Abstract
For the first time, this study assessed the rheological and physical properties of asphalt binder combined with nano bauxite powder (NBP) derived from raw Malaysian bauxite. The physical properties were evaluated via conventional tests like softening point, penetration, rotational viscosity and ductility, while the impacts of NBP modified asphalt binders on rheological properties were assessed via dynamic shear rheometer (DSR). In addition, the morphology (nanoparticles size and shape) of the NBP was studied using transmission electron microscopy (TEM). The results show that using of NBP as a modifier increases the hardness of the asphalt binder and improves its physical properties. Compared with unmodified asphalt binder, there was ~11% enhancement in softening point and ~16% decrease in penetration of modified asphalt binders. In a similar manner, compared with base asphalt binder, there was increase in G* and G*/sin δ values for the modified asphalt binders and decrease in δ values, which suggests that there was an enhancement in the resistant property of the modified asphalt binders to permanent deformation (rutting). Therefore, to alter asphalt binder’s properties, NBP is considered as an optimum additive.
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Elghatas, H.M.A., Aman, M.Y.B., Ali, S.I.A., Ali, A.S.B. (2019). The Evaluation of the Performance of Nano Bauxite Powder (NBP) Modified Asphalt Binder. In: Awang, M., Isa, M. (eds) The Advances in Civil Engineering Materials. ICACE 2018. Lecture Notes in Civil Engineering , vol 19. Springer, Singapore. https://doi.org/10.1007/978-981-13-2511-3_5
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DOI: https://doi.org/10.1007/978-981-13-2511-3_5
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