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首页> 外文期刊>Journal of materials in civil engineering >Amelioration of Expansive Clay Slopes Using Calcium Chloride
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Amelioration of Expansive Clay Slopes Using Calcium Chloride

机译：用氯化钙改善膨胀土的边坡

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摘要

Lime continues to be one of the most popular chemical admixtures used to modify expansive clays despite the associated mixing and pulverization problems. In the present investigation, the efficacy of CaCl_2 in place of conventionally used lime is studied by conducting laboratory and field tests. These investigations were carried out on the slopes of a trapezoidal trench made in expansive clay bed. Heave measurements were taken on the lime and CaCl_2 treated slopes and also on untreated slopes for four consecutive cycles of wetting and drying. The field cyclic seasonal movements and the subsequent laboratory tests on undisturbed and disturbed soil samples revealed that the CaCl_2 could be a promising chemical modifier instead of conventionally used lime, not only due to its multifold influence on heave control, plasticity reduction, and swell properties but also its easy application in the form of solution without any need for pulverization and mixing. Though an apparent reduction in unconfmed compressive strength of treated samples is observed, the drained triaxial tests on treated and untreated samples revealed that there is an increase in the angle of internal friction of treated samples.
机译：尽管存在相关的混合和粉碎问题，石灰仍然是用于改性膨胀粘土的最受欢迎的化学掺合剂之一。在本研究中，通过进行实验室和现场测试研究了CaCl_2代替传统石灰的功效。这些研究是在膨胀黏土床中梯形沟槽的斜坡上进行的。在四个连续的润湿和干燥循环中，对石灰和CaCl_2处理的斜坡以及未经处理的斜坡进行升沉测量。野外周期性季节运动和随后对未扰动和扰动土壤样品的实验室测试表明，CaCl_2可能是一种有前途的化学改性剂，而不是常规使用的石灰，这不仅是因为CaCl_2对升沉控制，塑性降低和膨胀特性有多重影响，而且它也很容易以溶液形式应用，无需粉碎和混合。尽管观察到处理后样品的无限制抗压强度明显降低，但对处理后和未处理样品进行的排水三轴试验表明，处理后样品的内摩擦角有所增加。

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