Analytical modelling of visco-elastic behaviour of hot-mix asphalt

Show simple item record Anochie-Boateng, J.K. O'Connell, J.
dc.contributor.other Southern African Transport Conference (31st : 2012 : Pretoria, South Africa)
dc.contributor.other Minister of Transport, South Africa
dc.contributor.upauthor Maina, J.W. (James)
dc.contributor.upauthor Komba, Julius Joseph 2012-10-10T12:25:40Z 2012-10-10T12:25:40Z 2012-07-09 July 2012
dc.description This paper was transferred from the original CD ROM created for this conference. The material was published using Adobe Acrobat 10.1.0 Technology. The original CD ROM was produced by Document Transformation Technologies Postal Address: PO Box 560 Irene 0062 South Africa. Tel.: +27 12 667 2074 Fax: +27 12 667 2766 E-mail: nigel@doctech URL: en_US
dc.description.abstract Paper presented at the 31st Annual Southern African Transport Conference 9-12 July 2012 "Getting Southern Africa to Work", CSIR International Convention Centre, Pretoria, South Africa. en_US
dc.description.abstract As part of the revision of the South African Pavement Design Method (SAPDM), laboratory testing was conducted to obtain the dynamic (Complex) modulus |E*| of hot-mix asphalt (HMA) samples. Dynamic modulus gives an indication of linear visco-elastic (LVE) behaviour of HMA materials at different temperatures and loading frequencies; and is required for computation of stresses, strains and displacements in flexible pavement analysis and design. Laboratory tests to obtain dynamic modulus are normally conducted at limited range of temperatures and loading frequencies. In order to characterize HMA mixes for pavement analysis, sigmoidal function master curves are constructed at different temperatures and loading frequencies using a time-temperature superposition principle. Instead of using the sigmoidal function, this paper presents an alternative approach for characterising the LVE behaviour of HMA materials. This approach is based on the use of three rheological models, namely, Burger’s, Huet-Sayegh and the generalised 2S2P1D. The model parameters for all three rheological models were successfully determined. The master curves were developed for all HMA mixes studied. The Cole-Cole and the Black diagrams were determined. Based on the results presented in this paper, the Huet-Sayegh and the Generalised 2S2P1D models appear to predict the LVE behaviour of HMA mixes more effectively than the Burger’s model. en_US
dc.description.librarian dm2012 en
dc.format.extent 13 pages en_US
dc.format.medium PDF en_US
dc.identifier.isbn 978-1-920017-53-8
dc.language.iso en en_US
dc.publisher Document Transformation Technologies
dc.relation.ispartof SATC 2012
dc.rights University of Pretoria en_US
dc.subject South African Pavement Design Method en_US
dc.subject Hot-mix asphalt (HMA) en_US
dc.subject.lcsh Transportation
dc.subject.lcsh Transportation -- Africa
dc.subject.lcsh Transportation -- Southern Africa
dc.title Analytical modelling of visco-elastic behaviour of hot-mix asphalt en_US
dc.type Presentation en_US

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