On the resilient behaviour of unbound aggregates

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ConferenceProceedings of 5th International Symposuim on Unbound Aggregates in Road Construction: 21 June 2000, Nottingham, England
Pages2934; # of pages: 6
Subjectmechanical response, unbound aggregates, resilient modulus, discrete element modelling; Roads
AbstractThis paper explores the potential of the resilient modulus test to characterize the mechanical response of unbound aggregates. The paper is divided into two sections. The first section presents the results of a laboratory study aimed at identifying the significant factors that affect the resilient modulus of granular materials. Using the principles of experimental factorial design, four parameters, namely: deviator stress, confining pressure, moisture content and material dry density were included in the investigation. Resilient modulus test results showed that the effect of the deviator stress was the most significant followed by the effect of moisture content. Other factors appear to have little or no effect at all on the modulus parameter. In the second section of the paper, an attempt is made to interpret the material micro behaviour at the grain level with its macro response measured by the resilient modulus parameter. This part of the study was carried out using the discrete element modelling technique. Theoretical values of the resilient modulus obtained satisfactorily agree with laboratory determined moduli. These results confirm the suitability of the resilient modulus test to describe the mechanical response of unbound aggregate materials to traffic and environmental stimuli.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number43931
NPARC number20331365
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Record identifier4ad8aad2-d650-4c63-9119-583c99222d55
Record created2012-07-18
Record modified2016-05-09
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