Abstract
Based on effective media theory, a predictive model, relating chloride diffusivity to the capillary pores, gel pores, tortuosity factor, and pore size distribution of hardened cement, is proposed. To verify the proposed model, the diffusion coefficient of chloride ions, the degree of hydration, and peak radius of capillary pores of cement paste specimens were measured. The predicted results for chloride diffusivity were compared with published data. The results showed that the predicted chloride diffusivity of hardened cement paste was in good agreement with the experimental results. The effect of the evolution of pore structures in cement paste on chloride diffusivity could be deduced simultaneously using the proposed model.
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References
AutoPore IV 9500, 2001. Operator’s Manual V1.04 Appendix D. Micromeritices Instrument Corporation, USA.
Caré, S., 2003. Influence of aggregates on chloride diffusion coefficient into mortar. Cement and Concrete Research, 33(7):1021–1028. [doi:10.1016/S0008-8846(03)00009-7]
Cook, R.A., Hover, K.C., 1999. Mercury porosimetry of hardened cement pastes. Cement and Concrete Research, 29(6):933–943. [doi:10.1016/S0008-8846(99)00083-6]
Garboczi, E.J., Bentz, D.P., 1992. Computer simulation of the diffusivity of cement-based materials. Journal of Materials Science, 27(8):2083–2092.
Halamickova, P., Detwiler, R.J., Bentz, D.P., 1995. Water permeability and chloride ion diffusion in Portland cement mortars: relationship to sand content and critical pore diameter. Cement and Concrete Research, 25(4):790–802. [doi:10.1016/0008-8846(95)00069-O]
Huang, X.F., Zheng, J.J., Zhou, X.Z., 2010. Simple analytical solution for the chloride diffusivity of cement paste. Science and Technology of Overseas Building Materials, 31(2):4–6 (in Chinese).
Ishida, T., Miyahara, S., Maruya, T., 2008. Chloride binding capacity of mortars made with various Portland cement and mineral admixtures. Journal of Advanced Concrete Technology, 6(2):287–301. [doi:10.3151/jact.6.287]
Ishida, T., Iqbal, P.O., Anh, H.T.L., 2009. Modeling of chloride diffusivity coupled with non-linear binding capacity in sound and cracked concrete. Cement and Concrete Research, 39(10):913–923. [doi:10.1016/j.cemconres.2009.07.014]
Lu, X.Y., 1997. Application of the Nernst-Einstein equation to concrete. Cement and Concrete Research, 27(2):293–302. [doi:10.1016/S0008-8846(96)00200-1]
Maekawa, K., Ishida, T., Kishi, T., 2003. Multi-scale modeling of concrete performance integrated material and structural mechanics. Journal of Advanced Concrete Technology, 1(2):91–126. [doi:10.3151/jact.1.91]
Maekawa, K., Ishida, T., Kishi, T., 2009. Multi-Scale Modeling of Structural Concrete. Taylor & Francis, London and New York, p.118–121.
Mindess, S., Young, F.J, Darwin, D, 2002. Concrete, 2nd Edition. Prentice Hall, USA, p.478–479.
Nakarai, K., Ishida, T., Maekawa, K., 2006. Multi-scale physiochemical modeling of soil-cementitious material interaction. Soils and Foundations, 46(5):653–664. [doi: 10.3208/sandf.46.653]
Ngala, V.T., Page, C.L., 1997. Effects of carbonation on pore structure and diffusional properties of hydrated cement pastes. Cement and Concrete Research, 27(7):995–1007.
Oh, B.H., Jang, S.Y., 2004. Prediction of diffusivity of concrete based on simple analytic equations. Cement and Concrete Research, 34(3):463–480. [doi:10.1016/j.cemconres.2003.08.026]
Pivonka, P., Hellmich, C., Smith, D., 2004. Microscopic effects on chloride diffusivity of cement pastes-a scaletransition analysis. Cement and Concrete Research, 34(12):2251–2260. [doi:10.1016/j.cemconres.2004.04.010]
Powers, T.C., 1962. Physical Properties of Cement Paste. Proceedings of the Fourth International Conference on the Chemistry of Cement, Washington, DC. US National Bureau of Standards Monograph, 43(2):577–613.
Zhang, W.M., Ba, H.J., 2010. Effect of mineral admixtures and repeated loading on chloride migration through concrete. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 11(9):683–690. [doi: 10.1631/jzus.A0900609]
Zhang, J.Z., Wang, J.Z., Kong, D.Y., 2010. Chloride diffusivity analysis of existing concrete based on Fick’s second law. Journal of Wuhan University of Technology-Materials Science Edition, 25(1):142–146. [doi:10.1007/s11595-010-1142-4]
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Project supported by the National Basic Research Program (973) of China (No. 2009CB623200), the National High-Tech R&D Program (863) of China (No. 2008AA030794), and the Postgraduates Research Innovation in University of Jiangsu Province, China (No. CX10B-064Z)
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Sun, Gw., Sun, W., Zhang, Ys. et al. Relationship between chloride diffusivity and pore structure of hardened cement paste. J. Zhejiang Univ. Sci. A 12, 360–367 (2011). https://doi.org/10.1631/jzus.A1000413
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DOI: https://doi.org/10.1631/jzus.A1000413