| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement composition having excellent bleeding resistance, which exhibits good flowability when it is applied with shearing force during pump pressure-feeding or the like, but has high thixotropic property (dripping preventing property) even when the amount of water is increased without using a quick-setting agent, and which is less likely to cause bleeding when it is cured and almost free from volume shrinkage after curing. SOLUTION: In a cement composition comprising cement (a) and water (b), the cement composition contains crosslinked acrylic polymer particles (c) and an alkylether-modified cellulose resin (d). In the cement composition, the weight ratios of the contents of respective components are as follows: (a)/(b)=100/40-100/100, (c)/(b)=1/500-1/100, (d)/(b)=1/1,000-1/100, and (c)/(d)=1/1-10/1, and the crosslinked acrylic polymer particles (c) are water-insoluble powder composed of crosslinked acrylic polymer particles containing sulfonic acid group and/or acrylamide group. COPYRIGHT: (C)2008,JPO&INPIT |
