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ENVIRONMENTAL DURABILITY EVALUATION OF EXTERNALLY BONDED COMPOSITES

PACK, JULIENNE R.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046870996

Abstract Details

2003, MS, University of Cincinnati, Engineering : Civil Engineering.
The durability of three types of fiber reinforced polymers (CFRP plate, CFRP fabric, and GFRP fabric) used for strengthening concrete structures was evaluated. Both material and bond specimens were subjected to conditioning treatments that are likely to occur in civil infrastructure. Samples were exposed to 100% humidity, alkalinity, salt water, dry heat, freeze/thaw cycling, vehicle fuel, and UV radiation for various durations and then were tested and compared to baseline sample values to determine if deterioration took place at a material or bond level. The CFRP plate tensile specimens experienced an increase in strength from the benefits of a post-curing period while at the same time experienced a decrease in thickness. The decrease in thickness was most likely due to chemical degradation of the resin matrix, and/or as a result of post-curing. The CFRP fabric experienced a post-curing period for a much shorter duration than the plate. The bond specimens exposed to elevated temperatures, moisture, and chemical solutions suffered an apparent trend of deterioration along the bond line, which progressed into material failure for specimens exposed for longer durations. The GFRP fabric bond specimens followed a trend similar to the CFRP fabric specimens when exposed to moisture and chemical solutions. The rate of deterioration due to the chemical attack of alkalinity was much faster than the attack due to salt water. Reinforced concrete beams strengthened with the three materials were exposed to a combined treatment of freeze/thaw cycling and UV radiation and then tested in flexure and compared to the performance of non-conditioned strengthened beams. The GFRP fabric specimens were the only beams impacted by the conditioning. The treatment resulted in fiber surface pitting and, based on the observed failure modes, increased brittleness of the material.
Dr. Bahram M. Shahrooz (Advisor)
289 p.
Engineering, Civil
externally bonded FRPs; durability of FRPs; CFRP and GFRP bonded to concrete; creep Tg, ILSS, tensile properties; flexural response to conditioned FRPs

Recommended Citations

Citations

  • PACK, J. R. (2003). ENVIRONMENTAL DURABILITY EVALUATION OF EXTERNALLY BONDED COMPOSITES [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046870996

    APA Style (7th edition)

  • PACK, JULIENNE. ENVIRONMENTAL DURABILITY EVALUATION OF EXTERNALLY BONDED COMPOSITES. 2003. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046870996.

    MLA Style (8th edition)

  • PACK, JULIENNE. "ENVIRONMENTAL DURABILITY EVALUATION OF EXTERNALLY BONDED COMPOSITES." Master's thesis, University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1046870996

    Chicago Manual of Style (17th edition)

ucin1046870996
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© 2003, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.
Release 3.2.12