Recent development on optimization of bio-cementation for soil stabilization and wind erosion control

作者：Jia He, Yang Liu, Lingxiao Liu, Boyang Yan, Liangliang Li, Hao Meng, Lei Hang, Yongshuai Qi, Min Wu, Yufeng Gao · 发表于：Biogeotechnics · 年份：2023 · DOI：10.1016/j.bgtech.2023.100022 · 被引用次数：89 · 研究领域：Microbial Applications in Construction Materials、Grouting, Rheology, and Soil Mechanics、Geotechnical Engineering and Soil Stabilization

This paper reviews and analyzes recent research development on bio-cementation for soil stabilization and wind erosion control. Bio-cement is a type of cementitious materials by adopting natural biological processes for geotechnical and construction applications. Bio-cementation is usually achieved through microbially- or enzyme-induce carbonate precipitation (MICP or EICP). The use of soybean urease can be a cost-effective solution for carbonate precipitation and bio-cementation, which are named SICP. The produced calcium carbonate can cement soil particles and bring considerable strength improvement to soils. In this paper, the mechanisms and recent development on the technology optimization are reviewed first. The optimization of bio-cementation involves 1) altering the treatment materials and procedures such as using lysed cells, low pH, the salting-out technique; and 2) using cheap and waste materials for bio-cement treatment and bacterial cultivation. The objectives are to improve treatment uniformity and efficiency, use bio-cement in more scenarios such as fine-grain soils, and reduce costs and environmental impacts, etc. Studies on the mechanical behaviour and wind erosion performances of bio-cemented soil show that the wind erosion resistance can be improved significantly through the bio-cement treatment. In addition, the use of optimized method and additives such as xanthan gum and fibers can further enhance the strength, treatment uniformity or ductility of the bio...