably 80 mol% or more, still more preferably 90 mol% or more.
Here, the “monomer unit” means a “repeating unit” in the polymer compound. For example, in the case of sodium naphthalene sulfonate formalin condensate, a “repeat unit” such as the following formula is called a monomer unit. In the following formula, n represents the number of repeating units.

In addition, the content of the monomer unit having a carboxylic acid group in the total monomer units of the component (A) is preferably less than 50 mol% from the viewpoint of suppressing the increase in cement milk viscosity and suppressing the increase in viscosity of the soil cement. More preferably, it is less than 40 mol%, More preferably, it is less than 30 mol%, More preferably, it is less than 20 mol%, More preferably, it is less than 10 mol%.

(A) As a component, 1 or more types of compounds chosen from naphthalenesulfonic acid formaldehyde condensate, lignin sulfonic acid, melamine sulfonic acid formaldehyde condensate, and those salts are mentioned.

The component (A) is preferably a polymer compound having a monomer unit containing a naphthalene ring from the viewpoint of suppressing false condensation.
As the component (A), naphthalenesulfonic acid formaldehyde condensate or a salt thereof is more preferable. The naphthalenesulfonic acid formaldehyde condensate or a salt thereof is a condensate of naphthalenesulfonic acid and formaldehyde or a salt thereof. The naphthalenesulfonic acid formaldehyde condensate may be used as a monomer, for example, methyl naphthalene, ethyl naphthalene, butyl naphthalene, hydroxy naphthalene, naphthalene carboxylic acid, anthracene, phenol, cresol, creosote oil, tar, melamine, as long as the performance is not impaired. It may be co-condensed with an aromatic compound capable of co-condensing with naphthalenesulfonic acid, such as urea, sulfanilic acid and / or derivatives thereof.

Naphthalene sulfonic acid formaldehyde condensate or salt thereof may be, for example, Mighty 150, Demol N, Demol RN, Demol MS, Demol SN-B, Demol SS-L (all manufactured by Kao Corporation), Cellflow 120, Labelin FD-40 Commercial products such as Labelin FM-45 (both manufactured by Daiichi Kogyo Co., Ltd.) can be used.

The naphthalene sulfonic acid formaldehyde condensate or salt thereof has a weight average molecular weight of preferably 100,000 or less, more preferably 80,000 or less, and still more preferably 50,000 or less, from the viewpoint of suppressing thickening of cement milk. More preferably, it is 30,000 or less, More preferably, it is 20,000 or less, More preferably, it is 15,000 or less. The naphthalenesulfonic acid formaldehyde condensate or salt thereof has a weight average molecular weight of preferably 1,000 or more, more preferably 3,000 or more, still more preferably 4,000 or more, from the viewpoint of improving cement dispersibility. More preferably, it is 5,000 or more. The naphthalene sulfonic acid formaldehyde condensate may be in the acid state or neutralized.

The molecular weight of naphthalenesulfonic acid formaldehyde condensate or a salt thereof can be measured using gel permeation chromatography (GPC) under the following conditions.
[GPC conditions]
Column: G4000SWXL + G2000SWXL (Tosoh Corporation)
Eluent: 30 mM CH ₃ COONa / CH ₃ CN = 6/4
Flow rate: 0.7ml / min
Detection: UV280nm
Sample size: 0.2 mg / ml
Standard substance: Nishio Kogyo Co., Ltd. polystyrene sulfonate conversion (monodisperse sodium polystyrene sulfonate: molecular weight, 206, 1,800, 4,000, 8,000, 18,000, 35,000, 88,000, 780,000)
Detector: Tosoh Corporation UV-8020

Examples of the method for producing a naphthalenesulfonic acid formaldehyde condensate or a salt thereof include a method of obtaining a condensate by a condensation reaction of naphthalenesulfonic acid and formaldehyde. You may neutralize the said condensate. Moreover, you may remove the water insoluble matter byproduced by neutralization. Specifically, in order to obtain naphthalenesulfonic acid, 1.2 to 1.4 mol of sulfuric acid is used with respect to 1 mol of naphthalene and reacted at 150 to 165 ° C. for 2 to 5 hours to obtain a sulfonated product. Next, formalin is added dropwise at 85 to 95 ° C. over 3 to 6 hours to form 0.95 to 0.99 mol of formaldehyde with respect to 1 mol of the sulfonated product, and then condensed at 95 to 105 ° C. Perform the reaction. Further, since the aqueous solution of the resulting condensate has a high acidity, water and a neutralizing agent are added to the obtained condensate from the viewpoint of suppressing metal corrosion in storage tanks, and a neutralization step is performed at 80 to 95 ° C. be able to. The neutralizing agent is preferably added in an amount of 1.0 to 1.1 moles per naphthalenesulfonic acid and unreacted sulfuric acid. Moreover, the water-insoluble matter which arises by neutralization can be removed, and preferably the separation by filtration is mentioned as the method. By these steps, an aqueous solution of a naphthalenesulfonic acid formaldehyde condensate water-soluble salt is obtained. This aqueous solution can be used as it is as the aqueous solution of the component (A). Further, if necessary, the aqueous solution can be dried and powdered to obtain a powdery salt of naphthalenesulfonic acid formaldehyde condensate, which can be used as the powdery component (A).
Drying and powdering can be performed by spray drying, drum drying, freeze drying, or the like.

(A) As a component, 1 or more types of compounds chosen from lignin sulfonic acid, a melamine sulfonic-acid formaldehyde condensate, and those salts are mentioned.

The lignin sulfonic acid or a salt thereof is a lignin that is partially sulfonated with sulfurous acid or a salt thereof or a salt thereof. Examples of the salt include alkali metal salts, alkaline earth metal salts, ammonium salts, and amine salts, and alkali metal salts such as sodium salts and potassium salts are preferable. Moreover, what refine | purified the reducing saccharides contained in these by ultrafiltration is preferable from the hardening delay reduced.

