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http://dx.doi.org/10.7843/kgs.2021.37.4.39

A Study on Enzyme-induced Carbonate Precipitation Technique for Soil Reinforcement without Releasing an Environmental Contaminant  

Lee, Seung-Hyung (Dept. of Civil and Environmental Engrg., Sejong Univ.)
Kim, Jong-Min (Dept. of Civil and Environmental Engrg., Sejong Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.37, no.4, 2021 , pp. 39-47 More about this Journal
Abstract
Recently, the enzyme-induced carbonate precipitation (EICP) technique has been considered as one of the alternatives to the cement-based soil reinforcing method. However, the problem with the emission of ammonium ion has not been solved. In this study, an experimental study on the EICP without releasing an environmental contaminant (Ze-EICP) is performed using calcium-exchanged zeolite. The results show that the Ze-EICP using calcium-exchanged zeolite reduced the amount of ammonium ions by 96.96% and precipitated almost the same amount of calcium carbonate, compared to the EICP using calcium chloride. In addition, the Ze-EICP shows higher strength improvement rate than the EICP due to densification of zeolite and cementation of calcium carbonate.
Keywords
Soil reinforcement; Cementation; Calcium carbonate; Cation exchange; Zeolite;
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Times Cited By KSCI : 1  (Citation Analysis)
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