JP5155766B2 - Hydraulic composition - Google Patents

Description

  The present invention relates to a hydraulic composition.

  Concrete admixtures are materials used to modify the properties of concrete by reacting with or mixing with cement paste, and are often made of inorganic powders, which have a special function for cement substitutes and concrete. General purpose to grant. Typical admixtures include blast furnace slag and artificial pozzolanes (fly ash, silica fume, etc.) for the purpose of cement replacement, and it is important in concrete production to add these appropriately. Generally, blast furnace slag, fly ash, and silica fume contain black fine powder.

  However, recent increases in the use of silica fume, fly ash, blast furnace slag, etc., mixing of incinerated ash into cement (use of industrial waste), use of aggregates and admixtures containing lignite, workability, Due to the high fluidity of concrete for the purpose of improving environmental properties, black spots appear on the skin surface after hardening of the concrete, or a phenomenon in which the entire surface is darkened occurs, and an effective improvement measure is desired. As techniques for improving this, Patent Documents 1 and 2 disclose techniques using a copolymer of a chain olefin and an ethylenically unsaturated dicarboxylic acid. Patent Document 3 discloses that a concrete admixture containing a specific phosphate ester polymer and a specific olefin-maleic acid copolymer is excellent in preventing darkening of the concrete surface. .

JP 2004-83303 A JP 2004-175651 A JP 2007-186396 A

  However, in conventional admixtures for hydraulic compositions, the effect of preventing darkening of the cured skin surface is not sufficient in a compounding system containing a large amount of black fine particle components.

  An object of this invention is to provide the hydraulic composition which can suppress the darkening which generate | occur | produces on the hardening body skin surface even in the compounding system with many black fine particle components contained.

The present invention relates to a polymer (A) comprising a structural unit containing 70% by weight or more of a structural unit derived from a monomer represented by the following formula (1) (hereinafter referred to as component (A)), formaldehyde condensation with naphthalenesulfonic acid Product (B) [hereinafter referred to as component (B)], hydraulic powder (C) [hereinafter referred to as component (C)], powder containing fine black powder (X) [hereinafter referred to as component (X)] A hydraulic composition comprising an aggregate, and water,
The ratio of the component (C) to the component (X) is (C) / (X) = 95/5 to 20/80 (volume ratio),
The content of the component (A) with respect to 100 parts by weight of the total of the component (C) and the component (X) is 0.02 to 0.3 parts by weight,
It relates to a hydraulic composition.
H ₂ C═CHCOOCH ₂ CH ₂ OH (1)

  ADVANTAGE OF THE INVENTION According to this invention, the hydraulic composition which can suppress the darkening which generate | occur | produces on hardened | cured body skin surfaces, such as a concrete skin surface, is provided even in the compounding system containing many black fine particle components.

  The present invention is a hydraulic composition containing (A) component, (B) component, (C) component, (X) component, aggregate, and water. Hereinafter, components and the like used in the hydraulic composition will be described.

<(A) component>
Component (A) is a polymer in which 70% by weight or more of the structural unit is a structural unit derived from the monomer represented by the above formula (1) [hereinafter referred to as monomer (1)]. The component (A) is preferably 75% by weight or more of the structural unit, more preferably 85% by weight or more, and still more preferably 90% by weight or more of the structural unit derived from the monomer (1). By using together the component (A) in which the proportion of the structural unit derived from the monomer (1) in the structural unit is within this range, the fluid retention can be imparted and darkening can be suppressed. . In addition, when there exists the salt of the acid or base neutralized in the structural unit of (A) component, the structural unit is converted with the weight of the acid type or base type before neutralization, Formula (1) The weight% of the structural unit derived from the monomer represented by is calculated.

  From the viewpoint of suppressing darkening of the surface of a cured body such as concrete, the weight average molecular weight of the component (A) is preferably 1000 to 100,000, more preferably 3000 to 80000, and further preferably 5000 to 60000. The weight average molecular weight of the component (A) is measured by using size exclusion chromatography (GPC) and using polystyrene as a RI detector and a calibration substance. The measurement conditions are as in Synthesis Example 1 described later.

