ORIGINAL RESEARCH
Analyzing the Relationship between Chemical and Biological-Based Degradation of Concrete with Sulfate-Resisting Cement
 
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1
Institute of Environmental Engineering, Department of Material Engineering, Technical University of Kosice, Faculty of Civil Engineering, Kosice, Slovakia
2
Institute of Environmental Engineering, Department of Environmental Engineering, Technical University of Kosice, Faculty of Civil Engineering, Kosice, Slovakia
3
Institute of Geotechnics, Slovak Academy of Sciences, Kosice, Slovakia
Online publish date: 2019-01-02
Submission date: 2018-03-19
Final revision date: 2018-05-09
Acceptance date: 2018-05-15
 
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ABSTRACT:
External sulfate attack is detected on concrete construction exposed to soils, groundwater, seawater, or wastewater, and leads to serious damage to concrete elements. This paper describes an investigation of acidic corrosion caused by artificial sulphuric acid and biogenic sulphuric acid. The concrete prisms prepared from concrete-containing sulfate-resisting cement were exposed to an acid environment of different origin over a period of 3 months. The concentration of basic chemical elements such as calcium, silicon, iron, and aluminium were measured in liquid phases. Correlation analysis was used to evaluate dependencies and trends of leached-out amounts in these concentrations. Based on correlation coefficient, the intensity of dependency of the leaching trend was determined. A higher aggressiveness of sulfuric acid produced by sulfur-oxidizing bacteria was confirmed in terms of main concrete components’ leaching.
CORRESPONDING AUTHOR:
Vlasta Ondrejka Harbulakova   
Technical University od Kosice, Vysokoskolska 4, 04200 Kosice, Slovak Republic
eISSN:2083-5906
ISSN:1230-1485