黏土水泥系列浆材黏度时变特性研究
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摘要
为系统研究黏土水泥系列浆材的黏度时变特性,利用Brookfield+R/S流变仪对浆材进行了黏度试验,并选取典型试验结果深入研究黏度时变特性,得到拟合系数较高的黏度时变数学模型。结果表明:普通黏土水泥浆材黏度随水固比的升高而降低,但随黏土掺量的增加而增大,黏度随时间变化可划分为下降期、上升期和固化期3个阶段;黏土水泥膏浆或砂膏浆的黏度值均随固化剂掺量增大而增大,但水泥膏浆的黏度变化分为低黏期、上升期和稳定期3个阶段,而水泥砂膏浆的黏度变化只有下降期和稳定期两个阶段。
In order to systematically study the viscosity time-varying characteristics of clay cement series slurry used in loose and soft ground,a Brookfield + R/S rheometer was used to test the viscosity of slurry. The typical experimental results were analyzed deeply,and the time-varying mathematical model of viscosity with higher fitting coefficient was obtained. The results showed that the viscosity of ordinary clay cement slurry decreased with the increase of water-solid ratio,but increased with the clay content. The sequential change of viscosity can be divided into three stages: decreasing period,rising period and curing period. The viscosity of clay cement pasty slurry or clay cement sand pasty slurry both increase with the content of curing agent.The viscosity of clay cement pasty slurry can be divided into three stages: low viscosity period,rising period and stable period.However,the viscosity of clay cement sand pasty slurry can only be divided into two stages: decreasing stage and stable stage.
In order to systematically study the viscosity time-varying characteristics of clay cement series slurry used in loose and soft ground,a Brookfield + R/S rheometer was used to test the viscosity of slurry. The typical experimental results were analyzed deeply,and the time-varying mathematical model of viscosity with higher fitting coefficient was obtained. The results showed that the viscosity of ordinary clay cement slurry decreased with the increase of water-solid ratio,but increased with the clay content. The sequential change of viscosity can be divided into three stages: decreasing period,rising period and curing period. The viscosity of clay cement pasty slurry or clay cement sand pasty slurry both increase with the content of curing agent.The viscosity of clay cement pasty slurry can be divided into three stages: low viscosity period,rising period and stable period.However,the viscosity of clay cement sand pasty slurry can only be divided into two stages: decreasing stage and stable stage.
引文
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[16]李术才,韩伟伟,张庆松,等.地下工程动水灌浆速凝浆液黏度时变特性研究[J].岩石力学与工程学报,2013,32(1):1-7.
[17]GB175-2007 Common Portland cement[S].
[18]Zhang Guijin,Liu Jie,Li Yi,et al.A Pasty Clay-cement Grouting Material for Soft and Loose Ground under Groundwater Conditions[J].Advances in Cement Research,2017,29(2):54-62.
[2]张贵金,曾柳絮,陈安重,等.松软地层高压灌浆封孔浆体研制及应用论证[J].岩土工程学报,2012,34(6):1109-1116.
[3]张文举,卢文波,陈明,等.基于灌浆前、后波速变化的岩体固结灌浆效果分析[J].岩石力学与工程学报,2012(3):469-478.
[4]罗长军.帷幕灌浆技术在既有土坝可溶岩坝基中的应用[J].岩石力学与工程学报,2004,23(22):3910-3916.
[5]孙钊.大坝基岩灌浆[M].北京:中国水利水电出版社,2004.
[6]Heidarzadeh M,Mirghasemi A A,Hosseini M M,et al.Trial Chemical Grouting in Filter Materials at the Karkheh Dam Site,Iran[J].Journal of Structural Engineering and Geo-Techniques,2014,4(1):29-33.
[7]Karol R H.Chemical Grouting and Soil Stabilization,Revised and Expanded[M].Raton:CRC Press,2003.
[8]陈金祥,陈明祥.高压下水泥灌浆材料的性能研究[J].武汉理工大学学报,2004,26(6):11-14.
[9]余其俊,赵三银,黄家琪,等.碱激发碳酸盐矿-矿渣胶凝-灌浆材料缓凝与流动性能的改善[J].硅酸盐学报,2005,33(7):871-875.
[10]Nguyen V H,Remond S,Gallias J L.Influence of Cement Grouts Composition on the Rheological Behaviour[J].Cement&Concrete Research,2011,41(3):292-300.
[11]Rahman M,Wiklund J,KotzéR,et al.Yield Stress of Cement Grouts[J].Tunnelling&Underground Space Technology,2017(61):50-60.
[12]刘泉声,卢超波,刘滨,等.考虑温度及水化时间效应的水泥浆液流变特性研究[J].岩石力学与工程学报,2014,33(S2):3730-3740.
[13]刘健,张载松,韩烨,等.考虑黏度时变性的水泥浆液盾构壁后注浆扩散规律及管片压力模型的试验研究[J].岩土力学,2015,36(2):361-368.
[14]杨志全,侯克鹏,郭婷婷,等.黏度时变性宾汉体浆液的柱-半球形渗透灌浆机制研究[J].岩土力学,2011,32(9):2697-2703.
[15]Zhang J,Pei X,Wang W,et al.Hydration Process and Rheological Properties of Cementitious Grouting Material[J].Construction&Building Materials,2017(139):221-231.
[16]李术才,韩伟伟,张庆松,等.地下工程动水灌浆速凝浆液黏度时变特性研究[J].岩石力学与工程学报,2013,32(1):1-7.
[17]GB175-2007 Common Portland cement[S].
[18]Zhang Guijin,Liu Jie,Li Yi,et al.A Pasty Clay-cement Grouting Material for Soft and Loose Ground under Groundwater Conditions[J].Advances in Cement Research,2017,29(2):54-62.