Real-time monitoring the electrical properties of pastes to map the hydration induced microstructure change in cement-based materials

The effect of the supplementary materials (SCMs) on moisture content and ion diffusivity at different hydration time is important for service life modelling modern concrete. This study designed a simple but valid method to monitor microstructure change in pastes during hydration. A procedure easy implement was proposed detect water pastes. electrical conductivity pore solution evaluated by evaporable chemical composition binders. Results show that properties (conductivity, formation factor its growth rate) can effectively indicate reactivity binder, connectivity volume hardened water-binder ratio SCMs structure are indexed which divided paste. inflection point average rate good index final setting relation between well demonstrated extended percolation theory. real-time monitored be used calculate chloride migration coefficient cement