For the cement-clay slurry commonly used in dynamic water grouting, consider adding coal ash to optimize the performance of cement-clay slag composite slurry and discuss the reaction mechanism of the slurry through microchemical element analysis; the orthogonal test was used to study the influence of various factors on material setting time, solidification ratio, water segregation rate, and the optimized ratio of the slurry that was obtained by integrating the unconfined compressive strength of grouting concretion body and slurry configuration cost. The results showed that the water-solid ratio had the greatest influence on the comprehensive performance, followed by the amount of coal ash admixture. The best performance of the composite slurry was obtained with a water-solid ratio of 0.8:1 and a cement:coal ash:clay:quicklime:sodium sulfate:water mass ratio of 1:0.45:0.20:0.05:0.07:1.32. Finally, by comparing the mechanical properties of the optimized slurry and the grouting concretion body, it is proved that the optimized slurry has superior performance to meet the general grouting project requirement.

中文翻译：

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水泥-粘土浆优化配比及性能研究

针对动态注浆常用的水泥-粘土浆，考虑加入粉煤灰优化水泥-粘土渣复合浆的性能，并通过微量化学元素分析探讨该浆的反应机理；采用正交试验研究了各种因素对材料凝结时间、凝固率、水偏析率的影响，并综合考虑了注浆混凝土体无侧限抗压强度和浆体配置成本得到的浆体优化配比。结果表明，水固比对综合性能的影响最大，其次是煤灰掺量。当水固比为0.8:1，水泥:煤灰:粘土:生石灰:硫酸钠: 水的质量比为 1:0.45:0.20:0.05:0.07:1.32。最后，通过比较优化后的浆体与注浆混凝土体的力学性能，证明优化后的浆体具有优越的性能，可以满足一般的注浆工程要求。