Effect of Specimen Size on Fracture Energy and Softening Curve of Concrete: Part I. Experiments and Fracture Energy

The fracture energy of concrete G-sub-F is a fundamental fracture parameter, presenting the concrete's cracking resistance. However, because of the experimentally observed size dependency, it remains controversial as to whether the fracture energy can be considered as a material property. In this paper, a 3-point bend test for a notched beam and a wedge splitting test were performed with different size specimens for 10 different concrete mixes in order to study the effect of specimen size and geometry on the fracture energy. A data processing method was proposed for averaging the test results of companion specimens, and the fracture energy was calculated from the averaged results. From a comparison of the fracture energies, it was found that the fracture energy increases with an increase in specimen size in both the beam and wedge splitting tests.


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  • Accession Number: 01105326
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 18 2008 12:59PM