JOURNAL OF FACULTY OF CIVIL ENGINEERING 48, 2025.god., str. 5-18
CONCRETE CORROSION ON A PRIMARY SETTLING TANK| |
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| DOI: 10.14415/JFCE-913 |
| UDK: 620.193:691.32 |
| CC-BY-SA 4.0 license |
| Autor : Vajsz, Viktória; Lepsényi, Ákos; Horvat, Zoltan |
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| | This research paper explores the issue of concrete corrosion in sewage treatment plants, highlighting the detrimental effects of aggressive chemicals and high humidity on reinforced concrete structures. The study outlines the corrosion mechanisms, emphasizing the role of sulfuric acid formation from decomposing sewage, which significantly lowers the pH and accelerates concrete erosion. Key factors influencing corrosion include the compactness of concrete, its alkalinity, and the thickness of the protective cover over the steel reinforcements. The paper also investigates the impact of various corrosive agents found in wastewater, including biogenic nitric acid and sulfates, which contribute to the breakdown of concrete integrity. A case study conducted at a sewage treatment plant in Nyíregyháza reveals significant deterioration in a primary settling tank, with visual inspections and nondestructive testing indicating carbonation and corrosion of the concrete structure. The findings underscore the importance of using corrosion-resistant concrete mixes and protective coatings to extend the lifespan of such structures. Recommendations for future construction emphasize adopting modern standards, including lower water-cement ratios and sulfate-resistant materials, to mitigate the effects of corrosive environments. Overall, this research highlights the critical need for proactive measures in designing and maintaining concrete structures in wastewater treatment settings. |
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| | Ključne reči: |
| | concrete corrosion, wastewater, structural integrity, testing, protective coatings |
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