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

Domingos, M. D. I. / Faxina, A. L.

The effect of longer creep and recovery times—from $1 / 9$ to $2 / 18$ s—on the percent recoveries (R) and the nonrecoverable compliances ( $J_{n r}$ ) 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 $J_{n r}$ values decreased at typical high pavement temperatures. Unlike the other asphalt binders, the $AC + EVA$ showed small increases in $R$ and slight decreases in $J_{n r}$ 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.

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

Domingos, M. D. I. / Faxina, A. L.

The effect of longer creep and recovery times—from $1 / 9$ to $2 / 18$ s—on the percent recoveries (R) and the nonrecoverable compliances ( $J_{n r}$ ) 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 $J_{n r}$ values decreased at typical high pavement temperatures. Unlike the other asphalt binders, the $AC + EVA$ showed small increases in $R$ and slight decreases in $J_{n r}$ 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.

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

Domingos, M. D. I. / Faxina, A. L.

The effect of longer creep and recovery times—from $1 / 9$ to $2 / 18$ s—on the percent recoveries (R) and the nonrecoverable compliances ( $J_{n r}$ ) 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 $J_{n r}$ values decreased at typical high pavement temperatures. Unlike the other asphalt binders, the $AC + EVA$ showed small increases in $R$ and slight decreases in $J_{n r}$ 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.

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Titel:

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

Beteiligte:

Domingos, M. D. I. (Autor:in) / Faxina, A. L. (Autor:in)

Erschienen in:

Journal of Transportation Engineering ; 140

Erscheinungsdatum:

07.07.2014

ISSN:

0733-947X , 1943-5436

DOI:

https://doi.org/10.1061/(ASCE)TE.1943-5436.0000707

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Unbekannt

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