Lignin sulfonic acid or a salt thereof is a polymer compound obtained by derivatizing lignin extracted from wood. Lignin sulfonic acid or a salt thereof is known as a dispersant for a hydraulic composition containing hydraulic powder such as cement or gypsum.

Lignin sulfonic acid or a salt thereof may contain a decomposition product of lignin, a by-product upon sulfonation, or the like as long as performance is not impaired.

As the lignin sulfonic acid or a salt thereof, for example, commercially available products such as Master Pozoris # 70, Master Pozoris # 72 manufactured by BASF, Sun Extract 252 manufactured by Nippon Paper Industries Co., Ltd., Plastocrete NC manufactured by Nihon Sika Co., Ltd. are used. be able to.

A melamine sulfonic acid formaldehyde condensate or a salt thereof is obtained by reacting N-methylol melamine obtained by reacting melamine with formaldehyde to react bisulfite to sulfomethylate a part of methylol group, and then add an acid to form methylol group. Is a known compound obtained by dehydrating and condensing to formaldehyde condensate and neutralizing with alkali (see, for example, Japanese Patent Publication No. Sho 63-37058). Examples of the alkali include hydroxides of alkali metals or alkaline earth metals, ammonia, mono, di, trialkyl (2 to 8 carbon atoms) amine, mono, di, trialkanol (2 to 8 carbon atoms) amine, and the like. be able to.

As commercial products, Mighty 150V-2 (manufactured by Kao Corporation), SMF-PG (Nissan Chemical Industry Co., Ltd.), Melflow (Mitsui Chemicals Co., Ltd.), Melment F-10 (manufactured by Showa Denko KK), Super Melamine (manufactured by Nissan Chemical Co., Ltd.), Floric MS (manufactured by Floric), Melment F4000, Melment F10M, Melment F245 (all manufactured by BASF Japan) and the like.

The molecular weight of the melamine sulfonic acid formaldehyde condensate is preferably 1,000 or more, more preferably 3,000 or more, still more preferably 5,000 or more, and preferably 100,000 or less, more preferably 50,000 or less, More preferably, it is 20,000 or less (gel permeation chromatography method, converted to polystyrene sulfonic acid).

[(B) component]
The component (B) is a polymer having a monomer unit having a carboxylic acid group. Here, “monomer unit” means “repeating unit” in the polymer. For example, in the case of sodium polyacrylate, a “repeating unit” represented by the following formula is called a monomer unit. In the following formula, m represents the number of repeating units.

Examples of the monomer having a carboxylic acid group include unsaturated monocarboxylic acids such as acrylic acid and methacrylic acid, and unsaturated dicarboxylic acids such as maleic acid, fumaric acid, and itaconic acid.
Examples of the component (B) include polyacrylic acid, polymethacrylic acid, acrylic acid / maleic acid copolymers, and salts thereof. Examples of the salt include alkali metal salts, alkaline earth metal salts, ammonium salts, and alkyl ammonium salts.
The component (B) is preferably polyacrylic acid or a salt thereof, and more preferably a polymer selected from a sodium salt of polyacrylic acid and an ammonium salt of polyacrylic acid.

The polymer of the component (B) can have a degree of neutralization of 0% to 75%. That is, the component (B) may be an unneutralized or partially neutralized polymer. In the case of a partially neutralized polymer, the degree of neutralization is preferably 10% or more, more preferably 20% or more, and preferably 60% or less, more preferably 40% or less.

In addition, the content of the monomer unit having a carboxylic acid group in the total monomer units of the component (B) is preferably 50 mol% or more from the viewpoint of suppressing the increase in the viscosity of cement milk and suppressing the increase in the viscosity of the soil cement. More preferably, it is 51 mol% or more, More preferably, it is 60 mol% or more, More preferably, it is 70 mol% or more, More preferably, it is 80 mol% or more, More preferably, it is 90 mol% or more.

The polymer of component (B) can be produced by a known method. Moreover, it is available as a commercial item. Specific examples of commercially available products include the Poise Series (Kao Corporation), Aquaric L Series (Nippon Shokubai Co., Ltd.), Aquaric H Series (Nihon Shokubai Co., Ltd.), Jurimer Series (Toagosei Co., Ltd.), Aron Series (Toa Gosei Co., Ltd.).

The weight average molecular weight of the component (B) is preferably 2,000 or more, more preferably 4,000 or more, still more preferably 6,000 or more, and preferably 1,000,000 or less, more preferably 100,000. Hereinafter, it is more preferably 50,000 or less. The weight average molecular weight of the component (B) can be measured using gel permeation chromatography (GPC) under the following conditions.
[GPC conditions]
Column: G4000PWXL + G2500PWXL (manufactured by Tosoh Corporation),
Eluent: 0.2M phosphate buffer / acetonitrile = 7/3 (volume ratio)
Reference material: monodisperse polyethylene glycol of known molecular weight

[Component (C)]
Component (C) is a sugar compound having a molecular weight of 1,000 or less. The component (C) is preferably a saccharide compound having a molecular weight of 700 or less, more preferably 500 or less. The component (C) is preferably one or more sugar compounds selected from monosaccharides, disaccharides and trisaccharides.
Examples of the sugar compound as component (C) include one or more compounds selected from sugars and sugar alcohols. Examples of the saccharide include monosaccharides such as glucose, fructose, galactose, and mannose, disaccharides such as saccharose, and trisaccharides. The saccharide is preferably a compound selected from monosaccharides and disaccharides, more preferably disaccharides. Examples of the sugar alcohol include sorbitol.
Component (C) is preferably one or more compounds selected from saccharose, glucose, maltose, and lactose, more preferably one or more compounds selected from saccharose, glucose, maltose, and lactose, and from sucrose and glucose. One or more selected compounds are more preferred, and sucrose is even more preferred. The dispersant composition for hydraulic composition of the present invention preferably contains sucrose as the component (C).

