Recovery and Reuse of Asphalt Roofing Waste: Incorporation of Roofing Waste in Asphalt Paving. Volume 1. Analysis

摘要

A prior DOE study on ten candidate methods for recovering the energy resource represented in asphalt roofing waste showed that incorporating this waste in asphalt paving was a potentially viable commercial means for recovering a large portion of the annual 7 x 10 sup 13 Btu's in this waste resource. Laboratory tests were designed to investigate this potential and study such variables as waste preparation and amount of roofing waste which might be added to asphalt paving. These laboratory studies reported in Volume II of this report showed that paving mixes can be prepared using hammer milled, worn-out shingles up to about 18 1/2% by weight (30% by volume). The laboratory tests, limited to field waste, showed that the source of waste, size of waste and amount of waste will influence the test response of paving mixes. Preliminary economic projections were made based on the laboratory test results. Adding roofing waste to asphalt paving should prove to be a financially viable means for recovering the energy resource in asphalt roofing waste. Pavement mix cost reductions in the range of 5% to 20% were estimated for the ranges of waste addition tested. (ERA citation 11:056324)