JP2023061318A - Method for transferring hydraulic composition - Google Patents

Abstract

To provide a method for transferring a hydraulic composition, which hardly causes a transfer failure such as adhesion of the hydraulic composition to the inside of piping when the hydraulic composition is transferred using metal piping.SOLUTION: There is provided a method for transferring a hydraulic composition containing water, a hydraulic powder, and a thickener through metal piping in which the thickener is an amine oxide-type surfactant.SELECTED DRAWING: None

Description

The present invention relates to a method for transferring a hydraulic composition.

Hydraulic compositions such as concrete and mortar are used in various fields such as civil engineering and construction. For example, hydraulic compositions are used in the manufacture of underground impermeable walls, underground piles, and the like.
In general, hydraulic compositions contain AE agents, water reducing agents, AE water reducing agents, high performance water reducing agents, and high performance AEs in order to adjust the workability, fluidity, strength, setting time, hardening time, and the like. Various chemical admixtures are used, such as water reducers, superplasticizers, set retarders, and the like.

In Patent Document 1, when concrete mixed with cement, fine aggregate, coarse aggregate and an admixture is poured into the ground to construct a diaphragm wall concrete, an AE water reducing agent is used as the admixture. Alternatively, at least a high-performance AE water reducing agent and a thickener are used, and as the thickener, an aromatic compound having a sulfone group as compound (α) and/or a salt thereof and alkyltrimethylammonium as compound (β) A method for constructing a diaphragm wall concrete is disclosed in which concrete is placed into the ground with a slump flow of 350 mm or more using salt.

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

Patent Document 3 discloses that a concrete composition containing an alkylamine oxide having 8 to 22 carbon atoms in the alkyl group and a superplasticizer has a concrete slump flow value (spread measured according to JIS-A 1101) of 50 cm or more. Certain self-compacting concrete compositions are disclosed.

Moreover, the hydraulic composition is often transported from the place where it was prepared to the place where it is used. In this case, for example, an apparatus equipped with means for supplying, transporting, and discharging the hydraulic composition is used.

In Patent Document 4, in a mortar supply base having a raw material tank, a kneader, a pumping pump, etc., cement and water and/or fillers such as clay sand, china clay, sand, etc. are kneaded to form a mortar paste, which is pumped. The mortar paste is pressure-fed and supplied to the foaming and kneading unit by the pressure-feeding pump through a pipe connecting the pump and a foaming and mixing unit movably installed at a position close to the air mortar injection construction site. A foaming agent and compressed air are introduced from a foaming agent supply device and a compressed air supply source separately installed in the mixer, and continuously mixed with the mortar paste to prepare air mortar, and at the discharge side of the mixer. There is disclosed an air mortar injection method for long-distance pumping, characterized in that the air mortar is continuously injected into the injection site through a connected injection hose.

Patent Document 5 discloses a slurry supply device that supplies slurry stored in a slurry storage part by adjusting the flow rate, and stores a comparison liquid for measurement whose properties that affect pump delivery are the same as the slurry. an interlocking pump that pumps out a comparison liquid storage section, the slurry stored in the slurry storage section, and the measurement reference liquid stored in the comparison liquid storage section under the same conditions through separate systems; A slurry supply device is disclosed which is characterized by having a comparison liquid flow meter for measuring the delivery flow rate of the measurement comparison liquid.

Patent Document 6 discloses a concrete transport pipe characterized by having a non-rotating resistor extending from the inner wall of the pipe into the pipe to resist the flow of concrete within the pipe. there is

Patent Document 7 discloses a method for pumping a cement-based material having inseparability in water inside a pipe, in which a material having a viscosity higher than that of the cement-based material is introduced into the pipe through an injection pipe. A method for pumping an inseparable material in water, comprising the steps of injecting a low liquid and causing the injected liquid to adhere to the inner surface of the pipe to form a lubricating layer on the inner surface is disclosed.

