Empirical investigation of temperature effects on the mechanical properties of glass textile reinforced concrete

Abstract

Textile Reinforced Concrete (TRC) is an innovative composite material that combines fine-grained concrete with textile fibers, resulting in improved mechanical properties for building materials. This research focuses on the impact of elevated temperatures on the mechanical characteristics of Glass TRC. Specifically, it investigates the tensile strength and bonding between glass rovings and fine-grained concrete. The study includes pullout tests on bonding TRC specimens and uniaxial tensile tests on tensile specimens exposed to temperatures of 30°C, 80°C, 150°C, and 200°C. The experimental results reveal that at 30 °C, the fiberglass mesh exhibits strong adhesion to fine-grained concrete, with an average bonding strength of 23.2 N/mm and an anchor length of approximately 120 mm. However, as the temperature increased to 150 °C and 200 °C, the bonding strength decreased by 33.4% and 46.2%, respectively. The tensile strength of TRC was 1470 MPa at 30 °C, but it decreased by 21.9% and 30.4% at temperatures of 150ºC and 200ºC.