NaCl溶液对宁明膨胀土强度指标的影响

Soil Engineering and Foundation(2017)

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Abstract
通过宁明膨胀土的液塑限试验以及采用泥浆制样法的固结慢剪试验,分析了不同浓度的NaCl溶液对宁明膨胀土强度指标的影响.结果表明:随着NaCl溶液浓度的增加,粘聚力与内摩擦角均呈现下降的趋势;液限与塑性指数也随着NaCl溶液浓度的增加而降低.说明NaCl溶液浓度对宁明膨胀土的强度指标均有不同程度的影响,不同浓度的NaCl溶液导致了粘土颗粒间的相互作用力和双电层的变化,从而影响着其强度指标.
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