Experimental Study on Static and Dynamic Compressive Behaviors of Carbon Fiber Reinforced Concrete Under High Temperatures

Abstract

This study investigates the response of Carbon Fiber Reinforced Concrete (CFRC) to elevated temperatures and high strain rates, conditions relevant to fire and explosion scenarios. CFRC specimens with varying carbon fiber content (0%, 1%, 2%) in C40 and C60 matrix strengths were tested using Split Hopkinson Pressure Bar (SHPB) and heating furnace, ranging from 200°C to 800°C. Quasi-static tests were also conducted for comparative analysis. Results show significant improvements in dynamic compressive strength, peak strain, and pre-peak stress toughness of CFRC under dynamic loading conditions. Failure patterns were minimized around 400°C. The findings highlight the superior impact resistance of CFRC in comparison to conventional concrete, emphasizing its potential to reduce structural damage caused by severe thermal and mechanical loads. This research underscores the effectiveness of carbon fibers in preserving the structural integrity and load-bearing capacity of CFRC in high-temperature and high-strain-rate environments, essential for applications in both accidental and intentional blast scenarios.

Keywords: carbon fiber reinforced concrete, Split Hopkinson Pressure Bar (SHPB), dynamic compressive properties, High temperatures, dynamic increase factor (DIF)