Investigation of size effect in asphalt mixture fracture testing at low temperature

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The Semi-Circular Bending (SCB) fracture test is commonly used to evaluate the low temperature fracture properties of asphalt mixtures. The present work investigates the presence of a size effect in SCB fracture testing of asphalt mixtures. Un-notched and notched geometrically similar SCB specimens of various sizes are tested at -24°C loaded by crack-mouth opening displacement (CMOD). The effect of specimen size on the nominal strength is investigated through the well-established size effect theories and conclusions are drawn regarding the fracture behaviour of mixtures at low temperature.

Original languageEnglish (US)
Pages (from-to)88-101
Number of pages14
JournalRoad Materials and Pavement Design
Issue numberSUPPL. 1
StatePublished - Jun 2012


  • Asphalt mixture
  • Fracture energy
  • Fracture process zone
  • Nominal strength
  • Semi-Circular Bending (SCB)
  • Size effect


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