ASPHALT MIXTURE BEHAVIOR IN REPEATED FLEXURE, TE 69-6

FACTORS AFFECTING THE FATIGUE RESPONSE OF ASPHALT PAVING MIXTURES ARE STUDIED, AND THE FATIGUE FACTOR IS INCORPORATED INTO THE DESIGN OF ASPHALT CONCRETE PAVEMENTS. INVESTIGATIONS WERE CONCENTRATED IN THREE AREAS, NAMELY: (1) DEVELOPMENT OF FATIGUE DATA FOR AN IN-SERVICE PAVEMENT NEAR FOLSOM, CALIFORNIA; (2) DEVELOPMENT OF A SIMPLIFIED REPRESENTATION OF THE FATIGUE RESPONSE OF CALIFORNIA TYPE MIXES AS INPUT TO A FATIGUE SUBSYSTEM FOR PAVEMENT DESIGN; AND (3) DEFINITION OF A RELATIONSHIP BETWEEN DIRECT TENSILE AND FATIGUE RESPONSE OF ASPHALT MIXTURES RECOGNIZING THAT DIRECT TENSILE TESTING OFFERS A POTENTAILLY USEFUL AND SIMPLE MEANS BY WHICH THE FATIGUE FACTOR CAN BE INCORPORATED IN THE MATERIALS CONTROL PROCESS. REASONABLE AGREEMENT BETWEEN DATA OBTAINED FROM THE LABORATORY COMPACTED AND THE FIELD SPECIMENS WERE OBSERVED. THE DATA WILL SERVE AS A REASONABLE BASIS FOR THE PREDICTION OF SERVICE LIFE OF THE FOLSOM PAVEMENT. THESE DATA, AS WELL AS THE DATA OBTAINED IN PREVIOUS INVESTIGATIONS, WERE COMBINED TO DEVELOP A PRELIMINARY DESIGN DIAGRAM WHICH CAN BE A USEFUL PART OF THE FATIGUE SUBSYSTEMS. A SIMPLE FRACTURE TEST SUCH AS THAT REPORTED HEREIN MAY SERVE AS A USEFUL TECHNIQUE TO INCORPORATE FATIGUE CONSIDERATIONS IN MATERIALS SPECIFICATIONS. STIFFNESS DETERMINATIONS AT A PARTICULAR TEMPERATURE COMPARE REASONABLY WELL WITH THOSE MEASURED IN FLEXURE WHEN THE SAME TIME OF LOADING IS UTILIZED. THERE IS SOME INDICATION THAT BY SPECIFYING A MINIMUM FRACTURE STRENGTH AND STIFFNESS (AT A PARTICULAR TEMPERATURE AND TIME OF LOADING), FATIGUE RESPONSE FOR A MIX DESIGNED ACCORDING TO THE CALIFORNIA PROCEDURE MAY BE REASONABLY ASSURED. /AUTHOR/

• Corporate Authors:

  University of California, Berkeley

  Berkeley, CA  United States  94720

  California Division of Highways

  Bridge Department
  Sacramento, CA  United States  05914

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Epps, J A
  • Monismith, C L
• Publication Date: 1969-12

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt pavements; Compaction; Fatigue (Physiological condition); Field tests; Flexure; Fracture mechanics; Materials adaptation and use; Mixtures; Pavement design; Service life; Specifications; Tensile properties; Testing
• Uncontrolled Terms: Fracture; Laboratory compaction
• Old TRIS Terms: Materials control
• Subject Areas: Construction; Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00210450
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: D-6-1
• Files: TRIS, USDOT
• Created Date: Mar 7 1971 12:00AM