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通过室内模拟试验,对浸泡于不同类型、浓度的碱(NaOH和NH3·H2O)溶液和盐(NaCl和Na2SO4)溶液中的粉土试样进行了物理力学指标的测定,总结了其与介质的类型、浓度之间的变化规律:碱溶液中的土样,随着溶液浓度的提高,土样的密度、液限、塑限、塑性指数、压缩系数a1-2均有所增加,孔隙比有所降低,横向比较NaOH溶液和NH3·H2O溶液中土样的各项指标发现,NaOH对于土样的影响要强于NH3.H2O;盐溶液中的土样,随着溶液浓度的增加,土样的密度、比重随之增加,孔隙比、液限、塑限、塑性指数和压缩系数均随之降低,横向比较NaCl溶液和Na2SO4溶液腐蚀后土样的各项指标发现,Na2SO4对于土样的影响要强于NaCl,说明SO24-比Cl-对土样的影响大;并且得到了各种溶液下液限与塑性指数的线性关系,建立了土样的压缩系数与溶液浓度的指数分布数学关系,在实际工程中可供参考。
Through indoor simulation tests, the physical and mechanical indexes of silt samples immersed in different types and concentrations of alkali (NaOH and NH3 · H2O) solutions and salt (NaCl and Na2SO4) solutions were determined. Type and concentration of soil samples: soil samples in alkaline solution, with the increase of solution concentration, soil density, liquid limit, plastic limit, plastic index, the compression coefficient a1-2 have increased, the porosity ratio of Compared with the soil samples in NaOH solution and NH3 · H2O solution, the influence of NaOH on soil samples was stronger than that of NH3.H2O in saline solution. With the increase of solution concentration, The density, the specific gravity increased, and the void ratio, liquid limit, plastic limit, plasticity index and compressibility decreased. After transverse comparison between NaCl solution and Na2SO4 solution, the soil samples showed that Na2SO4 had stronger influence on soil samples In NaCl, the effect of SO24- on soil samples was larger than that of Cl-, and the linear relationship between liquid limit and plasticity index was obtained. The exponential distribution of compressibility and solution concentration of soil samples was established. Project for reference.