Japanese Patent Application Laid-Open No. 2006-2347 JP 2020-76022 A JP-A-8-133805 JP-A-59-154297 JP 2014-228509 A JP 2019-120074 A JP 2020-203744 A

As a hydraulic composition, a water-insoluble hydraulic composition is known which causes less material separation in water. In general, imparting inseparability in water to a hydraulic composition is achieved by adding a thickener or the like.
On the other hand, pipes made of metal such as stainless steel and plastic such as fluororesin are known as pipes used for transporting the hydraulic composition. However, when a hydraulic composition containing a thickening agent is passed through a metal pipe, the hydraulic composition sometimes adheres to the inside of the pipe, causing transport failure.

INDUSTRIAL APPLICABILITY The present invention provides a method for transporting a hydraulic composition, in which transport failure such as adhesion of the hydraulic composition to the inside of the pipe is less likely to occur when the hydraulic composition is transported using a metal pipe.

The present invention relates to a method for transporting a hydraulic composition containing water, hydraulic powder and a thickening agent through a metal pipe, wherein the thickening agent is an amine oxide surfactant. The present invention relates to a method for transferring a hydraulic composition.

According to the present invention, there is provided a method for transferring a hydraulic composition in which, when transferring a hydraulic composition using a metal pipe, transfer failure such as adhesion of the hydraulic composition to the inside of the pipe is less likely to occur. .

In the present invention, the coexistence of the amine oxide surfactant in the hydraulic composition significantly suppresses transport failure when the hydraulic composition is transported through a metal pipe.
Polymer-based thickeners are known as thickeners for hydraulic compositions. A hydraulic composition using a polymer-based thickener has a significantly increased viscosity, and therefore adheres to the surface of an object with a thickness. The hydraulic composition thickened by this method is also used, for example, for plastering. A thickener is also used to impart non-separability in water to the hydraulic composition.
On the other hand, surfactant-based thickeners are also known as thickeners for hydraulic compositions. A hydraulic composition using a surfactant-based thickener has a lower viscosity than a hydraulic composition using a polymer-based thickener, so it is difficult to laminate on an object. is strongly ionic and tends to be electrostatically adsorbed to the metal surface, it is thought that the hydraulic composition also increases the adhesion to objects.
On the other hand, the amine oxide type surfactant used in the present invention is considered to be weak in ionicity and difficult to be electrostatically adsorbed. It is considered that adhesion can be suppressed. Furthermore, it is believed that the fluidity of the hydraulic composition is unlikely to change even after it has been pumped for a predetermined distance in order to suppress adhesion to metal pipes.

First, the hydraulic composition according to the present invention will be explained.
Water can be tap water, river water, lake water, or the like.

Hydraulic powder is powder that hardens when mixed with water. Ecocement (for example, JIS R5214 etc.) is mentioned. Among these, cement selected from early-strength Portland cement, ordinary Portland cement, sulfuric acid-resistant Portland cement, and white Portland cement is preferable from the viewpoint of shortening the time required for the hydraulic composition to reach the required strength. Cements selected from Portland cement and ordinary Portland cement are more preferred.

The hydraulic powder may include blast furnace slag, fly ash, silica fume, anhydrous gypsum and the like, and may also include non-hydraulic limestone fine powder and the like. As the hydraulic powder, blast furnace cement, fly ash cement, and silica fume cement, which are mixtures of cement with blast furnace slag, fly ash, silica fume, and the like, may be used. Moreover, clay such as bentonite may be contained within a range that does not impair the effects of the present invention.

In the present invention, an amine oxide surfactant [hereinafter referred to as component (A)] is used as a thickening agent.
The (A) component amine oxide surfactant may be a surfactant having an amine oxide group. Amine oxide surfactants include, for example, amine oxides having one hydrocarbon group having 8 or more carbon atoms, 14 or more carbon atoms, and 22 or less carbon atoms. Component (A) includes compounds represented by the following general formula (1).

[In the formula,
X is a group represented by R ^1a or R ^1b -[CONH-CH ₂ CH ₂ CH ₂ ] _n -.
R ^1a is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms.
R ^1b is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms.
n is an integer of 1 or more and 3 or less.
R ² and R ³ are each independently an alkyl group having 1 to 4 carbon atoms or a group represented by —(C ₂ H ₄ O) _pH H. p is the average number of added moles, and the sum of R ² and R ³ is 0 or more and 5 or less. ]

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 are different in X in the general formula (1),
At least one of the two or more compounds is a compound in which R ^1a or R ^1b of X in general formula (1) is an alkenyl group,
is preferred. This aspect will be described below.

