A Review on Role of Enzymes and Microbes in Healing Cracks in Cementitious Materials

TY - CHAP

T1 - A Review on Role of Enzymes and Microbes in Healing Cracks in Cementitious Materials

AU - Fang, Chaolin

AU - Plaza, Grazyna

AU - Achal, Varenyam

N1 - Publisher Copyright: © Springer Nature Singapore Pte Ltd. 2021.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - Crack is the most common damage in concrete structures and it could compromise the serviceability and durability of concrete. The environmental concerns and sustainability issues associated with cement and concrete necessitate alternative better cracks maintenance and repair strategies. Self-healing concrete has the ability to heal itself, but only is able to heal small cracks that below 0.2 mm and the improvement of crack self-healing performance becomes hotpot of research. Enzyme-induced carbonate precipitation (EICP) and microbially induced calcium carbonate precipitation (MICP) have been widely explored and applied in the improvement of construction materials. The paper briefly documents the advantages and disadvantages of bacteria/fungi-based self-healing and EICP as well as their current and potential applications. For EICP and fungi-based calcite precipitation to heal, current observations reveal that these two techniques hold beneficial prospects for crack self-healing on cementitious composites. Meanwhile, bacteria-based calcite precipitation has been most investigated in self-healing concrete, and its laboratory studies have advanced understanding of bacterial self-healing concrete. Moreover, bacterial self-healing concrete was also brought into large-scale application but it remains various challenges.

AB - Crack is the most common damage in concrete structures and it could compromise the serviceability and durability of concrete. The environmental concerns and sustainability issues associated with cement and concrete necessitate alternative better cracks maintenance and repair strategies. Self-healing concrete has the ability to heal itself, but only is able to heal small cracks that below 0.2 mm and the improvement of crack self-healing performance becomes hotpot of research. Enzyme-induced carbonate precipitation (EICP) and microbially induced calcium carbonate precipitation (MICP) have been widely explored and applied in the improvement of construction materials. The paper briefly documents the advantages and disadvantages of bacteria/fungi-based self-healing and EICP as well as their current and potential applications. For EICP and fungi-based calcite precipitation to heal, current observations reveal that these two techniques hold beneficial prospects for crack self-healing on cementitious composites. Meanwhile, bacteria-based calcite precipitation has been most investigated in self-healing concrete, and its laboratory studies have advanced understanding of bacterial self-healing concrete. Moreover, bacterial self-healing concrete was also brought into large-scale application but it remains various challenges.

KW - Bacteria

KW - Biomineralisation

KW - Concrete

KW - Cracks

KW - Self-healing

UR - http://www.scopus.com/inward/record.url?scp=85122400695&partnerID=8YFLogxK

U2 - 10.1007/978-981-16-1706-5_9

DO - 10.1007/978-981-16-1706-5_9

M3 - 章节

SN - 9789811617058

SP - 151

EP - 162

BT - Building Materials for Sustainable and Ecological Environment

PB - Springer Singapore

ER -