江苏大学学报（自然科学版）2025，Vol.46Issue(3)：337-343,372,8.DOI:10.3969/j.issn.1671-7775.2025.03.012
混凝土梁受弯裂缝的微生物矿化修复及其抗氯盐侵蚀性能试验
Experiments on microbial mineralization repair of flexural cracks in concrete beams and resistance to chloride attack
摘要
Abstract
To explore the repairing effect of microbial mineralization technology on load-induced cracks in concrete beams,the diffusion method was proposed to repair the vertical flexural cracks of cracked beams under loading and unloading conditions by microbial mineralization.The crack repairing effect was evaluated by chloride attack test.The results show that during the repairing process of microbial mineralization,the calcium carbonate generated in the vertical flexural crack is gradually accumulated from the bottom to top due to gravity until the crack repair is completed.The chloride ion mass fraction at the repaired crack section is significantly lower than that at the same depth of unrepaired crack section.Under the sustain-loading condition,the long-term performance improvement coefficient of chloride attack resistance of cracked beams with average crack width less than 0.120 mm after repairing is more than 74.95％.Within the same range of crack width,the long-term performance improvement coefficient after crack repairing under the unloading condition is about 15％higher than that under the loading condition.关键词
混凝土梁/受弯裂缝/微生物矿化修复/氯盐侵蚀/修复效果Key words
concrete beam/flexural crack/microbial mineralization repair/chloride attack/repairing effect分类
土木建筑引用本文复制引用
陆春华,张虹宇,张云舒,郑玉龙..混凝土梁受弯裂缝的微生物矿化修复及其抗氯盐侵蚀性能试验[J].江苏大学学报（自然科学版）,2025,46(3):337-343,372,8.基金项目
国家自然科学基金资助项目(51878319) （51878319）
