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Rheological, physicochemical, and microstructural properties of asphalt binder modified by fumed silica nanoparticles
Scientific Reports, Volume: 11, Issue: 1
Swansea University Authors: Sajad Kiani, Andrew Barron
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DOI (Published version): 10.1038/s41598-021-90620-w
Warm mix asphalt (WMA) is gaining increased attention in the asphalt paving industry as an eco-friendly and sustainable technology. WMA technologies are favorable in producing asphalt mixtures at temperatures 20–60 °C lower in comparison to conventional hot mix asphalt. This saves non-renewable foss...
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Springer Science and Business Media LLC
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Warm mix asphalt (WMA) is gaining increased attention in the asphalt paving industry as an eco-friendly and sustainable technology. WMA technologies are favorable in producing asphalt mixtures at temperatures 20–60 °C lower in comparison to conventional hot mix asphalt. This saves non-renewable fossil fuels, reduces energy consumption, and minimizes vapors and greenhouse gas emissions in the production, placement and conservation processes of asphalt mixtures. At the same time, this temperature reduction must not reduce the performance of asphalt pavements in-field. Low aging resistance, high moisture susceptibility, and low durability are generally seen as substantial drawbacks of WMA, which can lead to inferior pavement performance, and increased maintenance costs. This is partly due to the fact that low production temperature may increase the amount of water molecules trapped in the asphalt mixture. As a potential remedy, here we use fumed silica nanoparticles (FSN) have shown excellent potential in enhancing moisture and aging susceptibility of asphalt binders. In this study, asphalt binder modification by means of FSN was investigated, considering the effects of short-term and long-term aging on the rheological, thermal, and microstructural binder properties. This research paves the way for optimizing WMA by nanoparticles to present enhanced green asphalt technology.
Civil engineering, Nanoparticle,s, Nanoscale materials, Nanoscience and technology
Faculty of Science and Engineering
The authors gratefully acknowledge financial support from the German Research Foundation (DFG). Part of Figures 1 and 11 were created with BioRender.com (under license number 307CB98D-0001 BioRender). Additional support is provided by the Reducing Industrial Carbon Emissions (RICE) operations funded by the Welsh European Funding Office (WEFO) through the Welsh Government. Open Access funding enabled and organized by Projekt DEAL.