TW201930227A - Additive for water-curable composition - Google Patents

Abstract

Provided is an additive for a water-curable composition, capable of increasing the strength at an initial material age of a cured body obtained by curing the prepared water-curable composition. An additive for a water-curable composition, used in a water-curable composition including a water-curable binder, wherein the additive for a water-curable composition comprises a dialkanolamine and diethylene glycol.

Description

 Hydraulic composition additive  

The present invention relates to an additive for a hydraulic composition, and more particularly to an additive for a hydraulic composition which can increase the strength of an initial age of a hardened body obtained by curing the prepared hydraulic composition.

The hydraulic composition is obtained by kneading a hydraulic binder with a material such as water, filling the template, hardening the mold, and releasing the template to obtain a hardened body. Among them, the concrete product is made by kneading materials such as cement, water, aggregates, and dispersing agents, and is poured into a formwork to harden and productize. Increasing the strength of the initial material age is related to the fact that more concrete products can be made using the same formwork, and therefore it is required to shorten the time to reach the strength of the mold release after pouring the concrete. For this purpose, various additives have been studied, and inorganic salts such as calcium chloride, nitrite or nitrate have been disclosed (for example, refer to Non-Patent Document 1) or glycerin, alkanolamine, etc. (for example, refer to Patent Document 1. 2).

 [Previous Technical Literature]  

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2009-256201

Patent Document 2: Japanese Laid-Open Patent Publication No. 2011-236127

Non-patent literature

Non-Patent Document 1: You Zeshi, et al., "Development and Latest Technology of Concrete Mixtures", CMC Co., Ltd., 1995

Calcium chloride is limited in its use due to the corrosion of steel in the formation of reinforced concrete, and nitrite or nitrate has a large amount of addition. Alkanolamine or glycerin can also increase the strength of the initial age, but it is required to further increase the strength of the initial age.

The problem to be solved by the present invention is to obtain the strength required for demolding in a shorter period of time without reducing the strength of the hardened body of the hydraulic composition from 1 to 2 weeks of age. That is, the early strength can be improved, for example, at 20 ° C, the compressive strength after 24 hours from the pouring, or the compressive strength after 5 hours under heat curing, etc., to ensure high compressive strength in a short period of time.

As a result of research conducted by the inventors of the present invention to solve the above problems, it has been found that an additive for a hydraulic composition formed of a specific organic compound is suitable. According to the present invention, the following additives for a hydraulic composition can be provided.

[1] An additive for a hydraulic composition, which is an additive for a hydraulic composition comprising a hydraulic composition of a hydraulic binder, which is formed of a dialkanolamine and diethylene glycol.

[2] The additive for a hydraulic composition according to [1], wherein the dialkanolamine is diethanolamine and/or diisopropanolamine.

[3] The additive for a hydraulic composition according to [1] or [2], wherein a mass ratio of the dialkanolamine to the diethylene glycol (dialkylolamine/diethylene glycol) is Within the range of 0.2~100.

[4] The additive for a hydraulic composition according to any one of [1] to [3] further comprising a sulfuric acid and/or a sulfonic acid compound.

[5] The additive for a hydraulic composition according to [4], wherein the sulfonic acid compound is toluenesulfonic acid or methanesulfonic acid.

[6] The additive for a hydraulic composition according to [4] or [5], wherein a molar ratio of the amine of the dialkanolamine to the acid of the sulfuric acid and the sulfonic acid compound (dialkylolamine) The amine/(acid of sulfuric acid and sulfonic acid compound) is in the range of 0.1 to 2.

[7] The additive for a hydraulic composition according to any one of [1] to [6] further comprising a dispersing agent.

The hydraulic composition prepared by using the additive of the present invention hardens and hardens the strength of the initial age of the hardened body, and further has the strength required for demolding in a shorter time without lowering the hardened body. The effect of the strength of the material age of 1~2 weeks.

Embodiments of the present invention will be described below. However, the present invention is not limited to the following embodiments. Therefore, it is to be understood that the following embodiments may be appropriately modified, improved, or the like according to the general knowledge of the practitioner within the scope of the invention. Further, in the following examples and the like, unless otherwise stated, % represents mass%, and parts represent mass parts.

The additive for a hydraulic composition according to the embodiment of the present invention is an additive for a hydraulic composition containing a hydraulic composition of a hydraulic binder, which is a water formed from a dialkanolamine and a diethylene glycol. An additive for a hard composition.

