Antimicrobial Efficiency of Selected Wastes and By- Products for Building Applications

Volume 3 - Issue 3

Július Strigáč¹*, Jozef Mikušinec¹ and Nadežda Števulová²

Received: February 18, 2019;   Published: April 24, 2019

DOI: 10.32474/TCEIA.2018.03.000162

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Abstract

Article deals firstly with studying antimicrobial efficiency of ground metallurgical slags: granulated blast-furnace slag, aircooled blast-furnace slag, demetallized steel slag, calcareous ladle slag and copper slag. The efficiency was tested on microbial representatives: G+ and G- bacteria; yeasts; fungi. The efficiency was determined by dilution methods in agar growth media with resulting slag concentrations of 10, 20, 40 and 60%. The results gained by testing the antimicrobial efficiency of individual slag samples on selected representatives of biodeteriogenic microflora can be summarized as follows: the tested slag samples are characterized by selective toxicity on the model bacteria, yeasts, and microscopic filamentous fungi. Calcareous ladle slag possesses the highest antimicrobial efficiency, while granulated blast-furnace slag and demetallized steel slag have medium activity. Air cooled blast-furnace slag has still lower activity and copper slag has the lowest activity. Secondly, antifungal effects of fluidized bed combustion fly and bottom ash, pulverized fly ash, carbide lime slurry, commercial lime and granulated blast-furnace slag as well as cements made from it were tested on fungi according to technical standard ČSN 72 4310. The study confirms fungistatic properties of all samples as well as Blastfurnace cements containing the granulated blast-furnace slag additions from 65wt.% to 95wt.%, with exception of pulverized fly ash and Blastfurnace cements containing the granulated blast-furnace slag additions lower than 65wt.%, which have no fungistatic properties.

Keywords: Metallurgical slags; Antimicrobial efficiency; Mould-proof properties; Fungistatic properties; Fluidized bed combustion fly and bottom ash; Pulverized coal combustion fly ash; Carbide lime slurry; Fungistatic cements

Abstract| Introduction| Materials and Methods| Methods| Results| Conclusion| References|