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首页> 外文会议>Fourth International Conference on Repair, Rehabilitation, and Maintenance of Concrete Structures, and Innovations in Design and Construction Seoul, Korea, September 2000 >Assessment of Diffusion Coefficient of Chloride Ions in Mortars Using Different Types of Binders
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Assessment of Diffusion Coefficient of Chloride Ions in Mortars Using Different Types of Binders

机译：使用不同类型的粘合剂评估砂浆中氯离子的扩散系数

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摘要

Electro-migration and diffusion of ions in electrolyte solution are theoretically described by the Nernst-Plank equation. Also, electro-migration and diffusion of ion can be related by using the Einstein's equation in dilute solution. In concrete, however, the relationship between electro-migration and diffusion is still unclear, for the influence of the concentrations in pore solution is unknown. Previous work of the authors has shown that it is possible to assess the diffusion coefficients of chloride ion in an ordinary Portland cement mortar through conduction tests by following the Nernst-Plank equation, Debye-Huckel theory and electro-neutrality. This paper evaluates the adaptability of this method to mortars made of several binders, such as ordinary Portland cement, high-early strength Portland cement, sulfate-resistant Portland cement, low-heat Portland cement, Portland blast-furnace slag cement, ordinary Portland cement with fly ash, ordinary Portland cement with silica fume. In these cases, the concentrations of calcium, sodium, potassium, chloride, and hydroxide ions are different from that of the ordinary Portland cement case. Thus, the adaptability of this method is confirmed in mortar made of a wide range of binders.
机译：离子在电解质溶液中的电迁移和扩散理论上通过能斯特-普朗克方程进行描述。同样，可以通过在稀溶液中使用爱因斯坦方程来关联离子的电迁移和扩散。然而，在混凝土中，电迁移与扩散之间的关系仍然不清楚，因为孔溶液中浓度的影响尚不清楚。作者的先前工作表明，遵循Nernst-Plank方程，Debye-Huckel理论和电中性，可以通过传导测试评估普通硅酸盐水泥砂浆中氯离子的扩散系数。本文评估了该方法对由几种粘结剂制成的砂浆的适应性，例如普通硅酸盐水泥，高早期强度硅酸盐水泥，耐硫酸盐硅酸盐水泥，低热硅酸盐水泥，硅酸盐高炉渣水泥，普通硅酸盐水泥。粉煤灰，普通硅酸盐水泥硅酸盐。在这些情况下，钙，钠，钾，氯和氢氧根离子的浓度与普通波特兰水泥的情况不同。因此，在由多种粘合剂制成的砂浆中证实了该方法的适应性。

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