The effect of mechanical stress on permeability of concrete: A review |
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| Authors: | Meghdad Hoseini Vivek Bindiganavile Nemkumar Banthia |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada T6G 2W2;2. Department of Civil Engineering, University of British Columbia, Vancouver, BC, Canada V6T 1Z4;1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, PR China;2. Key Laboratory of Civil Engineering Structure & Disaster Prevention and Mitigation Technology of Zhejiang Province, Hangzhou 310014, PR China;1. Department of Civil Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan;2. Nishimatsu Construction Co., Ltd, Japan;1. College of Civil Engineering, Qingdao University of Technology, Qingdao 266033, PR China;2. Centre for Future Materials, University of Southern Queensland, Toowoomba, QLD 4350, Australia;3. Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha 410082, PR China;4. Guangzhou University – Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou University, Guangzhou 510006, PR China |
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| Abstract: | The presence of aggressive fluids and their transport is by far the most important factor controlling the durability of cement based composites. In structural concrete, the application of mechanical stress leads to cracking, which in turn affects the transport properties adversely, but very little is known of this influence. The paper highlights the vast discrepancy between experimentally determined permeability data, which appear to be largely artifacts of disparate test procedures. In particular, it is not clear if an equilibrium was attained in the fluid flow and further, whether the flow measurements were made in the presence of the applied stress, which together make it very difficult to compare experimental data. Nevertheless it is clear that stress induced cracking leads to a surge in fluid flow and there exists a threshold value for both the applied stress and the resultant crack width associated with fluid permeability in concrete. |
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