Title:
ADDITIVE FOR CEMENT, CEMENT ADMIXTURE, CEMENT COMPOSITION, MOLDED ARTICLE, AND STRENGTH IMPROVEMENT METHOD FOR MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2020/209057
Kind Code:
A1
Abstract:
Provided is an additive that is for concrete and that, when added to a cement composition, allows the cement composition to have low viscosity and high fluidity during an early period of casting, and that, when added to a cement composition, improves the long-term strength of concrete or the like. This additive for cement contains a water absorbent resin, where the water absorbent resin is obtained by polymerization of a monomer mixture including 50 mol% or more of a nonionic non-crosslinkable monomer and 0.1 mol% or more of a nonionic crosslinkable monomer, and the contained amount of an anionic monomer in the monomer mixture is 20 mol% or less.
Inventors:
TAKAYAMA TAKESHI (JP)
ISHIZAKI KUNIHIKO (JP)
SAKAMOTO SHIGERU (JP)
ISHIZAKI KUNIHIKO (JP)
SAKAMOTO SHIGERU (JP)
Application Number:
PCT/JP2020/013157
Publication Date:
October 15, 2020
Filing Date:
March 24, 2020
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C04B24/26; C04B28/02; C08F220/56
Foreign References:
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Other References:
"Sub-Committee on Test Methods and Specifications for concrete of JSCE Concrete Committee", May 2007, JAPAN SOCIETY OF CIVIL ENGINEERS, article "Standard Specification for Concrete Structures, 2007, Test Methods and Specifications, JSCE Test Methods and Specifications and Related Test Methods and Specifications", pages: 198 - 199
See also references of EP 3954667A4
See also references of EP 3954667A4
Attorney, Agent or Firm:
HATTA & ASSOCIATES (JP)
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