垃圾焚烧炉渣活性激发及对水泥性能的影响  

Stimulation of MSWI Bottom Ash Activity and Effects on Cement Performance

作　　者：李相国[1] 宋留庆[1] 马保国[1] 方晨炜[1] 汪杰[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2012年第6期1-5,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50823511)

摘　　要：通过外掺法研究了城市生活垃圾焚烧炉渣用作水泥混合材对水泥性能的影响,同时考察了炉渣活性激发和炉渣水泥的环境安全性。实验结果表明:炉渣具有较弱的火山灰活性,随着其掺入量的增加,水泥标准稠度用水量增加,凝结时间延长,水泥强度下降,当PO 42.5水泥中炉渣掺量达到25%时仍能达到PO 32.5水泥生产要求。在炉渣活性激发方面,钙系列激发剂能够提高炉渣水泥的早期和后期强度(CaCl2会使后期强度倒缩),钠系列激发剂均会降低其强度。炉渣的掺入能够降低水泥净浆化学收缩率。在炉渣掺量35%时,砂浆试块的重金属极限溶出含量远低于国家标准最高允许浓度,不会对环境带来二次污染。The author studied properties of cement that partially replaced by MWIS bottom ash as a cement admixture, and investigated slag cement＇s activity of stimulating and environmental safety. The results show that： MWIS bottom ash is of weak activity, with bottom ash replaces cement increases, water for cement standard consistency slowly increased, setting time slightly extended, but has little effect on cement strength reduced. The dosage of MWIS bottom ash in PO 42.5 cement even reached 25%, PO 32. 5 cement production requirements can be satisfied. In the aspects of stimulating the activity, the added of Ca-based activators into cement can improve the early and late strength （CaCl2 will result in late strength＇s retraction）, Conversely, Na-based activators will reduce the intensity. MWIS bottom ash as cement admixture reduces the shrinkage of cement paste. MWlS bottom ash dosage of 35%, the mortar test block dissolution of heavy metal content is much lower than the limit of maximum allowable concentration of national standard and will not bring secondary pollution to the environment.

关 键 词：垃圾焚烧炉渣 混合材 激发剂 化学收缩 环境安全性 

分 类 号：TU528[建筑科学—建筑技术科学] TQ172[化学工程—水泥工业]