Examples of the dialkanolamine used in the additive for a hydraulic composition of the present embodiment (hereinafter also referred to as an additive of the present embodiment) include diethanolamine, diisopropanolamine, N-alkyldiethanolamine, and N. An alkyldiisopropanolamine, of which diethanolamine and diisopropanolamine are preferred.

The amount of the dialkanolamine used in the additive of the present embodiment is preferably 0.01 to 1 part by mass, more preferably 0.02 to 0.8 part by mass, per 100 parts by mass of the hydraulic binder such as cement.

As the diethylene glycol used in the additive of the present embodiment, a commercially available industrial product can be used.

The amount of the diethylene glycol used in the additive of the present embodiment is preferably 0.001 to 1 part by mass, more preferably 0.002 to 0.5 part by mass, per 100 parts by mass of the hydraulic binder such as cement. If the amount of diethylene glycol used is too small, there is no effect, and if too much, the compressive strength of the material age of about 1 to 4 weeks is lowered.

The mass ratio of the dialkanolamine to diethylene glycol (dialkylolamine/diethylene glycol) is preferably in the range of 0.2 to 100, more preferably in the range of 1 to 50.

The additive of the present embodiment preferably further contains a sulfuric acid and/or a sulfonic acid compound. Examples of the sulfonic acid compound include p-toluenesulfonic acid, methanesulfonic acid, benzenesulfonic acid, and dodecylbenzenesulfonic acid. Among them, preferred is selected from the group consisting of sulfuric acid, p-toluenesulfonic acid In the present specification, the case of "A and/or B" means both "A and B" and "A or B". Therefore, the additive of the present embodiment may further contain sulfuric acid, may further contain a sulfonic acid compound, and may further contain sulfuric acid and a sulfonic acid compound.

The combination of a dialkanolamine with a sulfuric acid and/or a sulfonic acid compound means that the dialkanolamine is neutralized with a sulfuric acid and/or a sulfonic acid compound. The molar ratio of the dialkanolamine to the acid of the sulfuric acid and the sulfonic acid compound is not particularly limited. However, the molar ratio of the amine of the dialkanolamine to the acid of the sulfuric acid and the sulfonic acid compound (amine of the dialkanolamine / acid of the sulfuric acid and the sulfonic acid compound) is preferably 0.1 to 2, more preferably 0.5. ~1.5.

The additive of the present embodiment preferably further contains a dispersant. Examples of such a dispersing agent include a dispersing agent such as an aromatic sulfonic acid dispersing agent such as a naphthalene dispersing agent, a phenol dispersing agent, or a lignin dispersing agent, a polycarboxylic acid dispersing agent, and a phosphate dispersing agent. . In particular, the dispersant is preferably an aromatic sulfonic acid dispersant or a polycarboxylic acid dispersant such as a naphthalene dispersant or a melamine dispersant, and more preferably a naphthalene system, from the viewpoint of ensuring early strength. A dispersant and a polycarboxylic acid dispersant.

As the naphthalene-based dispersant, a naphthalenesulfonic acid formaldehyde condensate (MIGHTY 150 (trade name) manufactured by Kao Co., Ltd., POLEFINE 510-AN (trade name) manufactured by Takeshi Oil Co., Ltd.), or the like can be used. As the melamine-based dispersant, a melamine sulfonic acid formaldehyde condensate (POLEFINE Mf (trade name) manufactured by Takemoto Oil Co., Ltd., Access Ried 100 (trade name) manufactured by Nissan Chemical Industries, Ltd.), or the like can be used. As the phenol-based dispersant, a phenolsulfonic acid formaldehyde condensate (a compound described in JP-A-46-104919) and a phenol phosphate formaldehyde condensate (a compound described in JP-A-2012-504695) can be used. Wait. As the lignin-based dispersing agent, a lignosulfonate (SANX (trade name), VANILLEX (trade name), PEARLLEX (trade name), etc., manufactured by Nippon Paper Chemical Co., Ltd.) can be used.

As the polycarboxylic acid copolymer, a copolymer of a polyalkylene glycol and a monoester of (meth)acrylic acid and a carboxylic acid such as (meth)acrylic acid; and an unsaturated group having a polyolefin-based diol can be used. A copolymer of an alcohol and a carboxylic acid such as (meth)acrylic acid (for example, JP-A-2007-119337); a copolymer of an unsaturated alcohol having a polyolefin-based diol and a dicarboxylic acid such as maleic acid. Further, (meth)acrylic acid means acrylic acid or methacrylic acid.

