Evaluation of the Use of Geosynthetic Systems in the Improvement of Reinforced Concrete Beams at Elevated Temperature

Abstract

This project evaluates the use of geosynthetic systems to improve the performance of reinforced concrete beams subjected to elevated temperatures. As concrete remains a fundamental material in construction, its vulnerability to thermal degradation poses significant risks, particularly in fire scenarios and extreme environmental conditions. This study aims to investigate how incorporating geosynthetic materials can enhance the mechanical properties and durability of reinforced concrete structures under high-temperature exposure.

The research employed experimental methods, including compressive and flexural strength tests on concrete samples with and without geosynthetic reinforcement. Specimens were subjected to temperatures of 300°C and 600°C to assess their performance. The results demonstrated that geosynthetic reinforcement significantly improved both compressive strength (Sample C vs A, 31.2 N/mm² vs 29.8 N/mm²) and flexural strength (Sample C vs A, 35.56 N/mm² vs 33.33 N/mm²) at room temperature (25°C). Notably, geosynthetic reinforcement significantly reduced the percentage loss of compressive strength after thermal exposure. Plain concrete beam (A to B) showed a 20.4% decline, while geotextile reinforced sample (C to D) showed only a 9.6% decline in compressive strength, an indication of better thermal protection.

Results demonstrated that geosynthetic reinforcements significantly mitigated the loss of compressive and flexural strength due to thermal exposure, while also enhancing ductility and delaying crack propagation. The findings underscore the potential of geosynthetic systems to optimize the design and safety of reinforced concrete structures in high-temperature environments.