COMPARATIVE EXPERIMENTAL RESEARCH OF MECHANICAL PROPERTIES BETWEEN SAND CEMENTED BY MICROBIALLY INDUCED CARBONATE PRECIPITATION AND CEMENT

ZHAO Xiaowan; LYU Jin; WANG Meihua; HUANG Mufan; XU Pengxu; PENG Jie

doi:10.13204/j.gyjzG20052521

Volume 50 Issue 12

Mar. 2021

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ZHAO Xiaowan, LYU Jin, WANG Meihua, HUANG Mufan, XU Pengxu, PENG Jie. COMPARATIVE EXPERIMENTAL RESEARCH OF MECHANICAL PROPERTIES BETWEEN SAND CEMENTED BY MICROBIALLY INDUCED CARBONATE PRECIPITATION AND CEMENT[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(12): 15-18,49. doi: 10.13204/j.gyjzG20052521

Citation:

ZHAO Xiaowan, LYU Jin, WANG Meihua, HUANG Mufan, XU Pengxu, PENG Jie. COMPARATIVE EXPERIMENTAL RESEARCH OF MECHANICAL PROPERTIES BETWEEN SAND CEMENTED BY MICROBIALLY INDUCED CARBONATE PRECIPITATION AND CEMENT[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(12): 15-18,49. doi: 10.13204/j.gyjzG20052521

Citation:

ZHAO Xiaowan, LYU Jin, WANG Meihua, HUANG Mufan, XU Pengxu, PENG Jie. COMPARATIVE EXPERIMENTAL RESEARCH OF MECHANICAL PROPERTIES BETWEEN SAND CEMENTED BY MICROBIALLY INDUCED CARBONATE PRECIPITATION AND CEMENT[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(12): 15-18,49. doi: 10.13204/j.gyjzG20052521

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COMPARATIVE EXPERIMENTAL RESEARCH OF MECHANICAL PROPERTIES BETWEEN SAND CEMENTED BY MICROBIALLY INDUCED CARBONATE PRECIPITATION AND CEMENT

doi: 10.13204/j.gyjzG20052521

ZHAO Xiaowan^1,2,
LYU Jin³,
WANG Meihua³,
HUANG Mufan^1,2,
XU Pengxu^1,2,
PENG Jie^{1,2
,
,}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
2. Jiangsu Research Center for Geotechnical Engineering Technology(Hohai University), Nanjing 210098, China;
3. The Qinhuai River Management Office, Nanjing 210001, China

Received Date: 2020-05-25
Available Online: 2021-03-31

Abstract

Abstract

MICP is a research hotspot in soil improvement in recent years. However, the mechanical properties of sand cemented by MICP and conventional improvement with cement have not been sufficiently compared. To further clarify the mechanical properties of sand columns cemented by MICP and sand columns cemented with cement, sand columns comented by MICP or with cement were made, and the tests of unconfined compressive strength and splitting-tensile strength were performed. The test results showed that: the unconfined strength values of sand columns cemented by MICP with calcium carbonate contents of 7.1% and 10.4% were 221% and 117% of that cemented with cement of contents 7.14% and 10%, its splitting tensile strength were 609% and 228% of that cemented with cement. In a word, when the calcium carbonate content was as similar as the cement content, the unconfined compressive strength and splitting-tensile strength of sand columns cemented by MICP were higher than those of cement mortar.
- microbially induced carbonate precipitation,
- sand column cemented by MICP,
- sand column camented with cement,
- strength

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