초록 ▼

This invention relates to a latex-modified, pretensioned, and prestressed concrete structure having at least about a 50% reduction in bond transfer length as compared to a structure not modified by a latex. Such structure is composed of a cured concrete composition comprising a mixture of (1) portla

This invention relates to a latex-modified, pretensioned, and prestressed concrete structure having at least about a 50% reduction in bond transfer length as compared to a structure not modified by a latex. Such structure is composed of a cured concrete composition comprising a mixture of (1) portland cement, (2) mineral aggregate, and (3) a vinylidene chloride polymer latex, said latex being present in an amount sufficient to provide from about 5 to about 25 percent by weight of polymer solids.

대표청구항 ▼

A latex-modified, pretensioned, and prestressed concrete structure, having at least about a 50% reduction in bond transfer length as compared to a structure not modified by a latex, composed of a cured concrete composition comprising a mixture of (1) portland cement, (2) mineral aggregate, and (3) a

A latex-modified, pretensioned, and prestressed concrete structure, having at least about a 50% reduction in bond transfer length as compared to a structure not modified by a latex, composed of a cured concrete composition comprising a mixture of (1) portland cement, (2) mineral aggregate, and (3) a vinylidene choride polymer latex, said latex being present in an amount sufficient to provide from about 5 to about 25 percent by weight of polymer solids and wherein said vinylidene chloride is an organic interpolymer composed of from about 35 to about 90 parts by weight of vinylidene chloride and from about 65 to about 10 parts by weight of at least one other interpolymerized material of the general formula: [Figure] wherein “R”is selected from the group consisting of hydrogen and the methyl group and “X”is selected from the group consisting of －CN, halogens of atomic numbers 9 to 35, and ester-forming groups, －COOY, wherein “Y”is selected from the group consisting of a primary alkyl group and a secondary alkyl group, each of the foregoing alkyl groups containing from 1 to 18 carbon atoms inclusively.