Characterization of viscoplastic yielding of asphalt concrete

Yuqing Zhang*, Rong Luo, Robert L. Lytton

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A temperature and strain rate dependent yield surface model was proposed to characterize the viscoplastic yielding of asphalt concrete. Laboratory tests were conducted on specimens that have two binders, two air void contents, and three aging periods. Strain decomposition was performed to obtain viscoplastic strain and stress-pseudostrain curves were constructed to determine the model parameters accurately and efficiently. Results indicate that a stiffer asphalt concrete has greater cohesion and strain hardening amplitude, both of which decline as temperature increases or strain rate decreases. The temperature and strain rate factors of the yield surface can be accurately determined solely by the peak stress of the strength tests.

Original languageEnglish
Pages (from-to)671-679
Number of pages9
JournalConstruction and Building Materials
Volume47
Early online date10 Jun 2013
DOIs
Publication statusPublished - Oct 2013

Keywords

  • asphalt concrete
  • pseudostrain
  • strain rate
  • temperature
  • viscoplastic yield surface
  • yield strength

Fingerprint Dive into the research topics of 'Characterization of viscoplastic yielding of asphalt concrete'. Together they form a unique fingerprint.

  • Cite this