This report investigates the performance of bridge decks reinforced with stainless steel clad (SSC) and micro-composite multistructural formable steel (MMFX) rebars. The two-span Galloway Road Bridge on route CR5218 over North Elkhorn Creek in Scott County, KY, was reinforced with SSC rebars in one span and MMFX rebars in the second span. The reinforcements are intended to prolong the service life of the newly constructed bridge decks due to the expected corrosion-resistance capability. Moment-curvature analyses indicated that MMFX RC decks had 57% and 85% higher strengths than SSC RC decks in positive and negative moment regions, respectively. The areas under the moment-curvature curves, a ductility indicator, of the MMFX RC decks, however, were 5% and 14% less than that of SSC RC decks in similar regions. Field performance of the bridge decks was monitored beginning in August 2001, following its completion in July 2001. Field evaluation consists of locating and measuring crack formation. As of September 2005, the cracks in the deck were not measurable since the maximum observed crack width was less than the smallest unit (e.g. 1/100 in.) on the crack comparator. This is also less than the maximum crack width (0.013 in.) allowed by the AASHTO Standard for exterior exposure.

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The contents of this report reflect the views of the authors, who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky, the Kentucky Transportation Cabinet, nor the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Manufacturer or trade names are included for identification purposes only and are not to be considered an endorsement.