Placing method of hydraulic composition

Abstract

To provide a casting method for a hydraulic composition that can suppress the separation of the hydraulic composition in water while maintaining the pipe pressure feeding of the hydraulic composition in a capillary.SOLUTION: In a casting method of a hydraulic composition, a hydraulic composition containing water, a hydraulic powder and (A) an amine oxide-type surfactant is transferred through a pipe having an inner diameter of 50 mm or less and cast in a predetermined place.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a method for placing a hydraulic composition.

Background Art

[0002] Hydraulic compositions such as concrete and mortar are used in various fields such as civil engineering and construction. For example, the hydraulic composition is used as a void filler for filling the gaps between pipes and the ground, the gaps in the ground, and the like. In general, various chemical admixtures such as AE agents, water reducing agents, AE water reducing agents, high-performance water reducing agents, high-performance AE water reducing agents, fluidizing agents, and setting retarders are used to adjust the workability, fluidity, strength, setting time, hardening time, etc. of the hydraulic composition.

[0003] Patent Document 1 discloses a hydraulic slurry containing water (a), at least one type of hydraulic powder (b) selected from cement or a cement-based solidifying material, at least one type of auxiliary material (c) selected from clay mineral powder, fly ash, limestone powder, silica powder, and blast furnace slag powder, and at least one type of stimulant (d) selected from alumina, gypsum, and sodium silicate, and a slurry modifier composed of an aromatic compound having a sulfone group and / or its salt and an alkyltrimethylammonium salt.

[0004] Patent Document 2 discloses a rheology modifier containing two or more specific amine oxides having different structures.

[0005] Patent Document 3 discloses a self-compacting concrete composition in which a concrete composition containing an alkylamine oxide having an alkyl group with 8 to 22 carbon atoms and a high-performance water reducing agent has a slump flow value (spread measured according to JIS-A 1101) of 50 cm or more.

[0006] On the other hand, hydraulic compositions such as concrete are often placed not only on land but also in water. For example, Patent Document 4 discloses a method for placing underwater non-segregating concrete in which an underwater non-segregating admixture or segregation reducing agent that imparts viscosity to concrete and prevents separation of materials in water is incorporated, and when the tip of a concrete placement pipe is embedded in this underwater non-segregating concrete, high-fluidity concrete is placed using the same concrete placement pipe. Further, Patent Document 5 discloses a method for pumping an underwater non-segregating material that pumps a cement-based material having underwater non-segregating properties inside a pipe, the method including a step of injecting a liquid having a lower viscosity than the cement-based material into the inside of the pipe through an injection pipe, and a step of adhering the injected liquid to the inner surface of the pipe to form a lubricating layer on the inner surface. And it is disclosed that a cement-based material having underwater non-segregating properties has a high viscosity compared to ordinary cement-based materials such as normal concrete, so that a high pressure is generated when pumping inside a pipe, and when the pressure inside the pipe is high, the friction inside the pipe between the cement-based material and the inner surface of the pipe becomes large, so that it is impossible to pump a cement-based material having underwater non-segregating properties over a long distance.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0008] As a hydraulic composition, a water-insoluble hydraulic composition with little material separation in water is known. Generally, imparting water-insolubility to a hydraulic composition is achieved by adding a thickening agent or the like. However, for example, when attempting to impart water-insolubility to a hydraulic composition as desired for void filling in water, it is necessary to increase the elasticity of the hydraulic composition and add a large amount of thickening agent. As a result, the viscosity of the hydraulic composition increases and the pipe pumping performance significantly deteriorates. Also, due to this, in order to pump the hydraulic composition through a pipe, it is necessary to take measures such as placing it over time, using a pipe with a large inner diameter, or placing it with a powerful pump. However, considering the response to complex shapes and economy, it is desired that a pipe with a smaller inner diameter can be utilized. Also, in order to facilitate transfer through a pipe, if the water / water-hardening powder ratio, which is the mass ratio of water to water-hardening powder in the hydraulic composition, is increased, the water-insolubility further decreases, and if the water / water-hardening powder ratio is decreased to advantageously improve water-insolubility, the transfer through the pipe becomes even more difficult.

[0009] The present invention provides a placing method for a hydraulic composition that can suppress separation of the hydraulic composition in water while maintaining the pipe pumping performance of the hydraulic composition in a thin pipe.

Means for Solving the Problems

[0010] The present invention relates to a placing method for a hydraulic composition, in which a hydraulic composition containing water, water-hardening powder, and (A) an amine oxide type surfactant [hereinafter referred to as component (A)] is transferred through a pipe with an inner diameter of 50 mm or less and placed at a predetermined location.

Effects of the Invention

[0011] According to the present invention, there is provided a placing method for a hydraulic composition that can suppress separation of the hydraulic composition in water while maintaining the pipe pumping performance of the hydraulic composition in a thin pipe with an inner diameter of 50 mm or less.

