BIOMODIFICATION OF BUILDING MATERIALS BY BACTERIA WITH UREASE ACTIVITY

Abstract

This article uses research results that allow you to get self-healing building materials based on mineral binders. This happens by adding microcontainers to dissolved mixtures, which use nutrients for bacteria with urease activity, which produce calcium carbonate, which fills microdefects in the material. The research results include the use of active forming bacteria, as well as their effect on various properties of modified mortars. To obtain soluble mixtures with different pH values, Portland cement and gypsum binder were used. Indicators of their active work. In this work, the dependence of the aquatic environment on the concentration of biomass in the dissolved building mixture, the dependence on the aquatic environment and microorganisms is shown. The results are associated with the presence of biological surfactants in bacterial cells, which have a significant effect on the rheological properties of cement-sand mortars. A change in the setting time and strength characteristics of cement-sand mortars at various cell concentrations