DEFORMATION OF MORTAR AROUND AN AGGREGATE IN A TRIAL SPECIMEN UNDER COMPRESSIVE STRESS USING X RAY CT AND DVC — ICTMS Committee Dep of Applied Maths Australian National University
  1. Schedule
  2. Theme 3: Construction materials e.g. timber & concrete
  3. DEFORMATION OF MORTAR AROUND AN AGGREGATE IN A TRIAL SPECIMEN UNDER COMPRESSIVE STRESS USING X RAY CT AND DVC

DEFORMATION OF MORTAR AROUND AN AGGREGATE IN A TRIAL SPECIMEN UNDER COMPRESSIVE STRESS USING X RAY CT AND DVC (152)

Takayuki Fumoto 1 , Stephen A Hall 2
  1. Department of Civil and Environment engineering, Kindai University, Higashi-osaka, OSAKA, Japan
  2. Department of Solid mechanics, Lund University, Lund, Sweden

In this study, as the first step towards understanding the behavior of the mortar around an aggregate, comparisons have been made between the strain distributions, just prior to sample fracture, around different aggregates in mortar specimens containing just a single aggregate particle. We calculated the displacement field inside each specimen by Digital Volume Correlation (DVC) analysis of tomography images acquired first before loading and the second under maximum loading. The DVC was performed with the program “TomoWarp2”. The study showed that if a particle is inserted into the mortar, the shrinkage strains are inhibited and the shear strains occur around the surface of particles. The regions of elevated shear strain become cracks at sample fracture. The region of elevated shear strain is larger for softer particles.

Full Paper