Laboratory Evaluation of Sustainable PMA Binder Containing Styrene-Isoprene-Styrene (SIS) and Thermoplastic Polyurethane

Hyun Hwan Kim, Mithil Mazumder, Soon-Jae Lee and Moon-Sup Lee
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Hyun Hwan Kim: Department of Engineering Tehcnology, Texas State University, San Marcos, TX 78666, USA
Mithil Mazumder: Department of Engineering Tehcnology, Texas State University, San Marcos, TX 78666, USA
Soon-Jae Lee: Department of Engineering Tehcnology, Texas State University, San Marcos, TX 78666, USA
Moon-Sup Lee: Korea Institute of Civil Engineering and Building Technology, Goyang, Gyeonggi 10223, Korea

Sustainability, 2020, vol. 12, issue 23, 1-14

Abstract: In this study, thermoplastic polyurethane (TPU) and styrene-isoprene-styrene (SIS) were utilized to enhance asphalt binder properties. Superpave asphalt binder tests and multiple stress creep recovery (MSCR) were conducted to evaluate the physical and rheological performance (viscosity, rutting, and cracking properties) of the asphalt binders before and after short-term aging and after the long-term aging process. The results showed that (i) TPU has a positive effect on workability, including the mixing and compaction processes, which was evident from the reduced binder viscosity; (ii) asphalt binders with TPU and SIS showed better rutting resistance compared to the SIS binders without TPU; (iii) the cracking resistance of asphalt binders was found to be improved significantly with the addition of TPU; and (iv) TPU has the potential to be considered as a sustainable polymer modifier for producing bearable asphalt binders by improving rutting and crack resistance without increasing the melting temperature of the asphalt binders.

Keywords: TPU; SIS; viscosity; rutting; cracking (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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