Superpave In-Situ Stress/Strain Investigation, Phase II Volume II: Materials Characterization

The characterization of materials is an integral part of the overall effort to validate the Superpave system and to calibrate the performance prediction models for the environmental conditions observed in the Commonwealth of Pennsylvania. Material properties are among the most important input parameters to the models of the Mechanistic Empirical Pavement Design Guide for flexible pavements. An extensive laboratory testing program was followed during Phases I and II of the Superpave In-Situ Stress Strain Investigation (SISSI) project to determine binder properties, mix volumetric properties, and mix engineering properties. Testing of SISSI binders during Phase II with the bending beam rheometer at various temperatures and loading times showed that the equivalence principle of testing at low temperature is not satisfied. The indirect tensile creep and strength tests on wearing layers of SISSI provided a ranking of these mixtures based on their low temperature material properties. Fracture analysis of SISSI mixtures indicated that the maximum tensile stress is independent of the type of asphalt concrete mixtures. Considerable deviations were observed between the calculated fracture energy from linear elastic and linear viscoelastic solutions. Results of repeated shear testing at maximum pavement temperature indicate performance of SISSI mixtures to be in the range of good to excellent since no excessive permanent deformation was observed from these laboratory tests. The present report is one of four volumes, Volume I: Summary Report; Volume II: Materials Characterization; Volume III: Field Data Collection and Summary; Volume IV: Mechanistic Analysis and Implementation.

Language

  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 151p

Subject/Index Terms

Filing Info

  • Accession Number: 01146784
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-PA-2009-009-999012 HA 2006-02, PTI 2009-17
  • Contract Numbers: Contract No. 999012 Project HA2006-02
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Dec 7 2009 12:20PM