Moisture: Difference between revisions
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== Introduction== | == 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: | Several factors influence the water content of a material: | ||
*The '''Materials''' themselves: Depending on the chemical composition, the porosity, the inner surfaces and their | *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''': Water adsoption from the air is mostly a function of the relative humidity. The higher the relative humidity, the higher the amount of moisture afsorbed by the mateiral. | * The '''Relative Humidity''': Water adsoption from the air is mostly a function of the relative humidity. The higher the relative humidity, the higher the amount of moisture afsorbed by the mateiral. | ||
*'''Liquid Water Uptake''': Materials, due to their porosity will absorb liquid water when wetted by rain, fog, dew and rising damp. In general, larger amounts of liquid water can be absorbed as compared to water vapor adsorption. | *'''Liquid Water Uptake''': Materials, due to their porosity will absorb liquid water when wetted by rain, fog, dew and rising damp. 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:inReview]] | [[Category:Moisture Measurement]] [[Category:Schwarz,Hans-Jürgen]] [[Category:R-SLaue]] [[Category:inReview]] | ||
Revision as of 19:40, 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: Water adsoption from the air is mostly a function of the relative humidity. The higher the relative humidity, the higher the amount of moisture afsorbed by the mateiral.
- Liquid Water Uptake: Materials, due to their porosity will absorb liquid water when wetted by rain, fog, dew and rising damp. In general, larger amounts of liquid water can be absorbed as compared to water vapor adsorption.