微生物菌落体系对混凝土裂缝自修复效果的影响综述

摘要/Abstract

摘要： 开裂是混凝土结构常见的病害,裂缝为外界水和侵蚀性介质提供了通道,侵蚀性介质的进入会导致混凝土耐久性能加速劣化,严重影响工程结构的服役寿命。为有效阻止有害离子的侵入,延长构件服役期限,裂缝的及时修补是目前建筑业所共同面临的问题。微生物自修复混凝土受到了研究学者的广泛关注,与传统混凝土不同,微生物自修复混凝土赋予结构裂缝自诊断、自修复的功能,其主要修复体系可分为两种:一元修复体系和多元修复体系。本文从两种不同修复体系角度分析了微生物自修复混凝土的修复效果,总结了各体系下面临的关键问题,对比了两种体系下自修复效果的优缺点,并展望了基于微生物矿化的混凝土裂缝自修复研究的发展方向。对已有研究成果总结发现,若以一种具有矿化功能的核心菌体为基础,再加入厌氧型细菌辅助矿化,可实现裂缝深度修复,这种新型矿化体系为基于微生物矿化的自修复混凝土的研究提供了新思路。

关键词: 微生物, 混凝土, 自修复, 裂缝, 修复体系, 微生物矿化

Abstract: Cracking is the most common disease in concrete structure engineering. The crack provides a channel for external water and corrosive media, and the corrosive media will lead to accelerated deterioration of concrete durability and seriously affect the service life of engineering structure. In order to effectively prevent the intrusion of harmful ions and prolong the service life of structures, timely repair of cracks is a common problem faced by the construction industry. Microbial self-healing concrete has received extensive attention from researchers. Unlike traditional concrete, microbial self-healing concrete endows structural cracks with the function of self-diagnosing and self-healing. And there are two main repair systems, namely the one-element repair system and the multi-element repair system. This paper analysed the repair effect of microbial self-healing concrete from the perspective of different repair systems, summarised the key problems faced under each system, compared the advantages and disadvantages of the self-healing effect under both systems, and proposed the development direction of the research on self-healing of concrete cracks based on microbial-induced carbonate precipitation (MICP).The study finds that if a core bacterium with mineralisation function is used as the basis and anaerobic bacteria are added to assist mineralisation, deep crack repair can be achieved, and this new mineralisation system provides an innovative idea for the research of self-healing concrete based on MICP.

Key words: microorganism, concrete, self-healing, crack, repair system, microbial-induced carbonate precipitation

中图分类号:

韩强强, 路伟, 姜鲁, 王亚妹. 微生物菌落体系对混凝土裂缝自修复效果的影响综述[J]. 硅酸盐通报, 2022, 41(9): 2993-3007.

HAN Qiangqiang, LU Wei, JIANG Lu, WANG Yamei. Review on Effect of Microbial Colony System on Self-Healing of Concrete Cracks[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(9): 2993-3007.

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