In-plane debond response of vacuum assisted resin transfer molded carbon fiber sheets on concrete substrates

Academic Article

Abstract

  • High quality and expedient processing repair methods are necessary for enhancing the service life of bridge structures. Deterioration of concrete can occur as a result of structural cracks, corrosion of reinforcement and freeze-thaw cycles. Cost effective methods with potential for field implementation are necessary to address the issue of repair and vulnerability to bridge structures. Most infrastructure related applications of fiber-reinforced plastics (FRPs) use traditional hand lay-up technology. The hand lay-up is tedious, expensive, labor-intensive and prone to personnel skill level. An alternative to traditional hand lay-up of FRP for infrastructure applications 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, spans and columns. There is no past research available to understand the interface developed when VARTM processing is adopted to wrap fibers such as carbon and/or glass over concrete structures. A weak interface creates potential problems such as water seepage, fiber wrinkling, premature failure of the beam caused by debonding at the interface and moisture induced delamination. This paper is aimed at understanding the interface formed by carbon fiber processed on to a concrete surface using the VARTM technique. Various surface treatments of the concrete, including sandblasting, were performed. Carbon fiber wrap Sikadur HEX 103C and low viscosity epoxy resin Sikadur 300 were considered in VARTM processing of concrete specimens.
  • Author List

  • Uddin N; Shohel M; Vaidya UK; Serrano-Perez JC
  • Start Page

  • 3
  • End Page

  • 10
  • Volume

  • 37
  • Issue

  • 2