Abstract
Abstract
The aim of the present work is to provide an overview of the predominant microorganisms that effects structures of cementitious composites, which lead to biocorrosion, subsequently to the degradation of cementitious materials. Research is done by sampling of specimens taken from selected parts of the city of Košice. The sampling was mainly focused on insulated apartment panel buildings, part of the specimens was taken from uninsulated concrete and masonry plastered surfaces. Specimens were taken with sterile lab tubes, scalpels, and swabs by using dry, semi-dry and wet methods. The specimens were preserved in the cold place until their performance for the cultivation process. For cultivation purposes were important to prepare basal media for specimens of microorganisms and proceed isolation of cultures and their cultivation on appropriate media, identification of individual cultures. Data obtained after cultivation confirmed presence of predominant fungi genus such as Aspergillus, Botrytis, Cladosporium, Eutypella, Penicillium, Rhodotorula, Mucor, which create the ground for further research focused on the durability of cement paste based on secondary raw materials and their resistance against the predominant groups of microorganisms occurring in the objective location also by using extracts of several herbals as a prevention of microbial growth.