摘要
水泥浆液中掺加膨润土,有利于改善注浆时出现浆液回浓快、吃水不吃浆等问题.其性能的改善受控于膨润土掺量和水固比,而析水率、流动度、终凝时间是评价浆液注浆性能优劣的主要指标点.因此,进行了膨润土掺量和水固比对水泥-膨润土浆液析水率、流动度、终凝时间的影响性分析.得到如下结论:不同膨润土掺量的浆液流动度均随水固比增加而增加,相同水固比对应浆液流动度随膨润土掺量增加而降低;膨润土抑制水析出的效果,在水固比达到一定值后开始下降;不同水固比下的终凝时间,随着膨润土掺量的增加,其终凝时间是先增加后下降的.
Adding bentonite to cement slurry helps improve the fluidity and stability of cement slurry.Its performance improvement is determined by bentonite content and water-solid ratio.While bleeding rate,fluidity and final setting time are the key indicators in performance evaluating.This paper mainly studies the impact of bentonite content and water-solid ratio on the bleeding rate,fluidity and final setting time of cement-bentonite slurry.The study results show the increase of water-solid ratio,the fluidity of samples increased monotonically with the same bentonite content;but the fluidity of samples decreased monotonically with the increase of bentonite content.And the effect of bentonite content against slurry water rate increased with the increase of water-solid ratio firstly then decreased gradually.Under different water cement ratios,final setting time with the increase of dosage of bentonite,its final setting time increases first and then decreases.
作者
费子豪
吴进高
明华军
柯睿
史存鹏
Fei Zihao;Wu Jingao;Ming Huajun;Ke Rui;Shi Cunpeng(Hubei Key Laboratory of Construction & Management in Hydropower Engineering,China Three Gorges Univ.,Yichang 443002,China;College of Hydraulic & Environmental Engineering,China Three Gorges Univ.,Yichang 443002,China;Institute of Problematic Soil Mechanics,China Three Gorges Univ.,Yichang 443002,China;Three Gorges Geotechnical Consultants Co.,Ltd.,Wuhan 430074,China)
出处
《三峡大学学报（自然科学版）》
CAS
北大核心
2019年第4期51-54,共4页
Journal of China Three Gorges University：Natural Sciences
基金
水电工程施工与管理湖北省重点实验室(三峡大学)开放基金项目(2016KSD18)
国家自然科学基金青年科学基金项目(51609126,51709154)
湖北省自然科学基金项目(2016CFB237)
关键词
水泥-膨润土浆液
膨润土掺量
水固比
流动度
析水率
终凝时间
cement-bentonite slurry
bentonite content
water-solid ratio
fluidity
bleeding rate
final setting time
