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Crack Stability in the Fracture of Cementitious Materials

Published online by Cambridge University Press:  21 February 2011

S. Tandon ,
K.T. Faber  and
Z.P. Bazant
S. Tandon
Affiliation:
Dept. of Materials Science and Engineering, Northwestern University, Evanston, I1 60208
K.T. Faber
Affiliation:
Dept. of Materials Science and Engineering, Northwestern University, Evanston, I1 60208
Z.P. Bazant
Affiliation:
Dept. of Civil Engineering, Robert R. McCormick School of Engineering and Applied Science, Northwestern University, Evanston, I1 60208
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Abstract

The aim of the present study is to investigate the stability of crack propagation in cementitious materials. Tests were conducted on bend specimens in three-point and four-point loading conditions. Three-point bend specimens showed stable crack growth for mortar, normal strength and high strength concrete specimens. Alternatively, four-point bend specimens showed catastrophic failure for mortar and quasi-catastrophic failure for normal strength and high strength concrete specimens. Results will be discussed in relation to brittleness number model and specific microstructural features including the interfacial transition zone between the cement paste and the aggregate and the attendant toughening mechanisms.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 370: Symposia Va/Vb – Microstructure of Cement-Based Systems/Bonding and Interfaces in Cement... , 1994 , 387
Copyright
Copyright © Materials Research Society 1995

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References

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