Novel approach for characterization of unbound materials

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Journal titleTransportation Research Record
Pages3846; # of pages: 9
Subjectunbound pavement materials characterization, resilient modulus, permanent deformation, cyclic plasticity, hardening, M,-PD test; Roads
AbstractThe current inclination towards establishing a mechanistic pavement analysis scheme to support the rehabilitation design will require the adoption of mechanical materials properties. Mechanistic properties are needed for establishing the material-mechanics link, which represents the most effective approach for accurately predicting the response of road structures and their performance. Physical characteristics served early design practices with a common understanding among users that a more robust approach is needed to effectively address rehabilitation design requirements. This paper discusses current attempts to improve material characterization based on the outcome of mechanical tests focusing on unbound materials. The paper concluded that simplifying assumptions built in the proposed testing schemes and the manner that these properties are determined overlooked other critical behaviour indicators. Results of field and laboratory investigations highlight the need for capturing permanent deformation and the paper describes a more effective characterization technique for unbound material. Following this new approach, conventional resilient modulus and permanent deformation determinations were examined for a variety of native soils and processed material (crushed stones). Implementation of the new characterization technique in analytical models is also discussed.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47023
NPARC number20377849
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Record identifierd9b3459f-3a95-4710-b224-a5cd135f0816
Record created2012-07-24
Record modified2016-05-09
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