Talk:Water Absorption Coefficient: Difference between revisions
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Author: [[user:Hschwarz|Hans-Jürgen Schwarz]] | Author: [[user:Hschwarz|Hans-Jürgen Schwarz]] | ||
<br> | <br> | ||
English Translation by [[user:SLeithaeuser|Sandra Leithäuser]]<br> | |||
back to [[Physical Principles of Moisture|Physical Principles of Moisture]] | back to [[Physical Principles of Moisture|Physical Principles of Moisture]] | ||
<br> | <br> | ||
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== Introduction == | == Introduction == | ||
The water absorption coefficient w is used for measuring at which | The water absorption coefficient ''w'' is used for measuring the rate at which a building material absorbs water: | ||
<math> w= \frac {W[kg/m^2]}{\sqrt{t}[h^{0.5}]}</math> | <math> w= \frac {W[kg/m^2]}{\sqrt{t}[h^{0.5}]}</math> | ||
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(in kg/(m2*h0.5))<ref> http://www.uni-due.de/ibpm/Bauphysik-Interaktiv/nh_fe_wasserauf1.htm</ref><ref>http://www.kbb-weber.de/files/Wasseraufnahme.pdf</ref>: | (in kg/(m2*h0.5))<ref> http://www.uni-due.de/ibpm/Bauphysik-Interaktiv/nh_fe_wasserauf1.htm</ref><ref>http://www.kbb-weber.de/files/Wasseraufnahme.pdf</ref>: | ||
'''Please double check!!!'''*water absorbent (w > 2) | '''Please double check!!!''' | ||
*water absorbent (w > 2) | |||
*water inhibiting (w < 2) | *water inhibiting (w < 2) | ||
*water repellent (w < 0.5) | *water repellent (w < 0.5) | ||
Latest revision as of 23:10, 1 February 2013
Author: Hans-Jürgen Schwarz
English Translation by Sandra Leithäuser
back to Physical Principles of Moisture
Introduction
The water absorption coefficient w is used for measuring the rate at which a building material absorbs water:
![{\displaystyle w={\frac {W[kg/m^{2}]}{{\sqrt {t}}[h^{0.5}]}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/43e0f5c226426e468af5b931d4c4dc7de8676010)
W = amount of water [kg/m²], t = time in [h]
The water absorption coefficient indicates, how many kg of water per hour one square meter of material absorbs through capillary action.
| The water absorption coefficient is used to measure the rate of moisture absorption of building materials. |
Most common is the following classification of the water absorption coefficient (in kg/(m2*h0.5))[1][2]:
Please double check!!!
- water absorbent (w > 2)
- water inhibiting (w < 2)
- water repellent (w < 0.5)
- waterproof (w < 0.001)
Weblinks
Literature
There were no citations found in the article. --SLeithaeuser 14:50, 20 January 2013 (CET)