Abstract
The adhesion between asphalt binder and aggregate is one of the most important properties of asphalt mixture, and the surface energy is a widely used parameter to evaluate the adhesion property. The conventional method of calculating the surface energy is by measuring the contact angle between the reference sample and bituminous materials, then the Young’s equation was conducted for the calculation procedure. However, this is a time consumed method. In this paper, a new procedure was proposed combined with the Atomic Force Microscope (AFM) experimental results, two calculation methods, Johnson-Kendall-Roberts (JKR) and DMT model, and the Fowke theory was conducted for this purpose; the conventional method was used as the reference to evaluate and compare the two methods. Results showed that the JKR(S) model has a better result compared with the DMT model, and the experimental procedure is more reliable, hence, this procedure is suggested as a new method to calculate the surface energy of asphalt binder.
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Chang, R., Yan, E., Xu, J., Wang, G. (2019). Investigation of the Calculation Modeling of Asphalt Binder Surface Energy Based on the Atomic Force Microscope (AFM). In: Poulikakos, L., Cannone Falchetto, A., Wistuba, M., Hofko, B., Porot, L., Di Benedetto, H. (eds) RILEM 252-CMB Symposium. RILEM 252-CMB 2018. RILEM Bookseries, vol 20. Springer, Cham. https://doi.org/10.1007/978-3-030-00476-7_37
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DOI: https://doi.org/10.1007/978-3-030-00476-7_37
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