水泥-膨润土浆液配比及适用性研究
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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.
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.
引文
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[7] 丁国庆,蒋林华,张继尹.膨润土对硅酸盐水泥水化硬化的影响[J].武汉理工大学学报,2012,34(4):20-23.
[8] 杨仁树,薛华俊,李涛涛,等.九龙煤矿深部岩体注浆浆液配比优化研究[J].煤炭工程,2015,47(2):1-4.
[9] 单仁亮,杨昊,张雷,等.水泥稳定浆液配比及适用条件研究[J].煤炭工程,2014,46(12):97-100.
[10] 赵莽,严绍军,何凯,等.龙门石窟裂隙防渗灌浆新材料试验研究[J].长江科学院院报,2016,33(6):115-123.
[2] 王静.水泥膨润土混合浆液在铅厂电站坝基帷幕灌浆中的应用[J].中国农村水利水电,2011(8):143-145.
[3] 陈华俊.浅谈膨润土水泥浆在微细裂隙地层帷幕灌浆工程中的应用[J].水利建设与管理,2011,31(2):17-20.
[4] 朱艳,陈匀序.膨润土对水泥浆溶液的影响[J].华东公路,2007(1):67-70.
[5] 徐超,黄亮,邢皓枫.水泥-膨润土泥浆配比对防渗墙渗透性能的影响[J].岩土力学,2010,31(2):422-426.
[6] 周麟,毛文,施墨华.盾构隧道同步注浆浆液配合比优化设计[J].武汉工程大学学报,2013,35(9):29-33.
[7] 丁国庆,蒋林华,张继尹.膨润土对硅酸盐水泥水化硬化的影响[J].武汉理工大学学报,2012,34(4):20-23.
[8] 杨仁树,薛华俊,李涛涛,等.九龙煤矿深部岩体注浆浆液配比优化研究[J].煤炭工程,2015,47(2):1-4.
[9] 单仁亮,杨昊,张雷,等.水泥稳定浆液配比及适用条件研究[J].煤炭工程,2014,46(12):97-100.
[10] 赵莽,严绍军,何凯,等.龙门石窟裂隙防渗灌浆新材料试验研究[J].长江科学院院报,2016,33(6):115-123.