Investigating the Performance of Nano-Modified Asphalt Binders Incorporated with Warm Mix Additives
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 11
Abstract
The current investigation presents a laboratory assessment of the physical and rheological properties of control and nanosilica-modified asphalt binders incorporated with warm mix additives (WMAs). Nanosilica can be produced from rice husk and silica fumes and therefore is a cost-effective and environment-friendly asphalt modifier. Fisher-Tropsch wax (FT wax) and organosilane additive were the two WMAs utilized in the current study. The study utilized three concentrations for each additive. Rutting evaluation of the asphalt binders was done through Superpave rutting and the multiple stress creep and recovery (MSCR) test. The fatigue performance was evaluated utilizing the Superpave fatigue test and the linear amplitude sweep (LAS) test. The results of this study revealed that adding WMAs decreased the viscosity of the control and nanosilica-modified asphalt binders. The asphalt binder showed an improved elevated temperature performance after the incorporation of WMA additives. The incorporation of WMA additives enhanced the resistance against fatigue cracking as revealed by the LAS test. The resistance to aging was enhanced after the addition of warm mix additives.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
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Journal of Materials in Civil Engineering
Volume 33 • Issue 11 • November 2021
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© 2021 American Society of Civil Engineers.
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Received: Oct 26, 2020
Accepted: Mar 19, 2021
Published online: Sep 6, 2021
Published in print: Nov 1, 2021
Discussion open until: Feb 6, 2022
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