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Title: Investigation of fiber effect on the geometrical property of crack and water permeability of cracked concrete

Author(s): Ding, Y.;Li, D.; Zeng, W.

Publication: Symposium Paper

Volume: 343


Appears on pages(s): 401-410

Keywords: concrete; crack; water permeability; steel fiber; Poiseuille law


Date: 10/1/2020

The water permeability of the concrete with cracks has been studied in this paper. Cylindrical specimens with different fiber contents were pre-cracked, and specimens without any fiber reinforcement were also investigated as reference. The water permeability of the specimens with different crack width was measured by hydraulic permeability test. The measured data of the crack surface was collected by the self-developed data acquisition system, the total crack length and surface area of the samples were analyzed, the geometrical property of crack (tortuosity and roughness) was evaluated quantitatively. The results showed that the tortuosity and roughness of the cracked surface can be increased greatly by addition of the macro steel fiber. The coefficient of the water permeability of the specimens followed the Poiseuille law by considering of the influence of the crack geometrical property.