KR850001520A - Concrete composition for underwater construction - Google Patents

Abstract

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Description

Concrete composition for underwater construction

As this is a public information case, the full text was not included.

Claims (9)

An underwater concrete composition comprising a vinyl-based water-soluble polymer comprising a vinyl-based unit having a sulfonic acid group in an amount of about 0.01-4% by weight of cement. Vinyl-based units having sulfonic acid groups are of the general formula [Ⅰ] [Wherein R ¹ represents a hydrogen atom or a lower alkyl group, A represents -CH _2- , -CONHCH _2- , (R ² and R ³ are the same or different and represent a hydrogen atom or a lower alkyl group) or , N represents an integer of 0 or 1, M represents a hydrogen atom, an alkali metal or ammonium.] In the water of claim 1, which is a vinyl-based water-soluble polymer comprising a unit represented by Common concrete composition. In the vinyl-based water-soluble polymer including the unit represented by the formula [I], structural units other than the vinyl-based unit having a sulfonic acid group are represented by the general formula [II]. Vinyl-based water-soluble polymer represented by [wherein R ₄ represents a hydrogen atom or a lower alkyl group, B represents -CONH ₂ or -COOR ₅ (R | ₅ represents a lower alkyl group, a lower hydroxy alkyl group)] The concrete composition for underwater construction of claim 1 substrate. Vinyl-based water-soluble polymers containing vinyl-based units having sulfonic acid groups are of general formula [III]. An acrylic monomer represented by formula (IV) wherein R ¹ , R ² and R ³ are the same or different and represents a hydrogen atom or a lower alkyl group, and M represents a hydrogen atom, an alkali metal or ammonium. The concrete composition for underwater construction of Claim 1 which is an opaque compound for acryl count obtained by superposing | polymerizing with the acryl-type monomer represented by (wherein, R <^4> represents a ₂ hydrogen atom or a lower alkyl group). Patent of the acrylic water-soluble molecular compound obtained by polymerizing 3-95 mol% of the acrylic monomer represented by the general formula [III] with 97-5 mol% of the acrylic monomer represented by the general formula [IV] The concrete composition for underwater construction of claim 4. Vinyl-based water-soluble polymers containing vinyl-based units having sulfonic acid groups are of general formula [III]. Wherein the R ¹ , R ² and R ³ are the same or different and represent a hydrogen atom or a lower alkyl group and M represents a hydrogen atom, an alkali metal or ammonium. Wherein R ⁴ represents a hydrogen atom or a lower alkyl group, R ⁶ and R ⁷ are the same or different and are a lower alkyl group or one of hydrogen and a lower alkyl group. R ⁶ and R ⁷ represent nitrogen to which they are bonded. Underwater construction concrete according to claim 1, which is an acrylic water-soluble high molecular compound obtained by polymerizing with an acrylic monomer represented by combining with or without an oxygen atom, such as an atom, to form a 5 or 6 membered ring. Composition. For underwater construction of claim 6, wherein the acrylic water-soluble polymer compound is an acrylic water-soluble polymer compound having a molecular weight of 1 million or more obtained by polymerizing an acrylic monomer represented by general formula [III] with an acrylic monomer represented by general formula [V]. Concrete composition. Underwater construction where 3-95 mol% of 2-acrylamide-2-methylfurophan sulfonic acid soda is polymerized with 97-5 mol% of acrylamide, and 0.1-4% of the weight of cement is mixed with an acrylic water-soluble polymer compound having a molecular weight of 1 million or more. Concrete composition for 0.1-4 weight of the acryl-based water-soluble high molecular compound of 1 million or more molecular weight obtained by superposing | polymerizing 3-95 mol% of 2-acrylamide- 2-methylfurophan sulfonate with 97-5 mol% of N, N- dimethyl acrylamide Concrete composition for underwater construction blended%. ※ Note: The disclosure is based on the initial application.