Moisture: Difference between revisions
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*The '''Materials''' themselves: Depending on the chemical composition, the porosity, the inner surfaces and their nature, each material has a different capacity to sorb moisture, both form air humidity (adsorption) or as liquid water (absorption). | *The '''Materials''' themselves: Depending on the chemical composition, the porosity, the inner surfaces and their nature, each material has a different capacity to sorb moisture, both form air humidity (adsorption) or as liquid water (absorption). | ||
* The '''Relative Humidity''' | * The '''Relative Humidity''' of the air: The higher the relative humidity, the higher the amount of moisture adsorbed by the material. | ||
*'''Liquid Water Uptake''': | *'''Liquid Water Uptake''': The presence of capillary pores in a material induces capillarity of liquid water when the surface is wetted by rain, fog, dew or in contact with a damp body, i.e., soils in the case of a building. In general, larger amounts of liquid water can be absorbed as compared to water vapor adsorption. | ||
[[Category:Moisture Measurement]] [[Category:Schwarz,Hans-Jürgen]] [[Category:R-SLaue]] [[Category: | [[Category:Moisture Measurement]] [[Category:Schwarz,Hans-Jürgen]] [[Category:R-SLaue]] [[Category:editing]] | ||
Revision as of 19:47, 5 January 2013
Author: Hans-Jürgen Schwarz
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Overview of the chapters on moisture
Introduction
Moisture content is an important parameter for the assessment of salt deterioration. It should therefore always be determined.
Several factors influence the water content of a material:
- The Materials themselves: Depending on the chemical composition, the porosity, the inner surfaces and their nature, each material has a different capacity to sorb moisture, both form air humidity (adsorption) or as liquid water (absorption).
- The Relative Humidity of the air: The higher the relative humidity, the higher the amount of moisture adsorbed by the material.
- Liquid Water Uptake: The presence of capillary pores in a material induces capillarity of liquid water when the surface is wetted by rain, fog, dew or in contact with a damp body, i.e., soils in the case of a building. In general, larger amounts of liquid water can be absorbed as compared to water vapor adsorption.