Regarding the compound (1), when X in the general formula (1) is different, the following aspects are mentioned, for example, considering the case where there are two types of compounds (1). In the following embodiments, R ^1a or R ^1b of at least one of the two compounds (1) is an alkenyl group.
(i) one R ^1a or R ^1b is an alkyl group and the other R ^1a or R ^1b is an alkenyl group;
(ii) The number of carbon atoms in one R ^1a or R ^1b is different from the number of carbon atoms in the other R ^1a or R ^1b .
(iii) one X is R ^1a and the other X is R ^1b —[CONH—CH ₂ CH ₂ CH ₂ ] _n —;
(iv) both Xs are R ^1b —[CONH—CH ₂ CH ₂ CH ₂ ] _n —, and n of one is different from n of the other;
(v) a combination of (i) to (iv) above;

In general formula (1), X is a group represented by R ^1a or R ^1b -[CONH-CH ₂ CH ₂ CH ₂ ] _n -.
R ^1a is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms.
When R ^1a is an alkenyl group, it preferably has 18 or more carbon atoms and preferably 22 or less carbon atoms.
When R ^1a is an alkyl group, it preferably has 16 or more carbon atoms and preferably 22 or less carbon atoms.
R ^1b is an alkyl group having 13 to 21 carbon atoms or an alkenyl group having 13 to 21 carbon atoms.
When R ^1b is an alkenyl group, the number of carbon atoms is preferably 17 or more and preferably 21 or less.
When R ^1b is an alkyl group, it preferably has 15 or more carbon atoms and preferably 21 or less carbon atoms.
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 or more and 2 or less carbon atoms or a group represented by (C ₂ H ₄ O) _pH H.
p is preferably a number of 0 or more and 3 or less.

In the present invention, 2 or more, preferably 5 or less, more preferably 2, compounds (1) with different Xs in the general formula (1) are used. 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 of X in general formula (1) is an alkenyl group having 14 or more and 22 or less carbon atoms, that is, the general formula It is a compound containing an alkenyl group having 14 or more and 22 or less carbon atoms as R ^1a or an alkenyl group having 13 or more and 21 or less carbon atoms as R ^1b in X in (1).

In the present invention, there are two types of compounds (1), and one of the two types of compounds (1) including the above (i) to (v) is one in which X in general formula (1) is R ^1a Moreover, it is preferably an alkenyl group compound having 14 or more and 22 or less carbon atoms. That is, the component (A) is two kinds of compounds represented by the general formula (1), and the two kinds of compounds have different Xs in the general formula (1), and the two kinds of compounds Of these, one is preferably a compound in which X in general formula (1) is R ^1a and R ^1a is an alkenyl group.

As component (A), X in general formula (1) is a group represented by R ^1a or R ^1b —[CONH—CH ₂ CH ₂ CH ₂ ] _n — (wherein R ^1a has 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 the compound (1a) A combination of
Specific examples of the component (A) include a combination of a compound (1a) represented by the following general formula (1a) and a compound (1b) represented by the following general formula (1b).

[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 an alkenyl group having 13 to 21 carbon atoms when n1 is 1 to 3.
R ^11b is an alkyl group having 14 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms when n2 is 0, and an alkyl group having 13 to 21 carbon atoms when n2 is 1 to 3 or It is an alkenyl group having 13 or more and 21 or less carbon atoms.
However, when n1 and n2 are the same number, 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 to 4 carbon atoms or a group represented by —(C ₂ H ₄ O) _pH H. p is the average number of added moles, and the sum of R ² and R ³ is 0 or more and 5 or less. ]

In general formula (1a), the carbon number 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.

In general formula (1b), when n2 is 0 and R ^11b is an alkyl group, the number of carbon atoms in 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 carbon number 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 in 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 in R ^11b is preferably 17 or more and preferably 21 or less.
In general formula (1b), R ^11b is preferably an alkyl group.
In general formula (1b), n2 is preferably 0 or 1.

In 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 -(C ₂ H ₄ O) _pH , and more preferably an alkyl group having 1 or 2 carbon atoms.
In 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 .

