东南大学学报（自然科学版）2013，Vol.43Issue(2)：360-364,5.DOI:10.3969/j.issn.1001-0505.2013.02.025
混凝土裂缝的微生物自修复效果
Microbial self-healing effects of concrete cracks
摘要
Abstract
The effect of crack self-healing was studied in bacterial concrete by the crack width gauge, scanning electron microscopy and thermogravimetric analysis. The results indicate that after concrete is cured for 40 d, concrete cracks can be filled with calcium carbonate produced by microbial mineralization. The self-healing effect is obvious and the maximum width is greater than 1 mm. The quantity of calcium carbonate is the largest in the openings of concrete crack. And calcium carbonate is gradually reduced with the increase in the crack depth. When the concrete crack depth is over 10 mm, the formation of calcium carbonate is no longer found. When the distance is less than 1.5 mm, microorganisms can produce a large amount of calcium carbonate through mineralization. However, when the distance is greater than 1.5 mm, the content of calcium carbonate gradually reduces with the increase in the depth. The reason is that the microbial mineralization requires oxygen.关键词
混凝土/裂缝/微生物/自修复/效果Key words
concrete/ cracks/ microbial/ self-healing/ effect分类
化学化工引用本文复制引用
钱春香,李瑞阳,潘庆峰,罗勉,荣辉..混凝土裂缝的微生物自修复效果[J].东南大学学报（自然科学版）,2013,43(2):360-364,5.基金项目
国家自然科学基金资助项目(51178104)、教育部博士点基金资助项目(20110092110033). （51178104）
