Protective Performance of Externally-Bonded, Nano-Modified FRP for Concrete

Externally bonded fiber-reinforced polymer (FRP) is a promising tool to use for either preserving the integrity of new concrete infrastructure or mitigating the deteriorations of aged concrete infrastructure. In cold climates, state and local roadway agencies are increasingly relying on the use of chloride salts for snow and ice control, which subject concrete bridge decks, piers, etc. to the combined action of freeze/thaw (F/T) cycling and possible chemical attack. In warm climates near coastal line, the concrete infrastructure is subjected to the ingress of chlorides from the marine environment and the FRP used to protect the concrete is subjected to the combined action of W/D cycling, thermal aging and ultraviolet (UV) aging. Due to its outstanding adhesive characteristics, epoxy resin is the most commonly used polymer for the externally bonded FRP, but without modification the hardened epoxy is generally vulnerable to the attack by moisture and UV. In this context, the overarching goal of this project is to investigate the protective performance of externally-bonded, nano-modified FRP for concrete in chloride environments, with the focus on resistance to F/T cycles and chloride-based deicers, W/D cycles and UV exposure, respectively. To achieve this goal, this study aims to: (1) investigate the influences of modifying an epoxy resin with nanomaterials (montmorillonite nanoclay, graphene oxide, or nanosilica) and UV-resistant polymer (polyester, aliphatic polyurethane, or polymethyl-methacrylate), individually or in combination, on the mechanical properties and durability performance of FRP/concrete composites under simulated cold or warm climates; (2) both before and after exposure tests, characterize the physical microstructure and chemical composition of the resin and the FRP/concrete interface, as well as their transport properties; and (3) elucidate the role of nano-materials and polyester on the improved resistance against various deterioration distresses, at the micron and nanometer scales.

Language

  • English

Project

  • Status: Active
  • Funding: $180,856
  • Contract Numbers:

    69A3551947137

  • Sponsor Organizations:

    Transportation Infrastructure Durability & Life Extension

    Washington State University
    Civil & Environmental Engineering
    Pullman, Washington  United States  99164

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    Transportation Infrastructure Durability & Life Extension

    Washington State University
    Civil & Environmental Engineering
    Pullman, Washington  United States  99164
  • Project Managers:

    Kline, Robin

  • Performing Organizations:

    Washington State University, Pullman

    Civil & Environmental Engineering Department
    PO Box 642910
    Pullman, WA  United States  99164-2910
  • Principal Investigators:

    Shi, Xianming

  • Start Date: 20220501
  • Expected Completion Date: 20230930
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers Program
  • Subprogram: Transportation Infrastructure Durability & Life Etension

Subject/Index Terms

Filing Info

  • Accession Number: 01857297
  • Record Type: Research project
  • Source Agency: National Center for Transportation Infrastructure Durability and Life-Extension
  • Contract Numbers: 69A3551947137
  • Files: UTC, RIP
  • Created Date: Sep 9 2022 5:51PM