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Accession Number PB2013-111546
Title Performance Evaluation of Iowa Bridge Decks Constructed with Epoxy-Coated Reinforcing Bars.
Publication Date Apr 2011
Media Count 187p
Personal Author J. Wiss
Abstract Epoxy coatings have been used on the embedded reinforcing bars of bridge decks since the mid-1970s to mitigate deterioration caused by chloride-induced corrosion. The use of chloride-based deicers became common in the early 1960s and caused corrosion of conventional uncoated bars in bridge decks within 5 to 10 years of commencement of deicer applications. In response to this rapid deterioration, the National Bureau of Standards researched coatings to protect the reinforcement (National Bureau of Standards, 1975), resulting in the development of epoxy-coated reinforcing bars, which were used in bridge decks beginning in 1973. While corrosion-related deterioration has been prevalent on bridge decks with uncoated reinforcing bars in northern climates where the use of deicing salts is common, bridge decks constructed after 1973 with epoxy-coated reinforcing have shown good corrosion resistance with only limited exceptions. On the whole, previous laboratory and field studies regarding the performance of epoxy-coated reinforcing bars are very promising; however, some laboratory and field studies have yielded differing results.
Keywords Bridge decks
Chlorides
Coatings
Concrete structures
Corrosion prevention
Cracking(Fracturing)
Epoxy resins
Iowa
Rebar
Reinforcing steels


 
Source Agency Federal Highway Administration
NTIS Subject Category 50C - Construction Equipment, Materials, & Supplies
50A - Highway Engineering
71G - Corrosion & Corrosion Inhibition
71E - Coatings, Colorants, & Finishes
Corporate Author Wiss, Janney, Elstner and Associates, Northbrook, IL.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1325
Contract Number N/A

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