Abstract
Microbially induced calcium carbonate precipitation (MICP) uses the metabolic function of microbes to carry out biochemical reactions with other substances in the environment. Through the controlled growth of inorganic minerals, soil particles are cemented and soil pores are filled to solidify the soil and reduce its permeability. Thus, the application of this technology was foreseen in geotechnical engineering and environment (building antiseepage, contaminated soil restoration, slope soil erosion, and sand liquefaction). In this review article, based on current research findings, the urea hydrolysis and the cementation mechanism of MICP are briefly described. The influences of factors such as enzyme activity, cementation solution concentration, pH, temperature, grouting method, and particle size on MICP-treated soil are discussed. The engineering properties of MICP-treated soils are evaluated, for instance, the strength, stiffness, liquefaction resistance, permeability, and durability. The applications of MICP technology in ground improvement, geotechnical seepage control, foundation erosion resistance, and fixation of heavy metals are summarized. Finally, future directions of the development of MICP technology are elucidated to provide a reference and guidance for the promotion of MICP technology in the geotechnical engineering field.
Highlights
With the rapid socioeconomic development and accelerated urbanization, urban infrastructure construction is facing unprecedented development worldwide
As a new research branch in geotechnical engineering, microbial environmental geotechnical engineering is an interdisciplinary subject of microbiology, chemistry, and geotechnical engineering that has been developed for over a decade. e biochemical reaction process of Microbially induced calcium carbonate precipitation (MICP) is detailed in this review article, and the factors influencing MICP-treated soil are discussed. e relevant findings regarding MICP technology in applications such as ground improvement, rock-soil seepage control, ground erosion resistance, and contaminated soil remediation are summarized. e findings described in this review can provide a reference for the development and application of MICP technology in the geotechnical engineering field
This review article provides a reference for the development of MICP technology in the field of geotechnical engineering. e main conclusions are as follows: (1) MICP is a common microbial mineralization phenomenon in nature. rough metabolic reactions, MICP absorbs, transforms, removes, and degrades substances in the environment
Summary
With the rapid socioeconomic development and accelerated urbanization, urban infrastructure construction is facing unprecedented development worldwide In this process, a series of engineering challenges exist, including improvement of weak ground, treatment of liquefied soil, remediation of contaminated soil, seepage and leakage control on dams, and dust and sand fixation. MICP technology exhibits greater potential for application and environmental sustainability in geotechnical engineering area and is suggested as a feasible alternative by many researchers [2,3,4]. Whiffin [7] was the first to propose the use of MICP technology for cement loose sand particles to improve soil mechanical properties such as the sand strength and stiffness of sand. E relevant findings regarding MICP technology in applications such as ground improvement, rock-soil seepage control, ground erosion resistance, and contaminated soil remediation are summarized. As a new research branch in geotechnical engineering, microbial environmental geotechnical engineering is an interdisciplinary subject of microbiology, chemistry, and geotechnical engineering that has been developed for over a decade. e biochemical reaction process of MICP is detailed in this review article, and the factors influencing MICP-treated soil are discussed. e relevant findings regarding MICP technology in applications such as ground improvement, rock-soil seepage control, ground erosion resistance, and contaminated soil remediation are summarized. e findings described in this review can provide a reference for the development and application of MICP technology in the geotechnical engineering field
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