Modes for Carrying Out the Invention

[0012] In the present invention, by combining water, hydraulic powder, and component (A), a placing method of a hydraulic composition is provided which exhibits excellent water non-separability while maintaining the pipe pumping property of the hydraulic composition in a thin pipe. Some thickeners using surfactants thicken by forming string-like micelles. Among thickeners using string-like micelles, elasticity can be improved more effectively than general other organic or inorganic thickeners. The string-like micelles formed by component (A) tend to have a shorter relaxation time than other string-like micelles, and the entanglement of the string-like micelles is less likely to be loosened. That is, component (A) can elastically integrate the hydraulic composition with a smaller amount and efficiently impart water non-separability, so it does not thicken stickily and can smoothly pass through a narrow gap. Accordingly, it is considered that the hydraulic composition according to the present invention can exhibit excellent water non-separability while maintaining the pipe pumping property of the hydraulic composition in a thin pipe. Note that the mechanism of the expression of the effects of the present invention is not limited thereto.

[0013] First, the hydraulic composition according to the present invention will be described. As the water, tap water, river water, lake water, etc. can be used.

[0014] The hydraulic powder is a powder that hardens by mixing with water. Examples thereof include ordinary Portland cement, early-strength Portland cement, ultra-early-strength Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, white Portland cement, and eco-cement (for example, JIS R5214, etc.). Among these, from the viewpoint of shortening the time until the required strength of the hydraulic composition is reached, cement selected from early-strength Portland cement, ordinary Portland cement, sulfate-resistant Portland cement, and white Portland cement is preferable, and cement selected from early-strength Portland cement and ordinary Portland cement is more preferable.

[0015] In addition, the hydraulic powder may include blast furnace slag, fly ash, silica fume, anhydrous gypsum, etc., and may also include non-hydraulic fine limestone powder, etc. As the hydraulic powder, blast furnace cement, fly ash cement, or silica fume cement in which cement is mixed with blast furnace slag, fly ash, silica fume, etc. may be used. Further, clay such as bentonite may be included within a range not impairing the effects of the present invention.

[0016] In the present invention, blast furnace slag cement may be used as the hydraulic powder. As the blast furnace slag cement, Type A blast furnace cement, Type B blast furnace cement, and Type C blast furnace cement defined in JIS R 5211 can be used.

[0017] The amine oxide type surfactant of the component (A) may be a surfactant having an amine oxide group. Examples of the amine oxide type surfactant include amine oxides having one hydrocarbon group having 8 or more, further 14 or more, and 22 or less carbon atoms. Examples of the component (A) include compounds represented by the following general formula (1).

[0018] [Chemical formula]

[0019] [In the formula, X is a group represented by R 1a or R 1b -[CONH-CH2CH2CH2] n -. R 1a is an alkyl group having 14 or more and 22 or less carbon atoms or an alkenyl group having 14 or more and 22 or less carbon atoms. R 1b is an alkyl group having 13 or more and 21 or less carbon atoms or an alkenyl group having 13 or more and 21 or less carbon atoms. n is an integer of 1 or more and 3 or less. R 2 and R 3 are each independently an alkyl group having 1 or more and 4 or less carbon atoms or -(C2H4O)p is a group represented by H. p is the average number of moles added, and R 2 and R 3 is a number from 0 to 5 inclusive in total. .

[0020] In the present invention, the component (A) is two or more compounds represented by the general formula (1) [hereinafter also referred to as compound (1)], the two or more compounds have different X in the general formula (1), among the two or more compounds, at least one has R 1a or R 1b in X of the general formula (1) being an alkenyl group-containing compound, which is preferable. Hereinafter, this embodiment will be described.

[0021] Regarding compound (1), when X in the general formula (1) is different, taking the case where there are two compounds (1) as an example, for example, the following embodiments can be mentioned. In the following embodiments, among the two compounds (1), R 1a or R 1b of at least one of the compounds (1) is an alkenyl group. (i) One of R 1a or R 1b is an alkyl group, and the other of R 1a or R 1b is an alkenyl group. (ii) The number of carbon atoms of one of R 1a or R 1b is different from the number of carbon atoms of the other of R 1a or R 1b . (iii) One X is R 1a , and the other X is R 1b -[CONH-CH2CH2CH2] n -. (iv) Both X are R 1b -[CONH-CH2CH2CH2] n -, and one n and the other n are different. (v) Combinations of (i) to (iv) above.

[0022] In general formula (1), X is R 1a or R 1b -[CONH-CH2CH2CH2] n - is a group represented by R 1a is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms. R 1a When R is an alkenyl group, the number of carbon atoms is preferably 18 or more, and preferably 22 or less. R 1a When R is an alkyl group, the number of carbon atoms is preferably 16 or more, and preferably 22 or less. R 1b is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. R 1b When R is an alkenyl group, the number of carbon atoms is preferably 17 or more, and preferably 21 or less. R 1b When R is an alkyl group, the number of carbon atoms is preferably 15 or more, and preferably 21 or less. n is an integer of 1 or more and 3 or less. Preferably, n is 0 or 1. R 2 and R 3 are each independently preferably an alkyl group having 1 to 2 carbon atoms or a group represented by (C2H4O) p H. p is preferably a number of 0 or more and 3 or less.

