Virtual Uniaxial Creep Testing Method of Asphalt Mixture

This paper presents a virtual uniaxial creep testing method. Different gradations were selected, and the X-ray CT was used to scan the asphalt specimens non-destructively in order to predict the deformation of asphalt mixture and verify the feasibility of the proposed method. Moreover, the finely distributed information of asphalt mixture microstructure, including aggregates, sand mastic and air voids, were captured. The three-dimensional (3D) virtual specimen reflecting the real microscale distribution of asphalt mixture was created according to the developed 3D reconstruction theory and algorithm. Considering the Burgers visco-elastic consecutive relations of sand mastic, the visco-elastic state of sand mastic was transformed to the Prony parameters identified by finite element by using the Boltzmann superposition principle and Laplace theory. Finally, the virtual uniaxial creep testing was conducted. Results show that the predicted deformations agree well with the testing results. The proposed virtual uniaxial creep method accurately reflects different deformations for different gradations, thus overcoming the defects of conventional numerical simulation based on homogeneous specimens.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01600410
  • Record Type: Publication
  • Files: TRIS, ASCE
  • Created Date: May 10 2016 3:02PM