[Composition, optional components, etc.]
From the viewpoint of improving the stability of cement milk, the dispersant composition for hydraulic composition of the present invention has a total content of (A) component, (B) component and (C) component of 100% by mass ( The component A) is preferably 1% by mass or more, more preferably 3% by mass or more, still more preferably 5% by mass or more, and preferably 60% by mass or less, more preferably 40% by mass or less, still more preferably 20% by mass. % Or less.

From the viewpoint of suppressing thickening of the soil cement, the dispersant composition for a hydraulic composition of the present invention has a total content of the component (A), the component (B) and the component (C) as 100% by mass ( The component B) is preferably 30% by mass or more, more preferably 40% by mass or more, further preferably 50% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less, still more preferably 70% by mass. % Or less.

The dispersant composition for a hydraulic composition according to the present invention has the component (C) as the total content of the component (A), the component (B), and the component (C) as 100% by mass from the viewpoint of curing delay. , Preferably 3% by mass or more, more preferably 5% by mass or more, further preferably 10% by mass or more, and preferably 60% by mass or less, more preferably 45% by mass or less, still more preferably 30% by mass or less. .

The dispersant composition for a hydraulic composition according to the present invention is a total of component (A), component (B), and component (C), preferably 10% by mass or more, more preferably 20% by mass or more, and still more preferably. Is 30% by mass or more, and preferably 90% by mass or less, more preferably 70% by mass or less, and still more preferably 50% by mass or less. This composition is, for example, a concentrated system or a concentrated system used by diluting the dispersant composition of the present invention when the concentrations of the components (A), (B) and (C) are relatively high. Of the dispersant composition of the present invention.
Further, the dispersant composition for a hydraulic composition of the present invention comprises (A) component, (B) component, and (C) component in total, preferably 0.5% by mass or more, more preferably 1% by mass. More preferably, it is 1.5% by mass or more, and preferably 10% by mass or less, more preferably 7% by mass or less, still more preferably 5% by mass or less, and still more preferably 2% by mass or less. This composition is used when the concentration of the component (A), the component (B) and the component (C) in the composition, such as a dilute composition or kneaded water, is relatively low. The dilution of the agent composition is shown.

In the dispersant composition for hydraulic composition of the present invention, the mass ratio of the component (A) to the component (B) is (A) / (B), preferably 0, from the viewpoint of suppressing the thickening of the soil cement. 0.01 or more, more preferably 0.05 or more, still more preferably 0.1 or more, and preferably 1.5 or less, more preferably 1 or less, still more preferably 0.5 or less.

In the dispersant composition for a hydraulic composition of the present invention, the mass ratio of the component (B) to the component (C) is (B) / (C), preferably 0, from the viewpoint of suppressing the thickening of the soil cement. 0.5 or more, more preferably 1 or more, further preferably 1.5 or more, and preferably 10 or less, more preferably 6 or less, still more preferably 4 or less, still more preferably 2.5 or less.

The dispersant composition for a hydraulic composition of the present invention preferably has a pH at 22 ° C. of 7.5 or less from the viewpoint of suppressing false setting of cement milk. The pH is more preferably 7 or less, still more preferably 6.9 or less, and is preferably 2 or more, more preferably 3 or more, still more preferably 4 or more, and even more preferably 5 or more.
Here, when the dispersant composition for a hydraulic composition of the present invention is a liquid, the pH is the pH of the composition itself. Further, when the dispersant composition for a hydraulic composition of the present invention is solid, the pH is such that the total content of the component (A), the component (B), and the component (C) is 1 % By mass to 50% by mass, preferably 1% by mass to 30% by mass, more preferably 1% by mass to 10% by mass, more preferably 1% by mass to 5% by mass, and even more preferably 1% by mass or more. It is the pH of the liquid composition obtained by diluting with water to 3% by mass or less, more preferably 2% by mass. In the case where there is a range in the total content, the pH may be at least in any mass% of the range.

In addition, the dispersant composition for hydraulic composition of the present invention is used at a pH of 7.5 or less from the viewpoint of suppressing false setting of cement milk. Specifically, the pH containing water is 7.5 or less. The liquid composition is preferably used for the preparation of a hydraulic composition. The pH is more preferably 7 or less, still more preferably 6.9 or less, and is preferably 2 or more, more preferably 3 or more, still more preferably 4 or more, and even more preferably 5 or more.
In general, the dispersant composition for hydraulic composition of the present invention is used as kneaded water diluted with water. The pH of the kneaded water is preferably 7.5 or less at 22 ° C. If the pH of the composition before dilution is 7.5 or less at 22 ° C., the pH of the kneaded water is usually 7.5 or less at 22 ° C.
As an example of the present invention, water, (A) component, (B) component and (C) component are contained, and the total content of (A) component, (B) component and (C) component is preferably 0.5. % By mass or more, more preferably 1% by mass or more, further preferably 1.5% by mass or more, and preferably 10% by mass or less, more preferably 7% by mass or less, still more preferably 5% by mass or less, and still more preferably. Is 2% by mass or less, and the pH at 22 ° C. is preferably 7.5 or less, more preferably 7 or less, still more preferably 6.9 or less, and preferably 2 or more, more preferably 3 or more, still more preferably Is a dispersant composition for hydraulic compositions, which is 4 or more, more preferably 5 or more. This composition can be used as kneaded water as it is or with any additive added.
The pH can be adjusted to the above range by adjusting the liquidity of the dispersant composition for a hydraulic composition as a stock solution with an acid. The acid is an acid other than the component (A) and the component (B). The acid here has a molecular weight relatively smaller than that of the component (A) or the component (B). The acid is preferably an acid having a molecular weight of less than 1,000. As the acid, an organic acid or an inorganic acid can be used, and an acid that hardly affects the hydration of the hydraulic powder is preferable. Preferred acids are acids selected from organic acids other than oxycarboxylic acids and inorganic acids. The organic acid preferably has a carboxylic acid group, and more preferably an organic acid having 1 to 5 carboxylic acid groups per molecule from the viewpoint of preventing cement gelation. Examples of the organic acid include organic acids selected from citric acid, gluconic acid, tartaric acid, acetic acid, and formic acid. Examples of the inorganic acid include inorganic acids selected from sulfuric acid, hydrochloric acid, and nitric acid.

