ASPHALT VISCOSITY-RELATED PROPERTIES OF IN-SERVICE PAVEMENTS IN PENNSYLVANIA

SIX VISCOSITY-GRADED ASPHALTS FROM DIFFERENT SOURCES WERE USED IN THE CONSTRUCTION OF THE PAVEMENTS STUDIED AND REPORTED IN THIS PAPER. TESTS TO DETERMINE THE VISCOSITY-RELATED PROPERTIES OF THE ORIGINAL ASPHALTS, AS WELL AS THE ASPHALTS RECOVERED FROM TIME TO TIME FROM THE PAVEMENTS IN SERVICE, HAVE BEEN CONDUCTED. EVALUATION OF THE PERFORMANCE OF THESE TEST PAVEMENTS HAS BEEN CARRIED OUT BY A TEAM OF FIVE ENGINEERS. THE AGING INDEX BASED ON VISCOSITY AT 77 F (25 C) HAS BEEN FOUND TO CONFORM TO THE PAVEMENT PERFORMANCE RATING AND THUS SEEMS TO BE MORE MEANINGFUL TO INDICATE COMPARATIVE AGING AND LIFE EXPECTANCY OF THE TEST PAVEMENTS. SHEAR SUSCEPTIBILITY OF THE ASPHALT CEMENTS SEEMS TO BE ONE OF THE MAJOR FACTORS AFFECTING THE PAVEMENT PERFORMANCE. PRESENT VISCOSITY-GRADED SPECIFICATIONS SHOULD BE SUPPLEMENTED WITH A MAXIMUM PERMISSIBLE SHEAR-SUSCEPTIBILITY VALUE AT 77 F SO AS TO CONTROL THE DURABILITY OF THE ASPHALTS. THE MAXIMUM AMOUNT OF SHEAR SUSCEPTIBILITY THAT MAY DEVELOP IN A PAVING-GRADE ASPHALT PRIOR TO PAVEMENT FAILURE IS INDICATED IN THE DATA OBTAINED /AUTHOR/

• Supplemental Notes:
  • ASTM STP 532
• Authors:
  • Kandhal, P S
  • Sandvig, L D
  • Koehler, W C
  • Wenger, M E
• Publication Date: 1973-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 66-78
• Serial:
  • ASTM Special Technical Publications
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Asphalt; Asphalt cement; Asphalt pavements; Bitumen; Durability; Index tests; Pavement performance; Pavements; Service life; Shear strength; Viscosity
• Old TRIS Terms: Aging; Index properties; Inservice; Pavement life
• Subject Areas: Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00211838
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 27 1974 12:00AM