Moisture

<bibimport/> Author: Hans-Jürgen Schwarz

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Overview of the chapters on moisture

• Physical Principles of Moisture
  • Equilibrium moisture
  • Vapor Sorption
  • Water absorption coefficient
• units of measurement of moisture
• Measurement of moisture

Introduction

The moisture content is an important parameter for the assessment of salt and moisture damage. It should therefore always be known and should be determined.

Several factors influence the water content of a material:

• TheMaterials themselves: Depending on the chemical composition, the porosity, the inner surfaces and their composition each material has a different capacity to absorb moisture, both form air humidity or as liquid water.
• Therelative humidity: Water absoption from the air is moslty a funktion of the relative humidity. The higher the relative humidity, the more moisture is absorbed from the air.
• Liquid Water Uptake: In addition to the absorption of water from the air it can be taken up in considerable amounts in the liquid phase of rain, condensation and rising damp.