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首页> 外文期刊>Bulletin of engineering geology and the environment >The effect of soil mineralogy and pore fluid chemistry on the suction and swelling behavior of soils
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The effect of soil mineralogy and pore fluid chemistry on the suction and swelling behavior of soils

机译：土壤矿物学和孔隙流体化学对土壤吸胀特性的影响

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摘要

Soil suction is one of the most important parameters for describing the moisture condition and engineering behavior of unsaturated soils. Therefore, changes in suction behavior of soils in the presence of saline waters are important for engineered barriers. The aim of this study was to determine the change in suction and swelling behavior of soils, which were exposed to salt solutions (NaCl, CaCl_2, natural seawater) with respect to distilled water. The three soil samples were gathered with different mineralogy and plasticity characteristics and tested for determining matric and total suction values and for obtaining free swelling characteristics in the presence of salt solutions. The bentonitic soil sample had the highest total suction value in the presence of seawater. Kaolinitic and zeolitic soil samples had the highest total suction values in the presence of NaCl solution. The highest modified free swell index value of the samples was obtained in the presence of NaCl solution for all the soil samples. No relationship was found between the total suction, matric suction and the modified free swell index value of the tested soils.
机译：吸力是描述非饱和土壤水分状况和工程特性的最重要参数之一。因此，对于盐水而言，改变盐水在土壤中的吸力行为是很重要的。这项研究的目的是确定相对于蒸馏水而言，暴露于盐溶液（NaCl，CaCl_2，天然海水）的土壤的吸力和膨胀行为的变化。收集了三种具有不同矿物学和可塑性特征的土壤样品，并进行了测试，以测定基质和总吸力值，并在盐溶液存在下获得自由溶胀特性。在海水存在下，膨润土样品的总吸力值最高。在NaCl溶液存在下，高岭土和沸石土壤样品的总吸力值最高。在所有土壤样品中，在NaCl溶液存在下，样品的最高改性自由溶胀指数值最高。在总吸力，基质吸力和测试土壤的改良自由膨胀指数值之间未发现任何关系。

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