Moisture: Difference between revisions
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*[[Physical Principles of Moisture]] | *[[Physical Principles of Moisture]] | ||
** [[Equilibrium Moisture]] | ** [[Physical Principles of Moisture#Equilibrium Moisture|Equilibrium Moisture]] | ||
** [[Vapor Sorption]] | ** [[Physical Principles of Moisture#Vapor Sorption|Vapor Sorption]] | ||
** [[Water Absorption Coefficient]] | ** [[Physical Principles of Moisture#Water Absorption Coefficient|Water Absorption Coefficient]] | ||
*[[Moisture Measurement]] | *[[Moisture Measurement]] | ||
*[[Units for Moisture Measurement]] | *[[Units for Moisture Measurement]] | ||
| Line 20: | Line 20: | ||
Several factors influence the water content of a material: | Several factors influence the water content of a material: | ||
*The '''Materials''' themselves: Depending on | *The '''Materials''' themselves: Depending on their chemical composition, porosity, inner surface areas and texture, each material has a different capacity to sorb moisture, both from water vapor in the air (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. | * 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. | *'''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:editing]] | [[Category:Moisture Measurement]] [[Category:Schwarz,Hans-Jürgen]] [[Category:R-SLaue]] [[Category:editing]] | ||
Latest revision as of 12:32, 18 July 2023
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 their chemical composition, porosity, inner surface areas and texture, each material has a different capacity to sorb moisture, both from water vapor in the air (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.