  The component (A) can be obtained by a known polymerization method, and the polymerization concentration is preferably 10% by weight or more from an industrial viewpoint. The polymerization method can be performed by a method such as radical polymerization, living radical polymerization, or ionic polymerization, and is preferably radical polymerization. The polymerization solvent is not limited as long as the monomer is soluble, but includes water, methyl alcohol, ethyl alcohol, isopropyl alcohol, benzene, toluene, xylene, cyclohexane, n-hexane, ethyl acetate, acetone, methyl ethyl ketone, and the like. Water, methyl alcohol, ethyl alcohol and isopropyl alcohol are preferred.

  As the polymerization initiator, known initiators such as an azo initiator, a peroxide initiator, a macro initiator, and a redox initiator may be used. In the case of a polymerization solvent containing water, as a polymerization initiator, an ammonium salt or alkali metal salt of persulfuric acid, hydrogen peroxide, 2,2′-azobis (2-amidinopropane) dihydrochloride, 2,2′-azobis ( Water-soluble azo compounds such as 2-methylpropionamido) dihydrate. In the case of a polymerization solvent not containing water, examples of the polymerization initiator include peroxides such as benzoyl peroxide and lauroyl peroxide, and aliphatic azo compounds such as azobisisobutyronitrile.

  Furthermore, you may use a chain transfer agent for the purpose of a molecular weight modifier etc. as needed. Examples of chain transfer agents include thiol chain transfer agents and halogenated hydrocarbon chain transfer agents, and thiol chain transfer agents are preferred.

As the thiol-based chain transfer agent, those having a -SH group are preferable, and further, a general formula HS-R-Eg (wherein R represents a hydrocarbon-derived group having 1 to 4 carbon atoms, E is —OH, —COOM, —COOR ′ or —SO ₃ M group, M represents a hydrogen atom, monovalent metal, divalent metal, ammonium group or organic amine group, and R ′ has 1 to 10 carbon atoms. Represents an alkyl group, and g represents an integer of 1 to 2). For example, mercaptoethanol, thioglycerol, thioglycolic acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, thiomalic acid , Octyl thioglycolate, octyl 3-mercaptopropionate, etc., from the viewpoint of the chain transfer effect in the copolymerization reaction containing monomers 1 to 3, mercaptopropion , Mercaptoethanol are preferable, more preferably mercaptopropionic acid. These 1 type (s) or 2 or more types can be used.

  Examples of the halogenated hydrocarbon chain transfer agent include carbon tetrachloride and carbon tetrabromide.

  Examples of other chain transfer agents include α-methylstyrene dimer, terpinolene, α-terpinene, γ-terpinene, dipentene, 2-aminopropan-1-ol and the like. A chain transfer agent can use 1 type (s) or 2 or more types.

  Although it does not limit about superposition | polymerization temperature, Preferably what is necessary is just to control in the area | region below the boiling point of a superposition | polymerization solvent.

  As the component (A), a monomer other than the monomer (1) can be used as a constituent monomer. For example, (i) monocarboxylic acids such as (meth) acrylic acid and crotonic acid or salts thereof (for example, alkali metal salts, alkaline earth metal salts, ammonium salts, mono-, di-, tri-alkyls in which hydroxyl groups may be substituted) Alkyl (C2-C8) ammonium salt) or esters thereof (for example, acrylic acid esters or methacrylic acid esters other than the monomer (1)). Furthermore, for example, (ii) dicarboxylic acid monomers such as maleic acid, itaconic acid, fumaric acid, or acid anhydrides or salts thereof (for example, alkali metal salts, alkaline earth metal salts, ammonium salts, hydroxyl groups are substituted) Mono, di, trialkyl (carbon number 2 to 8) ammonium salt) or ester which may be included. Among these, (meth) acrylic acid, maleic acid, maleic anhydride, or alkali metal salts thereof are preferable, and (meth) acrylic acid or alkali metal salts thereof are more preferable. In addition, (meth) acrylic acid means acrylic acid and / or methacrylic acid (hereinafter the same).

<(B) component>
Component (B) is a naphthalenesulfonic acid formaldehyde condensate, and from the viewpoint of the fluidity of concrete, the weight average molecular weight is preferably 200000 or less, more preferably 100000 or less, still more preferably 80000 or less, and even more preferably 50000 or less. Further, the weight average molecular weight is preferably 1000 or more, more preferably 3000 or more, further preferably 4000 or more, and more preferably 5000 or more. Therefore, 1000-200000 are preferable, 3000-100000 are more preferable, 4000-80000 are still more preferable, 5000-50000 are still more preferable. The (B) component naphthalenesulfonic acid formaldehyde condensate may be in an acid state or a neutralized product.

