▎ 摘　　要

NOVELTY - The ultra high performance nano concrete girder attains higher tensile strength, compressive strength, bonding capacity between intermolecular arrangements changed by graphene and nano-silica, higher young's modulus and ductility, wear resistance, shock resistance and corrosion resistance. The girder requires lesser transfer length to transfer the prestressing force. USE - Ultra high performance prestressed nano-concrete girder for construction of precast bridge. ADVANTAGE - The high performance prestressed nano-concrete girder has high compressive strength, tensile strength, and overall modulus of elasticity. The girder provides a link between the deck system and supporting piers, thus helping in the overall load transfer. The silicate in the form of nano-silica gives the improved chemical reaction between cementitious materials and enhances the compressive and tensile strengths of concrete mix proportion. The optimum dose of graphene and nano silica in the concrete mix design maximizes the performance of girder at ultra-high level. DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of the half scale prestressed nano concrete girder.