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Evaluation of Using Different Nanomaterials to Stabilize the Collapsible Loessial Soil
International Journal of Civil Engineering ( IF 1.7 ) Pub Date : 2020-11-23 , DOI: 10.1007/s40999-020-00583-8
S. Mohsen Haeri , Arsalan Valishzadeh

Construction over problematic soils is a common problem in many parts of the world, and one of the effective procedures to tackle this problem is soil stabilization. Accordingly, the current study provides the finding of a laboratory investigation into the effect of three kinds of nanomaterials, including nano-silica (NS), nano-clay (NC) and nano-calcium carbonate (NCC) on the properties of a loessial collapsible soil. To accomplish this issue, reconstituted samples of the stabilized loessial soil were prepared for unconfined compression and consolidation tests. The results illustrated that an insignificant amount of nanomaterials (less than 1% of the total dry weight of the soil when is used in as a liquid prepared solution) could considerably improve the mechanical behavior of the soil. The values of additives which gave the maximum unconfined compressive strength (UCS) were determined to be 0.1, 0.2, and 0.4% of the total dry weight of the soil, respectively, for NS, NCC, and NC. The most efficient improvement was the stabilized sample with 0.2% NCC which resulted in the highest UCS after 28 days of curing. In addition, the results of consolidation tests showed that the degree of collapse potential (CP) of the tested stabilized loess improved from moderately severe for unstabilized soil to moderate for all of the stabilized soils with different stabilizing agents. Hence, stabilization using these nanomaterials could partially improve the collapse potential of the tested loessial soil.

中文翻译:

使用不同纳米材料稳定湿陷性黄土的评价

在有问题的土壤上施工是世界许多地方的普遍问题,解决这一问题的有效程序之一是土壤稳定。因此,目前的研究提供了实验室调查的结果,包括纳米二氧化硅 (NS)、纳米粘土 (NC) 和纳米碳酸钙 (NCC) 三种纳米材料对黄土可折叠材料性能的影响。土壤。为了解决这个问题,为无侧限压缩和固结试验准备了稳定黄土的重建样品。结果表明,微量的纳米材料(当用作液体制备溶液时,少于土壤总干重的 1%)可以显着改善土壤的机械性能。对于 NS、NCC 和 NC,赋予最大无侧限抗压强度 (UCS) 的添加剂的值分别为土壤总干重的 0.1、0.2 和 0.4%。最有效的改进是含有 0.2% NCC 的稳定样品,它在固化 28 天后产生最高的 UCS。此外,固结试验结果表明,所测试的稳定黄土的坍塌潜力(CP)从不稳定土壤的中等严重程度提高到所有使用不同稳定剂的稳定土壤的中等程度。因此,使用这些纳米材料进行稳定可以部分提高所测试黄土的坍塌潜力。最有效的改进是含有 0.2% NCC 的稳定样品,它在固化 28 天后产生最高的 UCS。此外,固结试验结果表明,所测试的稳定黄土的坍塌潜力(CP)从不稳定土壤的中等严重程度提高到所有使用不同稳定剂的稳定土壤的中等程度。因此,使用这些纳米材料进行稳定可以部分提高所测试黄土的坍塌潜力。最有效的改进是含有 0.2% NCC 的稳定样品,它在固化 28 天后产生最高的 UCS。此外,固结试验结果表明,所测试的稳定黄土的坍塌潜力(CP)从不稳定土壤的中等严重程度提高到所有使用不同稳定剂的稳定土壤的中等程度。因此,使用这些纳米材料进行稳定可以部分提高所测试黄土的坍塌潜力。固结试验结果表明,所测试的稳定黄土的坍塌潜力程度(CP)从不稳定土壤的中等严重程度提高到所有使用不同稳定剂的稳定土壤的中等程度。因此,使用这些纳米材料进行稳定可以部分提高所测试黄土的坍塌潜力。固结试验结果表明,所测试的稳定黄土的坍塌潜力程度(CP)从不稳定土壤的中等严重程度提高到所有稳定土壤的中等程度,使用不同的稳定剂。因此,使用这些纳米材料进行稳定可以部分提高所测试黄土的坍塌潜力。
更新日期:2020-11-23
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