2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 11: New and Advanced Materials, Technologies, and Manufacturing
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 174 pages |
| ISBN: | 978-1-989820-10-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Corrosion Behaviour of the Cement Composites with the Incorporated Waste Materials
Adriana Estokova1; Michaela Smolakova2; Alena Luptakova3;1INSTITUTE OF ENVIRONMENTAL ENGINEERING, Kosice, Slovakia; 2TECHNICAL UNIVERSITY OF KOSICE, Kosice, Slovakia; 3SLOVAK ACADEMY OF SCIENCES, Kosice, Slovakia;
Type of Paper: Regular
Id Paper: 108
Topic: 43
Abstract:
The durability of building materials is an important factor in extending their lifetime, which is one of the fundamental objectives for sustainable development in the construction industry. Although cement materials are considered to be relatively resistant, there are still a number of chemical, physical or biological agents that can disrupt their structure and even their functionality. In recent times, it has been a trend to use waste materials or by-products from other industries to manufacture composites. The use of such admixtures or cement replacement fulfills two objectives of sustainable development: reduction of huge amounts of waste which would most likely end up in the landfill, and secondly, it improves the parameters of the final cementitious composites, due to e.g. pozzolanic reactions.
This work deals with the study of resistance of cementitious composites with different proportions of selected waste like blast furnace slag in the range from 65 to 95% against sulphate bacterial corrosion. Long-term bacterial corrosion was simulated using the sulphur oxidising bacteria Acidithiobacilus. The resistance of samples exposed to bacteria has been studied by monitoring changes in compressive strength, porosity, absorbability, as well as leachability of the most important components of composites. SEM analysis was used to investigate surface changes and DSC / TG to study the content of hydrated products.
Findings revealed that the composite with the blast furnace slag provided a better performance in aggressive bacterial environment. It was confirmed, however, that no linear correlation exists between the amount of the slag and the lower degradation changes. The sample with the 75 % of slag admixture proved the best performance regarding the resistivity against sulphate bio-corrosion.
Keywords:
Sustainable development;References:
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