Evaluation of Biocorrosion of Cement Mortars with Blast Furnace Slag by Thermal Analysis

Authors

  • A. Eštoková Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Košice, Košice, Slovakia
  • M. Smoláková Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Košice, Košice, Slovakia
  • A. Luptáková Institute of Geotechnics, Slovak Academy of Science, Košice, Slovakia
  • H. Vojtková Faculty of Mining and Geology, VSB-Technical University in Ostrava, Ostrava, Czech Republic

Keywords:

cement composites, blast furnace slag, biological corrosion, hydration degree, portlandite, thermal analysis

Abstract

Composite samples made with Portland cement and with various portions of blast furnace slag, exposed to aggressive bacterial medium for 12 months, were investigated. Based on the knowledge that calcium hydroxide is the least stable product of cement hydration, thermal analysis was utilized in order to identify the leaching characteristic of vital calcium hydroxide from the composite matrix. The results, expressed in the terms of hydration degree and the amount of free portlandite in studied samples, showed a positive impact of the addition of granulated blast furnace slag. This study confirms that thermal analysis is a useful and appropriate tool for studying degradation changes of the cement-based composites with pozzolanic materials.

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Published

2020-05-15

How to Cite

Eštoková, A., Smoláková, M., Luptáková, A., & Vojtková, H. (2020). Evaluation of Biocorrosion of Cement Mortars with Blast Furnace Slag by Thermal Analysis. Chemické Listy, 114(5), 355–360. Retrieved from http://w.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/3604

Issue

Vol. 114 No. 5 (2020)

Section

Articles

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