Effect of Wood Fillers on Strength and Biodegradation of Caustic Magnesite
Vladimir Erofeev,
Irina Stepina,
Renat Badamshin,
Victor Afonin,
Vasily Smirnov,
Svetlana Samchenko,
Irina Kozlova
Affiliations
Vladimir Erofeev
Department of Building Materials Science, Federal State Budget Educational Institution of Higher Education “Moscow State University of Civil Engineering (National Research University)“, Yaroslavskoye shosse, 26, Moscow, 129337, Russia
Irina Stepina
Department of Building Materials Science, Federal State Budget Educational Institution of Higher Education “Moscow State University of Civil Engineering (National Research University)“, Yaroslavskoye shosse, 26, Moscow, 129337, Russia
Renat Badamshin
Surveying company OOO PSK-PLUS, Sovetskaya st., 105A, Saransk, Russia
Victor Afonin
Department of Automated Systems of Information Processing and Control National Research Mordovian State University named after N. P. Ogarev; ul. Bolshevistskaya, 68, Saransk, 430005, Russia
Vasily Smirnov
Department of Biochemistry and Biotechnology National Research Lobachevsky State University of Nizhny Novgorod, Gagarin Ave., 70, Nizhny Novgorod, Nizhny Novgorod Region, 603104, Russia
Svetlana Samchenko
Department of Building Materials Science, Federal State Budget Educational Institution of Higher Education “Moscow State University of Civil Engineering (National Research University)“, Yaroslavskoye shosse, 26, Moscow, 129337, Russia
Irina Kozlova
Department of Building Materials Science, Federal State Budget Educational Institution of Higher Education “Moscow State University of Civil Engineering (National Research University)“, Yaroslavskoye shosse, 26, Moscow, 129337, Russia
During their usage, caustic magnesite composites are susceptible to aggressive microbial action. This paper investigated the resistance of wood-filled caustic magnesite composites in a standard filamentous fungi medium. Caustic magnesite composites based on caustic magnesite, filled with wood sawdust from lime, ash, pine, and aspen trees were studied. The compositions were cured using magnesium chloride. The findings showed that composites filled with fine-fraction wood powders exhibited improved strength and resistance properties of caustic magnesite. If this requirement is met, then optimal conditions are created for the formation of an improved matrix in composites with filler and film phase. Tests in the standard medium showed that wood-filled caustic magnesite composites were fungistatic, but not fungicidal. This means that in case of external contamination, wood-filled caustic magnesite composites are susceptible to biodegradation. Tests demonstrated that exposure to the standard fungal medium resulted in an increased mass content and decreased strength of the samples.
