Soil Improvement Using MICP and Biopolymers: A Review

International Research and Innovation Summit 2017

Ashraf, Muhammad Sohail^1 ; Azahar, Syed Baharom^1 ; Yusof, Nur Zulaikha^1

Department of Civil and Environmental Engineering, Universiti Teknologi, Petronas, Bandar Seri Iskandar, Malaysia^1

关键词: Calcite precipitation;    Construction activities;    Geotechnical application;    Ground improvement;    Research opportunities;    Soil improvement;    Soil strengthening;    Unsaturated sand;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/226/1/012058/pdf
DOI  :  10.1088/1757-899X/226/1/012058

来源: IOP

【 摘 要 】

Ground improvement techniques provide strong natural platforms for construction activities and save the need for designing more resistant structures which would have been necessary on weak ground. This paper discusses the biogeotechnical techniques for improving the resistance of unsaturated sand dunes against surficial erosion by natural processes of wave actions and storm surges. Mechanism of microbially induced calcite precipitation (MICP) and its optimization by utilizing sea water and minimal urea usage is discussed. Common factors affecting the MICP process are briefly discussed. Biomineralization using biopolymers is also described along with the soil strengthening mechanisms. Geotechnical applications of some commonly available biopolymers are described briefly. Advantages and limitations in both these mineralization methods are analyzed and some research opportunities are pointed out for future research.