NON-NEWTONIAN BEHAVIOR OF ASPHALT CEMENTS

THE NON-NEWTONIAN BEHAVIOR OF ASPHALT CEMENTS IS STUDIED BY APPLICATION OF MICRORHEOLOGICAL AND REACTION KINETIC PRINCIPLES. THIS INVESTIGATION INCLUDES BOTH THEORETICAL AND EXPERIMENTAL EVALUATION OF ANOMALOUS FLOW CHARACTERISTICS OF ASPHALTS THROUGH MEASUREMENTS OF VISCOSITY, COMPLEX FLOW, AND THIXOTROPY. THE THEORIES RELATED TO THE EFFECT OF INTERNAL STRUCTURE ON THE NON-NEWTONIAN BEHAVIOR OF ASPHALTS IS REVIEWED AND THE SHEAR DEPENDENCE OF VISCOSITY IS DISCUSSED. THE EFFECT OF THE FLOW OF MACROMOLECULAR UNITS AS DISTINGUISHED FROM THE FLOW OF A SINGLE MOLECULE ON THE OBSERVED NON-NEWTONIAN BEHAVIOR IS EMPHASIZED. IT IS INDICATED THAT THE DEGRADATION OF THESE FLOW UNITS IS THE CONTROLLING FACTOR IN THE ANOMALOUS FLOW CHARACTERISTICS. THE THEORETICAL ANALYSIS OF THE STRUCTURAL CHANGES OCCURRING IN THE MATERIAL AS A RESULT OF APPLICATION OF SHEAR STRESS IS PRESENTED. THE NEWTONIAN AND NON-NEWTONIAN BEHAVIORS WHICH ARE RELATED TO THESE STRUCTURAL CHANGES ARE STUDIED BY APPLICATION OF A REACTION KINETIC PRINCIPLE. THE UTILIZATION OF THIS PRINCIPLE YIELDS AN EQUILIBRIUM CONSTANT FOR THE REACTION BETWEEN THE BROKEN AND UNBROKEN PORTIONS OF THE INTERNAL STRUCTURE. TO CONIRM THE ABOVE THEORIES, EXPERIMENTS WERE CONDUCTED ON VARIOUS TYPES OF ASPHALT CEMENTS BY UTILIZATION OF A SLIDING PLATE MICROVISCOMETER. THE RHEOLOGICAL DATA WERE COLLECTED AT VARIOUS TEMPERATURES RANGING FROM 60 DEGREES F. TO 122 DEGREES F. /AUTHOR/

• Corporate Authors:

  Association of Asphalt Paving Technologists (AAPT)

  400 Selby Avenue, Suite I
  St Paul, MN  United States  55102
• Authors:
  • Majidzadeh, K
  • Schweyer, H E
• Conference:
  • Association of Asphalt Paving Technologists Proceedings
• Publication Date: 1965

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 20-44
• Serial:
  • Volume: 34

Subject/Index Terms

• TRT Terms: Asphalt cement; Behavior; Constants; Equilibrium (Mechanics); Evaluation; Experiments; Flow; Kinetics; Materials; Measurement; Microscopy; Motor reactions; Nonnewtonian flow; Rheology; Shear stress; Structural analysis; Structural mechanics; Studies; Temperature; Theory; Thixotropy; Viscometers; Viscosity
• Uncontrolled Terms: Characteristics; Structural behavior
• Old TRIS Terms: Complex flow; Macromolecular units; Microviscometer; Non-newtonian; Reaction kinetics; Rheological studies
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00210317
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 1 2003 12:00AM