Investigation of fracture processes in young concrete using electronic speckle pattern interferometry (ESPY)

Title: Investigation of fracture processes in young concrete using electronic speckle pattern interferometry (ESPY)
Author(s): K. Hariri, F.S. Rostásy
Paper category : conference
Book title: International RILEM Conference on Early Age Cracking in Cementitious Systems
Editor(s): K. Kovler and A. Bentur
Print-ISBN: 2-912143-29-2
e-ISBN: 2351580362
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 209 - 216
Total Pages: 8
Nb references: 6
Language: English

Abstract: Concrete is a quasi-brittle material. In deformation controlled axial tensile tests of con-crete prisms, one observes a gradual softening after reaching the maximum load. The reason for this softening is primarily caused by the heterogenity of concrete. In contrast to linear-elastic fracture mechanics, the tensile fracture of concrete is not combined with a discrete crack but with a fracture process zone (FPZ), a densely microcracked volume. The width of the FPZ was quoted to be 2-3 times the maximum aggregate size. The experimental evidence of this estimation is still lacking. The aim of the presented inves-tigations is to determine the size of the FPZ because of its major importance in material and structural modeling.

Online publication: 2010-06-02
Publication type : full_text
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