[0023] In the present invention, two or more, preferably five or less, more preferably two compounds (1) in which X in general formula (1) is different are used. And, at least one of the two or more compounds (1) used in the present invention is a compound in which R 1a or R 1b in X in general formula (1) is an alkenyl group having 14 to 22 carbon atoms, that is, R 1a in X in general formula (1) is an alkenyl group having 14 to 22 carbon atoms or a compound containing an alkenyl group having 13 to 21 carbon atoms as R 1b in X in general formula (1).

[0024] In the present invention, there are two types of compound (1). Among the two types of compound (1) including the above (i) to (v), one is a compound in which X in the general formula (1) is R 1a and is preferably a compound having an alkenyl group with 14 to 22 carbon atoms. That is, the component (A) is two types of compounds represented by the general formula (1), and in the two types of compounds, X in the general formula (1) is different. Among the two types of compounds, one is a compound in which X in the general formula (1) is R 1a and R 1a is preferably a compound having an alkenyl group.

[0025] As the component (A), a combination of a compound (1a) in which X in the general formula (1) is R 1a or R 1b -[CONH-CH2CH2CH2] n -represented group (wherein R 1a is an alkenyl group having 14 to 22 carbon atoms, and R 1b is an alkenyl group having 13 to 21 carbon atoms) and a compound (1b) in which X in the general formula (1) is different from that of the compound (1a) can be mentioned. Specifically, as the component (A), a combination of a compound (1a) represented by the following general formula (1a) and a compound (1b) represented by the following general formula (1b) can be mentioned.

[0026]

Chemical formula

[0027] 〔In the formula, n1 and n2 are each independently an integer of 0 or more and 3 or less. R 11a is an alkenyl group having 14 to 22 carbon atoms when n1 is 0, and is an alkenyl group having 13 to 21 carbon atoms when n1 is 1 to 3. R 11bWhen n2 is 0, it is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms, and when n2 is 1 to 3, it is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms. However, when n1 and n2 are the same number, R 11b 's alkenyl group is an alkenyl group different from R 11a . R 2 and R 3 are each independently an alkyl group having 1 to 4 carbon atoms or a group represented by -(C2H4O) p H. p is the average number of moles added, and the total of R 2 and R 3 is a number from 0 to 5 . ]

[0028] In general formula (1a), the number of carbon atoms of R 11a is preferably 17 or more, and preferably 22 or less. In general formula (1a), n1 is preferably 0 or 1, more preferably 0.

[0029] In general formula (1b), when n2 is 0 and R 11b is an alkyl group, the number of carbon atoms of R 11b is preferably 16 or more, and preferably 22 or less. In general formula (1b), when n2 is 0 and R 11b is an alkenyl group, the number of carbon atoms of R 11b is preferably 18 or more, and preferably 22 or less. In general formula (1b), when n2 is 1 to 3 and R 11b is an alkyl group, the number of carbon atoms of R 11b is preferably 15 or more, and preferably 21 or less. In general formula (1b), when n2 is 1 to 3 and R 11b is an alkenyl group, the number of carbon atoms of R 11b is preferably 17 or more, and preferably 21 or less. In general formula (1b), R 11b is preferably an alkyl group. In the general formula (1b), n2 is preferably 0 or 1.

[0030] In the general formula (1a) or (1b), R 2 and R 3 are each independently preferably an alkyl group having 1 or 2 carbon atoms or a group represented by -(C2H4O) p H, and more preferably an alkyl group having 1 or 2 carbon atoms. In the general formula (1a) or (1b), p is preferably a number of 0 or more and 3 or less. When n1 and n2 are the same number, the alkenyl group of R 11b is an alkenyl group different from R 11a

[0031] Examples of the component (A) of the present invention include a combination of a compound (11a) represented by the following general formula (11a) and a compound (1b) represented by the following general formula (1b).

[0032]

Chemical formula

[0033] 〔In the formula, n2 is an integer of 0 or more and 3 or less. R 11a is an alkenyl group having 14 or more and 22 or less carbon atoms. R 11b is an alkyl group having 14 or more and 22 or less carbon atoms or an alkenyl group having 14 or more and 22 or less carbon atoms when n2 is 0, and an alkyl group having 13 or more and 21 or less carbon atoms or an alkenyl group having 13 or more and 21 or less carbon atoms when n2 is 1 to 3. However, when n2 is 0, the alkenyl group of R 11b is an alkenyl group different from R 11a R 2 and R 3 are each independently an alkyl group having 1 or more and 4 or less carbon atoms or a group represented by -(C2H4O) p H. p is the average number of moles of addition, and R 2 and R​​3 a number that is 0 or more and 5 or less in total is. ]

[0034] The compound (11a) represented by the general formula (11a) corresponds to the compound in which n1 is 0 in the general formula (1a). R in the general formula (11a) 11a , R 2 and R 3 The preferred embodiments of are the same as those of the general formula (1a). Also in this combination, the preferred embodiment of the compound (1b) is the same as described above.

[0035] In the present invention, the mass ratio of the compound (1b) / compound (1a) is preferably 5 / 95 or more, more preferably 25 / 75 or more, still more preferably 30 / 70 or more, even more preferably 40 / 60 or more, and preferably 95 / 5 or less, more preferably 75 / 25 or less, still more preferably 70 / 30, even more preferably 65 / 35, even more preferably 60 / 40 or less.

