Fundamental approach to compute gas and water permeability of concrete is suggested. For several compositions of cement pastes, the permeability coefficients were calculated with the analytical formulation, followed by a microstructure-based model. As the result of calculation of permeabilities for concrete, hydration leaded to the significant reduction of the coefficients. Meanwhile, the relationship between gas permeability and water permeability has a linear function for cement paste based on Klinkenberg effect, however, which is not effective for concrete.

• 윤인석(인덕대학교 건설정보과 교수) | Yoon, In-Seok