Paper Contents
Abstract
In this study, we investigated the impact of temperature levels and duration on the mechanical behavior of concrete, focusing on fire safety measures for structural members. We produced concrete mixes of M-35 and M-45 grade and prepared 48 cubes (100x100x100 mm) and 48 cylinders (150mm diameter and 300mm height). These specimens were cured for 28 days and subsequently dried at room temperature. After one day in the laboratory, they were exposed to temperatures of 300, 500, and 800C for durations of 1 and 3 hours. We then determined various mechanical properties, including compressive strength, split tensile strength, loss in mass, rebound number, and ultrasonic pulse velocity.Our findings indicate that exposure to high temperatures resulted in a reduction in both compressive and split tensile strength of the specimens. Additionally, we observed an increase in crack width with rising temperature. These outcomes highlight the negative effects of elevated temperatures on the mechanical properties of concrete.To summarize, our study emphasizes the significance of incorporating appropriate fire safety measures in structural design. By understanding the influence of temperature on concrete strength and behavior, we can better develop strategies to enhance the fire resistance of structural elements.
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Copyright © 2023 ANU UPADHYAY. This is an open access article distributed under the Creative Commons Attribution License.
