USE OF RHEOLOGICAL AND OTHER DATA IN ASPHALT ENGINEERING PROBLEMS

THE PERFORMANCE IN SERVICE OF ASPHALTS IN VARIOUS SYSTEMS DEPENDS BOTH ON THE INFLUENCE TO WHICH THE MATERIAL IS SUBJECTED AND THE INTRINSIC PROPERTIES OF THE ASPHALT ITSELF. A WIDE VARIETY OF ASPHALTS HAS BEEN INVESTIGATED WITH RESPECT TO (1) THEIR RHEOLOGICAL BEHAVIOR UNDER BOTH STATIC AND DYNAMIC LOAD, (2) THEIR BREAKING PROPERTIES, AND (3) OTHER PROPERTIES SUCH AS WATER PERMEABILITY, PHOTOCHEMICAL DECOMPOSITION, ETC. THE RHEOLOGICAL DATA ARE CONDENSED TO GENERALIZED CURVES OF BOTH THE DYNAMIC STORAGE AND LOSS MODULI VERSUS FREQUENCY, THE TEMPERATURE DEPENDENCE OF THESE CURVES, AND THE DEPENDENCE OF THE INITIAL VISCOSITY ON TEMPERATURE. BY THE USE OF THE SOFTENING POINT AND PENETRATION, IT IS SHOWN HOW, WITH THE AID OF THE STATED CURVES AND EMPIRICAL RELATIONSHIPS, TO FIND THE WHOLE RHEOLOGICAL BEHAVIOR OF AN ASPHALT. SEVERAL PROTOTYPE EXAMPLES OF ENGINEERING PROBLEMS ARE SOLVED, AND ARE EVIDENCE THAT ASPHALTS, NO LESS THAN METALS, CAN BE DEALT WITH AS ENGINEERING MATERIALS. A FLOW PROBLEM IS SOLVED WITH THE AID OF THE CURVES OF INITIAL VISCOSITY VERSUS TEMPERATURE. USE OF THE TWO RHEOLOGICAL MODULI IN SOLVING ENGINEERING PROBLEMS IS SHOWN FOR THE CASE OF THE ATTENUATION OF VIBRATIONS. ALSO THE METHOD OF EXTENDING CLASSICAL ELASTIC THEORY TO THESE VISCO-ELASTIC MATERIALS IS OUTLINED, WITH THE PARTICULAR CASE OF A BENDING BEAM GIVEN IN DETAIL. THE PROBLEM OF WHETHER THERMAL CHANGES WILL CAUSE CRACKING OF AN ASPHALT IS INVESTIGATED. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/192/192-001.pdf
• Supplemental Notes:
  • No 192, pp 1 - 19, 11 FIG, 5 TAB, 24 REF 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:
  • Brodnyan, John G
• Publication Date: 1958

Media Info

• Media Type: Digital/other
• Pagination: 19p
• Monograph Title: Rheological and Adhesion Characteristics of Asphalt
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 192
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphalt; Behavior; Decomposition; Dynamic loads; Elasticity (Mechanics); Fracture mechanics; Modulus of elasticity; Pendulum tests; Permeability; Photochemistry; Rheology; Softening point; Static loads; Temperature; Viscoelasticity; Viscosity; Water
• Old TRIS Terms: Elastic theory
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211337
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Sep 16 1994 12:00AM