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Impact of cyclic wetting-drying on swelling behavior of lime-stabilized soil

机译：循环干湿对石灰稳定土膨胀特性的影响

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In this study, the impact of cyclic wetting and drying on swelling behavior of lime-stabilized clayey soils has been investigated. Swelling potential and swelling pressure tests have been carried out on soil mixtures with various amounts of kaolinite-bentonite clays, and on a high plasticity clayey soil sample. The tests have been repeated after the addition of lime to the lime-treated samples in different preparation. In each cycle the tested samples were allowed air dry to their initial water content thus shrinking to their initial height, which is called 'partial shrinkage' method. The results showed that the initial beneficiary effect of lime stabilization was lost after the first cycle and the swelling potential increased at the subsequent cycles. On the other hand, the swelling potential and the swelling pressure of the untreated soil samples started decreasing after the first cycle and they reached equilibrium after the fourth cycle.
机译：在这项研究中，已经研究了循环润湿和干燥对石灰稳定的黏土的溶胀行为的影响。已经在具有各种高岭土-膨润土粘土的土壤混合物和高塑性粘土质土壤样品上进行了膨胀势和溶胀压力测试。在将石灰添加到不同制备方法的石灰处理样品中后，已经重复了测试。在每个循环中，让被测样品空气干燥至其初始含水量，从而收缩至其初始高度，这称为“部分收缩”法。结果表明，在第一个循环后失去了石灰稳定作用的最初受益，而在随后的循环中溶胀潜力增加了。另一方面，未经处理的土壤样品的溶胀潜力和溶胀压力在第一个循环后开始下降，在第四个循环后达到平衡。

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