TY - JOUR
T1 - Bio-mediated soil improvement
T2 - An introspection into processes, materials, characterization and applications
AU - Jiang, Ning Jun
AU - Wang, Yi Jie
AU - Chu, Jian
AU - Kawasaki, Satoru
AU - Tang, Chao Sheng
AU - Cheng, Liang
AU - Du, Yan Jun
AU - Shashank, Bettadapura S.
AU - Singh, Devendra N.
AU - Han, Xiao Le
AU - Wang, Yu Ze
N1 - Publisher Copyright:
© 2021 British Society of Soil Science
PY - 2022/1
Y1 - 2022/1
N2 - For a long time in the practice of geotechnical engineering, soil has been viewed as an inert material, comprising only inorganic phases. However, microorganisms including bacteria, archaea and eukaryotes are ubiquitous in soil and have the capacity and capability to alter bio-geochemical processes in the local soil environment. The cumulative changes could consequently modify the physical, mechanical, conductive and chemical properties of the bulk soil matrix. In recent years, the topic of bio-mediated geotechnics has gained momentum in the scientific literature. It involves the manipulation of various bio-geochemical soil processes to improve soil engineering performance. In particular, the process of microbial-induced calcium carbonate precipitation (MICP) has received the most attention for its superior performance for soil improvement. The present work aims to shape a comprehensive understanding of recent developments in bio-mediated geotechnics, with a focus on MICP. Referring to around one hundred studies published over the past five years, this review focuses on popular and alternative MICP processes, innovative raw materials and additives for MICP, emerging tools and testing methodologies for characterizing MICP at multi-scale, and applications in emerging and/or unconventional geotechnical fields.
AB - For a long time in the practice of geotechnical engineering, soil has been viewed as an inert material, comprising only inorganic phases. However, microorganisms including bacteria, archaea and eukaryotes are ubiquitous in soil and have the capacity and capability to alter bio-geochemical processes in the local soil environment. The cumulative changes could consequently modify the physical, mechanical, conductive and chemical properties of the bulk soil matrix. In recent years, the topic of bio-mediated geotechnics has gained momentum in the scientific literature. It involves the manipulation of various bio-geochemical soil processes to improve soil engineering performance. In particular, the process of microbial-induced calcium carbonate precipitation (MICP) has received the most attention for its superior performance for soil improvement. The present work aims to shape a comprehensive understanding of recent developments in bio-mediated geotechnics, with a focus on MICP. Referring to around one hundred studies published over the past five years, this review focuses on popular and alternative MICP processes, innovative raw materials and additives for MICP, emerging tools and testing methodologies for characterizing MICP at multi-scale, and applications in emerging and/or unconventional geotechnical fields.
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U2 - 10.1111/sum.12736
DO - 10.1111/sum.12736
M3 - Review article
AN - SCOPUS:85109274658
SN - 0266-0032
VL - 38
SP - 68
EP - 93
JO - Soil Use and Management
JF - Soil Use and Management
IS - 1
ER -