A preliminary SEM study of crack propagation in mortar |
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| Authors: | Sidney Mindess Sidney Diamond |
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| Affiliation: | Department of Civil Engineering University of British Columbia, USA;School of Civil Engineering Purdue University, USA |
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| Abstract: | A device constructed to permit the testing of wedge-loaded compact tension specimens of mortar within the sample chamber of an SEM is described. Using this device, the process of cracking was observed in mortar specimens. It was found that the process of crack extension in mortars is very complicated: the crack is tortuous, there is some branch cracking, discontinuities in the cracks are observed, and there is some tearing away of small bits of material in some areas of cracking. The results suggest that the simple fracture mechanics models oversimplify the geometric features of the crack extension process. |
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