FUNGISTATIC PROPERTIES OF GRANULATED BLASTFURNACE SLAG AND RELATED SLAG-CONTAINING CEMENTS

The article deals with studying the antifungal effect of ground granulated blastfurnace slag (GGBS) and the cements made from it. Antifungal effects were tested on the fungi using the procedure given in the Czech national standard SN 72 4310: 1977 -Testing the mould proofness properties of building products and materials. A mixture of the fungi Aspergillus niger, Chaetomium globosum, Penicillium funiculosum, Paecilomyces variotii and Gliocladium virens was used for testing. The scale for evaluating mould proofness properties according to SN 72 4310: 1977 is from 0 to 5 in degree of fungi growth, where a value of 0 means that no growth of fungi occurs and the building products and materials possess fungistatic properties. The study confirms the fungistatic propeties of GGBS with mould proofness property 0. The addition of GGBS to cements from 65 wt. % to 95 wt. % ensures the achieving of a fungistatic environment, which enables the production of fungistatic blastfurnace cements CEM III/A 32,5 N (with GGBS content of 65 wt. %), CEM III/B 32,5 N and CEM III/C 32,5 N with mould proofness property 0. * L.O.I. -loss of ignition