| 摘要 |
<p>The invention relates to a cement composition containing a shrinkage reducing amount of an alkyl ether derivative of an aliphatic polyhydroxy compound of the formula: Q-[(A)n-OR]x wherein Q is a C3-C12 aliphatic hydrocarbon group (preferably glyceryl), R is hydrogen or C1-C10 alkyl, at least one R being the C1-C10 alkyl group, A is C2-C4 oxyalkylene, n is 0-10, and x is 3-5.</p> |
