Research of the magnesia cement stability to the impact of corrosive biological environments

Abstract

Constructional materials with low bio stability are the reasons for the growth of microorganisms, what in its turn can cause the rise of epidemics. The article deals with bio stability of building mixes based on various types of mineral cementing materials: magnesia cement, cement and gypsum. The research was conducted by the method of maintaining the sample materials contaminated with spores of mold fungi, under optimal conditions, with the following evaluation of the fungal resistance of the coating. The results described show, that the gypsum samples have the least fungal resistance. The samples of the cement have different levels of resistance to the growth of mold fungi depending on the type of bio destructor. The magnesia cement samples possess the greatest resistance to contamination with fungal media and prevent their spreading. As a result, the higher concentration of used activator is, the stronger fungal resistance of magnesia cement. There is an assumption about interrelation between the fungal resistance and the phase composition of the magnesia stone.