Laboratory Evaluation of Workability and Moisture Susceptibility of Warm-Mix Asphalt Mixtures Containing Recycled Asphalt Pavements
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 5
Abstract
Warm mix asphalt (WMA) and recycled asphalt pavements (RAP) are two popularly used sustainable technologies in pavement industry. Because RAP materials contain aged binder, its use is limited to a certain percentage in hot mix asphalt (HMA) as it may affect the workability and, fatigue and thermal cracking performance. Higher percentages of RAP can be incorporated into HMA with softer asphalt binder or in combination with softening agent. However, the combination of WMA and RAP may allow for greater percentages of RAP without modifying the original HMA job mix formula. The objective of this study was to explore the use of higher percentage of RAP, using two different WMA technologies—Evotherm additive and foamed asphalt—to study the workability and moisture sensitivity of WMA-RAP asphalt mixtures. The study found that the use of WMA technologies can eliminate the need for a softer grade binder in high RAP mixtures.
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Acknowledgments
The authors thank the North Carolina Department of Transportation (NCDOT) for funding this research project. The authors are especially thankful to the personnel at NCDOT M&T laboratory for their continued support throughout the project.
References
AASHTO. (2007). “Standard method of test for determining the asphalt binder content of hot-mix asphalt (HMA) by the ignition method.” Washington, DC.
AASHTO. (2013a). “Standard method of test for mechanical analysis of extracted aggregate.” Washington, DC.
AASHTO. (2013b). “Standard method of test for viscosity determination of asphalt binder using rotational viscometer.” Washington, DC.
AASHTO. (2014). “Standard method of test for resistance of compacted asphalt mixtures to moisture-induced damage.” Washington, DC.
AASHTO. (2015). “Standard practice for superpave volumetric design for asphalt mixtures.” Washington, DC.
Biro, S., Gandhi, T., and Amirkhanian, S. (2009). “Midrange temperature rheological properties of warm asphalt binders.” J. Mater. Civ. Eng., 316–323.
Bonaquist, R. (2011). “Mix design practices for warm mix asphalt.” NCHRP Rep. 691, Transportation Research Board, Washington, DC.
Buss, A., Kuang, Y., Williams, C. R., Bausano, J., Cascione, A., and Schram, S. (2014). “Influence of warm mix asphalt additive and dosage rate on construction and performance of bituminous pavements.” Transportation Research Board 93rd Annual Meeting, Transportation Research Board, Washington, DC.
Copeland, A., D’Angelo, J., Dongre, R., Belagutti, S., and Sholar, G. (2010). “Field evaluation of high reclaimed asphalt pavement-warm-mix asphalt project in Florida.” Transp. Res. Rec., 2179, 93–101.
Faheem, A. F., and Bahia, H. U. (2007). Using the superpave gyratory compactor to estimate rutting resistance of hot mix asphalt, Transportation Research Board, Washington, DC, 45–61.
Hanz, A. J. (2012). “Quantifying the impacts of warm mix asphalt on constructability and performance.” Ph.D. dissertation, Univ. of Wisconsin, Madison, WI.
Hurley, G. C., and Prowell, B. D. (2005). “Evaluation of Aspha-Min®Zeolite for use in warm mix asphalt.” National Center for Asphalt Technology, Auburn, AL.
Kristjansdottir, O., Muench, S., Michael, L., and Burke, G. (2007). “Assessing potential for warm-mix asphalt technology adoption.” Transp. Res. Rec., 2040, 91–99.
Kuang, Y. (2012). “Evaluation of Evotherm as a WMA technology compaction and anti-strip additive.” M.S. thesis, Iowa State Univ., Ames, IA.
Leiva-Villacorta, F. (2007). “Relationships between laboratory measured characteristics of HMA and field compactability.” M.S. thesis, Auburn Univ., Auburn, AL.
Malladi, H., Ayyala, D., Tayebali, A. A., and Khosla, N. P. (2015). “Laboratory evaluation of warm-mix asphalt mixtures for moisture and rutting susceptibility.” J. Mater. Civ. Eng., .
Mallick, R. B., Kandhal, P. S., and Bradbury, R. L. (2008). “Using warm-mix asphalt technology to incorporate high percentage of reclaimed asphalt pavement material in asphalt mixtures.” Transp. Res. Rec., 2051, 71–79.
McDaniel, R., and Anderson, M. R. (2001). “NCHRP 452: Recommended use of reclaimed asphalt pavement in the superpave mix design method: Technician’s manual.” Transportation Research Board of the National Academies, Washington, DC.
MeadWestvaco Corporation. (2015). “Evotherm®3G warm mix asphalt.” ⟨http://nustarenergy.com/Reports/Evotherm%203G/Evotherm3GFV2.pdf⟩ (Oct. 21, 2016).
Tao, M., and Mallick, R. B. (2009). “Effects of warm-mix asphalt additives on workability and mechanical properties of reclaimed asphalt pavement material.” Transp. Res. Rec., 2126, 151–160.
West, R., Willis, J. R., and Marasteanu, M. (2013). “NCHRP 752: Improved mix design, evaluation, and materials management practices for hot mix asphalt with high reclaimed asphalt pavement content.” Transportation Research Board, Washington, DC.
Wielinski, J., Hand, A., and Rausch, D. M. (2009). “Laboratory and field evaluations of foamed warm-mix asphalt projects.” Transp. Res. Rec., 2126, 125–131.
Willis, J. R., Turner, P., Julian, G., Taylor, A. J., Tran, N., and de Goes Padula, F. (2012). “NCAT 12-03: Effects of changing virgin binder grade and content on rap mixture properties.” National Center for Asphalt Technology, Auburn, AL.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 5 • May 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Jun 6, 2016
Accepted: Sep 19, 2016
Published online: Nov 17, 2016
Discussion open until: Apr 17, 2017
Published in print: May 1, 2017
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