| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a super-hardening cement composition having both excellent fluidity and initial strength development property and excellent in fluidity retentivity under a low temperature atmosphere. <P>SOLUTION: The super-quick hardening cement composition contains super-quick hardening cement (A) composed essentially of calcium aluminate, a polyacrylic acid-based dispersing agent (B) having polyoxyethylene chain and a polyacrylic acid-based dispersing agent (C). The polyacrylic acid-based dispersing agent (B) having the polyoxyethylene chain contains a copolymer having a repeating unit originating from a monomer expressed by general formula (1), (in the formula, R<SP>1</SP>s are the same as or different from each other and each expresses hydrogen atom or an alkyl group, (n) expresses the number of average addition molecules) and a repeating unit originating from a monomer expressed by general formula (2) (in the formula, M expresses hydrogen atom, a monovalent metal atom, a bivalent metal atom, ammonium group or organic amine group). <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
