利用不同含水率污泥制备复合高性能轻骨料的研究  

Study on using sludge with different moisture contents to make high-performance light-weight composite aggregate

作　　者：元敬顺[1] 石丽娜 阎杰[1] 薛斌[1] 彭婷[1] 

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北张家口市环境监测站,河北张家口075000

出　　处：《混凝土》2016年第8期95-98,共4页Concrete

基　　金：河北省科技厅重点基础研究项目(14963807D)

摘　　要：在确定不同干化程度湿污泥直接与粉煤灰页岩混合制备轻骨料料球的掺量后，研究了不同含水率的污泥对轻骨料性能的影响，分析了导致轻骨料膨胀率、颗粒强度和吸水率变化的原因。结果表明：污泥含水率为60％时，制备料球的直接掺人量可以达到52％，污泥含水率为65％-70％，焙烧温度为1160℃，制备的轻骨料1h吸水率小于2．0％、颗粒强度分别为8．5、8．9MPa，达到高性能轻骨料的要求。After determining the proportion of wet sludge with different degrees of dryness introduced directly into flyash and shale for making light-weight balls, this paper studies the impact of different moisture contents of sludge upon light-weight aggregate performance, and discusses the causes that may explain the variation in expansion ratio, grain strength, and water absorption of light-weight aggregate. The results suggest that：for sludge with a moisture content of 60%, the maximum proportion of introduction could be 52% when making balls;with a moisture content of sludge at 65%-70% and a calcination temperature at 1 160℃, the resulting light-weight aggregate has a water absorption of less than 2.0% at 1 h, its grain strength is 8.5 MPa and 8.9 MPa respectively, satisfying the requirement for high-perfor- mance light-weight aggregate.

关 键 词：湿污泥 含水率 高性能轻骨料 膨胀率 颗粒强度 

分 类 号：TU528.041[建筑科学—建筑技术科学]