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Title |
Effects of Physical Sulfate Erosion on Concrete
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Authors |
이정배(Jeong-Bae Lee) ; 최현덕(Hyun-Deuk Choi) |
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DOI |
https://doi.org/10.4334/JKCI.2024.36.5.475 |
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Keywords |
콘크리트 화학적 황산염 침식; 콘크리트 물리적 황산염 침식; 세나다이트; 미라빌라이트 chemical sulfate corrosion on concrete; physical sulfate corrosion on concrete; thenardite; mirabilite |
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Abstract |
The durability and structural stability of concrete structures are crucial in the construction industry. However, performance degradation due to environmental factors such as sulfate attack can pose significant challenges. Sulfate attack is divided into chemical corrosion, which causes expansion and cracking due to the formation of ettringite and gypsum, and physical corrosion, which involves the growth of salt crystals. These processes shorten the lifespan of concrete and threaten structural safety. We investigated concrete’s resistance to sulfate attack by adjusting the water?binder ratio and the proportion of mineral admixtures. Experiments confirmed that a lower water?binder ratio increases resistance to sulfate attack. These results provide a basis for developing new concrete mix designs to enhance durability. Additionally, using appropriate mineral admixtures and additional protective measures such as surface coatings can further protect concrete from sulfate attack. This research offers important findings that can contribute to extending the lifespan and enhancing the safety of concrete structures. It highlights the importance of exploring new approaches to mitigate sulfate attack and improve concrete durability through innovative mix designs and protective strategies.
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