  Examples of the method for producing a naphthalenesulfonic acid formaldehyde condensate 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 as formaldehyde with respect to 1 mol of the sulfonated product, and condensed at 95 to 105 ° C. after the addition. Perform the reaction. If necessary, water and a neutralizing agent are added to the condensate, and a neutralization step is performed at 80 to 95 ° C. The neutralizing agent is preferably added in an amount of 1.0 to 1.1 moles per each of naphthalenesulfonic acid and unreacted sulfuric acid. Further, water-insoluble matter generated by neutralization may be removed, preferably separated by filtration. 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 or as a component (B) by appropriately adding other components. Although the solid content concentration of the aqueous solution depends on the application, the component (B) is preferably 30 to 45% by weight. Further, if necessary, the aqueous solution can be dried and powdered to obtain a powdery naphthalenesulfonic acid formaldehyde condensate water-soluble salt, which may be used as the powdery component (B). Drying and powdering can be performed by spray drying, drum drying, freeze drying, or the like.

<(C) component>
A hydraulic powder is a powder that has a property of reacting with water and hardened, and a single substance does not have curability, but when two or more kinds are combined, a hydrate is formed by interaction through water. A powder that hardens. Examples of the hydraulic powder (C) include ordinary Portland cement, early-strength Portland cement, super-early-strength Portland cement, mixed cement, and eco-cement (for example, JIS R5214). As hydraulic powder other than cement, gypsum other than powder containing black fine powder shown below may be included.

<(X) component>
Black fine powder is hydrophobic black particles and generally refers to unburned carbon. As powder (X) containing black fine powder, 1 or more types chosen from the group which consists of blast furnace slag, fly ash, and a silica fume are preferable. In addition, when the component applicable to (X) component is mix | blended with (C) component, the quantity shall be included in the quantity of (X) component.

<Aggregate>
Moreover, the hydraulic composition of this invention contains an aggregate. As the aggregate, fine aggregate and coarse aggregate are preferable. The term “aggregate” is based on “Concrete Directory” (issued June 10, 1998, published by Technical College). As the fine aggregate, mountain sand, land sand, river sand and crushed sand are preferable, and fine aggregate containing lignite may be used. Moreover, as the coarse aggregate, mountain gravel, land gravel, river gravel, and crushed stone are preferable. Depending on the application, lightweight aggregates may be used.

<Other ingredients>
Moreover, the hydraulic composition of the present invention can contain powders other than powders including hydraulic powders and black fine powders for the purpose of preventing material separation or recycling from an environmental viewpoint. Examples of powders other than powders including hydraulic powder and black fine powder include charcoal cal, stone powder, and garbage incineration ash.

  In addition, the hydraulic composition used in the present invention includes an AE agent, a fluidizing agent, a retarder, an early strengthening agent, an accelerator, a foaming agent, a thickening agent, a waterproofing agent, an antifoaming agent, and shrinkage reduction. An agent, a swelling agent, a water-soluble polymer, a surfactant and the like can be contained.

<Composition of hydraulic composition>
In the hydraulic composition of the present invention, the ratio of the component (C) to the component (X) is (C) / (X) = 95/5 to 20/80 (volume ratio), preferably 90/10. -30/70, more preferably 80 / 20-40 / 60. When the ratio of (C) / (X) is within this range, the darkening suppression effect on the concrete surface becomes significant.

  In the hydraulic composition of the present invention, the content of the component (A) with respect to 100 parts by weight of the total of the component (C) and the component (X) is 0.02 to 0.3 parts by weight, preferably 0.8. It is 03-0.25 weight part, More preferably, it is 0.05-0.2 weight part. When the content of the component (A) is within this range, excellent fluidity retention of the hydraulic composition can be imparted, and darkening of the concrete surface can be suppressed.

  Further, the hydraulic composition of the present invention has a content of the component (B) of 0.2 to 1 with respect to 100 parts by weight of the total of the component (C) and the component (X) from the viewpoint of arbitrarily adjusting the initial fluidity. The amount is preferably 0.5 parts by weight, more preferably 0.25 to 1.0 part by weight, and still more preferably 0.3 to 0.75 part by weight.

