Concrete is a common construction material for many Iowa bridges. The use of conventional concrete in bridge components, however, requires periodic maintenance and repair to address damage caused by heavy traffic loads, weather, and chloride deicers. But closing bridges to repair or replace damaged concrete creates hardships for drivers across the state.
Ultra-high performance concrete (UHPC) has the potential to significantly reduce these issues. UHPC is much stronger and more durable than conventional concrete, meaning repairs are needed less often. But due to its proprietary nature, UHPC has historically been cost-prohibitive for many bridge applications.
A recent Iowa DOT research project could change that. Researchers at Iowa State University developed a set of nonproprietary UHPC mixtures using readily accessible—and more affordable—materials. Testing indicated that the nonproprietary mixtures’ strength and durability were comparable to proprietary mixtures and at one-third of the cost, offering a promising alternative for Iowa bridge structures.
Learn more about this project in Iowa DOT’s new research brief and the investigators’ final report and technical brief.
Delivering targeted solutions for Iowa's transportation future.
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