Nonlinear rheological performance characterization of styrene-butadiene-styrene and crumb rubber composite modified bitumen using large amplitude oscillatory shear tests

You Wu, Peng Huang, Yunhong Yu, Chenguang Shi, Huimin Chen, Houzhi Wang, Jun Yang, Zhen Leng, Wei Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

The crumb rubber (CR) recycled from waste tires can improve the mechanical properties of bitumen effectively. For the widely used modified bitumen today, it could work in nonlinear regime in many occasions. This study focuses on the nonlinear properties of styrene-butadiene-styrene (SBS) and CR composite modified bitumen (CMB) by analyzing the results of stress-controlled large amplitude oscillatory shear (LAOS) tests. The results show that the nonlinearity of SBS/CR CMB was significant under low load frequency, high temperature and high stress level. Lissajous curves at these conditions are distorted obviously due to the presence of higher-order harmonics. By analyzing the geometry parameters of Lissajous curves, it can be concluded that the incorporation of CR has a positive influence on the nonlinear properties of bitumen, which effectively improve the stress bearing capacity of bitumen. However, the high-order harmonic analysis indicates that improving the CR content simply does not always improve the performance of bitumen. Besides, the nonlinearity of SBS/CR CMB with lower CR content is similar to that of SBS modified bitumen through the value of I3/I1 and intrinsic nonlinear parameter Q, thus there are two critical CR contents for the prospect of modifying the nonlinearity of bitumen.

Original languageEnglish
Article number135712
JournalJournal of Cleaner Production
Volume385
DOIs
Publication statusPublished - 20 Jan 2023

Keywords

  • Fourier transform rheology
  • Lissajous curve
  • Nonlinear viscoelastic property
  • SBS/CR CMB
  • Stress-controlled mode LAOS test
  • Stress/strain decomposition

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • General Environmental Science
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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