An algorithm to estimate rational values of phase angles and moduli of asphalt mixtures

The objective of this study was to develop and evaluate an algorithm based on Fast Fourier Transform (FFT) that can calculate rational values of phase angle (ø) and moduli of the variants of asphalt mixtures for the data obtained from the different frequency sweep tests. ø and moduli for ten different asphalt mixtures resulting in over 690 data points collected from both USA and Sweden were computed using FFT. Theoretical observations revealed that there were significant differences for ø between FFT and other methods to the order of 10-50%; however, there was no difference in moduli estimates for any mix and was independent of the test. Precisely, the FFT method produced rational ø for mixtures that deviate from conventional mixture properties. Furthermore, statistical comparisons corroborated the predicted ø estimates indicative of significant differences between the analysis techniques; but, the moduli were unaffected by the analysis methods. The study successfully illustrated the FFT technique, a user-friendly analytical procedure that can obviate the errors in the rational estimation of the acutely sensitive viscoelastic parameters.

• Record URL:
  • https://doi.org/10.6135/ijprt.org.tw/2013.6(6).745
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/19966814
• Supplemental Notes:
  • Abstract used by permission of publisher.
• Authors:
  • Ahmed, Abubeker W
  • Biligiri, Krishna Prapoorna
  • Hakim, Hassan
• Publication Date: 2013-11

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 745-754
• Serial:
  • International Journal of Pavement Research and Technology
  • Volume: 6
  • Issue Number: 6
  • Publisher: Chinese Society of Pavement Engineering
  • ISSN: 1996-6814
  • EISSN: 1997-1400
  • Serial URL: http://www.ijprt.org.tw/index.php
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Algorithms; Asphalt mixtures; Dynamic modulus of elasticity; Fast Fourier transforms; Shear modulus; Viscoelasticity
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01505326
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 27 2014 11:03AM