ABSTRACT
Durability is important for the life cycle of reinforced concrete structures. Pore structure and mass transfer characteristics are related. Understanding the pore structure is necessary but difficult. It has been shown that gas and liquid have different mass transfer characteristics, and we thought that this difference could be express the pore structure. In this study, air permeability tests, Water penetration rate coefficient test, and porosity measurements were conducted. Various admixtures were used because the porosity is different depending on the admixture. As a result, it’s clear that the mass transfer characteristics are different depending on the admixtures and amount of its content. Silica fume and blast furnace slag fine powder in high proportion showed high mass transfer resistance, and the water penetration rate coefficient was about 1/2 that of N. The difference between the air permeability and water penetration rate coefficients indicates the possibility of expressing the complexity of pores.