The (A) component of the present invention includes a combination of a compound (11a) represented by the following general formula (11a) and a compound (1b) represented by the following general formula (1b).

[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 to 22 carbon atoms or an alkenyl group having 14 to 22 carbon atoms when n2 is 0, and an alkyl group having 13 to 21 carbon atoms when n2 is 1 to 3 or It is an alkenyl group having 13 or more and 21 or less carbon atoms.
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 to 4 carbon atoms or a group represented by —(C ₂ H ₄ O) _pH H. p is the average number of added moles, and the sum of R ² and R ³ is 0 or more and 5 or less. ]

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

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

In the present invention, when a hydraulic composition containing water and hydraulic powder is transported using a metal pipe, (A) an amine oxide surfactant is allowed to coexist with the hydraulic composition, and the metal Reduces adhesion of hydraulic composition to the inside of piping.

The hydraulic composition according to the present invention has a water/hydraulic powder ratio (hereinafter sometimes referred to as W/P) of, for example, 30% by mass or more, further 40% by mass or more, and further 50% by mass or more. , 60% by mass or more, 65% by mass or more, 70% by mass or more, and 200% by mass or less, 150% by mass or less, and 100% 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 of hardening by hydration reaction. In addition, the hydraulic powder is selected from powder having a physical property of hardening by hydration reaction such as cement, powder having pozzolanic action, powder having latent hydraulic property, and stone powder (calcium carbonate powder). When powders are included, their amount is also included in the amount of hydraulic powder in the present invention. In addition, when the powder having the physical property of hardening by 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 parts and the like related to the mass of the hydraulic powder.

From the viewpoint of reducing the adhesion of the hydraulic composition to the metal pipe, the component (A) is, for example, 0.001% by mass or more, further 0.005% by mass or more, and further 0 0.01% by mass or more, further 0.1% by mass or more, and from the viewpoint of economy, 10% by mass or less, further 8% by mass or less, further 5% by mass or less, and further 1% by mass or less. .

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, relative to the water in the hydraulic composition. , more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, and even more preferably is used in an amount of 8% by mass or less, more preferably 5% by mass or less, and even more preferably 1% by mass or less.

When compound (1a) and compound (1b) are used as component (A), compound (1a) is preferably 0.00095% by mass or more, more preferably 0.00095% by mass or more, more preferably 0.00095% by mass or more, based on water in the hydraulic composition. 0075% by mass or more, more preferably 0.035% by mass or more, still more preferably 0.06% by mass or more, and preferably 3.75% by mass or less, more preferably 3% by mass or less, and still more preferably 2. It is used in an amount of 8% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less.
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, more preferably 0.015% by mass or more, still 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 It is used in an amount of 7% by mass or less, more preferably 5.2% by mass or less, and even more preferably 3% by mass or less.

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

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

The hydraulic composition according to the present invention preferably contains (B) an antifoaming agent [hereinafter referred to as component (B)].
From the viewpoint of antifoaming properties, component (B) is preferably polysiloxane, polyoxyethylene polyoxypropylene, polypropylene oxide and derivatives thereof (polyoxypropylene, polyoxypropylene glyceryl ether, etc.), acetylene glycol and derivatives thereof ( acetylene glycol, alkylene oxide adducts of acetylene glycol, etc.), polyoxyalkylene fatty acid esters, polyoxyalkylene alkyl ethers, polyoxyalkylene alkylamides, trialkyl phosphates, and one or more compounds selected from alcohols be. More preferred are these compounds, which are insoluble in water.

Polysiloxane includes polysiloxane, dimethylpolysiloxane, polyhydroxymethylsiloxane, and the like.

Polyoxyethylene polyoxypropylene includes polyoxyethylene polyoxypropylene random polymer, polypropylene oxide-polyethylene oxide-polypropylene oxide block polymer, and the like. From the viewpoint of antifoaming properties, the weight average molecular weight of these is preferably 2,000 or more and 100,000 or less.

