00769538

Component

https://doi.org/10.3141/1661-13

http://scholar.google.com...SSON&publication_year=1999

Styrene-butadiene-styrene (SBS) polymer-modified bitumens were prepared in the laboratory and characterized using rheological and chemical methods. The results showed that morphology of the modified binders was influenced by bitumen composition and polymer content. Polymer modification was found to improve the rheological properties of bitumens. The degree of modification was dependent on the base bitumen and SBS content and structure. It was also observed that aging resulted in degradation of the SBS polymer. Changes in the rheological properties of aged modified binders were dependent on a combined effect of bitumen oxidation and polymer degradation, which varied with the source and grade of bitumen and type and content of polymer. Generally, the aged modified binders showed better rheological properties than aged base bitumens. The study also indicated that aging index is not suitable for evaluating the aging susceptibility of polymer-modified binders.

This paper appears in Transportation Research Record No. 1661, Hot-Mix Asphalt Binders.

English

p. 83-92

1999

Transportation Research Record

0309070589

Figures (7) ; References (16) ; Tables (5)

Aging (Materials); Chemical analysis; Chemical composition; Oxidation; Polymer asphalt; Polymers; Rheological properties; Styrene butadiene styrene

Polymer content

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Sep 29 1999 12:00AM

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