摘要
混凝土材料在实际服役阶段常常受到力学和环境因素的耦合作用,因“湿–热–化学–力”复杂应力使其内部较易产生微裂缝,有利于水分及腐蚀性离子的侵入,从而加速了钢筋混凝土结构耐久性劣化过程。为了延缓严酷环境下混凝土力学及耐久性能劣化过程,目前学者们通过微生物矿化技术对混凝土裂缝自愈合机理展开了大量研究。基于混凝土自愈合机理,针对微生物愈合的实现方式及其对耐久性的影响,对矿化作用下水泥基材料微生物自愈合研究进行了总结和讨论,最后综述了不同类型微生物诱导碳酸钙沉淀技术在水泥基材料中的应用。
Concrete materials in service are often affected by the coupling action of mechanical and environmental factors.Microcracks inside concrete occur due to the complex stress induced by the combined action of moisture,heat,chemistry and mechanics,promoting the ingress process of water and aggressive ions and further accelerating the durability degradation process of reinforced concrete structures.In order to delay the deterioration of mechanical properties and durability of concrete under severe environments,the self-healing mechanisms of crack within concrete crack through the microbial mineralization technology were investigated.Based on the mechanism of self-healing concrete and regarded the realization mode of microbial healing and its influence on durability of concrete,recent studies on the microbial self-healing of cement-based materials under mineralization were summarized.Finally,the application of different types of microbial-induced calcium carbonate precipitation technology in cement-based materials was represented.
作者
张鹏
郭得阳
鲍玖文
寇海磊
薛善彬
赵铁军
ZHANG Peng;GUO Deyang;BAO Jiuwen;KOU Hailei;XUE Shanbin;ZHAO Tiejun(Department of Civil Engineering,Qingdao University of Technology,Qingdao 266033,Shandong,China;College of Engineering,Ocean University of China,Qingdao 266100,Shandong,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2022年第2期544-554,共11页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51922052,51778309,51908307,U1706222)
山东省“双一流”建设工程-土木。
关键词
混凝土
矿化作用
微生物
自愈合
耐久性
concrete
mineralization
microbe
self-healing
durability
