The Second Time Around: Recycled Materials Need Analysis, Characterization

Better Roads, September 2012
Road Science
By Tom Kuennen, Contributing Editor

There is no stopping the growth of recycled and reclaimed materials in pavements.  The use of reclaimed asphalt pavement (RAP), reclaimed asphalt shingles (RAS), recycled concrete aggregate (RCA), and recycled granulated tire rubber (GTR) in pavement mixes and structures is growing dramatically as states accept them more and more in their specs.

But because RAP, RCA, RAS and GTR come from a variety of sources, they must be physio-chemically characterized prior to use in mixes.

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