When chemist John Warner heard about the problem of old asphalt not being reused, he wanted to find a solution. 

When asphalt (made up of gravel and other materials held together by thick petroleum) is exposed to elements and used for roads, it has to be repaved periodically. This costs money and requires maintenance. Yet, only small fragments of this material can be used. Warner decided, with his colleagues at Warner Babcock Institute for Green Chemistry, to create a “special, non toxic molecule called Delta S that reverses oxidation by pulling off old petroleum from pics of stone aggregate, then binding the whole substance together.” 

This molecule could make a huge difference in the pavement, concrete building, and construction industry allowing for 50 percent of the asphalt to be reused with the same lifespan and performance of brand new asphalt. 

To learn more about Delta S and the research behind it, click below. 

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