Biological corrosion is one of the key factors that significantly reduces the reliability and durability of building materials, products and structures. It has been established that in order to increase the service life of materials under the influence of microbiological factors, it is advisable to modify their composition with biologically active substances and treat the surface of products with biocidal preparations. The object of the study is composites based on a dry cement plaster mixture and antiseptic additives such as «Sanatex. Universal», «Anti-mold. Lacra» and «DALI® Universal antiseptic». The purpose of the work is to determine the species composition of microorganisms on the surface of samples of cement protective coatings with various biocidal additives and to evaluate their effectiveness. Modification of the developed material compositions was carried out by two methods: direct introduction of a biocidal preparation into the composition of a dry mixture, water at the manufacturing stage, and impregnation of solidified non-additive samples with antiseptic additives. The studied cement composites were aged for 1 year in ground conditions. Microbiological studies have identified the species composition of potential biodestructors of the prevailing materials on the surface. The microbiological effectiveness of the antiseptic additives used has been determined. It was revealed that with both methods of obtaining samples of protective cement coatings, the best results were obtained with the biocidal preparation «Sanatex. Universal», in which the smallest number of microorganisms were observed, settled and developing on the developed materials.
N. Ledyaykin (Tue,) studied this question.