DEVELOPMENT OF RELATIONSHIPS BETWEEN SHRP ASPHALT TEST PARAMETERS AND STRUCTURAL MIXTURES FOR MECHANISTIC ANALYSIS AND REHABILITATION DESIGN OF FLEXIBLE PAVEMENT

A laboratory study was conducted to evaluate the relationships between the results of the Strategic Highway Research Program (SHRP) binder tests and those of the conventional binder tests, and the applicability of these tests for prediction of asphalt mixture properties. The scope of the study covers six different base asphalts from five different refinery sources and three types of modifiers, namely a ground tire rubber (GTR), styrene-butadiene rubber (SBR) and styrene block copolymer. The results show that the G*sin delta and G* values as measured by the SHRP dynamic shear rheometer correlate well with the penetration and viscosity at similar temperatures. The creep stiffness as measured by the SHRP bending beam rheometer at low temperatures correlates well with the Fraass breaking point temperature. However, the failure strain as measured by the direct tension tester at low temperatures correlates poorly to the Fraass breaking point temperature. Mixture stiffness as determined by the SHRP indirect tensile creep test at -10 deg C was found to be linearly related to the creep stiffness of the binder at the same temperature. The tensile strength, failure strain and fracture energy of the mixtures as measured by the indirect tensile strength test at -10 deg C were found to be not related to the binder creep stiffness. The resilient modulus was found to be close to the stiffness of the mixture at 1 second as determined by the indirect tensile creep test. The test results indicate that asphalt modification with SBR or GTR could improve both the high temperature and low temperature characteristics of the asphalt binders.

• Corporate Authors:

  University of Florida, Gainesville

  Department of Civil Engineering, P.O. Box 116580
  Gainesville, FL  United States  32611-6580

  Florida Department of Transportation

  Haydon Burns Building, 605 Suwanee Street
  Tallahassee, FL  United States  32301

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Tia, M
  • Ruth, B E
  • Roque, R
  • Lee, M-G
  • Lu, Debiao
• Publication Date: 1997-2

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 298 p.

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Asphalt tests; Blocks; Copolymers; Creep; Crumb rubber; Driver rehabilitation; Flexible pavements; High temperature; Laboratory tests; Low temperature; Mechanical analysis; Mechanistic design; Modulus of resilience; Pendulum tests; Properties of materials; Stiffness; Styrene butadiene rubber; Styrenes; Tension tests; Viscosity
• Identifier Terms: Strategic Highway Research Program
• Uncontrolled Terms: Indirect tensile test; Rehabilitation
• Old TRIS Terms: Styrene block copolymers
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00746723
• Record Type: Publication
• Report/Paper Numbers: WPI 0510684, Final Rept,, State Job 99700-3529-119,, UF Proj 4910450445412
• Contract Numbers: B-8349
• Files: TRIS, USDOT, STATEDOT
• Created Date: Mar 17 1998 12:00AM