  Moreover, in the hydraulic composition of this invention, the weight ratio of (A) component and (B) component is (A) / (B) = 3 / 97-45 / 55, Furthermore, 5 / 95-40 / 60. Further, 10/90 to 30/70 is preferable from the viewpoint of fluidity retention of the hydraulic composition and suppression of darkening of the concrete.

Water / hydraulic powder ratio of the hydraulic composition used in the present invention [weight percentage (% by weight) of water and hydraulic powder in slurry, usually abbreviated as W / P, In the case of cement, it may be abbreviated as W / C. ] May be 10 to 60% by weight, further 10 to 50% by weight, further 10 to 40% by weight, and further 10 to 35% by weight. As the W / P value is smaller, the low viscosity characteristic of the hydraulic composition becomes more prominent, and the compaction effect becomes more prominent. In addition, among the component (X), the powder having hydraulic properties is calculated as W / P as the component (C) (hydraulic powder). Therefore, for example, when the component (C) including the component (X) is used, W / P can be calculated using the amount as the amount of the hydraulic powder as it is. The amount of component (X) is preferably 330 kg at the maximum with respect to 1 m ^{3 of the} uncured hydraulic composition (fresh hydraulic composition).

The hydraulic composition of the present invention contains fine aggregate and coarse aggregate, but the content of the fine aggregate is 1 m ^{3 of} uncured hydraulic composition (fresh hydraulic composition). 600 to 1100 kg, more preferably 650 to 850 kg. Further, the content of the coarse aggregate is preferably 800 to 1200 kg, more preferably 900 to 1100 kg with respect to 1 m ³ of the uncured hydraulic composition (fresh hydraulic composition).

  Moreover, in the hydraulic composition of this invention, it is preferable that a fine aggregate rate (s / a) is 38-55 volume%, Furthermore, 40-50 volume%. s / a is calculated by s / a = [S / (S + G)] × 100 (volume%) based on the volume of the fine aggregate (S) and the coarse aggregate (G).

  The hydraulic composition of the present invention comprises (C) component, (X) component (for example, blast furnace slag, fly ash, silica fume, etc.), aggregate (preferably fine aggregate and coarse aggregate) and (A). It can prepare by the method of mix | blending the water containing a component and (B) component. In the case of blending, various blending methods may be performed, such as mixing these at the same time or mixing the powder in advance and then mixing the aggregate and further mixing the aqueous solution.

  The hydraulic composition of the present invention can be used as concrete, outside the field of ready-mixed concrete and concrete vibration products, for self-leveling, for refractories, for plaster, for gypsum slurry, for lightweight or heavy concrete, for AE, for repair It is useful in any field of various concrete such as prepacked, trayy, grout, ground improvement, and cold.

[Component (A)]
As the component (A), polymers of the following synthesis examples were used.

<Synthetic raw material>
Hydroxyethyl acrylate: Aldrich (96% effective content) [monomer (1)]
Acrylic acid: Aldrich (99% effective)
・ Mercaptopropionic acid: Aldrich
・ Ammonium peroxodisulfate: Wako Pure Chemical Industries, Ltd.

<Synthesis example>
Synthesis example 1
Into a four-necked flask of the reaction vessel, 84.2 g of ion-exchanged water was charged, and after deaeration, a nitrogen atmosphere was established. A monomer liquid was prepared by mixing 20.2 g of acrylic acid (hereinafter referred to as AA) and 83.5 g of hydroxyethyl acrylate (hereinafter referred to as HEA). An initiator aqueous solution (1) was prepared by dissolving 1.3 g of ammonium peroxodisulfate in 26.4 g of ion-exchanged water. 2.6 g of 3-mercaptopropionic acid was dissolved in 25 g of ion-exchanged water to prepare an aqueous chain transfer agent solution. The reaction vessel was brought to 80 ° C., and the monomer solution, the initiator aqueous solution (1) and the chain transfer agent aqueous solution were simultaneously added dropwise over 90 minutes. Thereafter, an aqueous initiator solution (2) obtained by dissolving 0.3 g of ammonium peroxodisulfate in 6.6 g of ion-exchanged water was added dropwise over 30 minutes, and further reacted at 80 ° C. for 60 minutes. After completion of the reaction, the reaction solution was brought to room temperature and neutralized with a 48% aqueous sodium hydroxide solution to obtain an aqueous solution of polymer A-1 having a pH of 5.
Preparation composition ratio:
AA / HEA = 19.5 / 80.5 (weight ratio) (HEA 80.5 wt%)
AA / HEA = 28.0 / 72.0 (molar ratio)
Weight average molecular weight: 34500
AA: 97% reaction rate (HPLC)
HEA: 98% reaction rate (HPLC)
The molecular weight was measured under the following GPC conditions.
[GPC conditions]
Standard material: Polystyrene conversion column: G4000PWXL + G2500PWXL (Tosoh)
Eluent: 0.2M phosphate buffer / acetonitrile = 9/1
Flow rate: 1.0mL / min
Column temperature: 40 ° C
Detector: RI

