Companies and individuals have been making and trying out several “bioasphalts” since 2002. THe substituted materials for petroleums have included various cooking oil wastes, sugar, corn starch, and several other crops. Individuals who have made bioasphalt in their homes haves used it to fix their driveways. In terms of organizations researching this area, the University of Iowa has been very active and developed an asphalt made from corn-based bio-oil. The decision was made to pave part of a Des Moines bike trail with the mixture in 2010, but its too soon to know how the experimental asphalt will hold up.
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