碳化养护对冶金渣-熟石灰砂浆性质的影响  

Effect of the Carbonation on the Steelmaking Slag-Slaked Lime Mortar

作　　者：曹伟达[1,2] 杨全兵[1,2] 

机构地区：[1]同济大学材料科学与工程学院 [2]先进土木工程材料教育部重点实验室,上海200092

出　　处：《土木建筑与环境工程》2014年第4期92-97,共6页Journal of Civil,Architectural & Environment Engineering

基　　金："十一五"国家科技支撑计划(2006BAF02A24)

摘　　要：主要研究了碳化养护对冶金渣熟石灰(SmS-SL)砂浆性质的影响,并通过XRD、真孔隙率和DTA/TG研究了影响机理和SmS-SL砂浆的环保效果。实验结果表明:碳化养护可提升SmSSL砂浆的强度,改善它的体积稳定性和安定性。随着复合微粉中钢渣比例的提升,碳化养护对SmS-SL砂浆的增强效果逐渐提升,而对体积稳定性的改善效果却逐渐减弱。以钢渣为原料的SmS-SL砂浆的环保效果较为显著,其钢渣利用率达到27.8%,固碳率达到6.4%。The effect of the carbonation on the properties of the steelmaking slag-slaked lime （SmS-SL） mortar and its mechanism were mainly investigated. Furthermore, the environmental benefits of the SmS-SL mortar were discussed as well. Results indicated that carbonation could strengthen the SmS-SL mortar, reduce its drying shrinkage and improve its soundness. With the increase in the steel slag content, the strengthening effect of carbonation on the SmS-SL mortar is enhanced, but its dry shrinkage reduction effect is weakened. The SmS-SL mortar using steel slag exhibits significant environmental benefits. Its COz sequestration-efficiency and steel slag-recycle efficiency respectively reaches 6.4% and 27.8%.

关 键 词：砂浆 冶金渣 碳化养护 环保效果 

分 类 号：X757[环境科学与工程—环境工程]