摘要
Abstract
Microbial-induced calcium carbonate precipitation(MICP)technology represents a green and innovative approach in the field of concrete crack self-repair,with broad application prospects.This paper from a purely theoretical perspective systematically elucidates the core theoretical foundations of MICP technology from a purely theoretical perspective,including the selection principles of functional microorganisms,the chemical reaction mechanisms of mineralization and deposition,and the theoretical models of the self-repair process.It also qualitatively analyzes the impact of microbial characteristics,crack features,and environmental conditions on repair efficacy,while proposing suitable application scenarios and optimization directions for the technology.The study reveals that urease-producing microorganisms serve as the core functional units of MICP technology,achieving crack filling through a chain reaction of"urea hydrolysis-carbonate generation-calcium carbonate deposition."The optimal repair efficacy is observed when the crack width is≤0.4 mm and the microbial concentration ranges from 107 to 108 CFU/mL.A mild temperature and humidity environment promotes the mineralization reaction.关键词
微生物矿化/混凝土裂缝/自修复Key words
Microbial mineralization/Concrete crack/Self-repair分类
建筑与水利
