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

doi:10.11988/ckyyb.20180910

JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2019, Vol. 36 ›› Issue (4): 135-139.DOI: 10.11988/ckyyb.20180910

• HE 28TH NATIONAL SYPOSIUM ON GEOTECHNICAL TESTING • Previous Articles Next Articles

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

1.School of Civil Engineering, Shaoxing University, Shaoxing 312000, China;
2.Department of Civil ＆ Environment Engineering, National University of Singapore, Kent Ridge 117576, Singapore;
3.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China

Received:2018-08-22 Revised:2018-10-05 Online:2019-04-01 Published:2019-04-18

Abstract

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

CLC Number:

TU411.6

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 YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2019, 36(4): 135-139.

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

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