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Open AccessArticle

Effects of Ground Conditions on Microbial Cementation in Soils

1
Department of Civil Engineering, Chosun University, 375, Seosuk-Dong, Dong-Gu, Gwangju 501-759, Korea
2
Department of Civil and Environmental Engineering, Incheon National University, Incheon 406-772, Korea
*
Author to whom correspondence should be addressed.
Materials 2014, 7(1), 143-156; https://doi.org/10.3390/ma7010143
Received: 25 September 2013 / Revised: 6 December 2013 / Accepted: 23 December 2013 / Published: 27 December 2013
(This article belongs to the Special Issue Construction Materials)
The purpose of this study is to understand the effect of ground conditions on microbial cementation in cohesionless soils. Since the method of microbial cementation is still at the experimental stage, for its practical use in the field, a number of laboratory experiments are required for the quantification of microbial cementation under various ground conditions, such as relative densities, relative compactions and particle size distributions. In this study, in order to evaluate the effectiveness of microbial cementation in treated sands and silts, an experiment was performed for different relative densities of silica sands, for different relative compactions of silts and for different particle size distributions of weathered soils sampled from the field. Scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) spectroscopy and mapping analyses were implemented for the quantification of the levels of microbial cementations for sand, silt and weathered soil specimens. Based on the test results, a considerable microbial cementation was estimated depending on the soil conditions; therefore, an implementation of this new type of bio-grouting on a weak foundation may be possible to increase the strength and stiffness of weak ground. View Full-Text
Keywords: microbe; CaCO3; SEM; XRD; EDX; cementation; ground condition microbe; CaCO3; SEM; XRD; EDX; cementation; ground condition
MDPI and ACS Style

Kim, D.; Park, K.; Kim, D. Effects of Ground Conditions on Microbial Cementation in Soils. Materials 2014, 7, 143-156.

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