利用城市污水处理厂污泥生产生态水泥

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...

Utilizing the Wastewater Treatment Plant Sludge for the Production of Eco-cement

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.