Effect of fiber content on bending performance of glass fiber reinforced cement slab

Abstract

To investigate the effect of fiber content on the bending properties of oriented glass fiber reinforced cement (GRC), the four-point flexural test was used to get the fracture performance of oriented GRC slab, and a 3D numerical model is created by RFPA^3D simulation software.The failure modes of the GRC slab with different glass fiber content are compared.The load-displacement curve of the specimen is analyzed, and the strengthening and toughening effect of the fiber is investigated by fracture energy. The results show that the peak load of the specimens enhances with the increase of the oriented fiber within volume fraction of 0.5% and 2.0%. The specimen with added fibers still has a certain bearing capacity when cracks appear at the bottom, and the fibers are damaged but not broken. With the increase of fiber content, the crack propagation path becomes more tortuous, the more work is done when failure occurs, and the better the toughness is. The study can provide a reference for reinforcement of directional GRC.