FRACTURE (ULTIMATE STRENGTH) ANALYSIS OF ASPHALT PAVEMENT LAYERS RESULTING FROM TRAFFIC LOADING

THIS PAPER PRESENTS ANALYSES OF FRACTURES OCCURRING IN ASPHALT PAVEMENT STRUCTURES DUE TO EXCESSIV SINGLE-WHEEL LOADS AND TO BRAKING TRACTIONS APPLIED AT THE PAVEMENT SURFACE. SPECIFIC SOLUTIONS USING A PLANE-STRESS FINITE-ELEMENT IDEALIZATION WHEREIN NONLINEAR MATERIAL RESPONSES AND BOND EFFECTS AT LAYER INTERFACES COULD BE CONSIDERED ARE PRESENTED FOR CRACKING IN AN ASPHALT CONCRETE BRIDGE DECK SURFACING, FOR DEVELOPMENT OF CRACKING IN AN ASPHALT CONCRETE LAYER OVER A CEMENT-TREATED BASE THAT WAS CRACKED DUE TO LOAD, AND FOR CRACKING RESULTING FROM TRACTIONS IMPOSED ON AN AIRFIELD PAVEMENT BY A BRAKING AIRCRAFT. THE BRIDGE DECK SURFACING INCORPORATED TWO DIFFERENT SUPPORT CONDITIONS. RIGID AND FLEXIBLE, AND TWO SETS OF MATERIAL CHARACTERISTICS. FOR THE FLEXIBLE-SUPPORT CONDITION, THE BITUMINOUS SURFACING FAILED FAILED BY COMPRESSION AND THE STIFFER MATERIAL RUPTURED AT A LOWER LOAD; FOR THE RIGID-SUPPORT CONDITION, THE STIFFER MATERIAL FAILED IN TENSION AT A HIGHER LOAD THAN THE LOW-MODULUS MATERIAL, WHICH EXHIBITED A COMPRESSIVE FAILURE. THE EFFECT OF LOW BOND STRENGTH ON THIS LATTER CONDITION WAS TO SHIFT THE FAILURE CONDITION FROM COMPRESSION TO A MIXED MODE. THE ULTIMATE STRENGTH OF A PAVEMENT CONTAINING CEMENT-TREATED BASE WAS DETERMINED BY TENSILE FRACTURE OF THE CEMENT-TREATED BASE FOLLOWED BY SUBSEQUENT CRACKING OF THE UPPER PORTION OF THE ASPHALT CONCRETE LAYER. BRAKING TRACTIONS IN A RUNWAY PAVEMENT RESULTED IN LOWERING THE TOTAL LOAD TO FAILURE BY INCREASING THE TENSILE STRESSES AT THE HEEL OF THE LOADED AREA. A WEAK INTERFACE ALSO RESULTED IN A FURTHER DECREASE OF THE TOTAL FRACTURE LOADS.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1973/466/466-009.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309022509
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Theory of 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:
  • SALAM, Y M
  • Monismith, C L
• Conference:
  • 52nd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1973-1-22 to 1973-1-26
• Publication Date: 1973

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 127-138
• Monograph Title: Pavement systems analyses
• Serial:
  • Highway Research Record
  • Issue Number: 466
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Airport runways; Asphalt concrete; Asphalt pavements; Braking; Bridge decks; Concrete; Flexible pavements; Fracture mechanics; Pavement cracking; Rigid pavements; Tension; Traffic loads; Ultimate strength
• Uncontrolled Terms: Fracture; Tensile stress
• Subject Areas: Freight Transportation; Highways; Pavements;

Filing Info

• Accession Number: 00207625
• Record Type: Publication
• ISBN: 0309022509
• Files: TRIS, TRB
• Created Date: May 15 1974 12:00AM