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Optical Microscopy and Digital Image Analysis of Bond-Cracks in Cement Based Materials

Published online by Cambridge University Press:  21 February 2011

Adri Vervuurt  and
Jan G.M. Van Mier
Adri Vervuurt
Affiliation:
Stevin Laboratory, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands
Jan G.M. Van Mier
Affiliation:
Stevin Laboratory, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands
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Abstract

A new testing method is presented in which the properties of the bond zone between aggregate and matrix in concrete are investigated. The reason for starting the investigation is the improvement of the lattice model, which is developed at the Stevin Laboratory. In the lattice model the material is schematized as a lattice of beam elements. The fracture properties of the individual beam elements are purely brittle, and the use of fracture energy parameters as a material property can be avoided for simulating the non-linear fracture process. In spite of the fact that a locally brittle law is used, the global behaviourshows softening of the material. An improved optical microscopy technique in combination with image processing is adopted for investigating the fracture process during loading.

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 , 337
Copyright
Copyright © Materials Research Society 1995

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References

[1] Mindess, S.. The Application of Fracture Mechanics to Cement and Concrete: A Historical View, Fracture Mechanics of Concrete, ed. Wittmann, F.H., Elseviers Science, Amsterdam, (1983), 1–30.Google Scholar
[2] Hillerborg, A., Modéer, M. & Petersson, P.-E.. Analysis of Crack Formation and Crack Growth in Concrete by Means of Fracture and Finite Elements, Cem.Concr.Res., 6(6) (1976), 773–782.Google Scholar
[3] Guinea, G.V., Planas, J. & Elices, M.. Measurement of the Fracture Energy using Three-Point Bend Tests: Part 1-Influence of Experimental Procedures, Mat.&Struc., 25 (1992), 212–218.Google Scholar
[4] Schlangen, E.. Experimental and Numerical Analysis of Fracture Processes in Concrete Ph.D. Dissertation, Delft University of Technology, (1993).Google Scholar
[5] Vervuurt, A. & Mier, J.G.M. Van. Experimental and Numerical Analysis of Boundary Effects in Uniaxial Tensile Tests, Localized Damage III: Computer Aided Assesment and Control, eds. Aliabadi, M.H. et al. , Computational Mechanics Publications, Southhampton, (1994), 3–10.Google Scholar
[6] Mier, J.G.M. Van. Mode I Fracture of Concrete: Discontinuous Crack Growth and Crack Interface Grain Bridging, Cem.tYCon.Res, 21(1) (1991), 1–15.Google Scholar
[7] Mier, J.G.M. Van. Crack Face Bridging in Normal, High Strength and Lytag Concrete, in Fracture Processes in Concrete, Rock and Ceramics, eds. Mier, J.G.M. Van Rots, J.G. & Bakker, A., Chapmann & Hall/E&FN Spon, London, 1 (1991), 27–40.Google Scholar
[8] Mier, J.G.M. Van, Vervuurt, A. & Schlangen, E.. Crack Growth Simulations in Concrete and Rock, Probabilities and Materials. Tests, Models and Applications, ed. Breysse, D., NATO-ASI Series E Applied Science, Kluwer Academic Publishers, 269 (1994), 377–388.Google Scholar
[9] Hrennikoff, A.. Solution of Problems of Elasticity by the Framework Method, J.Appl.Mech., 12 (1941), A169–A175.Google Scholar
[10] Herrmann, H.J., Hansen, A. & Roux, S.. Fracture of Disordered Lattices in Two Dimensions, Physical Review B, 39(1) (1989), 637–648.Google Scholar
[11] Schlangen, E. & Mier, J.G.M. Van. Boundary Effects in Mixed Mode I and II Fracture of Concrete, in Fracture Processes in Concrete, Rock and Ceramics, eds. Mier, J.G.M. Van Rots, J.G. & Bakker, A., Chapmann & Hall/E&FN Spon, London, 2 (1991), 705–716.Google Scholar
[12] Burt, N.J. & Dougill, J.W.. Progressive Failure in a Model Heterogeneous Medium, J.Engng.Mech.Div. (ASCE), 103 (1977), 365–376.Google Scholar
[13] Bažant, Z.P., Tabbara, M.R., Kazemi, M.T. & Pijaudier-Cabot, G.. Random Particle Model for Fracture of Aggregate or Fiber Composites, J.Eng.Mech. (ASCE), 116 (1990), 1686–1705.Google Scholar
[14] Moukarzel, C. & Herrmann, H.J.. A Vectorizable Random Lattice, Preprint HLRZ 1/92, HLRZ-KFA, Jülich, Germany, (1992).Google Scholar
[15] Vliet, M.R.A. Van; & Mier, J.G.M. Van. Comparison of Lattice Type Fracture Models for Concrete under Biaxial Loading Regimes, in Proc. IUTAM Symp. on Size-Scale Effects in the Failure Mechanisms of Materials and Structures, ed. Carpinteri, A., Politecnico di Torino, Torino, Italy, Chapmann & Hall/E&FN Spon London/New York, (1994), (in press).Google Scholar
[16] Mier, J.G.M. Van, Vervuurt, A. & Vliet, M.R.A. Van. Damage Analysis of Brittle Materials: Concrete and Rock, To appear in Proc. ICM-7 (Mechanics of Materials), The Hague (The Netherlands), May 1995.Google Scholar
[17] Vervuurt, A., Mier, J.G.M. van & Schlangen, E.. Analyses of Anchor Pull-Out in Concrete, Mat.&Struct., 27 (1994), 251–259.Google Scholar
[18] Hsu, T.T.C.. Mathematical Analysis of Shrinkage Cracking in a model of Hardened Concrete, J.Applied Mech., (1963), 371–390.Google Scholar
[19] Lee, K.M., Buyukozturk, O., Oumera, A.. Fracture Analysis of Mortar-Aggregate Interfaces in Concrete, J.Eng.Mech., 118(10) (1992), 2031–2047.Google Scholar
[20] Linsbauer, H.N. & Tschegg, E.K.. Fracture Energy Determination of Concrete with Cube Shaped Specimens, Zement und Beton, 31 (1986), 38–40.Google Scholar
[21] Vervuurt, A. & Mier, J.G.M. Van. An Optical Technique for Surface Crack measurements of Composite Materials, Recent Advances in Experimental Mechanics, eds. Gomes, S. et al. , Balkema Rotterdam, (1994), 437–442.Google Scholar