Asphalt Rubber Technology Information Center
© 2015 - Rubber Pavements Association (RPA). All rights reserved.
A Concept of Preengineered, Prefabricated, Prestressed Modular and Multimodular Sealing Systems for Modern Bridges
and Structures
Single module, modular, and multimodular sealing systems appear to offer long-term, maintenance-free solutions to newly developing problems at bridge joints being
brought about by new design sophistication.  The need for armored joints and their damping effect together with improved...
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A Laboratory Evaluation on the Effects of Ground Tire Rubber on Strength Performance of Concrete
This research provides a laboratory evaluation of the effects of adding ground tire rubber on the performance of concrete.  The underlying objective of this
investigation is to assess the possibility of partially substituting the fine aggregate with ground tire rubber particles...
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A National Overview - The Use of Discarded Materials and By-Products in Hot Mix Asphalt Concrete Pavements
The objective of this paper was to research and investigate the potential specific disposal of waste materials by usage in Hot Mix Asphalt Concrete (HMAC) pavements.  
The particular purpose of this effort was to establish the current nationwide position of all of the fifty...
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A Study of the Use of Recycled Paving Material: Report to Congress, June 1993
The highway construction industry has a long history of using recycled products for highway construction.  This report summarizes some of the industries’ experiences
and, where sufficient information exists, it provides...
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Aggregate and Paved Design and Rehabilitation Manual for Low-Volume Roads
The considerations and constraints associated with the design process are discussed.  These include drainage, geometrics, traffic, materials, surface characteristics,
and shoulders.  Design procedures especially for low-volume roads are given for both paved and aggregate...
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An Economic Evaluation of Technical Systems for Scrap Tire Recycling
A technological and economic assessment is made of alternative technologies to recover the waste rubber in scrap vehicle tires.  The principal technical alternatives
evaluated are ground scrap rubber as an asphalt additive, retreading, energy recovery, and carbon black...
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An Evaluation of Effects of Deicing Additives on Properties of Asphalt Mixtures
This paper summarizes the results of an experimental study to evaluate the effects of two deicing additives, Verglimit and PlusRide, on the properties of asphalt mixtures
in terms of their resistance to rutting, low temperature cracking and moisture damage.  Verglimit consists mainly of calcium chloride and a small...
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An Investigation of Field and Laboratory-Compacted Asphalt-Rubber, SMA, Recycled and Conventional Asphalt-Concrete
Mixes Using SHRP Project A-003A Equipment
The report considers the effect of laboratory compaction procedures on simulation of field compaction using permanent deformation as the criteria of effectiveness of
the several procedures.  Laboratory compaction procedures included Texas gyratory, (SHRP gyratory device was available...
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Annual Progress Report Information and Evaluation of Crumb Rubber Modifier
This annual report has been prepared to summarize the activities conducted under the National Cooperative Highway Research Program Project 20-7, Task 58 on
“information and Evaluation of Crumb Rubber Modifier Technology” for the calendar year of...
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Applications of Carbonous Residue Recovered From Co-Retorting Tires with Waste Oils in Highway Construction
A two-step thermal process was developed to co-recycle scrap tires with waste oils to produce a soft particulate carbonous residue.  This solid carbonous residue has
applications as a modifier for bituminous binders and Portland concrete.  Addition of carbonous residue to bituminous...
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Asphalt-Rubber Open-Graded Friction Courses Volume 8
The purpose of this research was to evaluate the effectiveness of using asphalt-rubber binders in open-graded friction courses.  This research provides a sound basis
for using asphalt rubber binders in order to provide a more durable, cost-effective open-graded friction course.  The information...
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Background: EPA’s Dilemma Under Section 1038
Presents the EPA’s proposed approach in conducting studies as required by Sec. 1038 of ISTEA.  Sec. 1038 is interpreted not to require a “definitive scientific
determination of the significance of the health and environmental risks posed by recycling waste tires into...
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Biological Monitoring Assessment of Road Paving Workers Exposed to Asphalt and Crumb Rubber Modified Asphalt
The first objective of the present proposal is to determine if biological monitoring can add significantly to environmental sampling for CRM-asphalt-specific exposures.  
The specific aims associated with this objective are...
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Bridge Expansion Joint Sealants
Bridge joint seals placed in the field have been inspected and their effectiveness evaluated.  Of the materials tested, seals of polyurethane seals, if properly installed,
will effectively seal joints having up to ½ in. of movement.  Poor construction practices account for a number...
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Briefing for Honorable James W. Garner on Department of Highways and Transportation Use of Rubber Asphalt Seals
Saskatchewan Roadbuilders made a request of the Minister for a re-evaluation of the Rubber Asphalt Seal Program.  The following points... Read More

Characterization of CRM Binder Using SHRP Technology
The objective of the NCAT crumb rubber study was to evaluate the use of crumb rubber modified binders for use in HMA pavements... Read More

Comparison of Carbon Black from Pyrolized Tires to Other Fillers as Asphalt Rheology Modifiers
In order to dispose of old tires, crumb rubber-modified asphalts have been introduced.  However, the research done on these products shows that they don’t
necessarily enhance the field applications.  Since carbon black can be extracted from old tires, it might be better way to recycle tires.  This paper...
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Comparison of Mix Design Methods for Asphalt-Rubber Concrete Mixtures Volume 4
The use of conventional mix design methods for determining the optimum asphalt content for rubber mixtures... Read More

Construction Guidelines for Crumb Rubber Modified Hot Mix Asphalt - Interim Report
In recent years there has been increased interest in the use of crumb rubber modified hot mix asphalt pavements.  This report presents the current technology for the
construction of CRM HMA pavements.  The major component of CRM is scrap tire rubber.  The agency currently...
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CPAR – Asphalt Rubber Research Study
This report consists of lab tests completed since San Francisco project meeting (6/20/90).  Includes binder tests, accelerated aging, and... Read More
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