Mechanical and Micro-structural Characteristics of Coastal Cement Soil Modified by Nano-MgO

ZHANG Chen; LI Na; WANG Wei; YUAN Jun-ping; JIANG Ping; WU Wang-yi; FU Ke-xian

doi:10.11988/ckyyb.20180910

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Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (4) : 135-139. DOI: 10.11988/ckyyb.20180910

HE 28TH NATIONAL SYPOSIUM ON GEOTECHNICAL TESTING

Mechanical and Micro-structural Characteristics of Coastal Cement Soil Modified by Nano-MgO

ZHANG Chen¹, LI Na¹, WANG Wei^1,2, YUAN Jun-ping³, JIANG Ping¹, WU Wang-yi¹, FU Ke-xian¹

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Abstract

To investigate the effect of nano-MgO on cement-treated seashore soil, mechanical test and microscopic test were conducted on nano-MgO modified cement-treated seashore soil (NmCS). The mechanical performances of NmCS samples with varied cement content and nano-MgO content were examined via indoor direct shear test. Furthermore, the micro-structural characteristics and mechanism were studied by using SEM technology. Test result unveiled that: (1) there exists an optimum content of nano-MgO for NmCS. Specifically in the test of the present research, the optimum content of nano-MgO is 10‰. (2) Cement-treated seashore soil in the absence of nano-MgO is dominated by loose-structure and small particles; while NmCS with 10‰ nano-MgO is the most compact, reflected as in the improvement of mechanical strength.

Key words

coastal cement soil / nano-MgO / shear strength / SEM / micro-structure / mix ratio

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ZHANG Chen, LI Na, WANG Wei, YUAN Jun-ping, JIANG Ping, WU Wang-yi, FU Ke-xian. Mechanical and Micro-structural Characteristics of Coastal Cement Soil Modified by Nano-MgO[J]. Journal of Changjiang River Scientific Research Institute. 2019, 36(4): 135-139 https://doi.org/10.11988/ckyyb.20180910

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