[0036] In the hydraulic composition according to the present invention, the water / hydraulic powder ratio (hereinafter sometimes referred to as W / P) may be, for example, 50% by mass or more, further 60% by mass or more, and 500% by mass or less, further 200% by mass or less, further 150% by mass or less. Here, the water / hydraulic powder ratio is the mass percentage (% by mass) of water and hydraulic powder in the hydraulic composition, and is calculated by water / hydraulic powder × 100. The water / hydraulic powder ratio is calculated based on the amount of powder having physical properties that harden by a hydration reaction. In addition, when the hydraulic powder includes powders having pozzolanic action, latent hydraulicity, and stone powder (calcium carbonate powder) in addition to powders having physical properties that harden by a hydration reaction such as cement, in the present invention, their amounts are also included in the amount of the hydraulic powder. Also, when the powder having physical properties that harden 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. This is the same for other mass percentages and the like related to the mass of the hydraulic powder.

[0037] Component (A) can be used in a proportion of, for example, 0.001% by mass or more, further 0.01% by mass or more, further 0.1% by mass or more, and 20% by mass or less, further 10% by mass or less, further 5% by mass or less, further 3% by mass or less, further 2% by mass or less, further 1.5% by mass or less, based on the water of the hydraulic composition, from the viewpoint of achieving both good pumpability in pipes and non-separation in water of the hydraulic composition.

[0038] When compound (1) is used as component (A), the total amount of compound (1) is preferably 0.001% by mass or more, more preferably 0.01% by mass or more, still more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, even more preferably 8% by mass or less, even more preferably 5% by mass or less, based on the water of the hydraulic composition.

[0039] When compound (1a) and compound (1b) are used as component (A), compound (1a) is preferably 0.00095% by mass or more, more preferably 0.0075% by mass or more, still more preferably 0.035% by mass or more, even more preferably 0.06% by mass or more, and preferably 3.75% by mass or less, more preferably 3% by mass or less, still more preferably 2.8% by mass or less, even more preferably 2% by mass or less, even more preferably 1% by mass or less, based on the water of the hydraulic composition. Also, when compound (1a) and compound (1b) are used as component (A), compound (1b) is preferably 0.00005% by mass or more, more preferably 0.0025% by mass or more, still more preferably 0.015% by mass or more, even more preferably 0.04% by mass or more, and preferably 19% by mass or less, more preferably 11.25% by mass or less, still more preferably 7% by mass or less, even more preferably 5.2% by mass or less, even more preferably 3% by mass or less, based on the water of the hydraulic composition.

[0040] When using compound (1a) and compound (1b) as component (A), the mass ratio of compound (1b) / compound (1a) is preferably 5 / 95 or more, more preferably 25 / 75 or more, still more preferably 40 / 60 or more, and preferably 95 / 5 or less, more preferably 75 / 25 or less, still more preferably 60 / 40 or less.

[0041] The hydraulic composition according to the present invention can optionally contain water, hydraulic powder, and components other than component (A).

[0042] The hydraulic composition according to the present invention preferably contains an antifoaming agent [(B) component hereinafter]. From the viewpoint of defoaming properties, component (B) is preferably one or more compounds selected from polysiloxane, polyoxyethylene polyoxypropylene, polypropylene oxide and its derivatives (such as polyoxypropylene, polyoxypropylene glyceryl ether), acetylene glycol and its derivatives (such as acetylene glycol, alkylene oxide adduct of acetylene glycol), polyoxyalkylene fatty acid ester, polyoxyalkylene alkyl ether, polyoxyalkylene alkylamide, trialkyl phosphate, and alcohol. More preferably, these compounds are water-insoluble compounds.

[0043] Examples of polysiloxane include polysiloxane, dimethylpolysiloxane, polyhydroxymethylsiloxane, etc.

[0044] Examples of polyoxyethylene polyoxypropylene include polyoxyethylene polyoxypropylene random polymer, polypropylene oxide-polyethylene oxide-polypropylene oxide block polymer, etc. From the viewpoint of defoaming properties, the weight average molecular weight of these is preferably 2,000 or more and 100,000 or less.

[0045] Examples of polypropylene oxide and its derivatives include polyoxypropylene glyceryl ether and polyoxypropylene. From the viewpoint of defoaming performance, the weight average molecular weight of the polypropylene oxide moiety is preferably 2,000 or more and 100,000 or less.

[0046] Examples of acetylene glycol and its derivatives include commercially available products such as Acetylenol E00, Acetylenol E13 (both from Kawaken Fine Chemicals Co., Ltd.), DYNOL (registered trademark) 604, SURFYNOL (registered trademark) 440, SURFYNOL (registered trademark) 104, SURFYNOL (registered trademark) 2502, SURFYNOL (registered trademark) 420, and SURFYNOL (registered trademark) DF-75 (all from Air Products and Chemicals, Inc.). Examples of derivatives of acetylene glycol include alkylene oxide adducts of acetylene glycol. From the viewpoint of defoaming performance, the average number of moles of alkylene oxide added is preferably 1 or more and 100 or less. Propylene oxide is preferred as the alkylene oxide.

