Comparison of Fatigue Resistance of HMA and WMA Mixtures Modified by SBS

This study aims to investigate the effect of warm mix asphalt (WMA) additives on fatigue life of unmodified and SBS-modified (styrene butadiene styrene) asphalt mixes. Two different WMA additives, including Aspha-min and Sasobit were used to fabricate WMA specimens. A fatigue test was performed on warm polymer modified asphalt (PMA) by indirect tensile test on two stress levels (300,450 kPa) at 20 °C and fatigue life was compared with PMA mixture. Also, an indirect tensile strength (ITS) test was performed to determine the moisture susceptibility of warm PMA. In order to evaluate the fatigue performance of warm mix asphalt (WMA) mixtures in comparison with hot mixture asphalt (HMA), four-point flexural beam test was employed. Four- point flexural beam test was conducted at four strain levels (650, 800, 1000 and 1200 µ?) and frequency of 7.5 Hz at 20 °C. According to the test results, it was shown that warm PMA mixtures prepared by Aspha-min and Sasobit, have less fatigue resistance in comparison with PMA mixture. Also the fatigue resistance of warm PMA mixture made by Sasobit is greater than fatigue resistance of warm PMA mixture made by Aspha-min. Based on the ITS test results, warm PMA with Sasobit additive and PMA achieved the desirable tensile strength ratio (TSR) criterion (80%) but warm PMA Aspha-min had TSR lower than 80%. Also fatigue life determination based on 50% reduction in initial stiffness showed that the fatigue life of HMA mixture is less than WMA mixtures at lower strain levels whereas it was comparable with warm mix asphalt at higher strain levels.

• Record URL:
  • https://doi.org/10.1016/j.sbspro.2013.11.109
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S187704281304500X
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/18770428
• Supplemental Notes:
  • © 2013 Mansour Fakhri et al.
• Authors:
  • Fakhri, Mansour
  • Ghanizadeh, Ali Reza
  • Omrani, Hamed
• Conference:
  • 2nd Conference of Transportation Research Group of India (2nd CTRG)
  • Location: Agra , India
  • Date: 2013-12-12 to 2013-12-15
• Publication Date: 2013-12-2

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 168-177
• Serial:
  • Procedia - Social and Behavioral Sciences
  • Volume: 104
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 1877-0428
  • Serial URL: http://www.sciencedirect.com/science/journal/18770428/53
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Beams; Fatigue strength; Fatigue tests; Hot mix asphalt; Performance; Polymer asphalt; Styrene butadiene styrene; Tensile strength; Warm mix paving mixtures
• Identifier Terms: Aspha-Min; Sasobit
• Subject Areas: Bridges and other structures; Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01502176
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 23 2013 10:38AM