Damage evaluation of poro-elastic road surface with low polyurethane content

Gongyun Liao, Laura Soares, Hao Wang, Kongqing Qi

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This study aims to evaluate the damage evolution of poro-elastic road surface with low polyurethane content (PERS-LPC) subjected to cyclic loading with two new damage indicators. A cyclic loading test and dynamic modulus test were conducted on nine different PERS-LPC specimens to develop stress-strain hysteresis curves. The variations of curve perimeter (ΔP) and the enclosed area during the unloading period (ΔA) were proposed to evaluate damage evolution of PERS-LPC specimen as compared with the existing damage indicators. X-ray computed tomography scanning images were obtained to verify the damage evolution within PERS-LPC specimens. The results showed that damage evolution of the PERS-LPC specimen could be captured by the proposed ΔP and ΔA indicators. The PERS-LPC mixture with a low amount of rubber granule (25 %) and polyurethane (4 % by total mass of rubber and aggregate) and 20 % air void exhibited good damage resistance. The study findings can be used to optimize the composition of low-cost PERS-LPC mixtures for durable design.

Original languageEnglish (US)
JournalJournal of Testing and Evaluation
Volume49
Issue number1
DOIs
StatePublished - Oct 14 2020

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Damage
  • Evaluation
  • Hysteresis curve
  • Polyurethane
  • Poro-elastic road surface

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