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Effect Of Aggregate Content On Fracture Behavior Of Concrete

Published online by Cambridge University Press:  15 February 2011

Y. Xi ,
F.E. Amparano  and
Zongjin Li
Y. Xi
Affiliation:
Dept.of Civil and Architectural Engineering, Drexel University, Pennsylvania, PA 19104
F.E. Amparano
Affiliation:
Dept.of Civil and Architectural Engineering, Drexel University, Pennsylvania, PA 19104
Zongjin Li
Affiliation:
The Hong Kong University of Science and Technology, Hong Kong
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Abstract

Effect of aggregate content on fracture behaviors of concrete is studied by testing on geometrically similar three-point bend beams. The results are analyzed by using a size effect method in which the fracture behavior of concrete is characterized by two parameters, fracture energy Gf and effective fracture process zone cf. Test results showed that with increasing volume fraction of aggregate in the range 45% - 75%: (1) the modulus of elasticity of concrete decreases slightly, (2) fracture energy Gf increases, but the rate is very small; (3) the size of the fracture process zone, cf, decreases, which may be explained by changes in coarseness of grain structures defined in terms of mosaic patterns.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 409: Symposium Q – Fracture-Instablility Dynamics, scaling and Ductile/Brittle Behavior , 1995 , 255
Copyright
Copyright © Materials Research Society 1996

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