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Pavement Recycling Catching On

by Eugene E. Dallaire, Assoc. Editor; Civil Engineering Magazine, New York, NY 10017,


Serial Information: Civil Engineering—ASCE, 1980, Vol. 50, Issue 11, Pg. 45-49


Document Type: Feature article

Abstract:

Sparked by rising prices of asphalt, aggregates, energy, and construction labor, and plagued by a decline in the real dollars available for highway and road maintenance, many highway departments across the U.S. are beginning to turn to the recycling of existing asphaltic concrete pavements in their struggle to reduce costs. In Wisconsin, the leader in recycling, over 50% of road refurbishing jobs are now using hot-mix recycling, a process that yields a recycled pavement that appears as good as a brand new pavement. Still others are looking beyond hot-mix recycling to in-place cold-mix recycling. Here, it would be merely a matter of breaking up the pavement right on the roadway, pulverizing it into small pieces, adding ambient-temperature asphalt emulsions or asphalt-reconditioning agents, mixing it up in a traveling pug mill, then laying the recycled pavement down. Some believe such cold-mix pavements will find extensive use on secondary roads, with the more costly and energy-intensive hot-mix recycling used for main highways where a stronger pavement is needed.

Subject Headings: Recycling | Asphalt pavements | Highways and roads | Pavements | Infrastructure construction | Concrete pavements | Asphalt concrete

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