Synthesis example 2
Into a four-necked flask of the reaction vessel, 85.6 g of ion-exchanged water was charged, and after deaeration, a nitrogen atmosphere was established. A monomer solution was prepared by mixing 11.7 g of AA and 92.1 g of HEA. An initiator aqueous solution (1) was prepared by dissolving 1.3 g of ammonium peroxodisulfate in 25.2 g of ion-exchanged water. An aqueous chain transfer agent solution was prepared by dissolving 2.5 g of 3-mercaptopropionic acid in 25 g of ion-exchanged water. The reaction vessel was brought to 80 ° C., and the monomer solution, the initiator aqueous solution (1) and the chain transfer agent aqueous solution were simultaneously added dropwise over 90 minutes. Thereafter, an aqueous initiator solution (2) obtained by dissolving 0.3 g of ammonium peroxodisulfate in 6.3 g of ion-exchanged water was added dropwise over 30 minutes, and further reacted at 80 ° C. for 60 minutes. After the completion of the reaction, the reaction solution was brought to room temperature and neutralized with a 48% aqueous sodium hydroxide solution to obtain an aqueous solution of pH-5 polymer A-2.
Preparation composition ratio:
AA / HEA = 11.3 / 88.7 (weight ratio) (HEA 88.7% by weight)
AA / HEA = 17.0 / 83.0 (molar ratio)
Weight average molecular weight: 30600
AA: 97% reaction rate (HPLC)
HEA: 98% reaction rate (HPLC)
The measurement conditions for GPC are the same as in Synthesis Example 1.

Synthesis example 3
The reaction vessel was charged with 224.5 g of ion-exchanged water in a four-necked flask, and after deaeration, the atmosphere was set to nitrogen. An initiator aqueous solution (1) was prepared by dissolving 4.4 g of ammonium peroxodisulfate in 90 g of ion-exchanged water. A chain transfer agent aqueous solution in which 10.2 g of 3-mercaptopropionic acid was dissolved in 80 g of ion-exchanged water was prepared. The monomer vessel of HEA 280 g, the initiator aqueous solution (1) and the chain transfer agent aqueous solution were dropped simultaneously over 90 minutes at 80 ° C. Thereafter, an initiator aqueous solution (2) obtained by dissolving 0.6 g of ammonium peroxodisulfate in 10 g of ion-exchanged water was dropped over 30 minutes, and further reacted at 80 ° C. for 60 minutes. After completion of the reaction, the mixture was brought to room temperature and neutralized while stirring with a 48% aqueous sodium hydroxide solution. An aqueous solution of polymer A-3 having a pH of 5 was obtained.
Charge composition ratio: HEA 100 mol% (100 wt%)
Weight average molecular weight: 14200
HEA: 96% reaction rate (HPLC)
The measurement conditions for GPC are the same as in Synthesis Example 1.

[(B) component]
As component (B), Mighty 150 [Naphthalenesulfonic acid formaldehyde condensate admixture, manufactured by Kao Corporation] was used. This was designated as B-1.

[Preparation and evaluation of concrete]
Concrete was prepared by the method shown below using the component (A) and the component (B) with the addition amount shown in Table 2 with respect to the components shown in Table 1, and the following evaluation was performed. The results are shown in Table 2.

