Relationship between chloride diffusivity and pore structure of hardened cement paste

被引:0
作者
Guo-wen Sun
Wei Sun
Yun-sheng Zhang
Zhi-yong Liu
机构
[1] Southeast University,Jiangsu Key Laboratory of Construction Materials
来源
Journal of Zhejiang University-SCIENCE A | 2011年 / 12卷
关键词
Hardened cement paste; Chloride diffusivity; Porosity; Tortuosity factor; Constrictivity; TU528;
D O I
暂无
中图分类号
学科分类号
摘要
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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页码:360 / 367
页数:7
相关论文
共 37 条
[1]  
Caré S.(2003)Influence of aggregates on chloride diffusion coefficient into mortar Cement and Concrete Research 33 1021-1028
[2]  
Cook R.A.(1999)Mercury porosimetry of hardened cement pastes Cement and Concrete Research 29 933-943
[3]  
Hover K.C.(1992)Computer simulation of the diffusivity of cement-based materials Journal of Materials Science 27 2083-2092
[4]  
Garboczi E.J.(1995)Water permeability and chloride ion diffusion in Portland cement mortars: relationship to sand content and critical pore diameter Cement and Concrete Research 25 790-802
[5]  
Bentz D.P.(2010)Simple analytical solution for the chloride diffusivity of cement paste Science and Technology of Overseas Building Materials 31 4-6
[6]  
Halamickova P.(2008)Chloride binding capacity of mortars made with various Portland cement and mineral admixtures Journal of Advanced Concrete Technology 6 287-301
[7]  
Detwiler R.J.(2009)Modeling of chloride diffusivity coupled with non-linear binding capacity in sound and cracked concrete Cement and Concrete Research 39 913-923
[8]  
Bentz D.P.(1997)Application of the Nernst-Einstein equation to concrete Cement and Concrete Research 27 293-302
[9]  
Huang X.F.(2003)Multi-scale modeling of concrete performance integrated material and structural mechanics Journal of Advanced Concrete Technology 1 91-126
[10]  
Zheng J.J.(2006)Multi-scale physiochemical modeling of soil-cementitious material interaction Soils and Foundations 46 653-664