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.
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页数：12
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