Characterization of High RAP/RAS Asphalt Mixtures Using Resonant Column Tests
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 11
Abstract
Using recycled materials in construction of asphalt pavements yields both economic and technical advantages. Recycled asphalt shingles (RAS) and reclaimed asphalt pavement (RAP) are two major sources to serve this purpose for which proper design and characterization are key elements. In this study, engineering properties of asphalt concrete containing RAP and RAS under dynamic loading were investigated. Three asphalt mixes were designed and included in this research: a conventional mix with no RAP/RAS as a control, a mix with 35% RAP, and finally a mix with 35% RAP and 5% RAS. A conventional resonant column (RC) apparatus was retrofitted and used for testing the specimens in torsional mode. Testing was conducted at five temperatures ranging from 10 to 45°C. Damping ratios and moduli of the mixes were analyzed and compared to assess the effect of the recycled materials on dynamic properties of asphalt concrete. Results clearly show the impact of RAP and RAS in increasing the mix stiffness. The study also included uniaxial dynamic modulus (DM) testing of the control mix to compare the moduli measured at high frequencies through RC testing to those estimated by the DM master curve through extrapolation. Results show that the modulus obtained from RC testing correlates well with that extrapolated from DM tests. Results also indicate that the accuracy of such correlation is significantly increased once dependency of Poisson’s ratio on modulus is incorporated.
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Acknowledgments
Financial support for this study was provided by Mid-Atlantic University Transportation Center (MAUTC), Penn State Department of Civil and Environmental Engineering, and Northeast Center of Excellence for Pavement Technology (NECEPT). This support is gratefully acknowledged. The help and support by Mr. Scott Milander of NECEPT is also greatly appreciated.
References
AASHTO. (2008). “Mechanistic-empirical pavement design guide.” Washington, DC.
AASHTO. (2012a). “Standard practice for design considerations when using reclaimed asphalt shingles (RAS) in new hot mix asphalt (HMA).” AASHTO PP 53-09, Washington, DC.
AASHTO. (2012b). “Standard specification for use of reclaimed asphalt shingles (RAS) as an additive in hot mix asphalt (HMA).” AASHTO MP 15-09, Washington, DC.
AASHTO. (2013a). “Preparing and determining the density of hot mix asphalt (HMA) specimens by means of the superpave gyratory compactor.” AASHTO T 312-12, Washington, DC.
AASHTO. (2013b). “Specific gravity and absorption of coarse aggregate.” AASHTO T 84-13, Washington, DC.
AASHTO. (2013c). “Specific gravity and absorption of fine aggregate.” AASHTO T 85-13, Washington, DC.
AASHTO. (2013e). “Superpave volumetric design for hot mix asphalt (HMA).” AASHTO R 35-12, Washington, DC.
AASHTO. (2013d). “Superpave volumetric mix design.” AASHTO M 323-12, Washington, DC.
AASHTO. (2013f). “Theoretical maximum specific gravity (Gmm) and density of hot mix asphalt (HMA).” AASHTO T 209-12, Washington, DC.
AASHTO. (2015). “Standard method of test for determining dynamic modulus of hot mix asphalt concrete mixtures.” AASHTO T 342-11, Washington, DC.
Allen, D. L., and Deen, R. C. (1980). “Modulus and damping of asphaltic concrete using the resonant column.” Geotech. Test. J. ASTM, 3(4), 167–171.
Allen, J. C., and Stokoe, K. H. (1982). “Development of resonant column apparatus with anisotropic loading.”, Univ. of Texas at Austin, Austin, TX.
ASTM. (2007). “Standard test methods for modulus and damping of soils by resonant-column method.” ASTM D4015-07, West Conshohocken, PA.
Copeland, A. (2011). “Reclaimed asphalt pavement in asphalt mixtures: State of the practice.”, U.S. Dept. of Transportation, McLean, VA.
Islam, R., Faisal, H., and Tarefder, R. (2015). “Determining temperature and time dependent Poisson’s ratio of asphalt concrete using indirect tension test.” Fuel Intl. J., 146(1), 119–124.
Kassem, E., Grasley, Z., and Masad, E. (2013). “Viscoelastic Poisson’s ratio of asphalt mixtures.” Int. J. Geomech., 162–169.
Krivit, D. (2007). “Recycling tear-off asphalt shingles: Best practices guide.” Construction Materials Recycling Association, Washington, DC.
Maher, A., and Bennert, T. (2008). “Evaluation of Poisson’s ratio for use in the mechanistic empirical pavement design guide (MEPDG).”, Univ. of Rutgers Center for Advanced Infrastructure and Transportation (CAIT), Piscataway, NJ.
McGraw, J., Zofka, A., Krivit, D., Schroer, J., Olson, R., and Marasteanu, M. (2007). “Recycled asphalt shingles in hot mix asphalt.” J. Assoc. Asph. Paving Technol., 76, 235–274.
Newcomb, D. E., Brown, E. R., and Epps, J. A. (2007). “Designing HMA mixtures with high RAP content, a practical guide.” National Asphalt Pavement Association, Lanham, MD.
Solaimanian, M., Milander, S., Boz, I., and Stoffels, S. (2011). “Development of guidelines for usage of high percent RAP in warm-mix asphalt pavements.”, Thomas D. Larson Pennsylvania Transportation Institute, University Park, PA.
Tavassoti-Kheiry, P., Qiu, T., and Solaimanian, M. (2015). “Characterization of warm mix asphalt through resonant column testing.” J. Mater. Civ. Eng., 05015001.
Tavassoti-Kheiry, P., Solaimanian, M., and Qiu, T. (2014). “Nondestructive evaluation of warm mix asphalt through resonant column testing.”, Thomas D. Larson Pennsylvania Transportation Institute, University Park, PA.
Wang, J., and Zeng, X. (2006). “Influence of temperature and pressure on the dynamic properties of rubber-modified asphalt concrete.” J. Mater. Civ. Eng., 125–131.
Zhou, F., Button, J. W., and Epps, J. A. (2013). “Best practice for using RAS in HMA.”, Texas A&M Transportation Institute, College Station, TX.
Zhou, F., Estakhri, C., and Scullion, T. (2014). “Performance of RAP/RAS mixes and new direction.”, Texas A&M Transportation Institute, College Station, TX.
Zhou, F., Hongsheng, L., Hu, S., Button, J. W., and Epps, J. A. (2012). “Characterization and best use of recycled asphalt shingles in hot-mix asphalt.”, Texas A&M Transportation Institute, College Station, TX.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 11 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Nov 20, 2015
Accepted: Apr 18, 2016
Published online: Jun 22, 2016
Published in print: Nov 1, 2016
Discussion open until: Nov 22, 2016
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