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Title |
Effects of Overuse of Admixtures and Aggregate Fines, and Low-temperature Curing on the Compressive Strength, Water Absorption, and Rebar Bond Strength of Concrete
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Authors |
김유진(Yu Jin Kim) ; 김태훈(Taehoon Kim) ; 김형기(Hyeong-Ki Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2024.36.5.399 |
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Keywords |
압축강도; 흡수율; 부착강도; 저품질; 손상 compressive strength; water absorption; bond strength; poor-quality; deterioration |
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Abstract |
A series of experimental evaluations was conducted to assess the extent of performance degradation in concrete resulting from various factors. These factors encompassed excessive use of mineral admixtures and air-entraining agents, an abundance of fines in the aggregate, exposure to low temperatures, and initial frost damage. The reduction in strength observed in both concrete and mortar, attributed to all factors except mineral admixtures, remained consistent regardless of the water?binder ratio. Concrete affected by most of these factors failed to reach the strength levels of the standard mix, even after 56 days of curing. Furthermore, the water absorption of hardened mortar was measured to elucidate its correlation with strength, indicating its potential as a quality estimation indicator. Additionally, concrete subjected to various factors demonstrated compromised rebar bond strength.
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