The dispersant composition for hydraulic composition of the present invention has a pH at 22 ° C. of preferably 7.5 or less, even if the amount of the dispersant composition for hydraulic composition of the present invention is increased, The false condensation (gelation) of the hydraulic composition can be suppressed. It is believed that the false setting (gelation) of the hydraulic composition is caused by early abnormal hydration. By making the pH of the dispersant composition for a hydraulic composition of the present invention close to an acid in advance, a rapid increase in pH immediately after water contact can be suppressed, and the progress of hydration can be controlled. It is thought that false condensation (gelation) due to can be suppressed. When the amount of the dispersant composition for a hydraulic composition of the present invention is large, the pH of the kneaded water is preferably adjusted to 7.5 or less to advantageously achieve both the fluidity of cement milk and the suppression of thickening of the soil cement. it can.
When the amount of component (A) and component (B) added to the hydraulic powder is large, or when the working environment is high temperature (slurry temperature 25 ° C. or higher), the fluidity of cement milk tends to decrease. In such a case, the fluidity | liquidity fall of cement milk can be suppressed by making pH of 22 degreeC of the dispersing agent composition for hydraulic compositions of this invention into 7.5 or less.

The dispersant composition for a hydraulic composition of the present invention preferably contains an antifoaming agent (D) [hereinafter referred to as component (D)] from the viewpoint of strength development.
The component (D) is preferably polysiloxane, polyoxyethylene polyoxypropylene, polypropylene oxide and derivatives thereof (polyoxypropylene, polyoxypropylene glyceryl ether, etc.), acetylene glycol and derivatives thereof (from the viewpoint of defoaming properties) Acetylene glycol, alkylene oxide adducts of acetylene glycol, etc.), polyoxyalkylene fatty acid esters, polyoxyalkylene alkyl ethers, polyoxyalkylene alkylamides, trialkyl phosphates, alkylamines, and alcohols. It is a compound of this. More preferably, these compounds are compounds insoluble in water.

Polysiloxane includes polysiloxane, dimethylpolysiloxane, polyhydroxymethylsiloxane and the like.

Examples of the polyoxyethylene polyoxypropylene include polyoxyethylene polyoxypropylene random polymer, polypropylene oxide-polyethylene oxide-polypropylene oxide block polymer, and the like. From the viewpoint of defoaming properties, these weight average molecular weights are preferably 2,000 or more and 100,000 or less.

Polypropylene oxide and its derivatives include polyoxypropylene glyceryl ether, polyoxypropylene and the like. The weight average molecular weight of these polypropylene oxide portions is preferably 2,000 or more and 100,000 or less from the viewpoint of defoaming properties.

Examples of acetylene glycol and its derivatives include acetylenol E00, acetylenol E13 (all are Kawaken Fine Chemical Co., Ltd.), DYNOL (registered trademark) 604, SURFYNOL (registered trademark) 440, SURFYNOL (registered trademark) 104, and SURFYNOL (registered trademark). 2502, SURFYNOL (registered trademark) 420, SURFYNOL (registered trademark) DF-75 (all of which are Air Products and Chemicals). Examples of the acetylene glycol derivative include an alkylene oxide adduct of acetylene glycol. From the viewpoint of defoaming properties, the average added mole number of alkylene oxide is preferably 1 or more and 100 or less. The alkylene oxide is preferably propylene oxide.

Examples of polyoxyalkylene fatty acid esters include alkylene oxide adducts of fatty acids having 4 to 22 carbon atoms. From the viewpoint of defoaming properties, the average added mole number of alkylene oxide is preferably 1 or more and 100 or less. From the same viewpoint, the alkylene oxide preferably contains propylene oxide.

Examples of polyoxyalkylene alkyl ethers include alkylene oxide adducts of alcohols having 4 to 22 carbon atoms. From the viewpoint of defoaming properties, the average added mole number of alkylene oxide is preferably 1 or more and 100 or less. From the same viewpoint, the alkylene oxide is preferably propylene oxide. Specific examples include polypropylene glycol lauryl ether, polypropylene glycol myristyl ether, and mixtures thereof.

Examples of polyoxyalkylene alkylamides include alkylene oxide adducts of amides of fatty acids having 8 to 22 carbon atoms and amines such as monoethanolamine and diethanolamine. From the viewpoint of defoaming properties, the average added mole number of alkylene oxide is preferably 1 or more and 100 or less. From the same viewpoint, the alkylene oxide is preferably propylene oxide.

Examples of the trialkyl phosphate include tributyl phosphate and triisobutyl phosphate. From the viewpoint of defoaming properties, the alkyl group preferably has 1 to 5 carbon atoms.

