Interpretation of aggregate volume fraction effects on fracture behavior of concrete

Burcu Akcay*, Ayda Safak Agar-Ozbek, Fikret Bayramov, Hakan Nuri Atahan, Cengiz Sengul, Mehmet Ali Tasdemir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


Fracture process zone has a strong effect on fracture energy particularly for concretes with coarse aggregates. In order to demonstrate this effect, four groups of concrete mixtures with various aggregate volume fractions were designed. Three point bending tests were applied on beam specimens with a single size but different notch size to obtain the boundary effect model based fracture energy. The results were evaluated to determine the effect of both aggregate volume fraction and notch size on fracture energy of concretes. In addition, meso-mechanical relations based on toughening mechanisms were employed in determining the fracture energy of concrete. The fracture energies obtained from the meso-mechanical approach and the boundary effect model were compared and found to be in good agreement.

Original languageEnglish
Pages (from-to)437-443
Number of pages7
JournalConstruction and Building Materials
Issue number1
Publication statusPublished - Mar 2012


The financial support of DPT (State Planning Organization, Project: 2002K120340) is greatly appreciated by the first and the sixth authors.

FundersFunder number
Devlet Planlama Örgütü2002K120340


    • Aggregate volume fraction
    • Fracture energy
    • Meso-mechanical modeling
    • Notch depth


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