About the research
In 2016, the Iowa Department of Transportation (DOT) plans to build a four-span bridge partially constructed with American Society of Testing and Materials (ASTM) A1010 bridge steel on County Road K-25 over I-29 in Woodbury County. A1010 steel is a relatively new to the market structural stainless steel. This steel is a nominal 12% chromium (10.5% minimum, 12.5% maximum) material that is reported to have enhanced corrosion resistance over that of traditional painted structural steels, weathering steels, and galvanized steels.
A1010 steel has been successfully used in environmentally aggressive applications such as coal rail cars and coal processing equipment (just to name a few). Although more expensive initially, it may be possible that bridges constructed using A1010 steel may have longer service lives and, therefore, lower overall lifecycle costs.
The general goal of this work is to evaluate the fundamental behavior of girders fabricated using A1010 steel, evaluate the potential for galvanic corrosion when various fastener types are used, and evaluate the in situ performance of the Woodbury County Bridge.