Examples of the alkylamine include monoalkylamine, dialkylamine, and trialkylamine. From the viewpoint of poor water solubility and antifoaming properties, monomethylalkylamines having an alkyl group with 8 to 18 carbon atoms and dimethylalkylamines with an alkyl group having 8 to 18 carbon atoms are preferred. Alkylamines include caprylamine (octylamine), laurylamine, stearylamine, coconutamine, distearylamine, dimethyloctylamine, dimethyldecylamine, dimethyllaurylamine, dimethylbehenylamine, dimethylcoconutamine, dimethylmyristylamine , Dimethyl palmitylamine, dimethyl stearylamine, dilauryl monomethylamine, beef tallow amine, and trioctylamine.

Examples of the alcohol include alcohols having 4 to 22 carbon atoms, preferably monohydric alcohols having 4 to 22 carbon atoms. From the viewpoint of defoaming properties, the alcohol has preferably 6 to 18 carbon atoms.

Suitable examples of antifoaming agents include SAGTEX DSA (trademark) as polysiloxane, and polypropylene glycol lauryl ether, polypropylene glycol myristyl ether as polyoxyalkylene fatty acid ester, polyoxyalkylene alkyl ether, or polyoxyalkylene alkylamide. And mixtures thereof, propylene oxide / ethylene oxide adduct of oleic acid, SN deformer 260 (trademark), SN deformer 265 (trademark), SN deformer 466 (trademark) (both are San Nopco Co., Ltd.), antifoaming agent NO. 21 (trademark), antifoaming agent NO. 8 (trademark) (both Kao Corporation) as acetylene glycol, DYNOL (trademark) 604, SURFYNOL (registered trademark) 440 as trialkyl phosphate, tributyl phosphate, triisobutyl phosphate as alcohol, 2-ethylhexanol as polyoxyethylene polyoxypropylene, New Pole PE-61 (trademark), New Pole PE-71 (trademark) (both from Sanyo Chemical Co., Ltd.), and polyoxypropylene as molecular weight 2 Polypropylene glycol of from 1,000 to 100,000.

The antifoaming agent is preferably a polyoxyalkylene fatty acid ester, a polyoxyalkylene alkyl ether, or a polyoxyalkylene alkyl amide from the viewpoint of storage stability, and polypropylene glycol lauryl ether, polypropylene glycol myristyl ether, and a mixture thereof. , Propylene oxide / ethylene oxide adduct of oleic acid, SN deformer 260 (trademark), SN deformer 265 (trademark), SN deformer 466 (trademark), antifoaming agent NO. 21 (trademark), antifoaming agent NO. 8 (trademark) is acetylene glycol, DYNOL (trademark) 604, SURFYNOL (registered trademark) 440 is trialkyl phosphate, tributyl phosphate, triisobutyl phosphate, alcohol is 2-ethylhexanol, poly Examples of the oxyethylene polyoxypropylene include Newpol PE-61 (trademark) and Newpole PE-71 (trademark), and examples of the polyoxypropylene include polypropylene glycol having a molecular weight of 2,000 to 100,000.

Further, from the viewpoint of economy, the antifoaming agent is preferably polysiloxane, DK Q1-1183 (trademark) is SN, polyoxyalkylene fatty acid ester, polyoxyalkylene alkyl ether, or polyoxyalkylene alkylamide as SN. Deformer 260 (trademark), SN deformer 265 (trademark), SN deformer 466 (trademark), antifoaming agent NO. 21 (trademark), antifoaming agent NO. 8 (trademark) is trialkyl phosphate, tributyl phosphate, triisobutyl phosphate is alcohol, 2-ethylhexanol is polyoxyethylene polyoxypropylene, Newpol PE-61 (trademark), Newpol Examples of PE-71 (trademark) and polyoxypropylene include polypropylene glycol having a molecular weight of 2,000 to 100,000.

In the dispersant composition for a hydraulic composition of the present invention, it is preferable that the antifoaming agent of component (D) contains one or more compounds selected from fatty acid esters and alkylamines.
Among the antifoaming agents, alkylamine is preferable from the viewpoint of storage stability of the dispersant composition of the present invention, dimethylalkylamine having an alkyl group having 8 to 18 carbon atoms is more preferable, and dimethyldecylamine. More preferred is one or more alkylamines selected from dimethyllaurylamine, dimethylmyristylamine, and dimethylpalmitylamine.

When the dispersant composition for hydraulic compositions of the present invention contains the component (D), the content of the component (D) in the composition is preferably 0.001% by mass or more, more preferably 0.01. It is contained in an amount of not less than mass%, preferably not more than 3 mass%, more preferably not more than 1 mass%.
Moreover, when the dispersing agent composition for hydraulic compositions of this invention contains (D) component, (D) with respect to the sum total of content of (A) component, (B) component, and (C) component. The component is contained in an amount of preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and preferably 3% by mass or less, more preferably 1% by mass or less.

The dispersant composition for a hydraulic composition of the present invention includes a conventional cement dispersant, a water-soluble polymer compound, an air entraining agent, a cement wetting agent, an expanding material, a waterproofing agent, a retarding agent, a quick setting agent, and a thickening agent. , A coagulant, a drying shrinkage reducing agent, a strength enhancer, a curing accelerator, a preservative, and the like (excluding those corresponding to the component (A), the component (B), or the component (C)) it can.

The form of the dispersant composition for a hydraulic composition of the present invention may be either liquid or solid, and is preferably liquid. The dispersant composition for hydraulic compositions of the present invention can contain water.

Examples of the hydraulic composition targeted by the dispersant composition for hydraulic composition of the present invention include a hydraulic composition containing hydraulic powder and water. The hydraulic powder is a powder having physical properties that hardens by a hydration reaction, and examples thereof include cement and gypsum. Cement is preferred, and more preferred is ordinary portland cement, belite cement, medium heat cement, early strength cement, very early strength cement, sulfate resistant cement, and the like. Also, blast furnace slag cement, fly ash cement, silica fume cement, etc. in which pozzolanic action and / or latent hydraulic properties such as blast furnace slag, fly ash, silica fume, and stone powder (calcium carbonate powder) are added to cement, etc. But you can.

