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Evaluation of thin epoxy system overlays for concrete bridge decks : final report.
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1991-12-01
[PDF-4.31 MB]
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Alternative Title:Evaluation of thin epoxy system overlays for concrete bridge decks.
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Abstract:Four overlay systems were applied to concrete bridge decks in north Louisiana in May 1995 to evaluate their performance as friction surface and also as concrete sealers. Dural Flexolith, Poly-Carb Flexogrid, and Con/Chem Con/Crete were placed on three separate bridge deck; sand and Dural epoxy were placed on the fourth deck. Friction numbers were measured with the British Portable Tester and the E-274 Skid Trailer. The sealing characteristics of each system were checked with electrical resistivity measurements.
A five-year evaluation determined that Dural Flexolith and basalt aggregate and Poly-Carb Flexogrid (broadcast systems) provided very good friction characteristics. They were also crack resistant and remained bonded to the concrete. The use of sand and Dural epoxy produced a less effective surface for skid resistance, but its use is more intended for low ADT applications. The mortar system (Con/ChemCono/Crete) produced low skid numbers initially but improved slightly over the evaluation period.
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