Paper for CBC 2010 – Performance of Bridge Decks Containing Epoxy-Coated Bars

Epoxy-coated reinforcing bars have been used in the U.S. for over 35 years and according to the National Bridge Inventory are now in over 65,000 bridge structures, covering over 775,000,000 sq ft of deck. This paper presents research that outlines field and plant quality control for these products, showing that such issues have been addressed by the industry and in Standard Specifications. The paper addresses concern that was expressed in the 1980’s regarding the long-term durability of epoxy-coated bars in marine structures and shows that these issues appear to be related to poor manufacturing and handling of the bars prior to placement into concrete and the use of poor quality concrete. Examples of good performance are presented, even in samples exposed to high chloride levels. It was concluded that epoxy coated bars have been widely and successfully used to reduce deterioration of concrete structures for over 35 years.