Bio-Corrosion Resistance of Concretes Containing Antimicrobial Ground Granulated Blastfurnace Slag BIOLANOVA and Novel Hybrid H-CEMENT

• DOI: 10.4028/www.scientific.net/ssp.244.57
• Publication Date: 2015-10-29T08:54:29Z
• Authors: Július Strigáč; Pavel Martauz; Adriana Eštoková; Nadežda Števulová; Alena Luptáková
• Keywords: Mass concentration (chemistry); Acidithiobacillus thiooxidans; Slag (welding)

The article deals with the study of biocorrosion concretes by sulphuric acid induced oxidizing bacteria Acidithiobacillus thiooxidans . were prepared from reference cement CEM I 42,5 N, mixtures N and antimicrobial ground granulated blastfurnace slag BIOLANOVA (GGBS) (with amount GGBS 65 mass % - III/A 32,5 75 III/B 85 III/C a 95 N) novel hybrid H-CEMENT (HC). experiments carried out in model laboratory conditions at 30 °C during 91 days. degree deterioration concrete samples has been studied on base pH changes leachate, concentrations selected ions such as S, Ca Si changes. It clearly confirmed, that presence bacteria, pronounced degradation occurred exception HC sample, which behaviour proved differences to other samples. possessed more alkali leachate comparison others. concentration sulphur S was increased metabolic activity due biogenic H 2 SO 4 formation. increase acidified so promoted leaching next substances silicon well. development similar all composite case concrete, however smallest portion leached determined concrete. increasing being added III concretes. different tendency also observed regards measured decrease found out. results confirmed resistance containing sulphate attack sample showed highest biocorrosion.