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ARPN Journal of Science and Technology

The Effect of Aging on Bitumen Properties Modified With Styrene-Butadiene-Styrene (SBS) Polymer

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Author Suleiman Arafat Yero, Mohd. RosliHainin
ISSN 2225-7217
On Pages 593-596
Volume No. 2
Issue No. 7
Issue Date August 01, 2012
Publishing Date August 01, 2012
Keywords Bitumen, asphalt, aging, penetration and softening point


The study investigated the aging properties of modified bitumen penetration grade PG 76-22 (binder). The aging was simulated using the rolling film oven (RTFOT) and pressure aging vessel (PAV) for short-term and long-term aging during production and lying of asphalt mixtures, though the actual time of long-term aging in the field varies depending on paving times and usage. The empirical tests, which include penetration and softening points, were conducted to ascertain the binder consistency and also the viscosity of the binder was investigated before and after aging. The RTFOT was conducted at 1630C for 85min, and PAV for 20hrs. Results from the study indicated that aging resulted in oxidation of the bitumen with increase in the stiffness of the binder. It was observed that aging increased the viscosity, decreased the binder penetration and increased the softening point of the modified bitumen. It could be concluded that aging increases hardness, thereby decreasing the penetration and increasing the binder softening point and viscosity.

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