Abstract
In this paper, a new analytic model for predicting chloride diffusivity in unsaturated cementitious materials is developed based on conductivity theory and Nernst-Einstein equation. The model specifies that chloride diffusivity in unsaturated cementitious materials can be mathematically described as a function of chloride diffusivity in saturated state, water saturation and average pore diameter of the material. A series of experiments were conducted in order to validate the model. Mortar samples with varying cementitious mixtures were cast and cured for one year, followed by oven drying at 50 °C until desired water saturation levels (18 to 100 %) and homogeneous moisture distribution were obtained. The electrical conductivities of mortar specimens at various water saturations were measured and then converted into chloride diffusivities by using Nernst-Einstein equation. It is found that the experimental results can be well described by the analytic model proposed in this work.
| Original language | English |
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| Title of host publication | 1st International Conference on Construction Materials for Sustainable Future, |
| Subtitle of host publication | 19-21 April 2017, Zadar, Croatia |
| Editors | I.B. Pecur, A. Baricevic, N Stirmer, D. Bjegovic |
| Pages | 804-809 |
| Number of pages | 8 |
| ISBN (Electronic) | 978-953-8168-04-8 |
| Publication status | Published - 2017 |
| Event | 1st International Conference on Construction Materials for Sustainable Future - Zadar, Croatia Duration: 19 Apr 2017 → 21 Apr 2017 Conference number: 1 http://www.grad.hr/coms/ocs/index.php/coms/coms2017 |
Conference
| Conference | 1st International Conference on Construction Materials for Sustainable Future |
|---|---|
| Abbreviated title | CoMS 2017 |
| Country/Territory | Croatia |
| City | Zadar |
| Period | 19/04/17 → 21/04/17 |
| Internet address |
Keywords
- Flexible mould
- rheology
- thixotropy
- deformation
- cracking