Effect of steel fiber on biaxial flexural property of textile reinforced concrete with basalt fiber mesh in slab test

Abstract

In order to investigate the influence of steel fibers on the biaxial bending properties of basalt fiber textile reinforced concrete, two-way slab test in accordance with EFNARC was introduced. The biaxial flexural properties of the basalt fiber textile reinforced concrete slab, the steel fiber reinforced concrete slab and the combined use of steel fiber and basalt fiber textile reinforced slab were compared. The slab without any reinforcement and the conventional steel mesh reinforced concrete slab were also studied as reference. The biaxial reinforcement of the basalt fiber mesh was analyzed and the feasibility of using steel fiber and basalt fiber mesh to replace the conventional steel mesh was studied. The results show that the inner force redistribution and the ultimate load of the slab increase obviously with the addition of the basalt fiber mesh, but the failure pattern of the slab still demonstrate brittle feature. The combined use of steel fiber and basalt fiber mesh illustrates positive hybrid effect, the toughness of the slab increases significantly. In the serviceability stage, the flexural properties of the slab reinforced with 30 kg/m3 steel fiber and basalt fiber mesh are higher than the conventional steel mesh reinforced slab, it means that the conventional steel mesh can be replaced by the combined use of the steel fiber and the basalt fiber mesh.