ISOTROPY AND AN ASPHALTIC CONCRETE

ASPHALTIC CONCRETE CORE SPECIMENS WERE SECURED FROM A CONTRACT-CONSTRUCTED PAVEMENT IN 3 ORTHOGONAL DIRECTIONS. THESE CORE SPECIMENS WERE TESTED IN UNCONFINED COMPRESSION TO DETERMINE THE COMPLEX MODULI AT DIFFERENT TEMPERATURES AND FREQUENCIES. COMPARISONS OF THE DIRECTIONAL MODULI INDICATED THAT THE MATERIAL WAS ISOTROPIC IN COMPRESSION TO A FIRST APPROXIMATION AT THE PHENOMENOLOGICAL LEVEL. BLOCK SAMPLES OF THE ASPHALTIC CONCRETE WERE TAKEN AND SAWED TO PRODUCE TRAPEZOIDAL SPECIMENS FOR TESTING IN BENDING TO DETERMINE COMPLEX MODULI. THE RESULTS OF THESE TESTS INDICATED THAT THE LINEAR RANGE IN BENDING WAS SUBSTANTIALLY RESTRICTED IN COMPARISON TO AXIAL COMPRESSIVE TESTS. THE RESULTS OF TESTS OUTSIDE THE LINEAR RANGE ARE PRESENTED. COMPARISONS INDICATED THAT LINEAR COMPLEX MODULI IN BENDING AND COMPRESSION WERE THE SAME AND IT WAS CONCLUDED THAT THIS ASPHALTIC CONCRETE WAS ISOTROPIC TO A FIRST APPROXIMATION AT THE PHENOMENOLOGICAL LEVEL. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1970/329/329-005.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Flexible Pavement Design. 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:
  • Coffman, Bonner S
  • Ilves, George
  • Edwards, William F
• Publication Date: 1970

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 65-76
• Monograph Title: Design and performance of rigid and flexible pavements
• Serial:
  • Highway Research Record
  • Issue Number: 329
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphalt concrete; Bend tests; Bending; Bituminous pavements; Compression; Core samples; Isotropy; Modulus; Properties of materials
• Old TRIS Terms: Cores
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211571
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 25 1971 12:00AM