Experimental investigation of static and dynamic compressive behavior of carbon fiber reinforced concrete at elevated temperatures

Abstract

This study investigates the static and dynamic compressive performance of carbon fiber reinforced concrete (CFRC) from 200 °C to 800 °C, enhancing the understanding of its behavior under coupled conditions of elevated temperatures and impact loading. The effects of strain rate, temperature, fiber volume fraction, and matrix strength on the mechanical properties of CFRC were systematically analyzed using a split Hopkinson pressure bar (SHPB). Results indicate that strain rate has a pronounced strengthening effect on dynamic properties. While carbon fibers have a limited impact on compressive strength, they significantly reduce specimen damage under high temperatures and dynamic loading.