Study on the Permeability Model of the Porous Concrete
This paper presents an effective model which can equivalently regard the pores in the porous concrete as a series of capillary bundles with the same diameter due to the complexity of the pores in the porous concrete. The proposed model was used to calculated the total flows of all capillary bundles in the test piece by the single capillary bundle calculation approach from the Hagen-Poiseuille theorem, and together with the well known Darcy theorem to determine the relationship among the flow of the porous concrete, the diameter of pore and the minus of up and down water pressures. The experimental results show that the permeability of the porous concrete mainly depends on the pores with diameter more than 4.12mm, and the pore structure changes obviously when the valid porosity of the porous concrete is greater than 25%.
Hui Li, Yan Feng Liu, Ming Guo, Rui Zhang and Jing Du
F. R. Zhao et al., "Study on the Permeability Model of the Porous Concrete", Advanced Materials Research, Vols. 374-377, pp. 1369-1373, 2012