[0047] Examples of polyoxyalkylene fatty acid esters include alkylene oxide adducts of fatty acids having 4 to 22 carbon atoms. From the viewpoint of defoaming performance, the average number of moles of alkylene oxide added is preferably 1 or more and 100 or less. Also, from the same viewpoint, it is preferable for the alkylene oxide to contain propylene oxide.

[0048] Examples of polyoxyalkylene alkyl ethers include alkylene oxide adducts of alcohols having 4 to 22 carbon atoms. From the viewpoint of defoaming performance, the average number of moles of alkylene oxide added is preferably 1 or more and 100 or less. Also, from the same viewpoint, propylene oxide is preferred as the alkylene oxide. Specifically, examples include polypropylene glycol lauryl ether, polypropylene glycol myristyl ether, and mixtures thereof.

[0049] 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 number of moles of alkylene oxide added is preferably 1 or more and 100 or less. Also, from the same viewpoint, propylene oxide is preferred as the alkylene oxide.

[0050] Examples of trialkyl phosphates include tributyl phosphate and triisobutyl phosphate. From the viewpoint of defoaming properties, the number of carbon atoms in the alkyl group is preferably 1 or more and 5 or less.

[0051] 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 number of carbon atoms in the alcohol is preferably 6 or more and 18 or less.

[0052] Suitable examples of the defoaming agent include, as polysiloxanes, SAG (trademark) 672, SAGTEX (trademark) DSA (both Momentive Performance Materials Inc.), as polyoxyalkylene fatty acid esters, polyoxyalkylene alkyl ethers, or polyoxyalkylene alkylamides, polypropylene glycol lauryl ether, polypropylene glycol myristyl ether and mixtures thereof, propylene oxide - ethylene oxide adduct of oleic acid, SN Deformer 260 (trademark), SN Deformer 265 (trademark), SN Deformer 466 (trademark) (all Sanso Corporation), Defoaming Agent NO. 21 (trademark), Defoaming Agent NO. 8 (trademark) (both Kao Corporation), as acetylene glycols, DYNOL (trademark) 604, SURFYNOL (registered trademark) 440, as trialkyl phosphates, tributyl phosphate, triisobutyl phosphate, as an alcohol, 2 - ethylhexanol, as polyoxyethylene polyoxypropylene, Newpol PE - 61 (trademark), Newpol PE - 71 (trademark) (both Sanyo Chemical Industries, Ltd.), and as polyoxypropylene, polypropylene glycol having a molecular weight of 2,000 or more and 100,000 or less is included.

[0053] Also, from the viewpoint of economy, the defoaming agent preferably includes, as polysiloxanes, DK Q1 - 1183 (trademark), as polyoxyalkylene fatty acid esters, polyoxyalkylene alkyl ethers, or polyoxyalkylene alkylamides, SN Deformer 260 (trademark), SN Deformer 265 (trademark), SN Deformer 466 (trademark), Defoaming Agent NO. 21 (trademark), Defoaming Agent NO. 8 (trademark), as trialkyl phosphates, tributyl phosphate, triisobutyl phosphate, as an alcohol, 2 - ethylhexanol, as polyoxyethylene polyoxypropylene, Newpol PE - 61 (trademark), Newpol PE - 71 (trademark), and as polyoxypropylene, polypropylene glycol having a molecular weight of 2,000 or more and 100,000 or less.

[0054] When the hydraulic composition according to the present invention contains the component (B), the composition contains the component (B) in a proportion of preferably 0.001% by mass or more, more preferably 0.01% by mass or more, still more preferably 0.1% by mass or more, preferably 20% by mass or less, more preferably 10% by mass or less, and still more preferably 5% by mass or less, based on the component (A).

[0055] The hydraulic composition according to the present invention may contain (C) an anionic aromatic compound. Examples of the component (C) include one or more compounds selected from sulfonic acids having an aromatic ring, carboxylic acids having an aromatic ring, phosphonic acids having an aromatic ring, or salts thereof. The anionic aromatic compound is preferably an acid-type compound having a total carbon number of 6 or more and 12 or less. Specific examples of the anionic aromatic compound include salicylic acid, p-toluenesulfonic acid, sulfosalicylic acid, benzoic acid, m-sulfobenzoic acid, p-sulfobenzoic acid, 4-sulfophthalic acid, 5-sulfoisophthalic acid, p-phenolsulfonic acid, m-xylene-4-sulfonic acid, cumenesulfonic acid, methyl salicylic acid, styrenesulfonic acid, chlorobenzoic acid, etc. These may form salts. Two or more anionic aromatic compounds may be used. The anionic aromatic compound is preferably one or more compounds selected from sulfonic acids having an aromatic ring, carboxylic acids having an aromatic ring, or salts thereof.

[0056] When using the component (C), the mass ratio of the component (A) / the component (C), and further the mass ratio of the compound (1) / the component (C) is preferably 50 / 50 or more, more preferably 70 / 30 or more, still more preferably 80 / 20 or more, and preferably 99.9 / 0.1 or less, more preferably 95 / 5 or less.

