International Airfield and Highway Pavements Conference 2019
Effect of Nanomaterials on Cracking and Rutting Resistance of HMA
Publication: Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology
ABSTRACT
Nanotechnology has been increasingly used in asphalt modification for its remarkable effect in improving the binder and mix performance. Rheological properties of binder play major roles in rutting, fatigue cracking, and low-temperature cracking resistance of hot mix asphalt (HMA) pavement. Rolling thin film oven (RTFO) and pressure aging vessel (PAV) were used to simulate short-term and long-term aging, respectively. Rheological properties of asphalt binders (un-aged, RTFO-aged, and PAV-aged from each binder) were tested using dynamic shear rheometer (DSR). The results were published in a different paper. This study was conducted to investigate the effect of nanomaterials (NMs) on the rutting, fatigue cracking, and low-temperature cracking resistance of HMA mixes. Two types of NMs, nanoclay and nanoalumina, were mixed separately into performance grade (PG) 58-28 and 64-28 asphalt binders at 0% NM (control), 1, 5, and 7% by binder weight. Hot mix asphalt specimens (150 mm diameter and 75 mm high) were compacted with 6.5–7.5% air voids using superpave gyratory compactor. Asphalt pavement analyzer (APA), semi-circular bending (SCB), and disc-shaped compact tension (DCT) were used to determine the rutting, fatigue cracking, and low-temperature cracking resistance of the mixes, respectively. Cracking of mixes was measured in terms of fracture energy. The results showed that NMs increased the rutting resistance of the mixes, but the mixes could be more susceptible to cracking due to increased stiffness.
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Published In
Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology
Pages: 88 - 95
Editors: Imad Al-Qadi, Ph.D., University of Illinois, Urbana-Champaign, Hasan Ozer, Ph.D., University of Illinois, Urbana-Champaign, Andreas Loizos, Ph.D., National Technical University of Athens, and Scott Murrell, Applied Research Associates
ISBN (Online): 978-0-7844-8247-6
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Jul 18, 2019
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