Adding bio-oil to asphalt leads to demonstration project for CCEE’s Williams

Christopher WilliamsAssociate Professor Christopher Williams was just trying to see if adding bio-oil to asphalt would improve the hot- and cold-weather performance of pavements. What he found was a possible green replacement for asphalt derived from petroleum.

That finding will move from Williams’ laboratory at the Institute for Transportation’s Asphalt Materials and Pavements Program at Iowa State to a demonstration project this fall. The project will pave part of a Des Moines bicycle trail with an asphalt mixture containing what is now known as Bioasphalt.

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