Water permeability of concrete

Author(s): Bei Huang, Chunxiang Qian, Yujiang Wang, Miao Wu
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 496-504
Total Pages: 8
Language: English

Abstract: The waterproofing durability of concrete is an attentive focus in underground engineering and hydraulic structures. Water seepage law in non-cracked concrete, concrete under tension and real cracks in concrete were mainly studied in this paper. The experimental results indicated that Non-Darcy model was followed in non-cracked concrete whether it bears tensile stress or not. When the starting pressure gradient (λ) equaled to pressure gradient P, the process of penetrate stopped. There existed a balance depth in the process of the water permeation. With the increase of tension, the λ decreased. To characterize the water seepage law in the real concrete cracks, two parameters τ(tortuosity of cracks) and m (roughness of cracks) were introduced into the Navier-Stokes Equation. And the result indicated the modified Navier-Stokes Equation could describe the seepage law in real concrete cracks well and the value of m in the real concrete cracks was less than 1.15 according to the experimental results.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00