Effects of Coated Infiltrating Organic Silicone in Preventing Microbial Corrosion of Concrete

This study evaluated the effectiveness of a penetrating organosilicon treatment in mitigating microbiologically induced concrete corrosion (MICC) during 240 d of exposure to sewage containing sulfur-oxidizing bacteria (SOB). The environmental sewage variation, morphology inspection, mineral composition, surface roughness, erosion rate, mass change and mechanical performance were systematically investigated for both coated and uncoated samples under half- and fully immersed corrosion conditions, respectively. The infiltrating organic silicone coating would act as the barrier for delaying the intrusion of sulfate ions generated by sulfur-oxidizing bacteria (SOB) and promoting the hydration process within the mortar, thus enhancing the protection of cementitious materials in the aspects of both microscopic and macroscopic measurement.