| Title |
Effects of Mixing Basin Facilities for Stable Reuse of Sludge Water of Ready Mixed Concrete |
| Authors |
Lee Mun-Hwan ; Lee Sea-Hyun ; Park Young-Shin ; Park Jae-Myung |
| Keywords |
sludge water ; by-production ; recycling water ; air diffusion ; Impeller |
| Abstract |
Using the sludge water in producing ready mixed concrete, which is generated as washing surplus concrete after completing manufacturing and transportation of concrete??is the best method in meeting the issue of cost of production and environment. However, in reality, using sludge water decreases quality, and solid ingredients adhere to the transportation line of sludge water and the basin of sludge water, agitated to prevent precipitation of sludge, which incurs tremendous amount of repair expenses. In order to resolve the problems above, we have studied stable methods of supplying sludge water and experimentally reviewed the types of facilities. The result showed that a facility that added stabilizing agents which retarded hydration of unhydrated cement in sludge water for certain periods (2∼3 days) and simultaneously agitated and moved by air diffusion and vertical flat blade impeller was most effective in stabilizing concentration of solid and preventing precipitation of solid in the bottom of basin. In addition, the performance of agitation and prevention of adherence of reaction basin of sludge water depended on selective efficiency of sand grain |