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:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
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Supplemental Notes:
- © 2014 American Society of Civil Engineers.
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Authors:
- Domingos, M D I
- Faxina, A L
- Publication Date: 2014-11
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: 04014054
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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