Shear resistance of a polyurethane interface in concrete-steel composite beams

This thesis describes a series of pilot tests investigating the suitability of employing polyurethane to provide an adhesive shear connection between full depth precast concrete deck panels and steel girders in composite bridges. The study of an adhesive shear connection is the first step in developing a method of installing full depth precast concrete deck panels compatible with night closure concrete deck rehabilitation. The proposed connection detail also has the subsidiary benefit of increasing the structural strength and durability of precast concrete decks.; Polyurethane, because of its rapid curing profile and comparatively low material cost, was used to construct push-out test specimens with varying shear connection configurations. Static testing of these specimens was performed to determine whether joint behaviour conformed to limit states requirements. Test results consistently showed polyurethane failure at low stresses indicating a need to refine the chemical formulation and method of polyurethane application.