Resumo

RAMAN, Vasudev; PHILIP, Nivin  e  BAVEN, Nijo. The Self-Healing Effect on Bacteria-Enriched Steel Fiber-Reinforced SCC. Ing. Investig. [online]. 2022, vol.42, n.2, e202.  Epub 09-Jun-2022. ISSN 0120-5609.  https://doi.org/10.15446/ing.investig.87120.

Steel fiber reinforced self-compacting concrete is well accepted due to its better resistance against segregation and its effective use in congested reinforcements. It has improved ductile properties, and crack propagation is minimal. As the need for sustainable materials increases all over the world, innovative techniques to make concrete more durable become relevant. Concrete is prone to cracks, which make it vulnerable as they debase it and erode the steel support. Bacterial concrete is a progression of current concrete innovation. Limestone-hastening microscopic organisms are brought into concrete during casting, and, when cracking happens due to dampness, microorganisms contribute to mending the breaks. Thereupon, a blend between self-healing attributes and the qualities of steel fiber-fortified self-compacting concrete is presented. In this paper, micro-silica is utilized to substitute Ordinary Portland Cement by up to 30%. Around 1,5% of steel fiber is used in the concrete mix. 20% is shown as an ideal amount for micro-silica substitution. The performance of self-compacting concrete under specific loads and their impact on healing are examined, as well as the quality of the recovered concrete. An overall increase in elasticity and durability over typical self-compacting concrete is seen.

Palavras-chave : self-healing; mechanical properties; bacteria; micro-silica.

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