The dispersant composition for a hydraulic composition of the present invention has a water / hydraulic powder ratio of preferably 30% by mass or more, more preferably 40% by mass or more, still more preferably 50% by mass or more, and preferably It is suitably used for a hydraulic composition of 150% by mass or less, more preferably 120% by mass or less, and still more preferably 80% by mass or less.

Here, the water / hydraulic powder ratio is the mass percentage (mass%) of water and hydraulic powder in the hydraulic composition, and is calculated by the mass of water / mass of hydraulic powder × 100. . The water / hydraulic powder ratio is calculated based on the amount of water and the amount of powder having physical properties that are cured by a hydration reaction. In the case where the powder having physical properties that hardens by a hydration reaction includes a powder having a pozzolanic action, a powder having a latent hydraulic property, and a powder selected from stone powder (calcium carbonate powder), The amount is also included in the amount of hydraulic powder. In addition, when the powder having physical properties that hardens by a hydration reaction contains a high-strength admixture, the amount of the high-strength admixture is also included in the amount of the hydraulic powder. The same applies to the following mass parts related to the mass of the hydraulic powder.

The dispersant composition for hydraulic composition of the present invention is suitable for cement milk. The cement milk has a water / hydraulic powder ratio of preferably 30% by mass or more, more preferably 40% by mass or more, still more preferably 50% by mass or more, and preferably 150% by mass or less, more preferably 120% by mass. Hereinafter, it is more preferably 80% by mass or less.

The dispersant composition for a hydraulic composition of the present invention is suitable for a construction method using a waste liquid, specifically, a grout construction method or a fluidized earth method.
Examples of the hydraulic composition targeted by the dispersant composition for a hydraulic composition of the present invention include a grout method or a cement composition for a fluidized earth method.

<Hydraulic composition>
The present invention includes a hydraulic powder, water, a polymer compound (A) [(A) component] having a monomer unit containing an aromatic ring, and a polymer (B) [(B) having a monomer unit having a carboxylic acid group. Component] and a sugar composition (C) having a molecular weight of 1,000 or less (component (C)) are provided. Cement milk is one example of the hydraulic composition of the present invention.
Specific examples and preferred embodiments of the component (A), the component (B), the component (C), and the hydraulic powder are the same as those of the dispersant composition for a hydraulic composition of the present invention. Moreover, the specific example and preferable aspect of water / hydraulic powder ratio are also the same as the dispersing agent composition for hydraulic compositions of this invention. Moreover, the hydraulic composition of this invention can contain (D) component.

The fluidity of the hydraulic composition of the present invention is maintained. And even if clay, such as soil, is mixed, an increase in viscosity can be suppressed. Utilizing such characteristics, it can be suitably used for applications such as ground improvement.
For example, the hydraulic composition of the present invention is suitable for a pile circumference fixing liquid. The hydraulic composition of the present invention can be used as it is or as a soil cement mixed with excavated soil, as a pile circumference fixing solution or a root hardening solution in foundation pile construction.

In the hydraulic composition of the present invention, the total of the component (A), the component (B) and the component (C) is preferably 0.1% by mass or more, more preferably 0.4%, based on the hydraulic powder. More than mass%, and preferably 2.0 mass% or less, More preferably, it contains 1.2 mass% or less.

In the hydraulic composition of the present invention, the component (A) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and preferably 0.6% by mass with respect to the hydraulic powder. % Or less, more preferably 0.3% by mass or less.

In the hydraulic composition of the present invention, the component (B) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and preferably 1% by mass or less, based on the hydraulic powder. More preferably, the content is 0.6% by mass or less.

In the hydraulic composition of the present invention, the component (C) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and preferably 0.6% by mass with respect to the hydraulic powder. % Or less, more preferably 0.3% by mass or less.

In the hydraulic composition of the present invention, the mass ratio of the component (A) to the component (B) is (A) / (B), preferably 0.01 or more, from the viewpoint of suppressing the thickening of the soil cement. Preferably it is 0.05 or more, More preferably, it is 0.1 or more, Preferably it is 1.5 or less, More preferably, it is 1 or less, More preferably, it is 0.5 or less.

The hydraulic composition of the present invention is preferably prepared using the dispersant composition for hydraulic composition of the present invention. The hydraulic composition of the present invention is prepared by mixing water, (A) component, (B) component, and (C) kneaded water having a pH of 7.5 or less with hydraulic powder. Is preferred. The kneaded water is also included in the dispersant composition of the present invention as long as the requirements of the dispersant composition of the present invention are satisfied.

ADVANTAGE OF THE INVENTION By this invention, the manufacturing method of a hydraulic composition which mixes the liquid composition containing water, (A) component, (B) component, and (C) component with hydraulic powder is provided. In this method, the total of component (A), component (B) and component (C) is preferably 0.1% by weight or more, more preferably 0.4% by weight or more with respect to the hydraulic powder, and , Preferably 2.0% by mass or less, more preferably 1.2% by mass or less.
In addition, according to the present invention, there is provided a method for producing a hydraulic composition, wherein a liquid composition containing water, the component (A), the component (B) and the component (C) is mixed with a hydraulic powder. ) Component, (B) component and (C) component in total, based on the hydraulic powder, 0.1% by mass or more, preferably 0.4% by mass or more, and 2.0% by mass or less, preferably Is provided with a method for producing a hydraulic composition in which 1.2% by mass or less is mixed. In this method, the pH of the liquid composition is preferably 7.5 or less, more preferably 7 or less, further preferably 6.9 or less, and preferably 2 or more, more preferably 3 or more, and still more preferably 4 More preferably, it is 5 or more.
The liquid composition in these production methods is kneaded water, and is also a dispersant composition for a hydraulic composition of the present invention.

