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基于黄河中游地区黄土自西北向东南分布变化的规律,研究黄土的物理化学性质和矿物成分对水泥基土壤固化剂固化土无侧限抗压强度的影响。试验结果表明:随着黏粒含量的增加,固化土的强度先降低后增加,其中黏粒含量17.0%是分界点;随着碱度的增加,固化土的强度增加;蒙脱石的加固效果好于伊利石,在以伊利石为主的土中,随着伊利石含量的增加,固化土的强度升高;随着阳离子交换总量的增加和交换性钠离子百分比的降低,固化土的强度增加。研究表明,黄土的物理化学性质不同是水泥基土壤固化剂土质适宜性产生的主要原因;黄河中游地区自西北向东南加固土的强度具有增大的规律性。
Based on the distribution of loess from northwest to southeast in the middle reaches of the Yellow River, the effects of the physicochemical properties of loess and unconfined mineral composition on the unconfined compressive strength of soil are studied. The results show that with the increase of the clay content, the strength of the hardened soil first decreases and then increases, in which the clay content of 17.0% is the demarcation point; the strength of the hardened soil increases with the increase of the alkalinity; the reinforcing effect of the montmorillonite Is better than the illite, in the illite-dominated soil, with the increase of the illite content, the strength of the solidified soil increases; with the increase of the total amount of cation exchange and the decrease of the exchangeable sodium ion percentage, Increased strength. The results show that the different physico-chemical properties of loess are the main reasons for soil suitability of cement-based soil curing agent. The strength of soil reinforcement from northwest to southeast of the middle reaches of the Yellow River has an increasing regularity.