Microbial self-healing of cracks in cement-based materials and its influencing factors

IF 2.9 3区工程技术 Q2 ENGINEERING, CIVIL Frontiers of Structural and Civil Engineering Pub Date : 2023-12-29 DOI:10.1007/s11709-023-0986-6

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Abstract

Cement-based materials are brittle and crack easily under natural conditions. Cracks can reduce service life because the transport of harmful substances can cause corrosion damage to the structures. This review discusses the feasibility of using microbial self-healing agents for crack healing. Tubular and spherical carriers can be used to load microbial self-healing agents and protect microbes, which prolongs the self-healing time. The area self-healing ratio, permeability, mechanical strength, precipitation depth method, numerical modeling, and ultrasonic method can be employed to identify the self-healing effect of cracks. Moreover, the self-healing mechanism is systematically analyzed. The results showed that microbial self-healing agents can repair cracks in cement-based materials in underground projects and dam gates. The difficulties and future development of self-healing cracks were analyzed. A microbial self-healing agent was embedded in the cement-based material, which automatically repaired the developing cracks. With the development of intelligent building materials, self-healing cracks have become the focus of attention.

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水泥基材料裂缝的微生物自愈合及其影响因素

摘要水泥基材料很脆，在自然条件下很容易开裂。裂缝会缩短使用寿命，因为有害物质的迁移会对结构造成腐蚀破坏。本综述讨论了使用微生物自愈合剂进行裂缝愈合的可行性。管状和球状载体可用于装载微生物自愈合剂和保护微生物，从而延长自愈合时间。可采用面积自愈率、渗透率、机械强度、沉淀深度法、数值建模和超声波法来确定裂缝的自愈效果。此外，还对自愈合机理进行了系统分析。结果表明，微生物自愈剂可以修复地下工程和水坝闸门中水泥基材料的裂缝。分析了自愈合裂缝的难点和未来发展。在水泥基材料中嵌入微生物自修复剂，可自动修复发展中的裂缝。随着智能建筑材料的发展，自修复裂缝已成为人们关注的焦点。

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来源期刊

Frontiers of Structural and Civil Engineering Engineering-Architecture

CiteScore

5.20

自引率

3.30%

发文量

734

期刊介绍： Frontiers of Structural and Civil Engineering is an international journal that publishes original research papers, review articles and case studies related to civil and structural engineering. Topics include but are not limited to the latest developments in building and bridge structures, geotechnical engineering, hydraulic engineering, coastal engineering, and transport engineering. Case studies that demonstrate the successful applications of cutting-edge research technologies are welcome. The journal also promotes and publishes interdisciplinary research and applications connecting civil engineering and other disciplines, such as bio-, info-, nano- and social sciences and technology. Manuscripts submitted for publication will be subject to a stringent peer review.