Effects of volume fraction and surface coating of textile yarns on the tensile performance of AR-glass textile reinforced concrete

This study investigates the effects of volume fraction and epoxy coating of textile yarns on the failure morphologies and tensile properties of alkali-resistant glass textile reinforced concrete (ARG-TRC). The quasi-static tensile tests were first carried out on the single yarn and fiber strips with different numbers of warp and weft yarns to evaluate the effect of the epoxy coating on their tensile performance. The ARG-TRC specimens with various volume fractions of warp yarn (0.24, 0.49, 0.73, and 1.09 vol%) and weft yarn (0, 0.20, 0.48, and 0.96 vol%) were subsequently tested, and their crack evolution and strain distribution were monitored and captured by the digital image correlation (DIC) method. It was found that the failure morphologies and tensile properties of ARG-TRC mainly depend on the volume fraction of warp yarn and the epoxy coating, while the effect of weft yarn is minimal. Furthermore, the effect of epoxy coating on the tensile properties of ARG-TRC is discussed with variations in the volume fraction of textile yarn. A simplified experimental fitting model is obtained by trilinear fitting and compared with the ACK theoretical model. The findings from this study can serve as a valuable reference for optimizing fabric configurations and designing TRC components. •The effects of textile yarn volume fractions and epoxy coating were investigated.•The crack and strain distributions were determined using DIC technique.•Epoxy resin coating enhances the tensile strength while increasing the brittleness.•The simplified tensile constitutive model parameters are obtained.