from the Frying-Tonight dept.
'The asphalt used in roads has traditionally been made from aggregate small particles of rock and products made from crude oil. When crude oil is refined, it produces a variety of products including light fuels like gasoline, heavier plastics and also dense asphalt. But the price of asphalt made from crude oil is pretty high, about $700 to $800 per ton', Wen said. 'That really adds up. One lane of a highway, paved for one mile, costs about $1 million. Now you know where your taxes go !'
One alternative to traditional asphalt that Wen and the people in his lab are looking into is bioasphalt. Instead of using petroleum, waste cooking oil is processed into asphalt.