Quantification of bituminous mortar ageing and its application in ravelling evaluation of porous asphalt wearing courses

Yuan Zhang, Zhen Leng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)

Abstract

This research is to quantify the ageing effect on the rheological characteristics of bituminous mortars and apply it in evaluation of the ravelling resistance of PA wearing courses. Bituminous mortars for two types of PA (one with base bitumen and the other with Styrene-Butadiene-Styrene (SBS) modified bitumen) were artificially aged in the laboratory. Cylindrical specimens were then prepared with the aged mortars and their complex shear modulus and shear fatigue life were characterized through the Dynamic Shear Rheometer (DSR) tests. Finite element models containing the structural geometries and material responses of the two PA wearing courses were created. Their stresses and strains under traffic loads were simulated and analysed. The experimental results showed that ageing had more influence on the complex shear modulus of the base mortar compared to the SBS mortar. However, its effects on fatigue resistance are opposite. The numerical modelling results indicated that after ageing, the ravelling resistance of the PA wearing course with base mortar decreased more.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalMaterials and Design
Volume119
DOIs
Publication statusPublished - 5 Apr 2017

Keywords

  • Ageing
  • Bituminous mortar
  • Dynamic shear rheometer
  • Finite element modelling
  • Porous asphalt

ASJC Scopus subject areas

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

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