In 2019, Missouri engineers added used cooking oil to old road asphalt; they tested mixes with 60% to 100% reclaimed material in lab tests

At the University of Missouri, innovative researchers are exploring the potential of repurposing waste cooking oil in asphalt blends. Their experiments revealed that while oil enhances low-temperature performance, it can sometimes reduce resistance to rutting. The findings suggest an optimal oil concentration tailored for various climatic conditions to ensure effective pavement performance. Ongoing investigations are required to fully grasp the advantages of utilizing high-recycled asphalt surfaces.
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