EVALUATING THE INTRINSIC PERMEABILITY OF CEMENTITIOUS MATERIALS USING A FALLING HEAD GAS PERMEAMETER
Kenneth A. Snyder, Chiara Villani, Jason Weiss
This paper examines the pressure-dependent gas permeability as measured using a falling head gas permeameter. A series of experiments were performed on mortars with varying mixture proportions, and measurements were made with different initial applied pressures. The governing equation is based on an analogy to a falling head liquid permeameter, but accounting for the gas compressibility. This formulation overcomes a limitation of other approaches due to their dependence on the initial pressure that is applied and on the range of data that is considered in evaluating transport properties. The results obtained confirm that the permeability is inversely proportional to the pressure applied as per Klinkenberg equation. By analogy to steady-state gas permeameters, this approach makes it possible to determine an intrinsic permeability that is independent of the initial pressure applied and is a true characteristic of the pore space available for gas transport.
, Villani, C.
and Weiss, J.
EVALUATING THE INTRINSIC PERMEABILITY OF CEMENTITIOUS MATERIALS USING A FALLING HEAD GAS PERMEAMETER, Advances in Civil Engineering Materials, [online], https://doi.org/10.1520/ACEM20150021
(Accessed December 5, 2023)