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Open AccessArticle

Antimicrobial Efficiency of Metallurgical Slags for Application in Building Materials and Products

1
Povazska Cement Plant Ladce, 018 63 Ladce, Slovakia
2
Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Košice, 042 00 Košice, Slovakia
3
Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, 812 37 Bratislava, Slovakia
*
Author to whom correspondence should be addressed.
Buildings 2018, 8(2), 33; https://doi.org/10.3390/buildings8020033
Received: 21 November 2017 / Revised: 2 February 2018 / Accepted: 9 February 2018 / Published: 17 February 2018
(This article belongs to the Special Issue Sustainable Building Materials)
The article deals with studying the antimicrobial efficiency of finely ground metallurgical slags, such as granulated blast-furnace slag with specific surface areas of 340 (1Sa) and 520 m2/kg (1Sb), air cooled blast-furnace slag (2S), demetallized steel slag (3S), calcareous ladle slag (4S), and copper slag (5S). The efficiency was tested on microbial representatives, such as: Gram-positive bacteria—Bacillus subtilis, Staphylococcus aureus, Micrococcus luteus; Gram-negative bacteria—Escherichia coli, Pseudomonas aeruginosa, Serratia marcescens; yeasts—Candida utilis, Rhodotorula glutinis; and microscopic filamentous fungi—Aspergillus niger, Penicillium funiculosum, Chaetomium globosum, Alternaria alternata, Trichoderma viride, Cladosporium herbarum. The efficiency was determined by dilution methods in agar growth media so that the resulting concentration of the tested slags was 10, 20, 40, and 60%. The antibacterial efficiency of the slags decreased in the order: S4 > S3 > S2 > S1a = S1b > S5, while their anti-yeast efficiency decreased in the order S4 > S1a = S1b = S3 > S2 > S5. Microscopic filamentous fungi were selectively sensitive to the slags; therefore, there is only an approximate order of efficiency of S4 > S3 = S1a = S1b > S5 > S2. Application of metallurgical slags into building materials and products provide them with increasing resistance against biodeterioration. View Full-Text
Keywords: metallurgical slags; antimicrobial efficiency; bacteria; yeasts; microscopic filamentous fungi; biodeterioration resistance metallurgical slags; antimicrobial efficiency; bacteria; yeasts; microscopic filamentous fungi; biodeterioration resistance
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Strigáč, J.; Števulová, N.; Mikušinec, J.; Varečka, L.; Hudecová, D. Antimicrobial Efficiency of Metallurgical Slags for Application in Building Materials and Products. Buildings 2018, 8, 33.

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