Effect of exposure time and elevated temperature on plain concrete

• Main Authors: Alsadey, S., Omran, A., Jamal, Z.
• Format: Conference Proceeding
• Language: English
• Subjects: Compressive properties; Compressive strength; Concrete properties; High temperature effects; Mechanical properties; Physical properties; Temperature; Water-cement ratio
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0108215

Fires are always known for seriously deteriorating concrete in structures; the concrete material in structures is likely to be exposed to elevated temperatures during fires. The objective of this study is to determine the effect of different exposure temperatures and times on normal concrete. The research described in this paper was to evaluate the changes in the physical and mechanical properties of concrete exposed to the effect of high temperature. The same design formula was used for all the samples; water-cement ratio w/c=0.55, and the slump value=130 mm. Cylinders with a diameter of 100 mm and a height of 200 mm were used as concrete specimens, which were tested at the four elevated temperatures of 150, 300, 450, and 600°C for times 3 and 4 h. It was found from the experimental results that the temperature of exposure is the main contributor to the decrease in the weight and compressive strength of concrete and the exposure time has little effect. The predicted temperature distributions agree well with the experimental results. Finally, the compressive behaviors of concrete after high temperatures were established.