HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

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

Files in This Item:
15_426.pdf1.28 MBPDFView/Open
Please use this identifier to cite or link to this item:

Title: The Impact of Tortuosity on Chloride Ion Diffusion in Slag-Blended Cementitious Materials
Authors: Hatanaka, Akira Browse this author
Elakneswaran, Yogarajah Browse this author
Kurumisawa, Kiyofumi Browse this author →KAKEN DB
Nawa, Toyoharu Browse this author →KAKEN DB
Issue Date: Aug-2017
Publisher: Japan Concrete Institute
Journal Title: Journal of advanced concrete technology
Volume: 15
Issue: 8
Start Page: 426
End Page: 439
Publisher DOI: 10.3151/jact.15.426
Abstract: 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.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Elakneswaran YOGARAJAH

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University