Recycling of Pavement Materials in the 1990's

Pavement recycling is a necessity due to the diminishing supply of available construction materials and increasing regulations concerning the disposal of removed concrete and asphalt pavements. Since the 1950's and 60's recycling has grown to include hot and cold mix asphalt recycling, the use of crushed asphalt pavement as an aggregate base, and the use of Portland Cement concrete as an aggregate base, concrete
aggregate, and bituminous aggregate. Crack and seating and rubblizing of concrete pavement are also common forms of recycling in Minnesota.

The Minnesota Local Road Research Board (LRRB) requested that a report be written to provide information regarding the common methods of recycling, and to determine the status of recycling in Minnesota. This report outlines the recycling methods listed above, and gives specifications and mix designs for their use in Minnesota.