[This article belongs to Volume - 39, Issue - 01]

Full scale test for repair cracks in prestressed hollow core concrete slab with different methods

One of the most common defects observed in prestressed hollow core concrete slabs is cracking. Large cracks can develop in concrete structures as a result of differential settlement of the support when installing the precast slab or overloading. It is necessary to rehabilitate or reinforce distressed elements in order to recover their structural capacity. The literature mentions a variety of methods for strengthening and rehabilitation the various structural components of prestressed hollow core concrete slabs. This study looks into the rehabilitation of a one-way prestressed hollow-core concrete slab that underwent several methods of repair. Three distinct methods are employed to fix crack concrete slabs: carbon-fiber-reinforced polymers come in two varieties: sheets and laminates, and epoxy injection. The material used was a full-scale, hollow-core concrete slab measuring (6000mm x 1200mm x200 mm). The Distributed load applied to the slabs allowed for the prediction of each slab specimen's structural response, including failure modes and deflection. An analysis was conducted on the effectiveness of various strengthening and repair methods and how they affected the structural behavior of a prestressed hollow-core concrete slab That contains cracks. It has been observed that the type of repair techniques used in this research affects the bearing capacity of the prestressed hollow-core concrete slab and leads to a redistribution of concrete and strand stresses. It has been discovered that all repair methods can strengthen or rehabilitation the structural integrity of concrete slabs with cracks.