Asphalt Rubber Technology Information Center
© 2016 - Rubber Pavements Association (RPA). All rights reserved.
1988 Report on Bridge Deck Waterproofing
In 1988, the Ministry of Transportation monitored the thickness of waterproofing membrane placed on bridges under its authority, as well as the quality of the membrane.
Membrane thickness is controlled by an end result specification (ERS)...
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20th WEDC Conference: Colombo, Sri Lanka, 1994 Rubber Recycling
This is a summary of WEDC Conference held in Sri Lanka... Read More

A Case Study: The Cost Effective Use of Bitumen-Rubber on Municipal Roads in Mbabane, Swaziland
This paper outlines the basis of the decision to use bitumen-rubber single surface treatment as a “holding action” until sufficient funds become available to perform the
recommended rehabilitation of severely deteriorated roads.  The surface treatments performed better...
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A Noise-Absorbing Road Surface made of Poroelastic Asphaltic Concrete
A new road-surface material, called poroelastic asphaltic concrete (PEAC), has been designed with a view to its acoustic properties.  The aim was to achieve the
greatest possible sound absorption in the frequency ranges...
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A Review of the Road Performance of A Modified Binder in Southern Africa Over A Six-Year Period
Arm-R-Shield bitumen-rubber was first introduced to South Africa in late 1982.  This concept was radical in respect of the type of product, its manufacture and the very
high application rates at which it was spray applied.  Technical as well as application data from the USA was based on empirical...
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A Review of the Road Performance of Bitumen-Rubber in South and Southern Africa
This paper will review the experience gained from the use of bitumen (asphalt)-rubber I South Africa and states in Southern Africa (Swaziland and Botswana) over a 5 -
7 year period.  The Arm-R-Shield of Arizona Refining of Phoenix, Arizona was first introduced to South Africa in October 1982, followed...
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A Revolution in Asphalt-Rubber Binders: Flexochape Storable Binder
The discovery of storable FLEXOCHAPE binder is particularly important for the development of asphalt rubber concrete (ARC).  They provide... Read More

An Innovative Process for On-Site Hot Recycling of Six-Year-Old Open-Graded Mixes
The A1 Autoroute connecting Paris with Northern Europe is one of the most heavily traffic roads carrying an average of 40,000 vehicles per day, 30% of which are
trucks.  In the early 1980’s, during rainy weather, truck traffic had become such a problem that the highway...
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Bitumen Rubber Asphalt (Dry Process)
This paper describes the “Dry” process of manufacturing Bitumen Rubber Asphalt, the process of laying the asphalt in the field, the tests required for designing and
controlling the mixes and general comments of advantages and field...
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Bitumen-Rubber ITS Introduction and Development in South Africa
The bitumen-rubber was brought to the attention of Sastech and Tosas in May 1981 during discussion with Arizona DOT in Phoenix, Arizona.  Confidential discussions
were held with Transvaal Roads Department and the Department of Land Transport. The object of these discussions...
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Central Lab Evaluation of Ecoflex Asphalt Cement
This report summarizes the results of the different stages of analysis to which a new product must be submitted in the context of a complete assessment.  Ecofles
asphalt samples were provided by Bitumar and were characterized by the current road binders tests, as well as by a preliminary, but more...
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Considerations in the Design of Overlay Pavement to Minimize Reflection Cracking
This paper presents the results of a study directed toward the solution of the reflection cracking problem in overlaid cracked pavements.  Stresses in the overlay
pavement near the existing crack are estimated using a recently developed finite element program for the pavement system...
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Cost Effectiveness of Rubber and Polymer Modified Asphalt Mixtures as Related to Sustainable Fatigue Performance
Load associated fatigue cracking is one of the major distress types occurring in flexible pavements. Flexural bending beam fatigue laboratory test has been used for
several decades and is considered an integral part of the Superpave advanced characterization procedure. One of the most   
... Read More

Development of New Products and Technologies: A European Contractor’s Experience
Surface Dressings are executed using two main families of binder.  For decades, road research laboratories have tried to develop a binder which would combine the
advantages of both families.  In 1979, we initiated a comprehensive research program that extended over 3 years, involving tests carried...
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Development of Rubber and Asphalt Binders by Depolymerization and Devulcanization of Scrap Tires in Asphalt
Scrap tires in three forms - the crumb rubber 60 minus mesh, crumb rubber 20 minus mesh, and buffed rubber were subjected to depolymerization/ devulcanization by
applying heat, high shear and the combination of both.  Different reaction temperatures and times of reaction were applied.  The reaction...
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Do Road Surfaces with Rubber Give Noise Reductions?
The paper contends that porosity of the surface is responsible for noise reduction and that rubber (dry process) does not directly contribute to noise reduction.  
Reference is made to a new pavement, “poroelastic surface,” under...
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Effects of Stress Absorbing Membrane Interlayers
This paper will deal with the effect of stress absorbing membrane interlayers for the reduction of reflection cracking... Read More

Evaluation of High and Low Temperature Properties of Heavy Trafficked Asphalt Road Pavements in Poland
Four heavy-duty pavements were chosen for tests including methods developed at Strategic Research Program.  Pavements chosen were constructed by various
contractors with application of various materials.  Plain asphalt cement and binders modified with...
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Evaluation of Reflective Cracking Resistance in Bituminous Mixtures
Bituminous overlays are currently the most prevalent method used to retard the reappearance of cracks in the pavement surface.  Even though the usual distress mode
in overlays is reflective cracking, the design of these overlays typically does not take this particular distress mechanism...
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Evaluation of Rubber Modified Asphalt Demonstration Projects
Eleven Ontario Demonstration projects (wet and dry processes) were evaluated in terms of pavement performance, environmental impacts, life cycle costs and
recyclability.  Conclusions are included on performance where the dry process should produce performance equivalent to conventional hot...
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Experimental Hot Mix Pavements with Scrap Tire Rubber at Thamesville, Ontario (Report 1 and 2)
The purpose of the demonstration was to confirm that (a) the construction of asphalt rubber hot mix pavements is environmentally acceptable and complies with worker
health and safety regulations; (b) asphalt rubber pavements can be recycled in both the plant...
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