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Effect of ITZ on durability of cement concrete exposed to chloride solutions

Kai Wu (UGent) , Geert De Schutter (UGent) , HS Shi, Guang Ye (UGent) , Yun Gao (UGent) and Zhijun Tan (UGent)
(2013) PRO 84. 1. p.722-731
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Abstract
Concerning the microstructure of cement based materials, the interfacial transition zone (ITZ) is regarded as a key feature for durability. In order to determine the influence of ITZ on the chloride diffusion, two series of experiments were carried out by varying both the volume fraction and the size of aggregate. The transport process of chloride is only diffusion in this work. Results show that the addition of aggregate tends to modify the pore structure of cement-based materials and the chloride diffusion process. When ITZ quantities increase with a decrease in grain size, or the aggregates are sufficiently closely-spaced that the adjacent ITZ overlap in space, the ITZ effect would dominate the effects of the blocking aggregate and the tortuosity of matrix paste, and as a result, fluid and ions transport will be significantly enhanced. Additionally, the binding capacity is higher when the ITZ content is high.
Keywords
concrete, chloride, ITZ, durability, binding

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MLA
Wu, Kai, et al. “Effect of ITZ on Durability of Cement Concrete Exposed to Chloride Solutions.” PRO 84, edited by ZJ Li et al., vol. 1, RILEM Publications S.A.R.L., 2013, pp. 722–31.
APA
Wu, K., De Schutter, G., Shi, H., Ye, G., Gao, Y., & Tan, Z. (2013). Effect of ITZ on durability of cement concrete exposed to chloride solutions. In Z. Li, W. Sun, C. Miao, K. Sakai, O. Gjorv, & N. Banthia (Eds.), PRO 84 (Vol. 1, pp. 722–731). Bagneux, France: RILEM Publications S.A.R.L.
Chicago author-date
Wu, Kai, Geert De Schutter, HS Shi, Guang Ye, Yun Gao, and Zhijun Tan. 2013. “Effect of ITZ on Durability of Cement Concrete Exposed to Chloride Solutions.” In PRO 84, edited by ZJ Li, W Sun, CW Miao, K Sakai, OE Gjorv, and N Banthia, 1:722–31. Bagneux, France: RILEM Publications S.A.R.L.
Chicago author-date (all authors)
Wu, Kai, Geert De Schutter, HS Shi, Guang Ye, Yun Gao, and Zhijun Tan. 2013. “Effect of ITZ on Durability of Cement Concrete Exposed to Chloride Solutions.” In PRO 84, ed by. ZJ Li, W Sun, CW Miao, K Sakai, OE Gjorv, and N Banthia, 1:722–731. Bagneux, France: RILEM Publications S.A.R.L.
Vancouver
1.
Wu K, De Schutter G, Shi H, Ye G, Gao Y, Tan Z. Effect of ITZ on durability of cement concrete exposed to chloride solutions. In: Li Z, Sun W, Miao C, Sakai K, Gjorv O, Banthia N, editors. PRO 84. Bagneux, France: RILEM Publications S.A.R.L.; 2013. p. 722–31.
IEEE
[1]
K. Wu, G. De Schutter, H. Shi, G. Ye, Y. Gao, and Z. Tan, “Effect of ITZ on durability of cement concrete exposed to chloride solutions,” in PRO 84, Nanjing, China, 2013, vol. 1, pp. 722–731.
@inproceedings{4148714,
  abstract     = {{Concerning the microstructure of cement based materials, the interfacial transition zone (ITZ) is regarded as a key feature for durability. In order to determine the influence of ITZ on the chloride diffusion, two series of experiments were carried out by varying both the volume fraction and the size of aggregate. The transport process of chloride is only diffusion in this work. Results show that the addition of aggregate tends to modify the pore structure of cement-based materials and the chloride diffusion process. When ITZ quantities increase with a decrease in grain size, or the aggregates are sufficiently closely-spaced that the adjacent ITZ overlap in space, the ITZ effect would dominate the effects of the blocking aggregate and the tortuosity of matrix paste, and as a result, fluid and ions transport will be significantly enhanced. Additionally, the binding capacity is higher when the ITZ content is high.}},
  author       = {{Wu, Kai and De Schutter, Geert and Shi, HS and Ye, Guang and Gao, Yun and Tan, Zhijun}},
  booktitle    = {{PRO 84}},
  editor       = {{Li, ZJ and Sun, W and Miao, CW and Sakai, K and Gjorv, OE and Banthia, N}},
  isbn         = {{9782351581247}},
  keywords     = {{concrete,chloride,ITZ,durability,binding}},
  language     = {{eng}},
  location     = {{Nanjing, China}},
  pages        = {{722--731}},
  publisher    = {{RILEM Publications S.A.R.L.}},
  title        = {{Effect of ITZ on durability of cement concrete exposed to chloride solutions}},
  volume       = {{1}},
  year         = {{2013}},
}