Abstract:
This study evaluated the relative effect of different modifiers and antistripping additives on the rheological properties of asphalt binder PG 58-28, commonly used in Newfoundland and Labrador, Canada. Four antistripping additives: ZycoTherm SP2, Kling Beta 2914, Pave Bond Lite, and AD-Here were used at different dosage rates for laboratory investigations. These antistripping additives were blended into a styrene-butadiene-styrene (SBS) polymer and Gilsonite-modified binder. Later, all binders were aged using rolling thin film oven (RTFO) method. The rutting and cracking parameters, such as the Superpave rutting parameter, Shenoy’s rutting parameter, nonrecoverable creep compliance, crossover frequency, rheological index, and Glover–Rowe parameter were evaluated for SBS- and Gilsonite-modified binders. Comparative rutting parameters analysis showed that both SBS- and Gilsonite-modified binders enhance the rutting performance of the asphalt binder. Additionally, the moisture damage test from the surface free energy test and cracking test revealed that the antistripping agent with SBS-modified binder performed better than the Gilsonite-modified binder.
Authors: Islam T, Hossain K, Khan S, Aurilio M, Bazan C.
Link(s) for the Paper: Journal Website | ResearchGate