外加剂对低温水泥浆性能的影响试验研究  

Study on effect of additives on cement slurry at low temperature

作　　者：向浩天 蒋炳 李之军[1,2] 陈礼仪[1,2] XIANG Haotian;JIANG Bing;LI Zhijun;CHENG Liyi(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu Sichuan 610059,China;College of Environmental and Civil Engineering,Chengdu University of Technology,State Key Laboratoryof Geological Hazards and Prevention and Control,Chengdu Sichuan 610059,China)

机构地区：[1]成都理工大学环境与土木工程学院,四川成都610059 [2]成都理工大学环境与土木工程学院地质灾害及防治国家重点实验室,四川成都610059

出　　处：《探矿工程（岩土钻掘工程）》2020年第1期36-42,共7页Exploration Engineering:Rock & Soil Drilling and Tunneling

摘　　要：为解决在普通硅酸盐水泥(P.O42.5)或混凝土施工中遭遇低温环境而不能顺利凝固的问题。对普遍使用的硅酸盐水泥进行了基础性能测试试验,使用早强剂与高效减水剂对水泥进行调整性能,寻找出最佳的调整方案,对比调整前后水泥浆及水泥石强度等各项数据。结果表明10%早强剂、2‰JSS高效减水剂的调整方案较好地改善了水泥浆的流动性、凝结时间、水化热放热速率、结石率及水泥石的早期强度等问题。研究成果对低温条件下的混凝土施工有一定的参考价值。In order to solve the problem that common Portland cement(P. O42.5) or concrete can not cure smoothly in low temperature environment, the basic performance test of Portland cement is carried out, and the curing accelerator and the superplasticizer are used to adjust the performance of cement to find out the proper adjustment plan. The strength data of cement slurry and cement paste before and after adjustment are compared, and the results show that the adjustment make-up of 10% LC curing accelerator and 2‰ JSS super plasticizer can improve the fluidity, setting time, release rate of hydration heat, calculus rate and early strength of cement paste. The research results can provide some reference for concrete construction under low temperature conditions.

关 键 词：低温 水泥浆 水泥浆流动性 凝结时间 水泥强度 水化热 

分 类 号：TU528[建筑科学—建筑技术科学]