As the polycarboxylic acid-based copolymer, a copolymer obtained by polymerizing a monomer represented by the following formula (1) and a carboxylic acid monomer can be used.

R ¹ -OXR ² (1)

In the formula (1), R ¹ represents an alkenyl group having 2 to 5 carbon atoms or an unsaturated fluorenyl group having 3 or 4 carbon atoms.

R ² represents a hydrogen atom, an alkyl group having 1 to 22 carbon atoms or an aliphatic fluorenyl group having 1 to 22 carbon atoms.

X represents a (poly)oxyalkylene group having an average addition molar number of from 1 to 300, which is composed of an oxygen alkyl group having 2 to 4 carbon atoms.

Examples of the alkenyl group having 2 to 5 carbon atoms of R ¹ in the formula (1) include a vinyl group, an allyl group, a methallyl group, a 3-butenyl group, and a 2-methyl-1-butene group. A group, a 3-methyl-1-butenyl group, a 2-methyl-3-butenyl group, a 3-methyl-3-butenyl group, and the like. Further, examples of the unsaturated fluorenyl group having 3 or 4 carbon atoms of R ¹ include an acryloyl group and a methacryl fluorenyl group. Among these, an allyl group, a methallyl group, a 3-methyl-1-butenyl group, an acryloyl group, and a methacryl group are preferable. One or two or more of the monomers represented by the formula (1) may be used.

Examples of R ² in the formula (1) include 1) a hydrogen atom, 2) an alkyl group having 1 to 22 carbon atoms, and 3) an aliphatic fluorenyl group having 1 to 22 carbon atoms.

The X in the formula (1) includes a polyoxyalkylene group composed of 1 to 300 (poly)oxyalkylene units. Among them, a (poly)oxyalkylene group composed of 1 to 160 oxyethylene units and/or oxypropylene units is preferred.

The carboxylic acid monomer constituting the above (co)polymer has: (meth)acrylic acid, crotonic acid, dicarboxylic acid, maleic acid, itaconic acid, fumaric acid, succinic acid mono(2-(A) And pyridyloxyethyl) esters and the like. Among them, preferred are (meth)acrylic acid, maleic acid, (meth)acrylic acid salt, and maleic acid salt.

Examples of the salt of the carboxylic acid monomer include an alkali metal salt such as a sodium salt or a potassium salt, an alkaline earth metal salt such as a calcium salt or a magnesium salt, an amine salt such as an ammonium salt, a diethanolamine salt or a triethanolamine salt.

In the production of the above (copolymer) polymer, other monomers capable of copolymerization such as styrene, acrylamide, (meth)allylsulfonic acid (salt) and the like may be used in combination.

The additive of this embodiment is used in the preparation of a hydraulic composition. For example, it can be used when preparing a hydraulic composition using a hydraulic binder containing cement, water, fine aggregate, coarse aggregate, AE agent or the like.

Examples of the hydraulic binder include cement, blast furnace stone fine powder, fly ash, and ash. Among them, those containing cement are preferred. As the cement, in addition to various Portland cements such as ordinary Portland cement, early-strength Portland cement, and medium-heat Portland cement, various mixed cements such as blast furnace cement, fly ash cement, and ash cement can be used.

Further, as the fine aggregate, conventional river sand, mountain sand, sea sand, crushed sand, ore sand, and the like can be used. Further, as the coarse aggregate, conventional river gravel, crushed stone, lightweight aggregate, and the like can be used.

Further, in the preparation of the hydraulic composition, 1) an air amount regulator such as rosin soap, alkyl aromatic sulfonate, aliphatic alkyl (ether) sulfate or alkyl phosphate; 2) dimethyl An antifoaming agent such as a polyoxyalkylene-based, a polyolefin-based diol fatty acid ester, a mineral oil, a fat or oil, an alkyloxy group, an alcohol or a guanamine.

When the additive of the present embodiment is used, a coagulant, a retarder, a rust preventive, a water repellent, or the like can be used in combination within the target range. Further, the method of using the additive of the present embodiment may be any one of a method of adding a concrete composition together with the mixing water, a method of adding the concrete composition immediately after the mixing, and the like.

The additive of the present embodiment is preferably a single-liquid type multifunctional additive in which various components are previously mixed.

