Thermo-mechanical Properties of Stone Mastic Asphalt (SMA) - Experimentation and Rheological Testing

Although a high content of unmodified binder is used, Stone Mastic Asphalt (SMA) generally shows good resistance to rutting due to the stone-to-stone contact. In Quebec, a test section was built in 2004 to evaluate the performance of SMA used as overlay for highly cracked pavements. Experimental results on the thermo-mechanical behaviour of SMA are presented herein (Complex modulus, Thermal coefficient, direct tension and compression tests and Thermal Stress Restrained Specimen Test-TSRST). The DBN model (Di Benedetto and Neifar) based on a thermo-visco-elasto-plastic approach was adopted for the modeling of experimental data. Numerical simulations show the need to consider non-linear behaviour for an accurate prediction of stress evolution in the TSRST. The DBN model is also used to evaluate the variation of the thermal stress under sinusoidal temperature variation with a 24-hour period. For the first 3 to 5 cycles, the maximum thermal tensile stress at higher cycles increases comparing to the previous cycles. Beyond that, the maximum tensile stress stabilizes. This phenomenon is important for Quebec environment during thaw periods where temperature variations are relatively high.

• Corporate Authors:

  International Society for Asphalt Pavements

  4711 Clark Avenue, Suite G
  White Bear Lake, MN  United States  55110
• Authors:
  • Perraton, D
  • Di Benedetto, H
  • Olard, F
  • BAAJ, H
  • Sauzeat, C
• Conference:
  • 10TH INTERNATIONAL CONFERENCE ON ASPHALT PAVEMENTS - AUGUST 12 TO 17, 2006, QUEBEC CITY, CANADA
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Pagination: p. vol1,378-87
• Monograph Title: 10th International Conference on Asphalt Pavements - August 12 to 17, 2006, Quebec City, Canada

Subject/Index Terms

• TRT Terms: Conferences; Field tests; Mastic asphalt; Properties of materials; Rutting; Strength of materials; Tests
• Geographic Terms: Canada
• Subject Areas: Design; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01084433
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: TAC
• Created Date: Jan 16 2008 9:01AM