A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Different Aggregate Gradations on Rutting Performance of Asphalt Mixtures for UAE Roadways
Rutting or Permanent deformation is one of the primary distresses that occur in asphalt pavements. Many researchers showed that about 55 to 80% of rutting occurred in the surface layer of asphalt pavement. Since this layer contains 90–95% aggregates by weight, studying the properties of the aggregate component becomes very crucial. Gradation is one of the important characteristics of the aggregates affecting the performance of hot-mix asphalt (HMA) particularly against rutting. The skeleton of the internal aggregate structure is highly affected by gradation, which directly impacts the rutting resistance of the asphalt mixture. The main objectives of this research study are to evaluate the effect of aggregate gradation type including GAP-graded, FHWA gradation, UAE gradation, and gradation by Bailey method on the rutting performance of HMA for the UAE’s hot climate. A total of 48 Superpave gyratory-compacted specimens of different aggregate gradations were prepared and tested in the mixture design stage to determine the design asphalt binder content for each mixture/gradation type. Another set of Superpave gyratory-compacted (SGC) specimens were also prepared using the design asphalt binder content obtained for each asphalt mixture/gradation for the performance testing phase. The test results and analysis provided a full picture of the performance and behavior of asphalt mixtures using different aggregate gradations. The results shows that the GAP and the Bailey gradations have the highest rutting resistance in both Dynamic modulus and flow number tests.
Effect of Different Aggregate Gradations on Rutting Performance of Asphalt Mixtures for UAE Roadways
Rutting or Permanent deformation is one of the primary distresses that occur in asphalt pavements. Many researchers showed that about 55 to 80% of rutting occurred in the surface layer of asphalt pavement. Since this layer contains 90–95% aggregates by weight, studying the properties of the aggregate component becomes very crucial. Gradation is one of the important characteristics of the aggregates affecting the performance of hot-mix asphalt (HMA) particularly against rutting. The skeleton of the internal aggregate structure is highly affected by gradation, which directly impacts the rutting resistance of the asphalt mixture. The main objectives of this research study are to evaluate the effect of aggregate gradation type including GAP-graded, FHWA gradation, UAE gradation, and gradation by Bailey method on the rutting performance of HMA for the UAE’s hot climate. A total of 48 Superpave gyratory-compacted specimens of different aggregate gradations were prepared and tested in the mixture design stage to determine the design asphalt binder content for each mixture/gradation type. Another set of Superpave gyratory-compacted (SGC) specimens were also prepared using the design asphalt binder content obtained for each asphalt mixture/gradation for the performance testing phase. The test results and analysis provided a full picture of the performance and behavior of asphalt mixtures using different aggregate gradations. The results shows that the GAP and the Bailey gradations have the highest rutting resistance in both Dynamic modulus and flow number tests.
Effect of Different Aggregate Gradations on Rutting Performance of Asphalt Mixtures for UAE Roadways
Sustain. Civil Infrastruct.
Akhnoukh, Amin (editor) / Kaloush, Kamil (editor) / Elabyad, Magid (editor) / Halleman, Brendan (editor) / Erian, Nihal (editor) / Enmon II, Samuel (editor) / Henry, Cherylyn (editor) / Almbaidheen, Khalil (author) / Al-Khateeb, Ghazi (author) / Ziada, Waleed (author)
International Road Federation World Meeting & Exhibition ; 2021 ; Dubai, United Arab Emirates
2022-04-21
12 pages
Article/Chapter (Book)
Electronic Resource
English
Aggregate gradation , GAP gradation , Rutting , Dynamic modulus , Flow number , Bailey method , Mixture design , Superpave gyratory compactor Engineering , Transportation Technology and Traffic Engineering , Sustainable Development , Building Construction and Design , Building Materials , Earth and Environmental Science
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