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为了揭示污水对水泥土的影响规律,并尝试采用电阻率法作为描述强度和污染特征的手段,把粉质黏土和两种水泥(普通硅酸盐水泥、矿渣硅酸盐水泥)制作的水泥土试块分别浸泡在3种液体(自来水、生活污水、造纸厂污水)中模拟环境侵蚀。首先对比分析了污水对土体液塑限的影响,其次研究了龄期、水泥类型、污水类型等对水泥土抗压强度和电阻率的影响,考察了电阻率和抗压强度的关系。结果表明:污染后土样的液限、塑限均增大,塑性指数减小;水泥土抗压强度和电阻率均随龄期增加而增长;污水均降低了水泥土的抗压强度和电阻率,但是矿渣硅酸盐水泥土的抗压强度和电阻率均高于普通硅酸盐水泥土,说明在污水环境中,矿渣水泥对水泥土有一定的抗劣化能力;在不同的龄期、水泥类型、污水类型下,水泥土电阻率均与抗压强度呈现出一致的变化规律,二者线性相关。
In order to reveal the law of influence of sewage on cement and soil, and try to use the resistivity method as a means to describe the strength and pollution characteristics, the cement and soil made of silty clay and two types of cement (ordinary Portland cement, slag Portland cement) Test blocks were immersed in three kinds of liquids (tap water, domestic sewage, paper mill wastewater) simulated environmental erosion. Firstly, the influence of sewage on liquid-plastic limit of soil was analyzed. Secondly, the effect of age, cement type and sewage type on compressive strength and resistivity of cement-soil was investigated. The relationship between resistivity and compressive strength was investigated. The results show that the liquid limit and the plastic limit of soil samples increase and the plasticity index decreases after soil pollution. The compressive strength and resistivity of cement soil increase with the increase of age. Both the compressive strength and electrical resistance of cement soil decrease Rate, but the compressive strength and resistivity of slag Portland cement soil are higher than ordinary Portland cement soil, indicating that in the sewage environment, slag cement on cement soil have some anti-deterioration ability; at different ages, Under the types of cement and sewage, the resistivity of cement-soil shows a consistent change with the compressive strength, and the two are linearly related.