Electrical Methods for Evaluating Mass Transport Properties of Concrete-Modeling Multi-Species Ionic Transport in Concrete Using In-Situ Electrical Measurements and Local Environmental Data (Recorded Presentation)

Modeling Multi-Species Ionic Transport in Concrete Using In-Situ Electrical Measurements and Local Environmental Data (Recorded Presentation)

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Video Summary

The presentation discusses two primary approaches for modeling chloride transport in concrete structures: the Fickian approach (based on Fick's second law) and the Nernst-Planck approach. The Fickian method is simpler but only handles single ionic species and lacks information on variables like pH and electrical conductivity. The Nernst-Planck method, though more complex with detailed inputs, can account for multiple ionic species and offer insights into various properties like pH and conductivity. The researchers aim to improve the modeling of chloride transport by incorporating environmental data, such as temperature and humidity, sourced from weather stations, and using resistivity measurements to estimate salt usage. They focus on Oregon, dividing it into regions with similar environmental conditions to refine boundary condition estimates. Their methodology offers a simpler, onsite measurable solution for evaluating aging concrete while predicting chloride profiles through comprehensive simulations without extensive lab testing.

Keywords

chloride transport

Fickian approach

Nernst-Planck method

environmental data

concrete structures