AGE-HARDENING OF ASPHALT CEMENT AND ITS RELATIONSHIP TO LATERAL CRACKING OF ASPHALTIC CONCRETE

INVESTIGATIONS WERE CONDUCTED TO EXAMINE THE HARDENING OF ASPHALT INSERVICE AND THE RELATIONSHIP OF THIS HARDENING TO THE OCCURRENCE OF LATERAL CRACKING. FIFTEEN PAVEMENT SITES OF VARYING AGES AND PERFORMANCE WERE SAMPLED AND ANALYSIS OF RECOVERED ASPHALT AND AGGREGATE PERFORMED. PENETRATION AND SOFTENING POINT TESTS AND INVERSE GAS-LIQUID CHROMATOGRAPHIC TESTS WERE CONDUCTED TO DETERMINE THE AGE-ASSOCIATED ALTERATION OF ASPHALT CEMENT. INCREASED HARDENING AND OXIDATION WERE OBSERVED WITH PAVEMENTS WITH HIGH AIR VOIDS CONTENT AND EXISTING LATERAL CRACKING. INCREASED HARDENING WAS ALSO NOTED WITH AGE WHERE SAMPLES WERE TAKEN PERIODICALLY AFTER INITIAL CONSTRUCTION. IT IS CONCLUDED THAT OXIDATION OF THE ASPHALT CEMENT CAN BE RELATED TO LATERAL CRACKING. /AUTHOR/

• Supplemental Notes:
  • pp 1-39, 2 FIG, 5 TAB, 18 REF, 1 APP
• Authors:
  • Gietz, R H
  • Lamb, D R
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1968-2

Subject/Index Terms

• TRT Terms: Age hardening; Air voids; Asphalt cement; Asphalt concrete; Asphalt pavements; Chromatography; Gas chromatography; Oxidation; Pavement cracking; Softening point; Soil penetration test
• Old TRIS Terms: Air voids content; Chromatographic analysis; Inservice; Softening point test
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00210765
• Record Type: Publication
• Files: TRIS
• Created Date: May 24 1994 12:00AM