[0057] The hydraulic composition according to the present invention can optionally contain components such as a dispersant, an AE agent, a retarder, a foaming agent, a thickener, a foaming agent, a waterproof agent, a fluidizing agent, etc., within a range that does not affect the effects of the present invention.

[0058] Incidentally, optional components such as component (B) and component (C) can be added when adding component (A) or after adding component (A), in addition to being premixed in the hydraulic composition. Further, it can also be used as a composition containing component (A) and an optional component, for example, component (C).

[0059] The hydraulic composition according to the present invention may contain aggregates. Examples of the aggregates include fine aggregates and coarse aggregates. The fine aggregates are preferably mountain sand, land sand, river sand, and crushed sand, and the coarse aggregates are preferably mountain gravel, land gravel, river gravel, and crushed stone. Depending on the application, lightweight aggregates may be used. The term "aggregate" is based on "Concrete General Survey" (issued by Technical Bookstore on June 10, 1998).

[0060] The hydraulic composition according to the present invention may be water non-separating. The fact that the hydraulic composition is water non-separating may mean, for example, that it is judged to have good water non-separability (the pH of the supernatant is less than 12) according to the water non-separability test method of water non-separating concrete described in the Design and Construction Guidelines for Water Non-separating Concrete (Draft) issued by the Japan Society of Civil Engineers.

[0061] The hydraulic composition according to the present invention may have a slump flow time of 100 seconds or less. This slump flow time is measured according to the "Fluidity Test Method for Injection Mortar of Prepacked Concrete" described in the Standard Specifications for Concrete (Standard Edition) issued by the Japan Society of Civil Engineers.

[0062] In the present invention, the hydraulic composition according to the present invention is placed at a predetermined location. The predetermined location may be underwater. That is, in the present invention, the hydraulic composition according to the present invention can be placed underwater. The placement underwater can be performed by a known method. The purpose of the placement can also be variously selected from known applications.

[0063] In the present invention, the hydraulic composition according to the present invention is preferably transferred through a pipe having an inner diameter of 10 mm or more, more preferably 13 mm or more, still more preferably 14 mm or more, still more preferably 20 mm or more, and an inner diameter of 50 mm or less, preferably 45 mm or less, and placed at a predetermined location. Here, the inner diameter is the diameter at the smallest part of the pipe. In the present invention, the hydraulic composition according to the present invention can be transferred by pressure feeding inside the pipe. Part or all of the pipe used in the present invention may have an inner diameter of 50 mm or less. For example, the ratio of the part having an inner diameter of 50 mm or less in the pipe used in the present invention may be, for example, 10% or more, further 30% or more, and 100% or less, further 50% or less with respect to the total length of the metal pipe. Also, from the viewpoint of suppressing adhesion to the metal, the length of the pipe used in the present invention is preferably 2 m or more, more preferably 5 m or more, still more preferably 10 m or more, and from the viewpoint of pressure feeding, preferably 100 m or less, more preferably 50 m or less, still more preferably 20 m or less.

[0064] The hydraulic composition according to the present invention can be pressure fed by a pump to transfer it through a pipe having a predetermined inner diameter. As the pump, a known pump such as a high-pressure pump can be used. In the present invention, even for a hydraulic composition having a large water / hydraulic powder ratio, for example, a hydraulic composition having a water / hydraulic powder ratio of 50% by mass or more and 500% by mass or less, which is considered to be relatively likely to cause water separation, it is possible to suppress the separation of the hydraulic composition in water while maintaining the pipe pressure feedability of the hydraulic composition in a thin pipe.

Examples

[0065] [Components Used] (1) Water Tap water (2) Hydraulic powder BF Type B cement (Sumitomo Osaka Cement Co., Ltd.) (3) Component (A) Oleyldimethylamine oxide Oleic acid amidopropyldimethylamine oxide (4) Component (B) Defoaming agent 1: manufactured by Momentive Performance Materials Ink, SAG672 Defoaming agent 2: manufactured by Toho Chemical Industry Co., Ltd., Pronal CA-3000 Defoaming agent 3: manufactured by Kao Corporation, Antifoam E-20 Defoaming agent 4: manufactured by San Nopco Ltd., SN Deformer 385 (5) Component (C) Sodium m-xylene sulfonate Sodium p-toluenesulfonate

[0066] [Additive] Formulations 1 - 4: Additives obtained by combining component (A) and component (C) as shown in Table 1 (% in Table 1 is % by mass) Commercially available mixture: manufactured by Shin-Etsu Chemical Co., Ltd., Asca Clean Bentonite: manufactured by Tachibana Materials Co., Ltd., TB-250 C16 quaternary salt: Hexadecyltrimethylammonium chloride C18 quaternary salt: Octadecyltrimethylammonium chloride Basic magnesium carbonate: manufactured by Kanto Chemical Co., Inc.

[0067]

Table 1

[0068] [Example 1 and Comparative Example 1] [Preparation of cement slurry] (1) Examples 1-1 to 1-2 2240 g of water and 2800 g of hydraulic powder were added to a 20-liter plastic bucket and stirred with a hand mixer for 30 seconds. Then, the amount (as is) of Formulation 1 in Table 1 shown in Table 2 was added, and the mixture was stirred and mixed until uniform and then further stirred for 1 minute to obtain a cement slurry. The obtained cement slurry was immediately subjected to a water non-separation test and a filling property test. In Table 2, W / P is the water / hydraulic powder ratio (% by mass) (the same applies hereinafter).

