[Colonization and destruction of concrete by mitosporic fungi in model experiment].

When investigating the action of microscopic fungi of genera Aspergillus, Alternaria, Cladosporium and Paecilomyces on concrete specimens in the model system, it was shown that the fungi can colonize successfully the concrete surface during 1 year and cause its destructive changes. However the fungi did not colonize those sections of concrete surface which were filled with granite. The fungi leached chemical elements of concrete into nutrition medium, accumulated them in their biomass and caused their transformation into newly-formed crystals of calcium oxalates on the surface of concrete.

[Leaching of calcium, silicon, aluminum and iron from micromycetes grown in submerged culture in the presence of ground concrete]. / Vyshchelachivanie kal'tsiia, kremniia, aliuminiia i zheleza pri roste mikromitsetov v prisutstvii izmel'chennogo betona v usloviiakh glubinnogo kul'tivirovaniia.

The leaching of chemical elements from concrete by microfungi of genera Aspergillus and Cladosporium during fungal growth on the medium containing ground barrier concrete under submerged conditions has been studied. It was shown that the leaching of chemical elements depended on the process of growth and metabolites excretion, on fungi species and on concrete concentration on the medium. Specificity of metals mobilization by different fungi was found.