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

Acetylene glycol and derivatives thereof include acetylenol E00, acetylenol E13 (all from Kawaken Fine Chemicals Co., Ltd.), DYNOL (registered trademark) 604, SURFYNOL (registered trademark) 440, SURFYNOL (registered trademark) 104, and SURFYNOL (registered trademark). 2502, SURFYNOL (registered trademark) 420, and SURFYNOL (registered trademark) DF-75 (both of which are manufactured by Air Products and Chemicals). Derivatives of acetylene glycol include alkylene oxide adducts of acetylene glycol. From the viewpoint of defoaming properties, the average number of added moles of alkylene oxide is preferably 1 or more and 100 or less. Alkylene oxide is preferably propylene oxide.

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

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

Examples of polyoxyalkylenealkylamides 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 added moles of alkylene oxide is preferably 1 or more and 100 or less. Moreover, from the same point of view, the alkylene oxide is preferably propylene oxide.

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

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

Suitable examples of antifoam agents include polysiloxanes such as SAG™ 672, SAGTEX™ DSA (both from Momentive Performance Materials, Inc.), polyoxyalkylene fatty acid esters, polyoxyalkylene alkyl ethers. , or as polyoxyalkylene alkylamides, polypropylene glycol lauryl ether, polypropylene glycol myristyl ether and mixtures thereof, propylene oxide/ethylene oxide adducts of oleic acid, SN Deformer 260 (trademark), SN Deformer 265 (trademark), SN Deformer 466 (trademark) (both San Nopco Co., Ltd.), antifoaming agent NO. 21 (trademark), Antifoam No. 8 (trademark) (both from Kao Corporation) as acetylene glycol, DYNOL (trademark) 604 and SURFYNOL (registered trademark) 440 as trialkyl phosphate, tributyl phosphate and triisobutyl phosphate as alcohol, 2-ethylhexanol, as polyoxyethylene polyoxypropylene, Nieupol PE-61 (trademark), Nieupol PE-71 (trademark) (both Sanyo Kasei Co., Ltd.), and polyoxypropylene with a molecular weight of 2 ,000 to 100,000 polypropylene glycols.

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

When the hydraulic composition according to the present invention contains component (B), the composition preferably contains component (B) in an amount of 0.001% by mass or more, more preferably 0% by mass, based on component (A). 0.01% by mass or more, more preferably 0.1% by mass or more, preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less.

The hydraulic composition according to the present invention can contain (C) an anionic aromatic compound. Component (C) includes one or more compounds selected from sulfonic acids having an aromatic ring, carboxylic acids having an aromatic ring, phosphonic acids having an aromatic ring, and salts thereof. The anionic aromatic compound preferably has a total carbon number of 6 or more and 12 or less as an acid type compound. Specific examples of anionic aromatic compounds 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, methylsalicylic acid, styrenesulfonic acid, chlorobenzoic acid and the like. These may form salts. Two or more kinds of 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, and salts thereof.

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

The hydraulic composition according to the present invention contains, for example, a dispersant, an AE agent, a retarder, a foaming agent, a thickener, a foaming agent, a waterproofing agent, a fluidizing agent, etc., within a range that does not affect the effects of the present invention. Ingredients can optionally be included. The hydraulic composition preferably contains a dispersant. The dispersant is not particularly limited, and dispersants commonly used in hydraulic compositions such as polycarboxylic acid dispersants, polyether dispersants, naphthalene dispersants, and melamine dispersants can be used. Available. Dispersants are sometimes used as water reducing agents, high performance water reducing agents, high performance AE water reducing agents, and the like. The dispersant is preferably a polycarboxylic acid-based dispersant or a polyether-based dispersant. A dispersant can be used in a known addition amount in a hydraulic composition.

Optional components such as component (B) and component (C) are added to the hydraulic composition in advance, added when component (A) is added, or added after component (A) is added. You can Moreover, it can also be used as a composition containing the component (A) and optional components such as the component (C).

The hydraulic composition according to the present invention may contain aggregate. Aggregates include fine aggregates, coarse aggregates, and the like. Fine aggregates are preferably mountain sand, land sand, river sand, and crushed sand, and coarse aggregates are preferably mountain gravel, land gravel, river gravel, and crushed stone. Depending on the application, lightweight aggregate may be used. The term "aggregate" is based on "Concrete Overview" (June 10, 1998, published by Gijutsu Shoin).

