Cyclic Behavior of Fine-Grained Soils at Different pH Values
Cyclic Behavior of Fine-Grained Soils at Different pH Values
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DOI：
10.1061/(asce)1090-0241(2009)135:2(271
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发表时间：
2009-02
影响因子：
3.9
通讯作者：
I. Gratchev;K. Sassa
中科院分区：
文献类型：
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作者：
I. Gratchev;K. Sassa
通过不排水环剪试验，对不同pH条件下的人工混合土和天然土进行了不排水环剪试验，研究了pH对细粒土液化敏感性的影响。用稀释的硫酸（H2 S O4）和溶解的氢氧化钠（NaOH）溶液分别制造酸性和碱性环境，以蒸馏水作为对照液。选择低塑性高岭土和伊利石-砂混合料以及中等塑性膨润土-砂混合料，研究了塑性和粘土矿物对土壤ph依赖循环加载响应的影响。结果表明：pH值对中等塑性混合料的影响更为明显，且与粘土组分的矿物学关系密切；例如，在酸性介质中，高岭土-砂混合物变得更耐液化，而伊利石-砂混合物变得更容易液化。观察到膨润土-砂混合料具有良好的抗氧化性能。
The effects of pH on the liquefaction susceptibility of fine-grained soils were examined by performing undrained cyclic ring-shear tests on artificial mixtures and a natural soil under different pH conditions. Solutions of diluted sulphuric acid ( H2 S O4 ) and dissolved sodium hydroxide (NaOH) were used to create acidic and alkaline environments, respectively, while distilled water was used as a reference liquid. Low plasticity kaolin and illite-sand mixtures and a medium plasticity bentonite-sand mixture were selected to investigate the influence of plasticity and clay mineralogy on the pH-dependent response of soil to cyclic loading. The results showed that the effects of pH were more pronounced for the medium plasticity mixture, and depended greatly on the mineralogy of clay fraction. For example, in an acidic medium, the kaolin-sand mixture became slightly more resistant to liquefaction while the illite-sand mixture became more susceptible to liquefaction. The bentonite-sand mixture was observed to b...