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Influence of Pore Fluid Composition on Volume Change Behaviour of Clays Exposed to the Same Fluid as the Pore Fluid

机译:孔隙流体组合物对暴露于与孔流体相同流体的粘土体积变化行为的影响

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This paper reports experimental results relative to the influence of pore fluid composition on volume change behaviour of four different clayey soils: the Ponza ben-tonite, a commercial kaolin, the Bisaccia and the Marino clays. Oedometer tests were carried out on dry materials and on the materials reconstituted with distilled water, concentrated NaCl solutions and a non polar fluid (cyclohexane). The influence of ethanol was analysed only in the case of the Bisaccia clay. All the tests were earned out by exposing the soils to the same fluid as the pore fluid. The results show that the materials prepared with cyclohexane behave similarly to the dry ones and they both are less compressible than the materials prepared with aqueous solutions. The coefficient of consolidation increases dramatically and swelling is negligible in the whole considered stress range. Volume change parameters strongly depend on the dielectric constant of the pore fluid.
机译:本文报告了实验结果相对于孔隙流体组成对四种不同粘土土壤体积变化行为的影响:Ponza Ben-Tonite,商业Kaolin,Bisaccia和Marino粘土。在干燥材料上和用蒸馏水,浓NaCl溶液和非极性流体(环己烷)重构的材料上进行了数量的测试试验。仅在Bisaccia粘土的情况下分析乙醇的影响。通过将土壤暴露于与孔隙流体相同的流体将土壤暴露于与孔隙相同的流体来获得所有测试。结果表明,用环己烷制备的材料与干燥的材料类似于干燥的材料,并且它们均不受用水溶液制备的材料可压缩。整个综合的固结系数急剧增加,整个考虑的压力范围都可以忽略不计。体积变化参数强烈取决于孔隙流体的介电常数。

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