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
Appears on pages(s): 401-410
Keywords: concrete; crack; water permeability; steel fiber; Poiseuille law
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.