Concrete has long been a staple in construction, but its vulnerability to cracking poses a significant challenge. Dr. Congrui Grace Jin, an assistant professor in the Department of Engineering Technology and Industrial Distribution, has delved into nature’s blueprint to develop a groundbreaking solution that could revolutionize the industry.
In a recent publication in Materials Today Communications, Dr. Jin introduces a synthetic lichen system designed to enable concrete to heal itself, much like human skin regenerating after a wound. This innovative approach draws inspiration from the symbiotic relationship between fungi and algae in natural lichens, which allows them to thrive in harsh conditions.
The conventional process of creating concrete involves mixing various materials like crushed stone, sand, clay, and limestone, which harden through hydration. However, external factors such as freeze-thaw cycles, drying shrinkage, and heavy loads can lead to cracks, compromising the structural integrity of concrete buildings and infrastructure.
Dr. Jin’s research addresses the limitations of existing self-healing concrete methods, which often require external nutrients for repair materials to be produced continuously. By harnessing the unique capabilities of cyanobacteria and filamentous fungi in a synthetic lichen system, concrete can autonomously heal itself without the need for external intervention.
Lab tests have demonstrated the effectiveness of this microbial duo in producing crack-filling minerals, even in challenging environments like concrete. Beyond the lab, Dr. Jin is working with social science experts to explore public perceptions and ethical considerations surrounding the use of living organisms in construction.
The implications of self-healing concrete are vast, with the potential to reduce maintenance costs, enhance safety, and prolong the lifespan of structures. This technology could revolutionize sustainable construction practices and find applications in various sectors, including space infrastructure.
As research continues to advance, the possibilities for self-healing concrete are endless. Dr. Jin’s work exemplifies the intersection of nature-inspired innovation and engineering excellence, paving the way for a more resilient and sustainable built environment.
For more information on this groundbreaking research, refer to the publication in Materials Today Communications by Nisha Rokaya et al. (2025). DOI: 10.1016/j.mtcomm.2025.112093.
