Development of cost-effective VARTM technology for repair and hardening design method and specifications for ALDOT contractor : phase 3.

Details

• Creators:
  Uddin, Nasim ; Ramos, Luis ; Vaidya, Uday
• Corporate Creators:
  University of Alabama. Department of Civil and Environmental Engineering ; University of Alabama. Dept. of Materials Science and Engineering
• Subject/TRT Terms:
  Alternatives Analysis Cost Effectiveness Durability Fiber Reinforced Polymers Flexural Strength Reinforced Concrete Repairing Resins Surface Preparation Vacuum
• Publication/ Report Number:
  ALDOT Report 930-607B
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alabama
• Corporate Publisher:
  Alabama. Department of Transportation
• Abstract:
  Resin infusion, a method of fabricating fiber reinforced polymer (FRP), has been shown to produce a stronger FRP of
  
  more consistent quality than other methods. It is a preferred method of fabrication in industries like automotive,
  
  aerospace, and boat building. In infrastructure, however, FRP is commonly applied by the hand layup method. Hand
  
  layup produces FRP of questionable quality. Vacuum Assisted Resin Transfer Molding (VARTM), a form of resin
  
  infusion, can be used to apply externally bonded FRP to infrastructure to increase structural capacity. Based on
  
  experience and knowledge in other industries, VARTM is expected to produce a better FRP than that currently used
  
  in infrastructure. This report aims to facilitate the transfer of a proven technology for the benefit of this industry.
  
  This report highlights VARTM’s benefits compared to hand layup for infrastructure applications. Shear and flexural
  
  strength and strain are tested and compared to verify the assumption that VARTM can produce a better FRP. FRP
  
  durability is one of the main areas where further research is needed for externally bonded FRP. This report does a
  
  thorough analysis of the performance of both VARTM and hand layup FRP durability. Temperature and humidity
  
  have been identified as the principal drivers of environmental degradation. Accelerated conditioning protocols
  
  (ACP) for both temperature extremes are applied.
  
  Having analyzed VARTM FRP strength and durability, this research will also test a modification to improve the
  
  VARTM application process on concrete structures. Grooves sawed into concrete are believed to be able to
  
  accelerate the VARTM application time without diminishing the capacity of the final product. Both of these
  
  assumptions are tested and verified. Having proven VARTM performance and having found a way to improve the
  
  original application process, it is hoped that this research has facilitated the implementation of VARTM FRP.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:4870c6db77da015891e5feb4a8a79bfb74bf5ab39945b1ef6ab108607acc47115f08c23d39dc4b51faa8f17ada2ba2c76a77626205e2e04bd45ad290577b714e
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28052/dot_28052_DS1.pdf
• File Type:
  [PDF - 5.60 MB ]