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Study on Influence of Fire on Concrete and Augmentation of Concrete's Fire Resistance Capability

Subhash Chandra, Er. Vikas Kumar

Abstract


Concrete serves as a fundamental material in constructing a range of infrastructures, including buildings, bridges, cooling towers, chimneys, and industrial structures. Among potential hazards, fire poses a significant threat to the integrity of these structures over time. The extent of damage incurred is contingent upon the severity and duration of the fire exposure. The impact of fire on concrete and its embedded reinforcement steel is influenced by factors like temperature and exposure duration. To assess the damage caused by fire to concrete, evaluations often commence with visual inspections, followed by ultrasonic pulse velocity measurements and testing of core samples. This study presents a systematic approach to evaluating concrete cubes within a laboratory setting using meticulously prepared samples. A series of cube samples, subjected to varying fire temperatures, were examined under two conditions: 1. M20 Grade design mix normal concrete cubes, and 2. M20 grade design mix containing carbonated aggregate. Assessment of the cube samples subsequent to exposure to different temperatures was conducted through compressive testing, followed by load testing.

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References


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