Strength-increase mechanism and microstructural characteristics of a biotreated geomaterial

作     者：Chi LI Siriguleng BAI Tuanjie ZHOU Hanlong LIU Xiao QIN Shihui LIU Xiaoying LIU Yang XIAO Chi LI;Siriguleng BAI;Tuanjie ZHOU;Hanlong LIU;Xiao QIN;Shihui LIU;Xiaoying LIU;Yang XIAO

作者机构：College of Civil EngineeringInner Mongolia University of TechnologyHohhot 010051China College of ScienceInner Mongolia University of TechnologyHohhot 010051China College of Civil EngineeringChongqing UniversityChongqing 400045China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2020年第14卷第3期

页      面：599-608页

核心收录：

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：This study was sponsored by the National Natural Science Foundation of China(Grant Nos.51668050,51968057) the Natural Science Foundation of Inner Mongolia Autonomous Region of China(Nos.2018MS01014,2019MS05075) 

主　　题：biotreated geomaterial microbially induced calcite precipitation strength-increase mechanism microstructural characteristics 

摘      要：Microbially induced calcite precipitation(MICP)is a recently proposed method that is environmentally friendly and has considerable potential applications in artificial biotreated *** artificial biotreated geomaterials are produced based on the MICP technology for different parent *** purpose of this study is to explore the strength-increase mechanism and microstmctural characteristics of the biotreated geomaterial through a series of *** results show that longer mineralization time results in higher-strength biotreated *** strength growth rate rapidly increases in the beginning and remains stable *** calcium ion content significantly increases with the extended mineralization *** standard sand was used as a parent soil,the calcium ion content increased to a factor of 39 after 7 *** bacterial cells with attached calcium ions serve as the nucleus of crystallization and fill the pore *** fine sand was used as a parent soil,the calcium ion content increased to only a factor of 7 after 7 days of *** nucleus of crystallization could not normally grow because of the limited pore *** porosity and variation in porosity are clearly affected by the parent ***,the strength of the biotreated geomaterial is affected by the parent soil properties,mineralization time,and granular material pore *** paper provides a basis for theory and experiments for biotreated geomaterials in future engineering practice.