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Purdue Researchers Work On Pothole-Resistant Concrete

A research center at Purdue University is developing concrete and asphalt mixtures that could reduce the amount of potholes in Indiana roads.

The cause of potholes is no secret to researchers. When moisture seeps into the soil under the pavement, it weakens the foundation. Traffic over these weak spots leads to cracking, which in turn lets in more moisture and exacerbates the problem.

The solution is to prevent moisture from entering the pavement. But that's easier said than done in a state like Indiana, which experiences rain, ice and snow throughout the year.

Rebecca McDaniel, technical director for the North Central Super Pave Center at Purdue University, says the state sees the most potholes during the spring because the roads deteriorate from the winter moisture.

The Super Pave Center works to develop new asphalt mixtures that let in as little moisture as possible.

"We now have better tools, better tests and better science, really, or engineering, that we can use to identify aggregates, which are the rocks in the mixture, and asphalt binder, which acts like glue," McDaniel says.

These elements need to be compatible so they can bind together.

The Super Pave Center will host a webinar on April 1 to share successful mixtures and techniques and warn about what doesn't work.

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