The materials used in Table 1 are as follows.
W (water): tap water C (cement): ordinary Portland cement (ordinary Portland cement manufactured by Taiheiyo Cement Co., Ltd./ordinary Portland cement manufactured by Sumitomo Osaka Cement = 1/1 (weight ratio)), density 3.16 (G / cm ³ )
S: Fine aggregate, Joyosan sand, density 2.55 (g / cm ³ )
G: Coarse aggregate, limestone from Torigatayama, density 2.72 (g / cm ³ )
FA: 2 types of fly ash made by Hokuriku Electric Power, density 2.22 (g / cm ³ )
BS: Sumikin Mineralized blast furnace slag, density 2.88 (g / cm ³ )
W / P = [W / (C + FA + BS)] × 100 (% by weight)
Since FA and BS correspond to hydraulic powder, these amounts are also used for calculating W / P.

(Performance evaluation)
(1) Method for evaluating slump flow retention of concrete Into a 60 L kneaded biaxial mixer, 30 L of the concrete composition shown in Table 1 is added to all materials and the ingredients (A) and (B) dissolved in the kneading water shown in Table 2 to 120 Kneaded for 2 seconds. The slump flow was measured for the concrete immediately after preparation and after 30 minutes. The slump retention rate was calculated by the following method.
Slump retention rate (%) = (slump flow value after 30 minutes / slump flow value immediately after preparation) × 100

(2) Evaluation method of darkening 30L of the concrete composition shown in Table 1 is added to a 60L kneaded biaxial mixer, and all ingredients and components (A) and (B) dissolved in the kneading water shown in Table 2 are added and kneaded for 120 seconds. did. Immediately after preparation, the concrete is put into a tin container of 60cm in length, 100cm in width, and 20cm in height, the concrete surface is photographed, the darkened part is judged by visual observation, the photograph is binarized, and the total area is analyzed by image analysis. The area of the darkened portion was determined and used as the darkened area ratio. In addition, the amount of darkening [referred to as “darkening amount _(B) ”] was similarly determined for the concrete to which only the component (B) was added. The amount of darkening when using this “darkening amount _(B) ” and both the (A) component and the (B) component (part of the comparative example is only the (B) component) (denoted as test system in the table) From [The amount of darkening _{(A) + (B)} ]], the evaluation of darkening suppression was performed with the darkening suppression rate according to the following formula.
Darkening suppression rate (%) = {(darkening amount _(B) ) − (darkening amount _{(A) + (B)} )} / (darkening amount _(B) ) × 100

  In Table 2, C / FA / BS is a powder ratio (volume ratio), but hydraulic powder (C) contains C and powder (X) containing black fine powder contains FA and BS. Applicable.

Claims (5)

Polymer (A) [hereinafter referred to as component (A)] comprising a structural unit containing 70% by weight or more of a structural unit derived from a monomer represented by the following formula (1), naphthalenesulfonic acid formaldehyde condensate (B) [Hereinafter referred to as component (B)], hydraulic powder (C) [hereinafter referred to as component (C)], powder containing black fine powder (X) [hereinafter referred to as component (X)], aggregate, And a hydraulic composition containing water,
When the component (A) includes a structural unit other than the structural unit derived from the monomer represented by the formula (1), the structural unit is a structural unit derived from (meth) acrylic acid or a salt thereof,
The ratio of the component (C) to the component (X) is (C) / (X) = 95/5 to 20/80 (volume ratio),
The content of the component (A) with respect to 100 parts by weight of the total of the component (C) and the component (X) is 0.02 to 0.3 parts by weight,
The component (X) is one or more selected from the group consisting of blast furnace slag, fly ash and silica fume.
Hydraulic composition.
H ₂ C═CHCOOCH ₂ CH ₂ OH (1) The hydraulic composition according to claim 1, wherein the aggregate is a fine aggregate and a coarse aggregate. The hydraulic composition according to claim 1 or 2, wherein the weight ratio of the component (A) to the component (B) is (A) / (B) = 3/97 to 45/55.   The hydraulic composition according to any one of claims 1 to 3, wherein the content of the component (B) is 0.2 to 1.5 parts by weight relative to 100 parts by weight of the total of the component (C) and the component (X). . (A) the component is a polymer composed of a structural unit containing 100% by weight of the structural unit derived from the monomer represented by formula (1), and the structural unit derived from the monomer represented by formula (1) It is a polymer selected from a polymer consisting of (meth) acrylic acid or a salt-derived structural unit and containing 70% by weight or more of a monomer-derived structural unit represented by formula (1). The hydraulic composition of any one of 1-4.