Abstract
Insulated concrete sandwich wall panel systems proposed in this paper were reinforced with glass-fiber-reinforced polymer (GFRP) grids as continuous shear connectors. This continuous shear grid connecting inner/outer concrete wythes is advantageous to induce mechanical bond between concrete and insulation. Three different surface roughness was adopted to investigate the effect of mechanical bonding on flexural strength of extruded polystyrene-insulated concrete sandwich wall panels. An experimental programme is organised to conduct full-scale bending tests with three groups of original surface, mechanically roughened surface and traction-free surface of extruded polystyrne (XPS) foams. The load–deflection behaviour was investigated at different number of shear grids in terms of strength, stiffness and deformation capacity. Mechanical bond dependence on the flexural strength could be quantified at different surface treatment and should be considered in design of continuous shear grids for insulated concrete sandwich wall panel systems.
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