| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high-strength cement-based hardened body with less self-shrinkability. <P>SOLUTION: The high-strength cement-based hardened body with a compressive strength of 60 N/mm<SP>2</SP>or higher is the hardened body of a cement composition containing cement, a water reducing agent, an aggregate, water and a self-shrinkage reducing agent for cement comprising the oxyalkylene compounds represented by formula (1): RO-[(EO)<SB>m</SB>/(PO)<SB>n</SB>]-H (wherein R is 8-14C alkyl; EO is oxyethylene; PO is oxypropylene; [(EO)<SB>m</SB>/(PO)<SB>n</SB>] represents, as a whole, the single addition of ethylene oxide or propylene oxide, or block or random addition in combination use regardless of the order of the block addition; m is a number of ethylene oxide average addition moles of 0-10; n is a number of propylene oxide average addition moles of 0-5, provided that the total of m+n is 1-10). <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
