Mechanical properties of silty clay soil treated with a mixture of lime and zinc oxide nanoparticles
Mechanical properties of silty clay soil treated with a mixture of lime and zinc oxide nanoparticles
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DOI：
10.1016/j.conbuildmat.2021.122548
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发表时间：
2021-02-20
影响因子：
7.4
通讯作者：
Mohammadi, Mostafa
中科院分区：
文献类型：
--
作者：
Khodaparast, Mahdi;Rajabi, Ali M.;Mohammadi, Mostafa
采用单轴抗压强度、直剪试验和加州承载比试验，并通过扫描电镜观察改良后的试样微观结构，研究了氧化锌（ZnO）纳米颗粒对石灰稳定粉质粘土土工性能的影响。最佳石灰掺量为6%时，土样的强度有所提高。对养护7天的试件进行的试验表明，其强度随着土的粘聚力和水泥粘结力的增加而增加。极限强度记录在最佳纳米ZnO含量为1.5。纳米氧化锌作为填料在石灰和氧化锌稳定的标本，导致形成较小的晶体和增加的反应性，这增加了土样的强度。SEM显微照片显示，纳米ZnO的加入，更均匀，更精细的微观结构与较低的表面孔隙率。(C)2021爱思唯尔有限公司保留所有权利。
The present study investigated the effect of zinc oxide (ZnO) nanoparticles on the geotechnical properties of lime-stabilized silty clay soil using uniaxial compressive strength, direct shear and Californian bearing ratio tests as well as scanning electron microscopy of the improved microstructure of the specimens. The optimum lime content of 6% increased the strength of the soil specimens. Tests on the specimens cured for 7 days showed that their strength increased with an increase in the soil cohesion and cement bonds. The ultimate strength was recorded at the optimum nano-ZnO content of 1.5. The nano-ZnO acted as a filler in the lime and ZnO-stabilized specimens, causing formation of smaller crystals and increasing reactivity, which increased the strength of the soil specimens. SEM micrographs revealed a more homogenous and finer microstructure with a lower surface porosity with the addition of nano-ZnO. (C) 2021 Elsevier Ltd. All rights reserved.