| 摘要 |
<p>A cement composition which comprises 100 parts by weight of a cement, 0.01 to 0.1 part by weight of fibrillar polytetrafluoroethylene, and 0.001 to 1.0 part by weight of an alcoholic antifoamer and/or silicone antifoamer, is less apt to dust, and gives concrete or hardened mortar having improved strength.</p> |