[0069] (2) Examples 1-3 to 1-4 To a 20-liter plastic bucket, 2240 g of water, 2800 g of hydraulic powder, and a predetermined amount of component (B) shown in the table were added, and the mixture was stirred with a hand mixer for 30 seconds. Then, the formulation 1 in Table 1 was added in the predetermined amounts (as is) shown in Table 2, and the mixture was stirred until uniform and then further stirred for 1 minute to obtain a cement slurry. The obtained cement slurry was immediately subjected to a water non-separation test and a filling property test.

[0070] (3) Comparative Examples 1-1 to 1-3 To a 20-liter plastic bucket, 2000 g of water and 2800 g of hydraulic powder were added, and the mixture was stirred with a hand mixer for 30 seconds. Then, a admixture slurry in which a predetermined amount of the commercially available admixture was well dispersed in 240 g of water was added, and the mixture was stirred until uniform and then further stirred for 1 minute to obtain a cement slurry. Here, the commercially available admixture was used such that the addition amount to the hydraulic powder (denoted as powder in the table) of the cement slurry was as shown in Table 2. The obtained cement slurry was immediately subjected to a water non-separation test and a filling property test.

[0071] (4) Comparative Examples 1-4 to 1-5 A predetermined amount of the bentonite and 2240 g of water were well mixed and allowed to swell for 24 hours or more to prepare a bentonite slurry. Next, 2800 g of hydraulic powder and the total amount of the bentonite slurry were added to a 20-liter plastic bucket, and the mixture was stirred with a hand mixer for 1 minute to obtain a cement slurry. Here, the bentonite was used such that the addition amount to the powder of the cement slurry was as shown in Table 2. The obtained cement slurry was immediately subjected to a water non-separation test and a filling property test.

[0072] (5) Comparative Examples 1-6 to 1-8 To a 20-liter plastic bucket, 2240 g of water, 2800 g of hydraulic powder, a predetermined amount of component (B) shown in Table 2, and an aqueous solution of component (C) (sodium p-toluenesulfonate) with the concentration shown in Table 2 were added in a predetermined amount (amount as an aqueous solution), and the mixture was stirred with a hand mixer for 30 seconds. Then, an aqueous solution containing C16 quaternary salt and C18 quaternary salt in a mass ratio of C16 quaternary salt / C18 quaternary salt = 60 / 40 and at the predetermined concentration shown in Table 2 was added in a predetermined amount (amount as an aqueous solution), and after stirring to make it uniform, it was further stirred for 1 minute to obtain a cement slurry. The obtained cement slurry was immediately subjected to a water non-separation test and a filling property test.

[0073] (6) Comparative Examples 1-9 to 1-10 To a 20-liter plastic bucket, 2240 g of water, 2800 g of hydraulic powder, and a predetermined amount of basic magnesium carbonate shown in Table 2 were added, and the mixture was stirred with a hand mixer for 1 minute to obtain a cement slurry. The obtained cement slurry was immediately subjected to a water non-separation test and a filling property test.

[0074] Note that the addition amounts of each additive used in Example 1 and Comparative Example 1 were adjusted to an amount that can impart water non-separability (a large addition amount) or an amount that shortens the flow-down time (a small addition amount).

[0075] [Evaluation] (1) Water non-separation test The test was conducted according to the water non-separation degree test method of water non-separating concrete described in the Design and Construction Guidelines (Draft) for Water Non-separating Concrete issued by the Japan Society of Civil Engineers. According to this guideline, in this evaluation, when the pH of the supernatant is less than 12, it is judged that the water non-separability is good.

[0076] (2) Filling property test The P - funnel flow - down time of the cement slurry was tested in accordance with the "Test Method for Fluidity of Grouting Mortar for Prepacked Concrete" described in the "Standard Specification for Concrete (Standard Edition)" issued by the Japan Concrete Institute, a public interest incorporated association. The inner diameter of the discharge port of the P - funnel was 13 mm. The shorter the flow - down time, the better the fillability (workability). In this evaluation, if the flow - down time is less than 60 seconds, the fillability is judged to be good. On the other hand, in this evaluation, those with a flow - down time of 60 seconds or more have poor fillability, and those with a flow - down time of 75 seconds or more are evaluated as having poor pipe pumping performance.

[0077]

Table 2

[0078] Note that the water - to - additive ratio in the table is the mass % with respect to water, the water - to - powder ratio is the mass % with respect to hydraulic powder, and the water - to - additive ratio for additives is the mass % with respect to additives (the same applies hereinafter).

[0079] In Examples 1 - 1 to 1 - 4, the supernatant pH is 11.4 or less, and the P - funnel flow - down time is 38 seconds or less, enabling both water - in - water non - separation and transferability with a pipe having an inner diameter of 13 mm. On the other hand, in Comparative Examples 1 - 1, 1 - 2, 1 - 5, 1 - 6, 1 - 9, and 1 - 10 containing additives other than component (A), the supernatant pH is 12.5 or more and the water - in - water non - separation property is poor. In Comparative Examples 1 - 3, 1 - 4, 1 - 7, and 1 - 8, the P - funnel flow - down time is 117 seconds or more and the transferability with a pipe having an inner diameter of 13 mm is poor. That is, the comparative examples cannot achieve both water - in - water non - separation and transferability with a pipe having an inner diameter of 13 mm.

