Multiple Stress Creep-Recovery Test of Ethylene Vinyl Acetate and Polyphosphoric Acid-Modified Binder

The effect of longer creep and recovery times—from 1/9 to 2/18 s—on the percent recoveries (R) and the nonrecoverable compliances (Jnr) of some modified asphalt binders was investigated. A 50/70 base asphalt cement [AC, penetration grade (PG) 64-xx] was modified using ethylene vinyl acetate (EVA) copolymer, polyphosphoric acid (PPA), and a combination of both additives to produce the AC+EVA, AC+PPA, and AC+EVA+PPA formulations, respectively. These formulations have the same high PG grade in the original Superpave specification (PG 76-xx). All the materials were tested at five equally spaced temperatures ranging from 52 to 76°C. The base binder experienced a decrease in its rutting potential after the addition of modifiers because the R values increased and the Jnr values decreased at typical high pavement temperatures. Unlike the other asphalt binders, the AC+EVA showed small increases in R and slight decreases in Jnr at lower temperatures (up to 64°C) with increasing loading-unloading times, which can be translated into minor reductions in its susceptibility to rutting when both times were doubled.

• Record URL:
  https://doi.org/10.1061/(ASCE)TE.1943-5436.0000707
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
• Supplemental Notes:
  • © 2014 American Society of Civil Engineers.
• Authors:
  • Domingos, M D I
  • Faxina, A L
• Publication Date: 2014-11

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04014054
• Serial:
  • Journal of Transportation Engineering
  • Volume: 140
  • Issue Number: 11
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-947X
  • Serial URL: https://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: Acids; Binders; Creep; Creep tests; Cyclic tests; Rheology; Rutting; Superpave; Temperature
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01531483
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Jul 24 2014 3:22PM