Asphalt Rubber Technology Information Center
© 2015 - Rubber Pavements Association (RPA). All rights reserved.
A Review of Crumb-Rubber Modified Asphalt Concrete Technology
This study presents an analysis of the characteristics of crumb-rubber modified asphalt pavements.  It is comprised of a state of the art literature review and laboratory
testing conducted with a Brookfield viscometer.  The reaction that occurs...
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Asphalt-Rubber Binder Stress Absorbing Membrane Interlayer
This is the final report of an evaluation of an Asphalt-Rubber Binder Stress Absorbing Membrane Interlayer (SAMI) to control transverse, alligator and longitudinal
cracking in the asphalt concrete...
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Asphalt-Rubber Open-Graded Friction Course
This report describes the construction of experimental asphalt-rubber and polymer-asphalt open-graded friction course overlays on Interstate 5 in Vancouver,
Washington.  A 1200-foot section of conventional open-graded pavement...
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Investigation of Exothermic Reaction in Tire Shred Fill Located on SR 100 in Ilwaco, Washington
Tire shreds and tire shred/soil mixtures have been used on highway projects as lightweight embankment fill, lightweight retaining wall backfill, drainage layers, thermal
insulation to limit frost penetration beneath roads, and replacement for soil or rock in other fill applications.  More than 70 successful projects...
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PlusRide and BoniFibers Pavement Evaluation: SR-530, Stanwood Vicinity
Asphalt mixes modified with the addition of reclaimed rubber granules (Plusride) and polyester fibers (bonifibers) were used in a 0.12-ft. overlay of a badly distressed
section of AC pavement.  The distress consisted of transverse and longitudinal cracking which was reflecting through from the underlying old PCC pavement and
severe alligator cracking which was an age...
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Plusride Asphalt Concrete Pavement
The performance of an experimental installation of PlusRide ACP as a bridge deck overlay is summarized in this report.  Visual inspections, friction tests, noise
readings, and rut depth measurements were taken on both the PlusRide and a rubberized ACP control section.  No evidence of better frictional...
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PlusRide Asphalt Pavement – SR 405, Contract 2768, S Curve/ Cedar River Bridge and RR Bridge
This is the post construction and one year evaluation Report of PlusRide being used as the wearing course on a bridge deck overlay under very high traffic volumes.  
A rubberized Class D Asphalt Concrete Pavement friction course was used on an adjacent bridge to compare...
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PlusRide Asphalt Pavement (Post-Construction Report)
PlusRide asphalt was used as an overlay on two ramps at the Auburn-Black Diamond Road Interchange.  The planned thickness was 0.10 ft. for both the off- and on-
ramps from SR 18.  A change was made during the contract to increase the depth to 0.15 ft. for the on-ramp...
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PlusRide Asphalt Pavement SR-82, Contract 2318 Bridge No.82/205 et al.
This is the final report of PlusRide being used as the wearing course on a bridge deck overlay.  A class D asphalt Concrete pavement, which is an open graded friction
course, was used on an adjacent bridge as a control for the PlusRide.  PlusRide claims were high friction resistance, reduced noise, and...
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Rubber Asphalt Binder “Stress Absorbing Membrane Interlayer”
Experimental installation of rubber-asphalt binder stress absorbing membrane interlayers were evaluated for their ability to delay or prevent reflective alligator cracking.  
The final results are inconclusive in that after 10 years of service life...
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Rubber Modified and PBA-6 Asphalt Binder Pavements – SR-5, Lewis County Line to SR-12
This report documents the construction of two experimental test sections of asphalt concrete pavement containing polymer and ground rubber additives.  The two
sections are located on I-5 south of Olympia, WA and were constructed in the summer of...
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Rubber Proportioning and Feed Equipment Modifications for CRM Asphalt Production
Presents the design of modifications to existing mix and feed equipment owned by EnviroTire for the introduction of CRM into an asphalt plant.  Equipment schematics
are presented performance evaluations and cost impacts are...
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Rubber-Asphalt Binder “Stress Absorbing Membrane Interlayer”
Final report on the four-year performance of an asphalt-rubber stress absorbing membrane interlayer (SAMI).  The SAMI on this particular project is doing an excellent
job of controlling reflection cracking from the underlying...
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Rubberized ACP Class “D” SR-520, Evergreen Point Bridge to SR-908
The construction and performance history are described for a rubberized open-graded pavement placed on SR-520 near Kirkland, WA.  The section has lasted longer
than the average conventional open-graded pavement, but it is not...
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SAMI and Heavy Duty Bituthene Reflection Crack Prevention Study
Final report on the performance of an asphalt rubber stress absorbing membrane interlayer (SAMI) placed directly over a portland cement concrete pavement and
overlaid with 0.15-ft. AC surface.  The SAMI section suffered...
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