Abstract
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.
Highlights
Warm mix asphalt (WMA) is gaining increased attention in the asphalt paving industry as an ecofriendly and sustainable technology
High moisture susceptibility, and low durability are generally seen as substantial drawbacks of warm mix asphalt (WMA), which can lead to inferior pavement performance, and increased maintenance costs
Rheological binder characteristics in terms of complex modulus and phase angle were studied based on Dynamic Shear Rheometer (DSR)
Summary
Warm mix asphalt (WMA) is gaining increased attention in the asphalt paving industry as an ecofriendly 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 nonrenewable fossil fuels, reduces energy consumption, and minimizes vapors and greenhouse gas emissions in the production, placement and conservation processes of asphalt mixtures. 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. In comparison to conventional hot mix asphalt technology, the warm mix asphalt (WMA) technology enables asphalt mix production at temperatures of approximately 50 °C lower, and it is an up-to-date solution for reducing energy consumption by 35%, greenhouse gas emissions by 20 to 35%, and harmful vapors such as polycyclic aromatic hydrocarbons significantly[4,5]. The warm mix asphalt technologies can be divided into three categories by use of synthetic or organic additives which affect the level of temperature reduction: chemical, organic additives, and foaming t echniques[5]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
