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An investigation of the effects of mix strength on the fracture and fatigue behavior of concrete mortar

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Abstract

This paper examines the effects of mix compressive strength (30, 35 and 40 MPa) on the fracture initiation toughness, resistance-curve behavior and fatigue crack growth behavior of concrete mortar. The fracture initiation toughness and the resistance-curve behavior are shown to increase with increasing mix strength. The observed resistance-curve behavior is then attributed largely to the effects of ligament bridging, which are predicted using small- and large-scale bridging models. In contrast, the fatigue crack growth resistance is shown to decrease with increasing mix strength. An extended multiparameter framework was used for the modeling of fatigue crack growth. Finally, the implications of the results are discussed for the design of concrete mixtures with attractive combinations of strength, fracture toughness and fatigue crack growth resistance.

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Acknowledgments

The research is supported by The Division of Mechanics and Materials of The National Science Foundation, with Dr. Oscar Dillon and Dr. Ken Chong as Program Monitors. Appreciation is also extended to Dr. Dan Davis for his encouragement and support of this work.

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Authors and Affiliations

  1. Princeton Materials Institute, and the Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ, 08544, USA

    J. Lou & W. O. Soboyejo

  2. Department of Food, Agricultural and Biological Engineering, and the Department of Aerospace Engineering, The Ohio State University, Columbus, OH, 43210, USA

    K. Bhalerao & A. B. O. Soboyejo

Authors
  1. J. Lou
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  2. K. Bhalerao
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  3. A. B. O. Soboyejo
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  4. W. O. Soboyejo
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Correspondence to W. O. Soboyejo.

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Lou, J., Bhalerao, K., Soboyejo, A.B.O. et al. An investigation of the effects of mix strength on the fracture and fatigue behavior of concrete mortar. J Mater Sci 41, 6973–6977 (2006). https://doi.org/10.1007/s10853-006-0219-0

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  • DOI: https://doi.org/10.1007/s10853-006-0219-0

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