A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Superpave 5: Improving Asphalt Mixture Performance
The traditional Superpave mixture design method selects optimum asphalt binder content to yield 4% air voids content in asphalt mixtures, while anticipating approximately 7% air voids content at the time of construction. This approach can produce mixtures with high ageing and moisture damage potential. A recently developed mixture design method named “Superpave 5” is nearly identical to the traditional Superpave mixture design method, except that optimum binder content is selected to yield 5% air voids content with the expectation that when field compacted, the mixture will also yield 5% air voids content. The objective of this study is to assess the viscoelastic, cracking, and rutting properties of Superpave 5 mixtures and compare them with a traditionally designed Superpave mixture. Four plant-mixed Superpave 5 and one laboratory-mixed traditional Superpave mixtures were evaluated using complex modulus testing, the Illinois Flexibility Test, and the Hamburg Wheel Track Test. The results indicate that Superpave 5 mixtures exhibit improved laboratory rutting performance. However, the Flexibility Index does not seem to be an appropriate cracking indicator, as it appears unable to distinguish between air voids contents.
Superpave 5: Improving Asphalt Mixture Performance
The traditional Superpave mixture design method selects optimum asphalt binder content to yield 4% air voids content in asphalt mixtures, while anticipating approximately 7% air voids content at the time of construction. This approach can produce mixtures with high ageing and moisture damage potential. A recently developed mixture design method named “Superpave 5” is nearly identical to the traditional Superpave mixture design method, except that optimum binder content is selected to yield 5% air voids content with the expectation that when field compacted, the mixture will also yield 5% air voids content. The objective of this study is to assess the viscoelastic, cracking, and rutting properties of Superpave 5 mixtures and compare them with a traditionally designed Superpave mixture. Four plant-mixed Superpave 5 and one laboratory-mixed traditional Superpave mixtures were evaluated using complex modulus testing, the Illinois Flexibility Test, and the Hamburg Wheel Track Test. The results indicate that Superpave 5 mixtures exhibit improved laboratory rutting performance. However, the Flexibility Index does not seem to be an appropriate cracking indicator, as it appears unable to distinguish between air voids contents.
Superpave 5: Improving Asphalt Mixture Performance
RILEM Bookseries
Di Benedetto, Hervé (editor) / Baaj, Hassan (editor) / Chailleux, Emmanuel (editor) / Tebaldi, Gabriele (editor) / Sauzéat, Cédric (editor) / Mangiafico, Salvatore (editor) / Rahbar-Rastegar, Reyhaneh (author) / Pouranian, M. Reza (author) / Batioja-Alvarez, Dario (author) / Notani, Mohammad Ali (author)
RILEM International Symposium on Bituminous Materials ; 2020 ; Lyon, France
Proceedings of the RILEM International Symposium on Bituminous Materials ; Chapter: 217 ; 1711-1717
RILEM Bookseries ; 27
2021-09-26
7 pages
Article/Chapter (Book)
Electronic Resource
English
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