TY - JOUR
T1 - Interpretation of aggregate volume fraction effects on fracture behavior of concrete
AU - Akcay, Burcu
AU - Agar-Ozbek, Ayda Safak
AU - Bayramov, Fikret
AU - Atahan, Hakan Nuri
AU - Sengul, Cengiz
AU - Tasdemir, Mehmet Ali
PY - 2012/3
Y1 - 2012/3
N2 - 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.
AB - 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.
KW - Aggregate volume fraction
KW - Fracture energy
KW - Meso-mechanical modeling
KW - Notch depth
UR - http://www.scopus.com/inward/record.url?scp=80155182061&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2011.08.080
DO - 10.1016/j.conbuildmat.2011.08.080
M3 - Article
AN - SCOPUS:80155182061
SN - 0950-0618
VL - 28
SP - 437
EP - 443
JO - Construction and Building Materials
JF - Construction and Building Materials
IS - 1
ER -