Bacteria-based self-healing concrete to increase liquid tightness of cracks
نویسندگان
چکیده
Concrete is a remarkable structural material that has been widely used in the modern age. Nevertheless, natural causes that affect durability and consequently service life of concrete are related with surface damage and cracking of the material. Cracks can influence functionality for liquid retaining structures and can also decrease durability due ingress of water and ions towards steel reinforcement, leading to corrosion. In this study, bacteria-based healing agent, namely bacteria spores and their feed are incorporated into Light Weight Aggregates (LWA) and mixed with fresh mortar. By this means the autogenous healing of concrete is enhanced, and upon cracking the material is capable of regaining liquid tightness. Therefore, the service life of the structure is extended and ageing is delayed. The results of this study show that the bacteria-based system appears promising for application in concrete structures to improve crack sealing performance and increase durability aspects of ageing concrete structures.
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