Anchorage of Epoxy-Coated Rebar Using Chemical Adhesives
2018-09
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Anchorage of Epoxy-Coated Rebar Using Chemical Adhesives
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2018-09
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Post-installed reinforcement is used to connect a new concrete member to an existing concrete structure. Typically, uncoated rebar post-installed with a chemical adhesive is used in these applications, which may lead to corrosion. Departments of Transportation and local bridge owners have used and continue to use epoxy-coated rebar in post-installed applications due to its inherent corrosion resistance. Unfortunately, chemical adhesive manufacturers provide tensile strengths of their products for use with uncoated rebar and not epoxy-coated rebar. This work examined what effects the epoxy coating had on the tensile pullout strength and compared the results for epoxy-coated and uncoated rebar. Two slabs were constructed. One slab contained epoxy-coated rebar post-installed using four different chemical adhesive products and the other slab contained uncoated rebar post-installed using the same four different chemical adhesive products. Results indicated that the epoxy coating slightly reduced the tensile pullout strength of the post-installed rebar. The ratio of the tensile pullout strength of the epoxy-coated reinforcing bars to the tensile pullout strength of the uncoated reinforcing bars ranged from 0.94 to 1.05 and varied based on the chemical adhesive manufacturer. T-Test results indicated that differences in the tensile pullout strength for epoxy-coated rebar compared to uncoated rebar were statistically different when using three of the four chemical adhesives during installation.
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University of Minnesota M.S. thesis. September 2018. Major: Civil Engineering. Advisor: Ben Dymond. 1 computer file (PDF); viii, 154 pages.
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Mills, Connor. (2018). Anchorage of Epoxy-Coated Rebar Using Chemical Adhesives. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/202409.
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