Observed deviations from isotropic linear viscoelastic behavior of asphalt concrete through modal testing
2014 (English)In: Construction and Building Materials, ISSN 0950-0618, Vol. 66, 63-71 p.Article in journal (Refereed) Published
The complex Young's moduli, complex shear moduli and complex Poisson's ratio of a beam shaped asphalt concrete specimen have been characterized through low strain (similar to 10(-7)) frequency response function measurements. The assumption of isotropic linear viscoelastic behavior has been applied and investigated. The results indicate that the asphalt concrete specimen agree with the isotropic linear viscoelastic assumption at low temperatures and high frequencies (>10 kHz at 0 degrees C), but at higher temperatures and lower frequencies, discrepancies from isotropic linear behavior are shown. The dynamic shear moduli calculated from the estimated Young's moduli and Poisson's ratio of the asphalt concrete specimen are overestimated for frequencies and temperatures often applied to pavements.
Place, publisher, year, edition, pages
2014. Vol. 66, 63-71 p.
Asphalt concrete, Complex modulus, Complex shear modulus, Complex Poisson's ratio, Modal testing, Frequency response functions
IdentifiersURN: urn:nbn:se:kth:diva-151326DOI: 10.1016/j.conbuildmat.2014.05.077ISI: 000340688200008ScopusID: 2-s2.0-84902202910OAI: oai:DiVA.org:kth-151326DiVA: diva2:748060
QC 201409182014-09-182014-09-182014-11-17Bibliographically approved