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The open porosity is defined as the fraction of volume that is occupied by the fluid in the interconnected porous network. Non-interconnected voids trapped in the solid phase are not part of the open porosity; they are part of the closed porosity. The true bulk density is in the vacuum density of the porous aggregate.

Equipment: Porosity and Density Meter
Standard: None
Method 1: Isothermal pressure/mass method [1]
Method 2: Missing mass method to measure open porosity of porous solid [2]
Properties: ϕ – open porosity;  ρ – true bulk density (kg/m³)

open porosity paste imageopen porosity and bulk density image


[1] Y. Salissou and R. Panneton, “Pressure/mass method to measure open porosity of porous solids,” J. Appl. Phys. 101, 124913 (2007).
[2] R. Panneton and E. Gros, “A missing mass method to measure the open porosity of porous solids,” Acta-Acustica 91(2), 342-348 (2005).