Vacuum assisted resin transfer molding (VARTM) for external strengthening of structures

N. Uddin, S. Cauthen, L. Ramos and U.K. Vaidya,     The University of Alabama at Birmingham, USA


High-quality and expedient repair methods are necessary to address concrete deterioration that can occur in bridge structures. Most infrastructure-related applications of fiber-reinforced plastics (FRPs) use hand layup methods. Hand layup is tedious, labor-intensive and results are sensitive to personnel skill level. An alternative method of FRP application is vacuum assisted resin transfer molding (VARTM). VARTM uses single-sided molding technology to infuse resin over fabrics wrapping large structures, such as bridge girders and columns. There ...

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