Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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 (Herausgeber:in) / Baaj, Hassan (Herausgeber:in) / Chailleux, Emmanuel (Herausgeber:in) / Tebaldi, Gabriele (Herausgeber:in) / Sauzéat, Cédric (Herausgeber:in) / Mangiafico, Salvatore (Herausgeber:in) / Rahbar-Rastegar, Reyhaneh (Autor:in) / Pouranian, M. Reza (Autor:in) / Batioja-Alvarez, Dario (Autor:in) / Notani, Mohammad Ali (Autor:in)
RILEM International Symposium on Bituminous Materials ; 2020 ; Lyon, France
Proceedings of the RILEM International Symposium on Bituminous Materials ; Kapitel: 217 ; 1711-1717
RILEM Bookseries ; 27
26.09.2021
7 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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