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Published in:
2022 | OriginalPaper | Chapter
Proposal for Aging Quantity Model for Estimating Binder Aging Level of HMA Mix
Authors : Sungun Kim, Kyongae Ahn, Kwang W. Kim
Published in: Proceedings of the RILEM International Symposium on Bituminous Materials
Publisher: Springer International Publishing
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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.