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 Wei1,2, YUAN Jun-ping3, JIANG Ping1, WU Wang-yi1, FU Ke-xian1   

  1. 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 Published:2019-04-01 Online:2019-04-18

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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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