The hydraulic composition according to the invention may be inseparable in water. The fact that the hydraulic composition is inseparable in water means, for example, the underwater inseparability test method for underwater inseparable concrete described in the Guidelines for Design and Construction of Inseparable Concrete in Water (Draft) issued by the Japan Society of Civil Engineers. It may be determined that the inseparability in water is good (pH of the supernatant is less than 12) according to. In the present invention, even a hydraulic composition that has been thickened to a level that is inseparable in water can be transported with reduced transport obstacles by combining it with a metal pipe.

The material, shape, length, and the like of the metal pipe used in the present invention can be appropriately set based on the use of the hydraulic composition, transfer conditions (eg, distance, shape to transfer point, etc.). The material of the metal pipe may be, for example, metal selected from stainless steel, aluminum and cast iron.

The inner diameter of the metal pipe used in the present invention is, for example, 10 mm or more, further 13 mm or more, further 15 mm or more from the viewpoint of pumpability, and 200 mm or less, further 100 mm or less, further 50 mm or less from the viewpoint of economy and productivity. you can
From the viewpoint of economy and productivity, the minimum inner diameter of the metal pipe used in the present invention may be, for example, 200 mm or less, 100 mm or less, or 50 mm or less.
In addition, the length of the metal pipe used in the present invention is preferably 2 m or longer, more preferably 5 m or longer, and still more preferably 10 m or longer, from the viewpoint of suppressing adhesion to metal. From the point of view, it may be preferably 100 m or less, more preferably 50 m or less, and even more preferably 20 m or less.

Metal pipes used in the present invention include metal pipes installed in various devices that handle hydraulic compositions such as mortar and concrete, and metal pipes connected to the above devices. Examples of the device include an injection device, a mortar pump, a spray device, and a slurry supply device. These devices include, for example, hydraulic composition storage means (raw material tank, storage tank, hopper, etc.), hydraulic composition mixing means (mixer, etc.), hydraulic composition transfer means (pump, etc.), measuring It includes means (such as a flow meter) and the like, and each means is connected by piping as required. The pipes made of metal can be used in the present invention. In some cases, these means are provided with pipes, and the pipes made of metal can be used in the present invention. In the present invention, the hydraulic composition according to the present invention can be passed while being in contact with the inner wall of the metal pipe, that is, the metal portion.

INDUSTRIAL APPLICABILITY The present invention can be used in various works involving transfer of a hydraulic composition, such as soil improvement, production of secondary products, and repair of structures. For example, a hydraulic composition supplemented with metal tubing can be released into water. As a result, casting is performed underwater, and the intended work can be accomplished. In addition, it can be applied when used for ground improvement such as ground improvement for the purpose of improving the foundation ground of houses, for example, columnar ground reinforcement method (also called soil cement column method). It can also be used as a construction method for preventing ground collapse and stabilizing ground and bedrock after excavation.

[Ingredients Used]
(1) Water Tap water (2) Hydraulic powder Ordinary cement (manufactured by Taiheiyo Cement Co., Ltd.)
(3) (A) component oleyl dimethylamine oxide oleamide propyl dimethylamine oxide (4) (B) component Antifoaming agent 1: Pronal CA-3000 manufactured by Toho Chemical Industry Co., Ltd.
(5) Component (C) Sodium m-xylenesulfonate (6) Admixture Commercially available admixture: Kao Corporation, Mighty 21WH

[Thickener]
Formulations 1 to 3: Thickeners obtained by combining components (A) and (C) as shown in Table 1 (% in Table 1 is mass%)
Commercially available thickener 1: Asukaclean (water-soluble cellulose ether) manufactured by Shin-Etsu Chemical Co., Ltd.
Commercially available thickener 2: Kao Corporation, Visco Top 200LS-2 (alkylallylsulfonate, alkylammonium salt)

