Abstract
This study investigated for the aging quantity (AQ) modeling of asphalt in the mixes after various short-term aging (SA) treatments. AQ was defined as a mediator of SA level of binder in HMA mix as a function of temperature (T) and time (t) when the material source was limited. Three loose HMA mixes were aged artificially at two temperatures for four-time lengths: 160 and 180 °C for 1, 2, 4 and 8 h. The best-fit mathematical model was selected using exponential function to quantify the SA by T and t for an AQ model for predicting absolute viscosity (AV). It was found that the R2 between measured AV and estimated AV (EAV) by AQ was over 0.95. Therefore, it was concluded that the AQ, which was quantified by T and t, was possible to use to estimate AV of asphalt in HMA mixes under various SA.
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Acknowledgements
This study was supported by Kangwon National University (No. 52016 0138), and partially supported by PPI (Public Procurement of Innovation) Program To Solve Social Issues through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2019M3E8A1067629), using facilities of Institute of Advanced Construction Materials, Republic of Korea.
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Kim, S., Ahn, K., Kim, K.W. (2022). Proposal for Aging Quantity Model for Estimating Binder Aging Level of HMA Mix. In: Di Benedetto, H., Baaj, H., Chailleux, E., Tebaldi, G., Sauzéat, C., Mangiafico, S. (eds) Proceedings of the RILEM International Symposium on Bituminous Materials. ISBM 2020. RILEM Bookseries, vol 27. Springer, Cham. https://doi.org/10.1007/978-3-030-46455-4_192
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DOI: https://doi.org/10.1007/978-3-030-46455-4_192
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