| 摘要 |
<p>- 14- 154-0090 RECLAIMING OF WASTE CONCRETE A process for reclaiming mixed unused concrete comprising the steps of 1) before the concrete sets, adding a retarder in an amount sufficient to retard hydration for up to an additional 90 hours, 2) optionally, at the end of the desired retardation period, diluting the retarded concrete with fresh concrete, and 3) adding an accelerator to the retarded concrete to restore it to a settable state. 3700/PG/AY/FZ</p> |
