| 摘要 |
<p>A cement composition contains 35-85 % by weight of a cement, 3-15 % by weigh t of a clay, 1-50 % by weight of an aggregate and/or a fibrous material, and 0 .2- 5 % by weight of a high efficiency retarder. A benefit of the present invention is that equipment used to apply cement compositions need not be cleaned every night when used on a construction site.</p> |
