Self-Healing Concrete: Advancing Durable and Resilient Infrastructure

Concrete, the very basis of modern construction, is vulnerable to cracking, affecting structural stability and escalating upkeep expenditures. Self-healing concrete introduces a pioneering idea where cracking can be independently filled by automatically self-repairing concrete. In this document, major self-healing approaches have been elaborated upon: autogenous healing, encapsulated healing agents, and microbial-induced healing. Autogenous healing employs unused cement particles, whereas encapsulated healing implements microcapsules with healing agents which get liberated as the cracking process initiates. Microbial healing uses bacteria that form calcium carbonate to close cracks. These methods increase crack closure, strength regain, and durability. Self-healing concrete minimizes repair frequency, reduces lifecycle costs, and reduces carbon emissions related to reconstruction. While initial expense is greater, long-term savings make it an attractive solution for critical infrastructure, such as bridges, tunnels, pavements, and marine structures. More investigation is needed to maximize healing efficiency, determine multi-cycle performance, and establish normative test protocols.