Going Green with Sustainable Asphalt RAP, Recycling, Energy and the Carbon Footprint. Greening the Blacktop. Overview. Why Asphalt is sustainable Perpetual Pavements Carbon Footprint RAP & Recycling Warm Mix Asphalt Porous Asphalt Energy & Emission Reductions. Why
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RAP, Recycling, Energy and the Carbon Footprint
Greening the Blacktop
Asphalt is Sustainable
40-75 mm STONE MATRIX ASPHALT, OGFC or Superpave
Rut Resistant Material
(Varies As Needed)
Flexible Fatigue Resistant
Material 75 - 100 mm
Max Tensile Strain
Mill Surface – Use for RAP
High Quality Stone Matrix, OGFC or Superpave
50 - 100 mm
Structure Remains Intact
The total amount of greenhouse gases produced to directly and indirectly support human activities, usually expressed in equivalent tons of (CO2)
Doesn’t segregate GHGs
Over the past two years, MoDOT has allowed contractors to put used shingles that have been removed from rooftops into their asphalt mix. The result is a very durable, more-rut resistant asphalt at a much lower price.
The use of recycled shingles saves $3 to $5 per ton of asphalt. That may not sound like much at first, but consider this: a typical resurfacing project would use about 30,000 tons of asphalt, for a savings of $90,000 to $150,000.
Crumb rubber (from tires)
Open-Graded HMA/WMA ~ 2 ½”
½” Agg. (#57) ~ 1” – 2” Thick
Clean Uniformly Graded 2”-3”
Crushed Agg. (#2) – 40% Voids
1997 Report: “Twenty years later, a long time for one paving job on that busy parking lot, it still looks good and works well.”
The sooner the better!
Colas Group Data
Cover the Aggregate
RAP + Porous+ Warm Mix + Perpetual Pavements =