The Impact of Tortuosity on Chloride Ion Diffusion in Slag-Blended Cementitious Materials

DOI HANDLE Web Site 被引用文献1件 参考文献31件 オープンアクセス
  • Hatanaka Akira
    Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Japan.
  • Elakneswaran Yogarajah
    Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Japan.
  • Kurumisawa Kiyofumi
    Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Japan.
  • Nawa Toyoharu
    Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Japan.

抄録

<p>The purpose of this study is to determine the tortuosity of cementitious materials containing blast furnace slag (BFS). Furthermore, the influence of tortuosity on multi-species transport into these materials is studied. The porosity and diffusivity of calcium silicate hydrate (C-S-H) were predicted using a three-dimensional spatial distribution model, which were then fitted to Archie’s law to determine tortuosity. The tortuosity increased with the slag replacement ratio, suggesting that the diffusion path for ions becomes complicated and lengthy due to slag addition. Thermoporometry was used to determine the pore size distribution of hydrated slag-blended cement. A partial replacement of ordinary Portland cement (OPC) with BFS modified the mineralogy (especially in the types of C-S-H), resulting in changes to the pore structure. The determined tortuosity and porosity were used in a reactive transport model to predict multi-species transport. Experimentally measured and simulated chloride profiles were in good agreement for hydrated OPC and slag-blended cements exposed to sodium chloride solutions. The causes for the low penetration rate of chloride in slag-blended cementitious materials are discussed considering their pore structure and surface electrical properties. The role of tortuosity on Cl-/OH- for the evaluation of chloride induced corrosion was also discussed. </p>

収録刊行物

被引用文献 (1)*注記

もっと見る

参考文献 (31)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