The impact of fine aggregate characteristics on asphalt concrete pavement design life

The development of the Mechanistic-Empirical Pavement Design Guide (MEPDG) provides an opportunity to simulate the performance of pavements. This paper considers the impact of fine aggregate on the predicted performances of pavements by simulating the performance differences between pavement mixes p...

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Bibliographic Details
Published in:The international journal of pavement engineering 2011-04, Vol.12 (2), p.101-109
Main Authors: Breakah, Tamer M., Bausano, Jason P., Williams, R. Christopher, Vitton, Stan
Format: Article
Language:English
Subjects:
aggregate gradation
aggregate source
Aggregates
Asphalt
asphalt concrete
Asphalt pavements
Civil engineering
Concrete pavements
Dolomite
Dynamic tests
fine aggregate angularity
Gravel
MEPDG
Pavement design
pavement design life
Pavements
Performance evaluation
Sands
Simulation
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Summary:The development of the Mechanistic-Empirical Pavement Design Guide (MEPDG) provides an opportunity to simulate the performance of pavements. This paper considers the impact of fine aggregate on the predicted performances of pavements by simulating the performance differences between pavement mixes prepared with different sources of fine aggregate with different gradations using the MEPDG. A natural and four manufactured sands from parent material consisting of dolomite, limestone, traprock (TR) and a glacial gravel (GG), and five gradations were utilised in this study. This resulted in 19 different sand/stone combinations being tested for dynamic modulus to enable level 1 analysis in the MEPDG. The results indicate that the fine aggregate angularity (FAA) test adequately ranks aggregates from the same source, but does not appropriately rank aggregates from different sources. TR and GG were identified as the best performers within the investigated aggregate sources and that the FAA, aggregate source and gradation are not significant in determining mixture performance.
ISSN:1029-8436
1477-268X
DOI:10.1080/10298430903578937