Corrosion analysis of concrete based on industrial waste and bacteria by non-destructive test methods

Corrosion of concrete can lead to cracking and a decline in serviceability, necessitating effective methods to minimize the risk of corrosion. This study investigates the use of pozzolanic materials, specifically fly ash, bottom ash, and silica fume, combined with Bacillus subtilis bacteria as fillers to enhance the concrete structure’s resistance to corrosion. The research involves substituting fly ash (15–25%) and silica fume (5–15%) for cement by weight, alongside replacing sand with bottom ash at 15%. Additionally, Bacillus subtilis is incorporated into all pozzolanic concrete specimens. The study evaluates the mechanical properties of the concrete and employs non-destructive testing to correlate the physical condition with test results while preserving the structural integrity. The findings demonstrate that the inclusion of fly ash, bottom ash, silica fume, and Bacillus subtilis bacteria improves the mechanical properties of the concrete and effectively reduces the rate of corrosion, highlighting the potential for these materials to enhance the durability of concrete structures.