Microbial-induced carbonate precipitation for coastal erosion mitigation of sandy slopes. Issue 2 (17th June 2020)

• Record Type: Journal Article
• Authors: Shahin, M. A.; Jamieson, K.; Cheng, L.
• Is Part Of: Géotechnique letters. Volume 10:Issue 2(2020)
• Page Start: 211
• Page End: 215
• Publication Date: 2020-06-17
• Subjects: erosion -- ground improvement -- slopes; Geotechnical engineering -- Periodicals; Engineering geology -- Periodicals; 624.151
• DOI: 10.1680/jgele.19.00093
• Languages: English
• ISSNs: 2045-2543

Abstract

Abstract : This paper proposes the use of microbial-induced carbonate precipitation (MICP) for coastal protection against coastal erosion of sandy slopes subjected to wave attack. Bio-cementation through MICP is a new emerging technique for soil stabilisation using the metabolic functions of microorganisms (bacteria), by inducing the formation of calcium carbonate precipitates that bridge soil particles together, leading to increased soil strength and reduced soil erodibility. An experimental approach was carried out to investigate the feasibility of MICP for preventing coastal erosion in shallow waters. A set of six sand samples sloped at 45° was prepared in an acrylic flume apparatus and tested against erosional and accretional surging waves, and the results showed that MICP was able to limit soil erosion to less than 5% for both wave types.