In the step of filling the template with the hydraulic composition of the additive of the present embodiment and curing it, the obtained hydraulic composition is filled in a template and cured. Examples of the template include a formwork for a building and a formwork for a concrete product. Examples of the method of filling the hydraulic composition into the template include a method of directly inputting from a mixer, a method of introducing a template by pumping a hydraulic composition, and the like.

Heat curing can be performed to promote hardening of the hydraulic composition. The heat-curing composition is maintained at a temperature of 40 ° C or more and 80 ° C or less to perform heat curing.

Example

Hereinafter, the examples and the like are exemplified in order to make the configuration and effects of the present invention more specific, but the present invention is not limited to the examples. Further, in the following examples and the like, unless otherwise stated, % represents mass%, and parts represent mass parts.

Preparation of additives for hydraulic compositions (Examples 1 to 14):

A dialkanolamine, diethylene glycol (DEG), ion-exchanged water, or the like was blended in a ratio shown in Table 1 to prepare an aqueous solution of an additive for a hydraulic composition.

In Table 1, the following terms mean the following:

DEA: Diethanolamine.

DIPA: Diisopropanolamine.

DEG: Diethylene glycol.

MSA: methanesulfonic acid.

PTS: p-toluenesulfonic acid. monohydrate.

TEA: Triethanolamine (reagent).

TIPA: Triisopropanolamine (reagent).

A/B: mass ratio of dialkanolamine/diethylene glycol.

A/C: molar ratio of the amine of the dialkanolamine / (the acid of the sulfuric acid and the sulfonic acid compound).

The mass average molecular weight of the copolymer (dispersant) obtained by polymerization shown in the following examples was measured by a gel permeation chromatography.

Measuring condition

Device: Shodex GPC-101 (made by Showa Denko).

Column: OHpak SB-G+SB-806M HQ+SB-806M HQ (manufactured by Showa Denko).

Detector: differential refractometer (RI).

Lysis solution: 50 mM aqueous solution of sodium nitrate.

Flow rate: 0.7 mL/min.

Column temperature: 40 ° C.

Sample concentration: a solution concentration of 0.5% by weight of the solution solution.

Standard materials: polyethylene oxide, polyethylene glycol.

Production of dispersant (PC-1):

First, 165.5 g of ion-exchanged water, 133.4 g of α-methacryl fluorenyl-ω-methoxy-poly(n=45) oxyethylene, 22.2 g of methacrylic acid, and 1.6 g of 3-mercaptopropionic acid were placed. A reaction vessel (hereinafter, the same container) of a thermometer, a stirrer, a dropping funnel, and a nitrogen introduction tube was stirred and uniformly dissolved. Thereafter, the gas atmosphere of the reaction system in which the above components were dissolved was subjected to nitrogen substitution, and the temperature of the reaction system was 65 ° C in a water bath. Next, 27.3 g of 1.0% hydrogen peroxide water was added, and after maintaining at 65 ° C for 6 hours, the polymerization reaction was terminated. Thereafter, a 30% aqueous sodium hydroxide solution was added to adjust to pH 6, and the concentration was adjusted to 40% with ion-exchanged water to obtain a reaction mixture. The mass average molecular weight of the obtained reaction mixture was measured and found to be 35,000. This reaction mixture was used as a dispersing agent (PC-1).

Production of dispersant (PC-2):

41.4 g of ion-exchanged water was placed in a reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, and a nitrogen introduction tube, and the gas atmosphere was replaced with nitrogen while stirring, and the temperature of the reaction system was 70 ° C in a warm water bath. It took 3 hours to drip 188.0 g of α-methacryloyl-ω-methoxy-poly(n=130)oxyethylene, 12.0 g of methacrylic acid, 2.0 g of sodium methallylsulfonate, 3-mercapto 4.0 g of propionic acid was dissolved in an aqueous solution of 188.0 g of ion-exchanged water. At the same time, an aqueous solution obtained by dissolving 3.0 g of ammonium sulfate in 26.0 g of ion-exchanged water was dropped for 4 hours, and then maintained at 70 ° C for 1 hour to complete the polymerization reaction. Thereafter, a 30% aqueous sodium hydroxide solution was added to adjust to pH 6, and the concentration was adjusted to 40% with ion-exchanged water to obtain a reaction mixture. The mass average molecular weight of the obtained reaction mixture was measured and found to be 45,000. This reaction mixture was used as a dispersing agent (PC-2).

