Lecture

The flux equation

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Description

This lecture covers the concept of the flux equation in the context of sorption and transport in cementitious materials, explaining the relationship between heat or moisture flux, thermal conductivity, and temperature gradient. It also delves into examples and applications of the flux equation, including Fick's first law. Additionally, it discusses water content and related variables such as water saturation, reduced water content, and capillary potential, providing insights into transport parameters and diffusivity. The lecture concludes by summarizing the key points covered.

In MOOC

Sorption and transport in cementitious materials

In the MOOC: “Cement chemistry and sustainable cementitious materials”; you learned how to create more sustainable cementitious materials. But concrete is not an inert rock. It is a dynamic porous material, which can exchange water, gas and ions with its environment. Through physical and chemical interactions, these exchanges can have dramatic consequences: cracks due to shrinkage, reinforcement bars corrosion, spalling, … For a true sustainability, the durability of cementitious materials should not be f

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