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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2011, Vol. 12 Issue (5): 360-367    DOI: 10.1631/jzus.A1000413
Civil Engeering     
Relationship between chloride diffusivity and pore structure of hardened cement paste
Guo-wen Sun, Wei Sun, Yun-sheng Zhang, Zhi-yong Liu
Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
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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.

Key words： Hardened cement paste      Chloride diffusivity      Porosity      Tortuosity factor      Constrictivity     
Received: 18 September 2010      Published: 09 May 2011
CLC:  TU528  
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Guo-wen Sun
Yun-sheng Zhang
Wei Sun
Zhi-yong Liu
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Guo-wen Sun, Wei Sun, Yun-sheng Zhang, Zhi-yong Liu. Relationship between chloride diffusivity and pore structure of hardened cement paste. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(5): 360-367.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1000413     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2011/V12/I5/360

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