安定化したスラッジ水を練混ぜ水に用いた高性能AEコンクリートの配合設計(<特集>建設材料)

概要

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Authors have been studying for several years as for the effective utilization of sludge water produced in ready mixed concrete olants due to washing of a mixer. agitating truck dram etc. Nowadays, JIS A 5308 oermits the usage under 3 oercent as solids of sludge for the unit content of cement of new concrete. Recently, it is strongly reauested to re-use a further large quantity of sludge water jn order to achieve the zero-emission. Sludge water consists of cement, fine oarticles of aggregate and water. A11 materials are one of the constituents of concrete. This study, in order to utilize the larger quantity of sludge water than that now allowed, is to verify the mix design of concretes containing sludge which has identical slump and compressive strength to comoarative concrete. From the results of this study, it became clear that as for the high-range water reducer concrete containing stabilized sludge within the range of 3-15%, there was no oroblem about slump and comoressive strength. lt was oossible to design the concrete of identical slump and comoressive strength to comoarative concrete. lt was also confirmed that the bulk volume of coarse affereerate was available for the design method of concrete mixture.
2005-08-15