超高水材料单浆流变特性研究

摘要

Rheological properties of the single superhigh-water material slurry are measured under the different conditions of time,water volume fraction and temperature.The effects of time,water volume fraction and temperature on the rheological parameters of single slurry are analyzed.The results show that:①Single slurry A and slurry B are both the power-law fluids having time-variant parameters,and the shear thinning characteristics are showed;②in the range of experimental conditions,time,water volume fraction and temperature can affect the level of rheological parameters but could not change the rheological model of single slurry;③the relationship of consistency coefficient and single factor,and the relationship of rheological index and single factor can both be fitted by cubic polynomials.Based on the above analysis results,a rheological parameters model under the time,water volume fraction and temperature is established,by this model,the consistency coefficient and rheological index of slurry in any state can be calculated.The study results in this paper can provide theoretical support and guidance for the pipeline design and grouting construction.%对不同时间、水体积分数及温度条件下的超高水材料单浆的流变特性进行了测定,分析了时间、水体积分数和温度3种因素对浆液流变参数的影响.结果表明:超高水材料A、B单浆均属于参数时变性幂律流体,表现出剪切稀化特性;在实验涉及条件区间内,时间、水体积分数及温度会对材料单浆流变参数大小产生影响,但不会导致浆液流变模型的根本改变;浆液稠度系数和流变指数随单一因素变化关系可用3次多项式拟合.在此基础上,建立了流变参数在时间、水体积分数和温度3个因素综合影响下的变化关系式,可计算得到条件范围内任意状态浆液的稠度系数和流变指数.研究结果可以为管路设计、注浆施工等工作提供理论支持和指导.