Improving the mechanical behaviour of clay contaminated with glycerol and anthracene using lime and Portland cement

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-10-29 DOI:10.1080/17486025.2021.1992515

A. Hamidi, Mohammad Hajimohammadi

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引用次数: 2

Abstract

ABSTRACT The specimens of contaminated clay improved with Portland cement and lime were cured for seven days and were subjected to uniaxial compressive strength (UCS) testing. The results for anthracene-contaminated specimens improved with three percent Portland cement (by weight of clay) were approximately equivalent to those improved with 10% lime. The results for glycerol-contaminated specimens improved with nine percent Portland cement was approximately equivalent to that improved with 10% lime. According to the results, both Portland cement and lime were able to improve the clay soil contaminated with anthracene and glycerol, but Portland cement had a greater effect than lime on the anthracene-contaminated specimens because of the non-polar behaviour of anthracene and the grain-like (flocculated) behaviour of the contaminated soil. These factors were the result of a decrease in the diffuse double layer thickness by anthracene, which has a lower dielectric constant relative to water. The lime had a greater effect than cement on the specimens contaminated with glycerol because of the polar behaviour of glycerol, the increase in the required moisture content for hydration, and because the dielectric constant of glycerol is close to that of water. These results were evaluated and confirmed by scanning electron microscopy.

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用石灰和硅酸盐水泥改善甘油和蒽污染粘土的力学性能

采用硅酸盐水泥和石灰改性污染粘土试件进行7 d养护，并进行单轴抗压强度(UCS)试验。用3%波特兰水泥(按粘土重量计)改善的蒽污染标本的结果与用10%石灰改善的结果大致相当。用9%波特兰水泥改善甘油污染标本的结果与用10%石灰改善的结果大致相当。结果表明，波特兰水泥和石灰均能改善蒽和甘油污染的粘土，但由于蒽的非极性行为和污染土壤的粒状(絮凝)行为，波特兰水泥对蒽污染试样的改善效果大于石灰。这些因素是由于相对于水具有较低介电常数的蒽降低了扩散双层厚度的结果。石灰比水泥对受甘油污染的试样的影响更大，因为甘油的极性行为，水化所需水分含量的增加，以及甘油的介电常数接近于水的介电常数。用扫描电镜对这些结果进行了评价和证实。

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来源期刊

Geomechanics and Geoengineering-An International Journal ENGINEERING, GEOLOGICAL-

CiteScore

3.80

自引率

0.00%

发文量

期刊介绍： Geomechanics is concerned with the application of the principle of mechanics to earth-materials (namely geo-material). Geoengineering covers a wide range of engineering disciplines related to geo-materials, such as foundation engineering, slope engineering, tunnelling, rock engineering, engineering geology and geo-environmental engineering. Geomechanics and Geoengineering is a major publication channel for research in the areas of soil and rock mechanics, geotechnical and geological engineering, engineering geology, geo-environmental engineering and all geo-material related engineering and science disciplines. The Journal provides an international forum for the exchange of innovative ideas, especially between researchers in Asia and the rest of the world.