Understanding the short-term aging of warm mix asphalt using rolling thin film oven
Tóm tắt
Standard Rolling thin film oven (RTFO) test at 163°C for 85 minutes has been investigated and revised to represent the short-term aging of the warm mix asphalt (WMA) binder which is mixed and aged at lower temperature. Because of wide mixing temperature and variation in duration of storage and paving time, field short-term aging differs significantly. To simulate the reduced aging of WMA binders in the laboratory, series of RTFO tests were conducted on two binders at three different temperatures and for four aging periods. Short-term oven aging (STOA) of mix was performed for the same time duration at those three RTFO aging temperatures. A RTFO aging model was developed correlating the rheological properties of STOA mix. Following the aging model developed in this study aging temperature and duration can be selected for RTFO testing to simulate aging effect that a binder experiences in STOA of mix. It is observed that the change in aging index of binder follows a linear relationship with aging time, and the rate of change of the aging index changes linearly with temperature. This study also affirms that STOA of mix exhibits more sensitivity to temperature than that of RTFO aging of binder. Investigation of plant and laboratory mix depicts that very small portion of mix aging occurs during mixing phase however, main portion of short-term aging occur during the storage of plant mix or oven aging of laboratory mix. Because of wide mixing temperature RTFO aging test protocol need to be adjusted.
Từ khóa
Tài liệu tham khảo
R. Bonaquist, Mix Design Practices for Warm Mix Asphalt. NCHRP Report 691. Transp. Res. Board, Washington, D.C., USA, 2011.
A. Copeland, N. Gibson, M. Corrigan, A Cross-Cutting Comparison between Hot Mix Asphalt and Warm Mix Asphalt, 2nd International WMA Conference, St. Louis, MO, USA, 2011.
A. R. Abbas, M. Nazzal, S. Kaya, S. Akinbowale, B. Subedi, M. S. Arefin, L. Abu Qtaish, Effect of Aging on Foamed Warm Mix Asphalt Produced by Water Injection, J. Mater. Civ. Eng. 28 (11) (2016) https://doi.org/10.1061/(ASCE)MT.1943-5533.0001617
A. W. Ali, A. R. Abbas, M. Nazzal, D. Powers, Laboratory Evaluation of Foamed Warm Mix Asphalt, Inter. J. Pave. Res. Technol. 5 (2) (2012) 93–101.
M. R. M. Hasan, S. W. Goh, Z. You, Comparative study on the properties of WMA mixture using foamed admixture and free water system, Const. Build. Mater. 48 (2013) 45–50.
H. Malladi, D. Ayyala, A. A. Tayebali, N. P. Khosla, Laboratory evaluation of warm-mix asphalt mixtures for moisture and rutting susceptibility, J. Mater. Civ. Eng. 27 (5) (2014) https://doi.org/10.1061/(ASCE)MT.1943-5533.0001121, 04014162.
N. Bower, H. Wen, K. Willoughby, J. Weston, J. DeVol, Evaluation of the performance of warm mix asphalt in Washington state, Inter. J. Pave. Eng. 17 (5) (2014) 423–434.
J. A. D’Angelo, E. E. Harm, J. C. Bartoszek, G. L. Baumgardner, M. R. Corrigan, J. E. Cowsert, T. P. Harman, M. Jamshidi, H. W. Jones, H.W., D. E. Newcomb, B. D. Prowell, Warm-mix asphalt: European practice. FHWA-PL-08-007. Federal Highway Administration, Washington, D.C., USA, 2008.
J. Zhang, E. R. Brown, P. S. Kandhal, R. West, An overview of fundamental and simulative performance tests for Hot Mix Asphalt, J. ASTM Inter. 2 (5) (2005) 1–15.
S. Arafat, N. M. Wasiuddin, Evaluation of a Full-Scale Wheel Load Tester to Determine the Rutting and Moisture Susceptibility of Asphalt Mix in Laboratory, Inter. Confer. Transp. Develop., 2018 https://doi.org/10.1061/9780784481554.032.
W. D. Fernández-Gómez, H. R. Quintana, F. R. Lizcano, A review of asphalt and asphalt mixture aging, Ingenieria e investigacion 33(1) (2013) 5–12.
R. B. McGennis, R. M. Anderson, T. W. Kennedy, M. Solaimanian, Background of Superpave asphalt mixture design and analysis. FHWA-SA-95-003. Federal Highway Administration, Washington, D.C., USA, 1995
A. Shalaby, Modelling short-term aging of asphalt binders using the rolling thin film oven test, Can. J. Civ. Eng. 29 (1) (2002) 135–144.
B. Hofko, A. C. Falchetto, J. Grenfell, L. Huber, X. Lu, L. Porot, L. D. Poulikakos, Z. You, Effect of short-term ageing temperature on bitumen properties, Road. Mater. Pave. Des. 18 (sup2) (2017) 108–117.
M. Alavi, X. Lau, D. Jones, J. Harvey, Modification of the Rolling Thin Film Oven (RTFO) Test for Realistic Short-term Aging of Asphalt Rubber Binders, 52nd Petersen Asphalt Research Conference, Laramie, WY, USA, 2015.
J. Jia, X. Zhang, Modification of the rolling thin film oven test for modified asphalt, In Proceedings of the 24th Southern African Transport Conference (SATC), 2005
A. E. Martin, E. Arambula, F. Yin, L. G. Cucalon, A. Chowdhury, R. Lytton, J. Epps, C. Estakhri, E. S. Park, Evaluation of the moisture susceptibility of WMA technologies. NCHRP Report 763. Transportation Research Board, Washington D.C., USA, 2014.
S. J. Lee, S. N. Amirkhanian, K. Shatanawi, K. W. Kim, Short-term aging characterization of asphalt binders using gel permeation chromatography and selected Superpave binder tests, Const. Build. Mat. 22 (11) (2008) 2220–2227.
Louisiana Department of Transportation and Development (LADOTD), Louisiana standard specifications for roads and bridges, Louisiana, USA, 2006.
T. Gandhi, Effects of warm asphalt additives on asphalt binder and mixture properties, (Doctoral dissertation), Clemson University, SC, USA, 2008.