Effect of Blending Materials on the Durability of Concrete (I) Diffusion of Cl-ions through Hardened Cement Paste

염분환경하 콘크리트 경화체의 내구성에 미치는 혼합재의 영향 (I) 시멘트 경화체중에서의 Cl-이온의 확산

Apparent diffusion coefficients of Cl-ions through hardened cement paste(HCP), which were partly substituted blending materials, were determined. Also, pore solution was extracted from HCP which were immersed in NaCl solution, and Cl- concentration of the solution were analyzed. Partly substitution of pozzolanic materials considerably reduced the diffusion rate for Cl-ions and Cl- concentration of pore solution. Binding capacity of Cl- is related to the content of Al2O3 and pozzolanic reactivity.