<Example 1 and Comparative Example 1>
(1) Examples 1-1 to 1-4, Comparative Examples 1-1 to 1-2
1800 g of cement, 1440 g of water and, if necessary, admixtures were added to a 5-liter plastic bucket and stirred for 30 seconds with a cooking hand mixer. When the amount of air exceeded 5%, defoaming agent 1 was appropriately added so that the amount of air was less than 5%. Thereafter, predetermined amounts of the thickener and admixture shown in the table were added, and the mixture was stirred for 1 minute to obtain a cement slurry. The obtained cement slurry was subjected to a prescribed test immediately after preparation. The addition amount of each thickener used in Example 1 and Comparative Example 1 is an amount that expresses inseparability in water (as is), and Comparative Example 1-1 is the recommended addition amount in the catalog, Example 1-2 was prepared with the minimum amount capable of exhibiting inseparability in water. Regarding the presence or absence of underwater inseparability, it was tested according to the underwater inseparability test method for underwater inseparable concrete described in the guidelines for design and construction of underwater inseparable concrete (draft) issued by the Japan Society of Civil Engineers. According to the above, it was confirmed that the pH of the supernatant was less than 12, which is judged to be good inseparability in water.

[evaluation]
(1) Amount Adhering to Metal Piping A P funnel, a stainless funnel, and a mortar flow cone were used as models of metal piping for transfer. For reference, a PTFE (polytetrafluoroethylene) funnel was used as a plastic piping model, and the adhesion amount was measured when the cement slurry was passed through the funnel. The adhesion amount of each funnel was measured as follows.

(1-1) Measurement of adhesion amount to P funnel JSCE-F 521-1999 Immediately after measuring the flow time of cement slurry according to "Prepacked concrete injection mortar fluidity test method (method using P funnel)" The bottom was closed and the total mass was measured. The mass of the pre-measured P funnel tester (manufactured by Marui Co., Ltd.) was subtracted to obtain the adhesion amount.

(1-2) Measurement of adhesion amount to stainless steel funnel A cone-shaped funnel (outlet diameter 20 mm, upper diameter 103 mm, height 277 mm) made by processing stainless steel was filled with cement paste and the bottom was closed. It was made to flow down by pulling out the cap. As soon as the light on the opposite side was seen from the outlet when looking from the top, the bottom was immediately closed and the mass of the whole was measured. The mass of the funnel, which was measured in advance, was subtracted to obtain the adhesion amount.

(1-3) Measurement of adhesion amount to mortar flow cone Immediately after filling a cast iron mortar flow cone with cement slurry and pulling out the flow cone according to the procedure for measuring the flow in accordance with JIS R 5201, Then, the weight of the flow cone, which had been measured in advance, was subtracted to obtain the adhesion amount.

(1-4) Measurement of the amount of adhesion to the PTFE funnel A PTFE funnel manufactured by AS ONE (diameter φ156 mm x leg outer diameter φ18 mm x leg length 80 mm) was filled with cement slurry to the full level, and immediately after all the contents flowed down. The bottom was plugged and the total mass was measured. The mass of the funnel itself, which was measured in advance, was subtracted to obtain the adhesion amount.

(3) Flow Time and Flow Velocity Test in Metal Piping A stainless steel pipe having an inner diameter of 18 mm and a length of 1 m was placed vertically, and after the lower end was closed, the cement slurry was leveled and filled into the pipe. After removing the blockage at the bottom end, the flow time was defined as the moment when light was seen from the bottom end when viewed from above. A stainless steel pipe with an inner diameter of 18 mm and a length of 2 m was also tested in the same way. The flow velocity was the value obtained by dividing the length of the pipe by the flow time.

Regarding the adhesion amount of the metal funnel, in Examples 1-1 to 1-4, the adhesion amount to the metal pipe was 39 g or less for the aluminum P funnel, 29 g or less for the stainless steel funnel, and 28 g or less for the cast iron flow cone. On the other hand, in Comparative Example 1-1, the aluminum P funnel was 81 g, the stainless steel funnel was 176 g, and the cast iron funnel was 49 g. In addition, in Comparative Example 1-2, the weight of the aluminum P funnel was 75 g, which was a large amount.
In addition, with regard to the flowing time of metal pipes of lengths 1 m and 2 m, Examples 1-1 to 1-4 had high flow velocities, and the flow velocities did not significantly deteriorate even in 2 m pipes, and excellent pumpability was obtained. However, in Comparative Example 1-1, the flow velocity was slow, and the flow velocity did not change even when the length was changed. In Comparative Example 1-2, the flow velocity of 1 m was higher than that of Comparative Example 1-1, but the flow velocity significantly deteriorated when a 2 m stainless steel pipe was used.
Thus, even with cement slurries having the same level of resistance to underwater separation, cement slurries containing the component (A) adhere less to metal pipes, and even if the length of metal pipes increases, the flow velocity increases. It can be seen that stable transportation is possible. This is an effect that a person skilled in the art could not predict from the underwater separation resistance of the hydraulic composition.