Production of dispersant (PC-3):

72.0 g of ion-exchanged water was placed in a reaction vessel equipped with a thermometer, a stirrer, a dropping funnel, and a nitrogen introduction tube, and the gas atmosphere was replaced with nitrogen, and the temperature of the reaction system was 70 ° C in a warm water bath. Then, 147.7 g of α-methacryloyl-ω-hydroxy-oxypropylene poly(n=68)oxyethylene, 135.0 g of ion-exchanged water, 16.4 g of methacrylic acid, and 1.0 g of mercaptoethanol were dissolved by dropping for 3 hours. An aqueous solution. At the same time, an aqueous solution obtained by dissolving 2.5 g of sodium persulfate in 22.9 g of ion-exchanged water was dropped over 4 hours. Thereafter, the reaction was terminated by maintaining at 70 ° C for 1 hour. Thereafter, a 30% aqueous sodium hydroxide solution was added to adjust to pH 6, and the concentration was adjusted to 40% with ion-exchanged water to obtain a reaction mixture. The mass average molecular weight of the obtained reaction mixture was measured and found to be 50,000. This reaction mixture was used as a dispersing agent (PC-3).

Production of dispersant (PC-4):

117.0 g of ion-exchanged water and 98.2 g of α-(3-methyl-3-butenyl)-ω-hydroxy-poly(n=53)oxyethylene were placed in a thermometer, a stirrer, a dropping funnel, and a nitrogen introduction tube. The reaction vessel was stirred to be uniformly dissolved. Thereafter, the gas atmosphere of the reaction system in which the above components were dissolved was subjected to nitrogen substitution, and the temperature of the reaction system was 70 ° C in a warm water bath. Then, 7.9 g of 3.5% hydrogen peroxide water was dropped for 3 hours, and at the same time, an aqueous solution obtained by dissolving 9.5 g of acrylic acid in 47.2 g of ion-exchanged water was dropped for 3 hours, and at the same time, it took 4 hours to drip ascorbic acid 0.6. An aqueous solution of g and 3-mercaptopropionic acid 0.6 g dissolved in 5.0 g of ion-exchanged water. Thereafter, the mixture was maintained at 70 ° C for 2 hours to terminate the polymerization reaction. Thereafter, a 30% aqueous sodium hydroxide solution was added to adjust to pH 6, and the concentration was adjusted to 40% with ion-exchanged water to obtain a reaction mixture. The mass average molecular weight of the obtained reaction mixture was measured and found to be 46,000. This reaction mixture was used as a dispersing agent (PC-4).

Preparation of hydraulic composition (Examples 15 to 28 and Comparative Examples 1 to 6):

The hydraulic composition was prepared by the following method. Ordinary Portland cement (Pacific Cement Company, Ube Mitsubishi Cement Co., Ltd., Sumitomo Osaka Cement Co., Ltd., three brands of the same amount, specific gravity = 3.16), fine aggregate (Dajing River water system sand, specific gravity = 2.58) and coarse aggregate (Okasaki gravel, specific gravity = 2.66) A 55-liter forced biaxial mixer was sequentially placed in the ratio shown in Table 2, and dry mixing was carried out for 10 seconds. After that, the dispersing agent and the antifoaming agent (AFK-2 manufactured by Takemoto Oil & Fats Co., Ltd.) were used as the dispersing agent and the amount of the antifoaming agent in an amount of 0.005% or less with respect to the amount of the air. Name)) Adding the mixing water, the above dispersing agent and defoaming agent are regarded as a part of the mixing water, and are put together with the mixing water, and mixed for 90 seconds. The results are summarized in Table 3.

Twist: For the hydraulic composition immediately after mixing, it is measured in accordance with JIS-A1150.

Air volume: For the concrete composition immediately after mixing, it was measured in accordance with JIS-A1128.

Compressive strength: According to JIS-A1132, a template for forming a sample of three cylindrical tinplates (product name "SUMMIT MOLD", Sumitomo Corporation, diameter of the bottom of the template: 100 mm, height of the template: 200 mm) The concrete is filled in a double-layer filling manner. Thereafter, air (20 ° C) was cured in a room at 20 ° C to harden the concrete. After 24 hours from the preparation of the concrete, the hardened test piece was released from the template to obtain a test piece. The 24-hour strength of the test piece was measured in accordance with JIS-A1108, and the average value of the three test pieces was determined. Further, another test piece was produced in the same manner as above, and after demolding in the same manner, it was cured in water at 20 ° C for 14 days, and the 14-day strength of the test piece was measured in accordance with JIS-A1108, and three samples were obtained. The average value of the test body.

