Metabolic Activity of Micromycetes Affecting Urban Concrete Constructions

Table 1

Alteration of strength characteristics of concrete during 28 days of exposure in Czapek Dox medium without inoculation (CDM) and inoculated by spores of Aspergillus fumigatus A2 and Penicillium brevicompactum P4.

Concrete specimens	Characteristics of concrete strengths, MPa
	Compressive strength,				Bending strength,
	Initial	CDM	A2	P4	Initial	CDM	A2	P4
М400	6.60	6.55	6.50	6.48	32.30	32.25	32.15	32.14
М500	7.10	7.05	7.00	7.00	42.80	42.75	42.65	42.60
М 600	9.50	9.45	9.40	9.40	60.80	60.72	60.70	60.69
М 800	10.50	10.49	10.40	10.42	74.80	74.80	74.70	74.65
М 1000	12.20	12.17	12.15	12.15	95.20	95.16	95.00	95.05