Abstract
In this paper, using sewage sludge carried out to manufacture high performance ceramsite. At the same time, the performance of concrete made from sewage sludge ceramsite was analyzed. The results show that the ceramist is mainly composed of cristobalite and mullet, and has dense enamel structure on surface and honeycomb closed fine porous structure in internal. Too large ceramsite size can cause concrete strength decrease, poor stability and workability; mineral admixtures make strength and workability of ceramsite concrete improve, but excessive addition could reduce concrete strength particularly in the early stage, so there is a reasonable dosage; ceramsite concrete strength is increased with the decrease of water-cement ratio, the increase of strength is not obvious when water-cement ratio reduced to a certain extent; increasing sand-ratio can improve concrete strength, but have adverse impact on the workability of fresh concrete.
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