Heat curing and compression strength: According to JIS-A1132, a template for forming a test piece of concrete made of three cylindrical tinplates (product name "SUMMIT MOLD", Sumitomo Corporation, diameter of the bottom of the template: 100 mm, height of the template: 200 mm) In the middle, the concrete is filled in a double-layer filling manner. Thereafter, the upper portion of the filled concrete was made uniform and covered with a polyethylene cling film. The test piece was air-conditioned (20 ° C) for 2 hours from the pouring, and then transferred to an incubator which was previously warmed to 65 ° C and then cured for 3 hours. After the predetermined curing time, the hardened test piece is released from the template to obtain a test object. The 5-hour intensity of the test piece was measured in accordance with JIS-A1108, and the average value of the three test pieces was determined. The results are shown in Table 3.

In Table 3, the following terms mean the following meanings. In addition, the description of the terms shown in Table 1 will be omitted. Further, in Comparative Examples 2 to 6, each additive was directly used as a reagent.

Addition rate: the addition rate (%) relative to the cement in the original state.

NA: Naphthalenesulfonic acid formaldehyde condensate (POLEFINE 510-AN (trade name) manufactured by Takemoto Oil Co., Ltd., concentration: 40%).

Result

It was confirmed that in Examples 15 to 28, by using an additive containing a dialkanolamine and a diethylene glycol, the 24-hour strength, the 14-day strength, and the 5-hour strength were higher than those of Comparative Examples 1 to 6. value.

Industrial utilization possibility

The additive for a hydraulic composition of the present invention can be used as an additive in the preparation of a hydraulic composition.

Claims (16)

 An additive for a hydraulic composition, which is an additive for a hydraulic composition comprising a hydraulic composition of a hydraulic binder, which is formed of a dialkanolamine and diethylene glycol.    The additive for a hydraulic composition of claim 1, wherein the dialkanolamine is diethanolamine and/or diisopropanolamine.    The additive for a hydraulic composition according to claim 1, wherein the mass ratio of the dialkanolamine to the diethylene glycol (dialkylolamine/diethylene glycol) is in the range of 0.2 to 100.    The additive for a hydraulic composition according to claim 2, wherein the mass ratio of the dialkanolamine to the diethylene glycol (dialkylolamine/diethylene glycol) is in the range of 0.2 to 100.    The additive for a hydraulic composition of claim 1, which further contains a sulfuric acid and/or a sulfonic acid compound.    The additive for a hydraulic composition of claim 2, which further contains a sulfuric acid and/or a sulfonic acid compound.    The additive for a hydraulic composition of claim 5, wherein the sulfonic acid compound is toluenesulfonic acid or methanesulfonic acid.    The additive for a hydraulic composition of claim 6, wherein the sulfonic acid compound is toluenesulfonic acid or methanesulfonic acid.    An additive for a hydraulic composition according to claim 5, wherein a molar ratio of the amine of the dialkanolamine to the acid of the sulfuric acid and the sulfonic acid compound (amine of a dialkanolamine/(sulfuric acid and a sulfonic acid compound) The acid)) is in the range of 0.1 to 2.    The additive for a hydraulic composition of claim 6, wherein the amine of the dialkanolamine is compared with the molar ratio of the sulfuric acid and the acid of the sulfonic acid compound (amine of a dialkanolamine / (sulfuric acid and a sulfonic acid compound) The acid)) is in the range of 0.1 to 2.    The additive for a hydraulic composition according to claim 7, wherein the amine of the dialkanolamine is compared with the molar ratio of the sulfuric acid and the acid of the sulfonic acid compound (amine of a dialkanolamine / (sulfuric acid and a sulfonic acid compound) The acid)) is in the range of 0.1 to 2.    The additive for a hydraulic composition of claim 8, wherein the amine of the dialkanolamine is compared with the molar ratio of the sulfuric acid and the acid of the sulfonic acid compound (amine of a dialkanolamine / (sulfuric acid and a sulfonic acid compound) The acid)) is in the range of 0.1 to 2.    The additive for a hydraulic composition of claim 1, which further contains a dispersing agent.    The additive for a hydraulic composition of claim 2, which further contains a dispersing agent.    The additive for a hydraulic composition of claim 5, which further contains a dispersing agent.    The additive for a hydraulic composition of claim 6, which further contains a dispersing agent.