[0080] <Examples 2 and Comparative Examples 2> Cement slurry was prepared in the same manner as in Examples 1 - 3 to 1 - 4, and the same evaluations were performed. In Comparative Examples 2 - 1 to 2 - 2, no additive components were used. The results are shown in Table 3. However, the W / P of the cement slurry was as shown in Table 3. Also, Formulations 1 to 4 in Table 1 were used as additives, and the addition amounts were as shown in Table 3. Also, the defoaming agent of component (B) was used in the amounts shown in Table 3 as those in Table 3. In some examples, the high-performance water reducer 1 (Kao Corporation, MIGHTY 21WH) was added in the amounts shown in Table 3 at the time of mixing water and hydraulic powder.

[0081]

Table 3

[0082] In Examples 2-1 to 2-12, the W / P was in the range of 50% or more and 500% or less, the supernatant pH was 11.7 or less, and the P-funnel flow-down time was 51.5 seconds or less, enabling both water non-separability and transportability through a pipe with an inner diameter of 13 mm. On the other hand, Comparative Examples 2-1 and 2-2 that do not contain Component (A) had W / P values of 50% and 500% respectively, and in both cases, the supernatant pH was 12.8 or more, showing poor water non-separability.

[0083] <Examples 3 and Comparative Examples 3> Examples 3-1 to 3-3 were the same as Examples 1-3 to 1-4, except that the addition amounts (as-is) were as shown in Table 4, and cement slurries were prepared and the same evaluations were performed. In Comparative Example 3-1, no additive component was used. Comparative Examples 3-2 to 3-3 were the same as Comparative Examples 1-6 to 1-7, except that the addition amounts were as shown in Table 4, and cement slurries were prepared and the same evaluations were performed. In addition to the P-funnel, the fillability was measured using a J14 funnel (inner diameter of the discharge port: 14 mm, compliant with JSCE-F 531-1993) and a polyvinyl chloride (PVC) pipe (inner diameter: 45 mm, length: 57 cm). When using the PVC pipe, the lower end of the pipe was covered, and the pipe was filled completely with the cement slurry. Then, the cover was removed to let the cement slurry flow out, and the moment when it penetrated from above was taken as the flow-down time. In Table 4, the numbers in parentheses below the funnel or pipe represent the inner diameter of the discharge port. Also, the bleeding rate of the cement slurry after 3 hours was calculated in accordance with JSCE-F 522-2007, the bleeding rate and expansion rate test method for injected mortar of prepacked concrete (polyethylene bag method). The results are shown in Table 4.

[0084]

Table 4

[0085] Examples 3-1 to 3-3 are in the range where the additive addition rate (to water) is from 1.0% to 2.0% (the addition rate of component (A) to water is from 0.3% to 0.6%). The supernatant pH is 11.4 or less, and it is excellent in non-separability in water. Also, when the inner diameter of the pipe is 13 mm, 14 mm, and 45 mm respectively, the flow-down time is short and it has good transferability. On the other hand, Comparative Examples 3-2 and 3-3 containing the slurry modifier used in Patent Document 1 cannot achieve both non-separability in water and transferability in a pipe with an inner diameter of 13 mm, regardless of whether the total addition rate is 1% or 3%. Also, while the bleeding rate of Examples 3-1 to 3-3 is 0.5% or less, the bleeding rate of Comparative Examples 3-1 and 3-2 is 11.0% or more. It can be seen that Examples 3-1 to 3-3 are excellent in transferability and bleeding property even when placed outside water such as on land.

Claims

1. A method for placing a hydraulic composition, which comprises water, hydraulic powder, and (A) an amine oxide surfactant [hereinafter referred to as component (A)], is transported through a pipe with an inner diameter of 50 mm or less and placed into water.

2. The method for placing a hydraulic composition according to Claim 1, wherein the pipe has an inner diameter of 10 mm or more.

3. The method for placing a hydraulic composition according to Claim 1 or 2, wherein the hydraulic composition has a water / hydraulic powder ratio, which is the mass ratio of water to hydraulic powder, of 50% by mass or more and 500% by mass or less.

4. The method for placing a hydraulic composition according to any one of Claims 1 to 3, wherein the hydraulic composition contains two or more kinds of component (A).

5. The method for placing a hydraulic composition according to any one of Claims 1 to 4, wherein the hydraulic composition contains (B) an antifoaming agent.

6. The method for placing a hydraulic composition according to any one of Claims 1 to 5, wherein the hydraulic composition contains (C) an anionic aromatic compound.

7. The method for placing a hydraulic composition according to any one of Claims 1 to 6, wherein the hydraulic composition is transported using a pump connected to the pipe.

8. The method for placing a hydraulic composition according to any one of Claims 1 to 7, wherein the pipe has an inner diameter of 13 mm or more and 45 mm or less.

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