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Review

Review of Enzyme-Induced Calcite Precipitation as a Ground-Improvement Technique

1
Department Civil and Environmental Engineering, IPB University, Bogor 16680, Indonesia
2
Department Civil and Environmental Engineering, Ehime University, Matsuyama 790-8577, Japan
*
Author to whom correspondence should be addressed.
Received: 9 July 2020 / Revised: 25 July 2020 / Accepted: 31 July 2020 / Published: 5 August 2020
(This article belongs to the Special Issue Geomaterials for Transportation Infrastructures)
Calcite-induced precipitation methods (CIPMs) have recently become potential techniques in geotechnical engineering for improving the shear strength of sandy soil. One of the most promising methods among them is enzyme-induced calcite precipitation (EICP). In this technique, a mixed solution composed of reagents and the urease enzyme, which produces calcite, is utilized as the grouting material. The precipitated calcite in granular soil provides ties among the grains of soil and limits their mobility, thus promoting an improvement in strength and stiffness and also a reduction in the hydraulic conductivity of sandy soil. This paper discusses the potential increase in the strength and stiffness of the soil, the additional materials for grouting, the effect of these materials on the treatment process, and the engineering properties of the soil. The possible sources of the urease enzyme and the applicability of the EICP method to other soil types are also discussed in this paper. The environmental and economic impacts of the application of EICP are also presented. The envisioned plans for application, potential advantages, and limitations of EICP for soil stabilization are discussed. Finally, the primary challenges and opportunities for development in future research are briefly addressed. View Full-Text
Keywords: calcite; engineering properties; environmental impact; microstructure; uniformity distribution calcite; engineering properties; environmental impact; microstructure; uniformity distribution
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MDPI and ACS Style

Putra, H.; Yasuhara, H.; Erizal; Sutoyo; Fauzan, M. Review of Enzyme-Induced Calcite Precipitation as a Ground-Improvement Technique. Infrastructures 2020, 5, 66. https://0-doi-org.brum.beds.ac.uk/10.3390/infrastructures5080066

AMA Style

Putra H, Yasuhara H, Erizal, Sutoyo, Fauzan M. Review of Enzyme-Induced Calcite Precipitation as a Ground-Improvement Technique. Infrastructures. 2020; 5(8):66. https://0-doi-org.brum.beds.ac.uk/10.3390/infrastructures5080066

Chicago/Turabian Style

Putra, Heriansyah, Hideaki Yasuhara, Erizal, Sutoyo, and Muhammad Fauzan. 2020. "Review of Enzyme-Induced Calcite Precipitation as a Ground-Improvement Technique" Infrastructures 5, no. 8: 66. https://0-doi-org.brum.beds.ac.uk/10.3390/infrastructures5080066

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