Biocementation for Sand Using an Eggshell as Calcium Source
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 10
Abstract
A method to generate biocementation in sand using the microbially induced carbonate precipitation (MICP) process and calcium source produced from eggshell is presented in this paper. Instead of using calcium chloride or other calcium salts, soluble calcium was produced by mixing eggshell with vinegar and used for the MICP process. The compressive strength and permeability of sand treated using this method were measured using unconfined compression and permeability tests. A comparative study between sand samples treated using calcium produced from eggshell and those using calcium chloride with the same concentration of calcium was carried out. The study shows that the effect of the MICP process using calcium produced from eggshell is just as good as that using calcium chloride. The optimum ratio of eggshell and vinegar for the MICP process was established.
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Acknowledgments
We would like to acknowledge that part of this study is supported by Grant No. SUL2013-1 by the Ministry of National Development, Singapore.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 10 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 24, 2015
Accepted: Mar 4, 2016
Published online: May 23, 2016
Published in print: Oct 1, 2016
Discussion open until: Oct 23, 2016
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