Effectiveness of predictive models for estimating asphalt concrete complex modulus

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Conference6th Transportation Specialty Conference: 05 May 2005, Toronto, Ontario
Pages1881 - 188-10
AbstractThe complex modulus has been identified as a suitable mechanistic characterisation technique for asphalt concrete because of its ability to capture the visco-elastic response of the material and has since been incorporated in the new AASHTO 2002 road design guide. The pavement research group of NRC developed a laboratory testing protocol involving a wide range of loading frequencies and temperature conditions to satisfy requirements of a variety of analytical models. The high cost of the test motivated developers of the ASSHTO guide to implement predictive models as an alternative to actual laboratory testing. This paper discusses results of the tests performed at NRC on typical asphalt concrete mixes and calls for establishing a material library for Canadian users of the ASSHTO guide. The predictive equation came short of accurately estimating laboratory measured dynamic modulus. The generic material properties listed in the library could be used instead of the ASSHTO predictive equation.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47683
NPARC number20377771
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Record identifier22883f39-5070-45af-a9c5-7cc1f126ba44
Record created2012-07-24
Record modified2016-05-09
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