Alkaline resistance of glass fiber meshes and its effect on biaxial flexural behavior of concrete slabs

In order to investigate the biaxial flexural properties of glass fiber meshes in concrete slabs and the reinforcing effects of hybrid use of steel fiber and fiber mesh, the alkali resistance test and two-way slab bending test were carried out. The possible replacement of conventional steel mesh by composed use of glass fiber mesh and steel fibers has been investigated. The results show that the corrosion resistance of the alkali-resistant glass fiber is better than that of the C-glass fiber. Ultimate load of concrete slabs can be improved 59% with addition of alkali-resistant glass fiber mesh. Hybrid use of steel fiber and glass fiber mesh shows significant positive synthetic effect, and ultimate load and toughness of concrete slabs can be improved significantly, and failure mode of the concrete slabs changes from brittle pattern into a ductile one. The conventional steel mesh with constructive steel ratio (0.2%) can be replaced by the hybrid use of alkali-resistant glass fiber mesh and steel fibers with fiber content of 30 kg/m³.