Modification Effect of Nano-Clay on Mechanical Behavior of Composite Geomaterials: Cement, Nano-Silica and Coastal Soft Soil

被引：8

作者：

Wang, Yaying ^{[1
]}

Wang, Wei ^{[1
]}

Zhao, Yinuo ^{[1
]}

Li, Na ^{[1
]}

Luo, Jiale ^{[1
]}

Belete, Asefa Mulugeta ^{[1
]}

Ping, Jiang ^{[1
]}

机构：

[1] Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China

来源：

MATERIALS | 2022年 / 15卷 / 24期

关键词：

nano-material; cement soil; compressive strength; shear strength; ductility index; Duncan-Chang model; UNCONFINED COMPRESSIVE STRENGTH; NANO-SIO2; DUCTILITY;

D O I：

10.3390/ma15248735

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To study the modification effect of nano-clay and nano-SiO2 on cement-reinforced coastal soft soil, the effects of the nano-SiO2 and nano-clay on the mechanical properties of cement soil were studied through unconfined compressive and unconsolidated undrained shear tests, and the Duncan-Chang model was used to fit the test results. Results show that adding nano-clay and nano-SiO2 to cement soil improved its compressive and shear strength. The compressive strength and shear strength increased by 18-57% and 3-32%, respectively, with the increase in nano-clay content in a content range of 0-10%. Additionally, nano-clay can enhance the ductility of cement soil. Moreover, nano-clay and nano-SiO2 improve the shear strength by increasing the internal friction angle by 1 degrees-2 degrees and cohesion of 9-25%, and the cement-stabilized coastal soft soil enhanced by nano-SiO2 and nano-clay conforms to the Duncan-Chang model well.

引用

页数：12

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