Microorganism, Carriers, and Immobilization Methods of the Microbial Self-Healing Cement-Based Composites: A Review

Low tensile strength, poor elastic modulus, and complex concrete cracking work condition are almost unavoidable due to the intrinsic brittleness. To deal with concrete maintenance and durability, microbial self-healing concretes have been rapidly developed and widely applied recently. The microbial...

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Published inMaterials Vol. 14; no. 17; p. 5116
Main Authors Shen, Li’an, Yu, Wenlu, Li, Lin, Zhang, Tong, Abshir, Ismail Yusuf, Luo, Pingping, Liu, Zhuangzhuang
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 06.09.2021
MDPI
Subjects
Acids
Bacteria
Capital expenditures
Cement
Composite materials
Concrete
Concrete structures
Cracks
Durability
Fractures
Immobilization
Infrastructure
Literature reviews
Microorganisms
Modulus of elasticity
Review
Self healing materials
Sustainable materials
Tensile strength
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Summary:Low tensile strength, poor elastic modulus, and complex concrete cracking work condition are almost unavoidable due to the intrinsic brittleness. To deal with concrete maintenance and durability, microbial self-healing concretes have been rapidly developed and widely applied recently. The microbial self-healing can specifically patch fractures as well as boost the concrete structure’s capacity, durability, and permeability. This paper presents the state-of-the-art in the microbe induced self-healing in cement-based composites. The microorganism and carriers were classified according to the working theory and repair effects. Additionally, the precise efficiency and effect of various technologies are also evaluated for microbial immobilization. Based on the literature review and summary from the perspective of microorganism, carriers, and immobilization methods, challenges and further works are discussed.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma14175116