LABORATORY EVALUATION OF RHEOLOGICAL BEHAVIOR OF AN ASPHALT CONCRETE CONTAINING AN SBR ELASTOMETER

The subject of this paper is the influence of synthetic rubber (an elastomer styrene-butadiene rubber (SBR)) on the rheological behavior of asphalt concrete. The viscoelastic functions of a wearing course asphalt concrete with and without rubber have been evaluated with unconfined tensile creep tests and tensile-compressive stress dynamic tests at various frequencies and temperatures. The tests were carried out with an electrohydraulic system. The results obtained in the creep tests were perfectly comparable to those obtained in the dynamic tests, confirming the validity of the linear visco-elastic approach. The addition of rubber to concrete increases stiffness at high temperatures, long stress times (in creep tests), and low frequencies (in dynamic tests). Moreover, a general improvement in the elastic characteristics is found when phase angle between stress and deformation is reduced. Rubber contribution to asphalt concrete has also been evaluated in terms of fatigue behavior in a series of tests carried out in the laboratory under different loads.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1974/515/515-009.pdf
• Record URL:
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Mechanical Properties of Bituminous Paving Mixtures. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Verga, C
  • Battiato, G
  • La Bella, C
• Conference:
  • 53rd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1974-1-21 to 1974-1-25
• Publication Date: 1974

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 105-113
• Monograph Title: Characteristics of and factors influencing bituminous materials and mixtures
• Serial:
  • Transportation Research Record
  • Issue Number: 515
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt concrete; Creep tests; Deformation; Dynamic tests; Elastomers; Electromagnetic frequencies; Laboratory tests; Mechanical fatigue; Pavement wearing course; Rheological properties; Stiffness; Synthetic rubber; Temperature; Tension; Tension tests; Viscoelasticity
• Uncontrolled Terms: Tensile stress
• Old TRIS Terms: Tensile test
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00095572
• Record Type: Publication
• ISBN: 0309023599
• Report/Paper Numbers: #517
• Files: TRIS, TRB
• Created Date: Jul 2 1975 12:00AM