A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Superior performance benefits of multigrade bitumen asphalt with recycled asphalt pavement additive
Highlights Four-point bending testing was conducted on multigrade asphalt beams with and without RAP to examine the fatigue and modulus performance under various temperatures. Better understanding of the materials will lead to a reduction in the use of virgin aggregate. Asphalt is very temperature dependant and multigrade offers a reliable solution that can lead to a reduction of overall pavement thickness. The current method of adopting the Shell relationship is not reliable. CIRCLY parameters determined for these mixes and can be adopted by industry.
Abstract The implementation of recycled asphalt pavement (RAP) in new pavements is crucial for future sustainability, but the impact of the recycled material on the new roads properties must first be investigated to ensure future pavement performance. The introduction of RAP to high performing asphalt mixes, such as multigrade asphalt (asphalt utilising multigrade bitumen), needs to be investigated to safe guard against possible detrimental effects of the RAP. Extensive laboratory testing was conducted on multigrade asphalt beams under a range of temperatures and loading conditions. Testing has found that multigrade bitumen does perform better than expected during laboratory testing compared to conventional asphalt and the current industry standard of utilising the Shell 1978 fatigue curve for asphalt. The addition of RAP had beneficial effects on the asphalt pavements at higher temperatures (30 °C).
Superior performance benefits of multigrade bitumen asphalt with recycled asphalt pavement additive
Highlights Four-point bending testing was conducted on multigrade asphalt beams with and without RAP to examine the fatigue and modulus performance under various temperatures. Better understanding of the materials will lead to a reduction in the use of virgin aggregate. Asphalt is very temperature dependant and multigrade offers a reliable solution that can lead to a reduction of overall pavement thickness. The current method of adopting the Shell relationship is not reliable. CIRCLY parameters determined for these mixes and can be adopted by industry.
Abstract The implementation of recycled asphalt pavement (RAP) in new pavements is crucial for future sustainability, but the impact of the recycled material on the new roads properties must first be investigated to ensure future pavement performance. The introduction of RAP to high performing asphalt mixes, such as multigrade asphalt (asphalt utilising multigrade bitumen), needs to be investigated to safe guard against possible detrimental effects of the RAP. Extensive laboratory testing was conducted on multigrade asphalt beams under a range of temperatures and loading conditions. Testing has found that multigrade bitumen does perform better than expected during laboratory testing compared to conventional asphalt and the current industry standard of utilising the Shell 1978 fatigue curve for asphalt. The addition of RAP had beneficial effects on the asphalt pavements at higher temperatures (30 °C).
Superior performance benefits of multigrade bitumen asphalt with recycled asphalt pavement additive
Clark, Brody R. (author) / Gallage, Chaminda (author)
2019-09-13
Article (Journal)
Electronic Resource
English
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