When the dispersant composition for a hydraulic composition of the present invention is a powder, a premix for a hydraulic composition containing the powder dispersant composition for a hydraulic composition of the present invention and a hydraulic powder. Can be provided.

<Method using the dispersant composition of the present invention>
According to the present invention, there is provided a grout method or a fluidized earth method using the dispersant composition for a hydraulic composition of the present invention.
The grout method is a soft ground that builds pillars and walls in the ground while sending the hydraulic composition into the ground as a high-pressure jet jet fluid, scraping the surrounding earth and sand and discharging it as ground mud. It is an improved construction method. In addition, the fluidized earth method is a method in which soil discharged during construction or civil engineering is mixed with cement and backfilled for reuse.

According to the present invention, there is provided an improved ground method for mixing a hydraulic composition containing the dispersant composition for a hydraulic composition of the present invention with the ground. The hydraulic composition and the ground can be mixed with stirring.
Specific examples of the ground improvement method include shallow layer improvement and deep layer improvement. For these shallow and deep layer improvements, you can refer to the “Ground Improvement Manual 3rd Edition” (Cement Association). More specifically, the improvement method of the ground includes the “embedding method of ready-made concrete piles”, and further, the water of the present invention is applied to the pile root consolidation part and the pile circumference part of the “pre-boring method” and “nakabori method”. A hard composition is used. For steel pipe piles, “steel pipe soil cement pile method” can be cited in addition to the above method. In addition, “TRD method”, “SMW method”, “power blender method”, etc. can be cited as mechanical agitation methods that do not use ready-made piles. The ground improvement method of the present invention is a method of mixing the ground and a hydraulic composition containing the dispersant composition for a hydraulic composition of the present invention in these methods. The mixing amount of the hydraulic composition can be appropriately determined in consideration of the composition of the hydraulic composition, the construction method, the soil quality, the target strength, and the like. For example, the mixing amount of the hydraulic composition with respect to 1 m ^{3 of} soil can be 100 kg or more and 1,000 kg or less.

As an example of the ground improvement method of the present invention, a pre-boring root consolidation using a hydraulic composition containing the dispersant composition for a hydraulic composition of the present invention as a pile circumference fixing liquid and / or a root consolidation liquid. A construction method is mentioned. More specifically, a liquid composition having a pH of 7.5 or less containing water, the component (A), the component (B) and the component (C) is mixed with a hydraulic powder to prepare a hydraulic composition, There is a pre-boring root hardening method in which the obtained hydraulic composition is used as a pile circumference fixing liquid and / or a root hardening liquid.

Example <Compounding ingredients>
Table 1 shows the components used in the following Examples and Comparative Examples. The C′-1 dextrin had a molecular weight greater than 1,000.

<Examples 1 and 2 and Comparative Examples 1 and 2>
Using the components in Table 1, the evaluation for cement milk and soil cement was performed as follows. The results are shown in Tables 2-3.

(1) Cement milk evaluation method (1-1) Preparation of cement milk Mixing the ingredients shown in Table 1 and water to prepare a dispersant aqueous solution, and in a 2L plastic cup (2L disposable cup, Nikko Hansen Co., Ltd.) Cement milk was prepared by mixing with cement and kneading with a hand mixer for 1 minute. At that time, the temperature of each material, water, and each component, and the room temperature were all set to 22 ° C.
As the cement, ordinary cement was used. Water for preparing the dispersant aqueous solution was tap water. The cement and the dispersant aqueous solution were used so that the dispersant aqueous solution / cement was 60%.
The aqueous dispersant / cement substantially corresponds to a water / hydraulic powder ratio.
The components (A), (B), and (C) in Table 1 were used so that the amounts added to the cement were as shown in Tables 2-3. The component (C ′) is a comparative compound of the component (C), but is regarded as the component (C) for convenience, and indicates a mass ratio and mass% (the same applies hereinafter).
In Tables 2 to 3, as component (D), antifoaming agent No. 21 mass% was added with respect to the total amount (Equivalent component conversion) of (A) component, (B) component, and (C) component.

(1-2) Evaluation After the preparation of cement milk, the cement milk was stirred at 200 rpm for 30 minutes with a mechanical stirrer (manufactured by ASONE Co., Ltd., Tornado Standard) at every elapsed time shown in the table. In the mechanical stirrer, a stirring blade FUT-100 for Tornado manufactured by ASONE Co., Ltd. was used as a stirring blade, and a stirring shaft S-500 manufactured by ASONE Co., Ltd. was used as a stirring rod.
After completion of the stirring, the appearance of the cement milk was observed, whether or not a gelled layer was formed was confirmed, and the thickness of the gelled layer and the height of the fluidized layer (flowable layer) were measured with a ruler. When the height of the liquid surface from the bottom of the cup is A, the height of the fluidized bed is B, and the thickness of the gelled layer is C, A = B + C. The fluidity (%) was determined by B / A × 100 and shown in the table. The flow rate is preferably as close to 100%. Elapsed time represents the time since cement and water first contacted.

