RAS Recycled Asphalt ShinglesRAS Recycled Asphalt Shingles

Recycled Asphalt Shingles (RAS)

RAS is one of the most challenging materials to produce cost effectively—unless you have the low wear costs and consistent uptime of Rotochopper asphalt shingle grinding technology.

b-66 shingles pileb-66 shingles pile

End Product Challenges

State and provincial DOTs typically specify a maximum particle size of 1/2" (12 mm) or 3/8” (11 mm) minus for RAS used in public road surfaces. Fine grinding an abrasive feedstock can quickly CAUSE significant wear and downtime —unless you have the controlled wear and simplified maintenance of Rotochopper shingle grinders.

Rotochopper B-66 with asphalt shingle packageRotochopper B-66 with asphalt shingle package

Particle Size and Binder Value

RAS requires a small particle size because the binding properties of asphalt cement are activated by heat within an asphalt plant. A small particle size allows the heat within an asphalt plant to effectively melt the asphalt cement in the RAS, thereby utilizing a higher percentage of the asphalt cement in the ground shingle material. Rotochopper grinding equipment maximizes the value of the asphalt cement by minimizing grinder operating and maintenance costs.

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“Throughout the planning phase, the Rotochopper staff worked with us to make sure we’d have the right size machine to keep our costs low and our production steady.”

—Jason Haus, Dem-Con Companies, LLC.