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Bio-mediated soil improvement: the way forward
(Wiley, 2020) Jiang, Ning-Jun; Tang, Chao-Sheng; Hata, Toshiro; Courcelles, Benoit; Dawoud, Osama; Singh, Devendra N.
Bio-mediated soil improvement involves the usage of microbes to improve soil engineering performance through a series of bio-geochemical processes. In particular, Microbially Induced Calcite Precipitation (MICP), a ubiquitous bio-geochemical process that occurs in soil and results in permanent inorganic cementation between soil grains, has received the greatest research focus. While substantial progress has been made to develop MICP as a mainstream soil improvement technique, we still need to: (a) improve our understanding of the fundamental microbial, chemical and flow processes involved; (b) achieve multi-functionality by coupling engineering performance enhancement with ecological, environmental and carbon footprint benefits; and (c) maintain ecological balance and environmental friendliness, avoid long-term deterioration and lower the energy demand.