<Example 2 and Comparative Example 2>
A cement slurry was prepared in the same manner as in Example 1 and Comparative Example 1, and the same evaluation was performed.
However, the water/hydraulic powder ratio (W/P) of the hydraulic composition was as shown in Table 3, and the adhesion amount was evaluated by measuring the adhesion amount to the P funnel.
In addition, the cement slurry was evaluated for pumpability, fluidity, non-separability in water, and compressive strength by the following methods. Compressive strength was evaluated for Examples 2-2- and 2-3.

(1) Pumpability (viscosity)
The viscosity of the cement slurry was measured at 20° C. with a Brookfield viscometer (VISCOTESTER VT-04E manufactured by RION Co., Ltd., rotor No. 1, rotation speed: 62.5 rpm) and used as an index of pumpability.

(2) Fluidity The flow value (80×80) of the cement slurry was measured according to the Japan Highway Public Corporation standard "Testing method for air mortar and air milk (JHS.A 3113-1992)".
In addition, as a flow distance in the air, cement slurry was filled from the left end using a funnel (made of polypropylene) so that the height of the toe was 5 cm from the bottom into a water tank with a memory (PWS6020) manufactured by AS ONE. After 5 minutes, the distance flowed to the right was measured.
In addition, as an underwater flow distance, a water tank with a memory (PWS6020) manufactured by AS ONE Corporation is filled with 5 L of water in advance, and the left end is measured using a funnel (made of polypropylene) so that the height of the toes is 5 cm from the bottom. After 5 minutes, the cement slurry was filled into water, and the distance flowed to the right was measured.

(3) Inseparability in Water In the evaluation of fluidity in (2) above, the supernatant liquid after measuring the fluidity distance in water was collected, and the pH and turbidity were measured. Turbidity was measured with a turbidity meter (TN100 manufactured by Nikko Hansen).

(4) Compressive strength (4-1) 24-hour strength Compressive strength (in air) for 24 hours was measured according to JIS A 1108. Three specimens were produced, and the average value of the three specimens was adopted as the 24-hour strength.

(4-2) 28-day strength The 28-day strength in air and water was measured according to JSCE-D 104. A plastic mold having an inner diameter of 50 mm and a height of 100 mm was used as a specimen, and three specimens were prepared in air and water, respectively, and the average value of the three specimens was adopted as the 28-day strength.

The cement slurry containing the amine oxide type surfactant according to the present invention has a small amount of adhesion to metal pipes, has excellent fluidity and water separability even when placed in water, and has a high strength during hardening in the air. It can be seen that there is no significant decrease compared to the case of

Claims (7)

A method for transferring a hydraulic composition containing water, hydraulic powder and a thickening agent through a metal pipe, wherein the thickening agent is an amine oxide surfactant. A method of transporting the composition. 2. The method for transferring a hydraulic composition according to claim 1, wherein the material of the metal pipe is a metal selected from stainless steel, aluminum and cast iron. 3. The method for transferring a hydraulic composition according to claim 1, wherein the metal pipe has a length of 2 m or more. The method for transferring a hydraulic composition according to any one of claims 1 to 3, wherein the hydraulic composition that has passed through the metal pipe is discharged into water. The water according to any one of claims 1 to 4, wherein the hydraulic composition has a water/hydraulic powder ratio, which is the mass ratio of water and hydraulic powder, of 30% by mass or more and 200% by mass or less. A method for transferring a hard composition. The method for transferring a hydraulic composition according to any one of claims 1 to 5, wherein the minimum inner diameter of the metal pipe is 200 mm or less. The method for transferring a hydraulic composition according to any one of claims 1 to 6, wherein the hydraulic composition is an inseparable hydraulic composition in water.