Aplicação de bactérias biocimentantes no tratamento de patologias de revestimentos de argamassa

Abstract

Mortar coatings can present several manifestation pathologies, among them the main ones are the formation of cracks or cracks and the breakdown of the mortar. These pathological manifestations present a high cost of repair. To avoid this need for repair, this study points out the treatment of these pathologies by means of biocidal bacteria. The ureolytic bacteria responsible for the production of CaCO3 crystals have the ability to convert urea to carbonate and are found in high percentages in the soil. When extracted, these bacteria are cultured in culture medium containing calcium acetate. These microorganisms present high potential in recovering mortar coatings that present pathological manifestations. To evaluate whether bacteria are capable of treating pathological manifestations in coatings, test bodies have been produced that have been shaped with isolates. No differences in physical properties were found between the specimens that had the bacteria incorporated into the mass. The isolates had a high capacity to resist abrasion wear, presenting more than 60% reduction of disintegrated mass in relation to the samples without the microorganisms, the biociting bacteria showed great capacity to treat faulty mortar coatings even in a short period of application, results that classify them as potential surface protective coating product for mortars.