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Experimental study on behavior of normal strength concrete influenced by elevated temperatures
Concrete subject to elevated temperatures are directly affected by inner microstructure blending components. As a consequence, owing to high temperatures, the non-destructive test (Rebound Index) helps to evaluates the behavior of concrete. The paper focuses on behavior of normal strength concrete specimens exposed to high temperatures ranging from 200°C to 800°C with distinct cooling regimes (air cooled condition, hot condition) on M20, M30 and M40 concrete grades. It is observed that the compressive strength is approximately 9% lower in air-cooled condition than in hot condition for concrete subjected to 200 to 400°C temperature. Reduction of compressive strength correlates with reduction of concrete graph cube strength by rebound hammer in temperature range from 600°C to 800°C. The results revealed that, due to greater crack propagation at temperature range between 600 and 800°C, the higher percentage loss in strength for M40 grade concrete results in reduced rebound index values.
Experimental study on behavior of normal strength concrete influenced by elevated temperatures
Concrete subject to elevated temperatures are directly affected by inner microstructure blending components. As a consequence, owing to high temperatures, the non-destructive test (Rebound Index) helps to evaluates the behavior of concrete. The paper focuses on behavior of normal strength concrete specimens exposed to high temperatures ranging from 200°C to 800°C with distinct cooling regimes (air cooled condition, hot condition) on M20, M30 and M40 concrete grades. It is observed that the compressive strength is approximately 9% lower in air-cooled condition than in hot condition for concrete subjected to 200 to 400°C temperature. Reduction of compressive strength correlates with reduction of concrete graph cube strength by rebound hammer in temperature range from 600°C to 800°C. The results revealed that, due to greater crack propagation at temperature range between 600 and 800°C, the higher percentage loss in strength for M40 grade concrete results in reduced rebound index values.
Experimental study on behavior of normal strength concrete influenced by elevated temperatures
Kumavat, Hemraj (author) / Chandak, Narayan (author)
2020-02-01
125148 byte
Conference paper
Electronic Resource
English
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