利用城市污水处理厂污泥生产生态水泥  

Utilizing the Wastewater Treatment Plant Sludge for the Production of Ecocement

作　　者：林奕明[1] 周少奇[1] 周德钧[1] 吴彦瑜[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广州510006

出　　处：《环境科学》2011年第2期524-529,共6页Environmental Science

基　　金："十一五"国家科技支撑计划项目(2008BAE64B05);广州市重大科技项目(2008DLB2080500)

摘　　要：使用城市生活污水处理厂污泥作为水泥熟料煅烧过程中的添加剂,并以生产标号为P.O42.5的普通硅酸盐水泥作对比,研究了向单位生料掺入污泥量(质量分数)为0%、0.50%、1.00%、1.50%、2.00%和2.50%时生产出水泥样品的性能.对水泥熟料XRD、显微结构、生料和熟料的粒度分析、物质变化以及水泥的凝结时间、比表面积、胶砂强度和浸出毒性试验的研究结果表明,制备的水泥样品强度与P.O42.5水泥标样基本一致,且随着污泥掺入量的增加,生料和熟料中的Al、Fe、Ba、Mn和Ti元素的含量呈减少趋势,水泥的凝结时间增长,3 d强度受到影响并降低,但在7 d后基本恢复,而且强度较高.The aim of this paper was to study the effect on cement property by using of municipal sewage as additive in the process of clinker burning.Based on the standard sample P.O42.5 from cement plant,the properties of eco-cement samples adding municipal sewage to unit raw material by 0%,0.50%,1.00%,1.50%,2.00%,2.50% respectively and the standard sample from the cement plant were compared.According to the analysis of X-ray diffraction,microstructure,the particles size determination material change,the setting time,specific surface area,leaching toxicity and strength of cement mortar of the cement,respectively,it showed that the strength of the productions were similar to the P.O42.5 standard sample.The metal ion concentrations of Al,Fe,Ba,Mn and Ti in clinkers and raw material decreased,the initial and setting time increased,as well as the strength of the paste within the curing time of 3 days decreased with the increase of municipal sewage ratio.However,after the curing of 7 days,the strength was similar to non-sludge-mortar or even higher.

关 键 词：城市污泥 生态水泥 熟料 强度 粒度 重金属 

分 类 号：X705[环境科学与工程—环境工程]