| 摘要 |
<p>PURPOSE:To reuse the ready-mixed concrete sludge as the cement mixing water by separating waste cleaning water contg. ready-mixed concrete from the aggregate, introducing the waste water into a sludge settling tank and separating sludge in the presence of a setting retarder. CONSTITUTION:The waste cleaning water from a device with ready-mixed concrete stuck to it is introduced into an aggregate separation tank to separate the aggregate and then sent to a sludge settling tank to separate sludge. In this case, a setting retarder is added to the cleaning water by 0.01-0.3% based on the water at any spot between a cleaning water outflow passage and the sludge settling tank, the water is allowed to stand, and the ready-mixed concrete sludge is reused as cement mixing water. The sludge is the waste cleaning water from a device with ready-mixed concrete stuck to it and is the waste water contg. unhardened cement and an aggregate discharged from a concrete mixer truck called the agitator truck, a concrete mixer and its attachment when cleaned.</p> |
