SYMPOSIA PAPER Published: 01 January 1992

The Determination of SBS, EVA and APP Polymers in Modified Bitumens


The use of polymer-modified bitumens has gained importance in road construction over the past few years. The fields of application are relatively varied and include waterproofing sheets as well as binders for surface dressings, porous asphalt, mastic asphalt and asphalt concrete. Those polymers mainly used are styrene-butadiene-styrene SBS copolymers, ethylene-vinyl acetate EVA and atactic polypropylene APP. In addition to adequate and constant quality of the modified binder, the user is entitled to require a qualitative identification and quantitative determination of the polymer incorporated in a bitumen. Infrared absorption spectroscopy is suggested as an appropriate technique for identifying and determining polymer components in the case of SBS and EVA. Two techniques of preparing samples for measurement and two methods of quantitative interpretation are described. As for APP, its quantitative determination is based on selective solubility in different solvents and infrared spectroscopy.

Author Information

Choquet, FS
Ista, EJ
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Developed by Committee: D04
Pages: 35–49
DOI: 10.1520/STP17825S
ISBN-EB: 978-0-8031-5180-2
ISBN-13: 978-0-8031-1413-5