ommercial Asphalt Co. a Maple Grove, Minn.-based supplier of asphalt and asphalt products is one of the nation’s largest supply-only producers. Producing and distributing several million tons of hot mix asphalt annually, the company, a division of Tiller Corporation, has seen the role of recycled asphalt pavement (RAP) in its process grow from almost nothing in the mid to late 1970s to where it is today: an annual volume of several hundred thousa

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