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http://dx.doi.org/10.14481/jkges.2017.18.10.15

Characteristics of Strength Change of Clay Mixing Eco-friendly Soil Binder and Microorganism  

Kim, Taeyeon (Department of Civil Engineering, Korea National University of Transportation)
Park, Jongseo (Department of Civil Engineering, Korea National University of Transportation)
Lee, Bongjik (Department of Civil Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korean GEO-environmental Society / v.18, no.10, 2017 , pp. 15-22 More about this Journal
Abstract
The soil improvement method so far has been developed with an emphasis on enhancing the strength of the ground. A soil improvement method using a excellent cementitious stabilizer in economical efficiency and handling property is mainly used. The soil improvement method using cementitious stabilizer is effective but environmental and human harmful substances are detected and environmental problems such as carbon dioxide emission and groundwater pollution are pointed out. Therefore, as part of an alternative method capable of solving such problems, researches on the soil improvement method incorporating biological technology are being actively carried out. This study was conducted to investigate the characteristics of strength change when mixed with environmentally friendly soil binder and microorganism in clay, and it was analyzed by uniaxial compression test, direct shear test, SEM, XRD. As a results of the test, we confirmed the cementation caused by microbially induced calcite precipitation and the strength increase enhancement by it.
Keywords
Eco-friendly soil binder; Microorganism; Calcium carbonate; Strength development;
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