(2) Method for evaluating soil cement (2-1) Preparation of soil cement First, cement milk was prepared by the following procedure. Mix the ingredients in Table 1 and water to prepare an aqueous dispersant solution, mix with cement in a 500 ml plastic cup (500 ml disposable cup, Nikko Hansen Co., Ltd.), knead with a hand mixer for 1 minute, and cement milk Was prepared. At that time, the temperature of each material, water, and each component, and the room temperature were all set to 22 ° C.
As the cement, ordinary cement was used. Water for preparing the dispersant aqueous solution was tap water. The cement and the dispersant aqueous solution were used so that the dispersant aqueous solution / cement was 60% by mass. The aqueous dispersant / cement substantially corresponds to a water / hydraulic powder ratio.
The components (A), (B), and (C) in Table 1 were used so that the amounts added to the cement were as shown in Tables 2-3.
In Tables 2 to 3, as component (D), antifoaming agent No. 21 mass% was added with respect to the total amount (Equivalent component conversion) of (A) component, (B) component, and (C) component.
Thereafter, muddy water and cement milk were put into another 500 ml plastic cup, and stirred for 30 seconds with a hand mixer to prepare a soil cement. As the muddy water, Kasaoka clay (adjusted to a specific gravity of 1.5 by adding water) was used. The muddy water and cement milk were used at a mass ratio of muddy water / cement milk = 240/70. After stirring, the top surface was leveled by applying vibration, sealed with a wrap film, and allowed to stand at 22 ° C. for a predetermined time.

(2-2) Evaluation 2, 3, and 4 hours after the preparation of the soil cement, the viscosity of the soil cement was evaluated by measuring the torque with a vane shear tester. A vane shear tester manufactured by Tesco was used. The vane (blade) used was 15 mm × 30 mm, and the torque driver used was FTD5CN-S, FTD20CN-S, FTD50CN2-S.

* 1 The mass ratio is a mass ratio where the sum of the component (A), the component (B) and the component (C) is 100 (the same applies hereinafter).
* 2 The mass% of component (D) is mass% relative to the total of component (A), component (B) and component (C) (the same applies hereinafter).
* 3 The addition amount of (A) + (B) + (C) is mass% with respect to cement (the same applies hereinafter).

<Example 3 and Comparative Example 3>
Cement milk and soil cement were prepared using the components in Table 1 as shown in Table 4, and the same evaluation as in Example 1 was performed. The results are shown in Table 4. In preparing the aqueous dispersant solution, the pH was adjusted as shown in Table 4 using the acids shown in Table 5 (shown as the component (E)).

* 4 The mass% of the component (E) is the mass% in the aqueous dispersant solution.

<Example 4>
Cement milk and soil cement were prepared using the components in Table 1 as shown in Table 6, and the same evaluation as in Example 1 was performed. The results are shown in Table 6. The component (B) was used by adjusting the neutralization degree as shown in Table 6 using sodium hydroxide.

<Example 5>
The component of Table 1 and water were mixed, and the dispersing agent composition for hydraulic compositions which contains 40 mass% of (A) component, (B) component, and (C) component in total with the composition of Table 7 was prepared. . In Table 7, as a component (D), 0.4 mass% of D-2 Pharmin DM2098 was added to the total amount (converted to the effective component) of the components (A), (B) and (C). . Acetic acid was added to adjust the pH of the 2% by weight aqueous solution of the dispersant composition for hydraulic composition to 6 to 7 at 22 ° C. The composition was stored at 40 ° C. for 1 day or 7 days, and the appearance was visually observed. The results are shown in Table 7.

Claims (14)

1. Hydraulic composition comprising a polymer compound (A) having a monomer unit containing an aromatic ring, a polymer (B) having a monomer unit having a carboxylic acid group, and a sugar compound (C) having a molecular weight of 1,000 or less Dispersant composition for physical use.
2. The weight average molecular weight of the polymer compound (A) is 1,000 or more and 100,000 or less, and the weight average molecular weight of the polymer (B) is 2,000 or more and 1,000,000 or less. Dispersant composition for hydraulic composition as described in 2.
3. The dispersant composition for hydraulic composition according to claim 1 or 2, wherein the polymer compound (A) comprises a naphthalenesulfonic acid formaldehyde condensate or a salt thereof.
4. The dispersant composition for a hydraulic composition according to any one of claims 1 to 3, wherein the polymer (B) contains polyacrylic acid or a salt thereof.
5. The dispersant composition for a hydraulic composition according to any one of claims 1 to 4, wherein the sugar compound (C) comprises saccharose.
6. The dispersant composition for a hydraulic composition according to any one of claims 1 to 5, wherein the pH at 22 ° C is 7.5 or less.
7. The dispersant composition for a hydraulic composition according to any one of claims 1 to 6, further comprising an antifoaming agent (D).
8. The dispersant composition for a hydraulic composition according to claim 7, wherein the antifoaming agent (D) comprises one or more compounds selected from fatty acid esters and alkylamines.
9. The dispersant composition for a hydraulic composition according to any one of claims 1 to 8, wherein the hydraulic composition is a cement composition for a grout method or a fluidized earth method.
10. A grout method or a fluidized earth method using the dispersant composition for a hydraulic composition according to any one of claims 1 to 9.
11. A ground improvement construction method in which a hydraulic composition containing the dispersant composition for a hydraulic composition according to any one of claims 1 to 9 is mixed with the ground.
12. Water, hydraulic powder, polymer compound (A) having a monomer unit containing an aromatic ring, polymer (B) having a monomer unit having a carboxylic acid group, and sugar compound (C) having a molecular weight of 1,000 or less The manufacturing method of the hydraulic composition which mixes.
13. Liquid composition containing water, a polymer compound (A) having a monomer unit containing an aromatic ring, a polymer (B) having a monomer unit having a carboxylic acid group, and a sugar compound (C) having a molecular weight of 1,000 or less The manufacturing method of the hydraulic composition of Claim 12 which mixes a thing with hydraulic powder.
14. The method for producing a hydraulic composition according to claim 13, wherein the pH of the liquid composition at 22 ° C is 7.5 or less.