Asphalt Rubber Technology Information Center
© 2015 - Rubber Pavements Association (RPA). All rights reserved.
Accelerated Pavement Testing of Rutting Performance of Two Caltrans Overlay Strategies
This paper contains results of accelerated pavement tests at elevated temperatures on dense graded asphalt concrete and gap-graded asphalt rubber hot mix.  The
APT testing was performed using a Caltrans Heavy vehicle Simulators.  The overlays were placed on preciously untrafficked sections of an existing...
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Accelerated Pavement Testing Phase I: Field and Laboratory Evaluation of Dense-Graded Asphalt Concrete (DGAC) and
Asphalt-Rubber Hot Mix Grap-Graded (ARHM-GG) Executive Summary and Recommendations
This report describes the results of a pilot project performed for Caltrans to demonstrate the capabilities of the HVS system and underscore the potential benefit of an
APT technology transfer project involving the HVS.  The logistics of the pilot project were...
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An Overview of Caltrans Experience with Rubberized Asphalt Concrete
Caltrans has considerable experience with the use of rubber in dense graded asphalt concrete hot mix (DGAC).  This experience began in 1978 and has continued to
the present.  The experience to date has indicated that the use of rubber in asphalt concrete...
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Analytical Study of Minimization of Reflection Cracking in Asphalt Concrete Overlays by Use of a Rubber-Asphalt
Interlayer
A finite element analysis concluded that a low modulus interlayer such as asphalt-rubber can be significant in the inhibition of reflection cracking resulting from load and
temperature.  The study focused on crack tip stress and showed that crack width interlayer modulus and overlay...
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Asphalt Rubber Hot Mix-Gap Graded Thickness Determination Guide (Interim)
Design guide for determining the thickness of a gap graded asphalt rubber hot mix (ARHM-GG) based on the thickness of a conventional dense graded AC overlay
designed using Caltrans...
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Assessment of Warm Mix Technologies for Use with Asphalt Rubber Paving Applications
Warm mix asphalt (WMA) is the name given to certain technologies that reduce the production and placement temperatures of asphalt mixes.  Generally, the placement
temperatures should be between 185°F and 275°F for...
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Caltrans Experience With Asphalt-Rubber Concrete – An Overview and Future Direction
Caltrans has considerable experience with the use of rubber in dense graded asphalt concrete hot mix (DGAC).  This experience began in 1978 and has continued to
the present.  The experience to date has indicated that the most effective use of rubber...
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Caltrans Experience With Rubberized Asphalt Concrete
Caltrans has considerable experience with the use of rubber in dense graded asphalt concrete hot mix (DGAC).  This experience began in 1978 and has continued to
the present.  The experience to date has indicated that the use of rubber in asphalt...
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Caltrans Pavement Rehabilitation Using Rubberized Asphalt Concrete
Caltrans has considerable experience with the use of rubber in dense graded asphalt concrete hot mix (AC).  This experience began in 1978 and has continued to the
present.  The experience to date has indicated that the most effective use of rubber is in asphalt concrete...
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City of Thousand Oaks- Experience with Asphalt Rubber Hot Mix
The city of Thousand Oaks awarded its first contract for Gap Graded Asphalt Rubber Hot Mix for street maintenance overlays on May 28, 1991.  At that time it was the
largest municipal ARHM project ever awarded in California.  51,271 tons of ARHM were placed for a final contract...
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Development of a Physical Property Specification for Asphalt-Rubber Binder
The performance of projects incorporating asphalt-rubber binders has been inconsistent.  Thus, a method was needed to provide an understanding of binder physical
properties associated with the desirable performance and to quantify them for specification...
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Effectiveness of Rubberized Asphalt in Stopping Reflection Cracking of Asphalt Concrete (Interim Report)
A series of experimental rehabilitation techniques that include rubber-asphalt were constructed over an existing asphalt concrete pavement on Route 395 near
Ravendale, CA.  The experimental sections consisted of a dense graded...
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Environmental Noise Analysis - Alta Arden Expressway Resurfacing Project
The acoustical consulting firm of Brown-Buntin Associates, Inc. (BBA) was retained by the Sacramento County Department of Public Works to study Alta Arden
Expressway traffic noise levels before and after paving with rubberized asphalt.  The purpose of this study was to describe...
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Environmental Noise Analysis - Antelope Road Widening Project
The acoustical consulting firm of Brown-Buntin Associates, Inc. (BBA) was retained by the Sacramento County Department of Public Works to study Antelope Road
traffic noise levels before and after paving with rubberized...
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Environmental Noise Analysis - Rubberized vs. Conventional Asphalt Overlays   Alta Arden Expressway and Bond Road
In late 1994, Sacramento County retained BBA to perform three additional acoustical analyses of the effects of roadway repaving on traffic noise levels.  The first of
these analyses was a return to the Alta Arden Expressway to re-evaluate the noise reduction provided...
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Establishing the California Department of Transportation Accelerated Pavement Testing Program
This report is on how the California Department of Transportation Accelerated Pavement Testing (CAL/APT) Program was established.  Discussion includes history of
the program, search for full-scale pavement testing technology suitable to California, results of a pilot project conducted on test pavements built in...
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Evaluation of CalTrans Modified Binder (MB) Specification: Final Report
Caltrans has developed a modified binder (MB) specification for asphalt rubber binders.  The initial specification was developed through a laboratory and field
pavement performance study which included an evaluation of six field projects initially and reportedly validated...
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Evaluation of Coatings on Coastal Steel Bridges, 16-year Period
The California Division of Highways investigated a wide spectrum of coatings for the protection of steel from corrosion in an aggressive marine environment for 16 years
in the period 1952-1968.  Evaluation of test sections of two bridges to which the coatings were applied showed that the best system...
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Evaluation of Plus-Ride Installation at Susanville, California
An experimental project to study the effectiveness of various asphalt-rubber systems in reducing reflective cracking was constructed by Caltrans in the fall of 1983.  
Since the thickness of the various systems were...
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Field Aging Effects On The Fatigue Of Asphalt Concrete And Asphalt-Rubber Concrete
This paper describes a study to investigate the influence of field aging on the fatigue performance of asphalt concrete and asphalt-rubber concrete. Two California
mixes were investigated: 1) Conventional asphalt concrete...
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Flexible Pavement Rehabilitation Using Asphalt Rubber Combinations – A Progress Report
Several flexible pavement rehabilitation strategies incorporating asphalt-rubber were used experimentally on a project in northeastern California in the fall of 1983.  
Included were rubberized dense-graded asphalt concrete (AC) overlays containing binder then being marketed by the...
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