On the basis of analysis of the component of the sludge from Ling zhuang waterworks and Dong jiao sewage treatment plant, the technological process for using the sludge as raw material to produce the sludge ceramsite was studied. Through a lot of experiments, the several factors affecting the nature of ceramsite were researched and the technological parameters were confirmed. A performance test of the ceramsite shows that when the optimized temperature is 1 140℃，the optimized baking time is 5 min，the ration of sewage sludge and waterworks sludge is 3∶7，intensity grade of the ceramsite is 40 MPa. The conclusion was gained that the way of sewage sludge and waterworks sludge for ceramsite is feasible and can bring certain economical, social and environmental profits. The products meet the demand on high strength ceramsite in national standard and can be used widely to load bearing structure in construction profession.
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