Creep-Recovery Behavior of Asphalt Binders Modified with SBS and PPA

The main objective of this study was to investigate the impact of longer creep-recovery times on the percent recovery (R) and the nonrecoverable compliance (Jnr) of three asphalt cements (AC), or binders, modified with (1) styrene-butadiene-styrene (SBS) copolymer, (2) polyphosphoric acid (PPA), and (3) SBS+PPA. The base material is a 50/70 pen-grade (PG 64-xx) asphalt binder and the modified asphalt binders have the same high-temperature performance grade (PG 76-xx). The impact of longer creep-recovery times was addressed by calculating the percent recovery and the nonrecoverable compliance ratios at the test temperatures of 70°C and 76°C. The multiple stress creep and recovery (MSCR) test was used to determine the R and Jnr values at the stress levels of 0.1 and 3.2 kPa. Two creep-recovery times were used, namely, 1/9 and 2/18  s. The highest R values and the lowest Jnr values can be found in the AC+PPA formulation. The increase in both creep-recovery times caused less impact on the rutting susceptibility of the AC+SBS+PPA than the AC+SBS and the AC+PPA under the same MSCR test conditions.

• Record URL:
  • https://doi.org/10.1061/(ASCE)MT.1943-5533.0000869
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Supplemental Notes:
  • © 2014 American Society of Civil Engineers.
• Authors:
  • Domingos, M D I
  • Faxina, A L
• Publication Date: 2014-4

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 781-783
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 26
  • Issue Number: 4
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Asphalt cement; Binders; Creep properties; Rutting; Styrene butadiene styrene; Subbase materials
• Uncontrolled Terms: Polyphosphoric acid
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01522411
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Apr 22 2014 4:07PM