critical water content of materials

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Tobias
WUFI User
WUFI User
Posts: 9
Joined: Thu Oct 07, 2021 11:32 pm -1100

critical water content of materials

Post by Tobias » Fri Oct 15, 2021 2:50 am -1100

Hi,
I wanted to know if there were data on wufi concerning the critical water content beyond which the material can be damaged (mechanical properties degraded, crystallization of salt...). For example, I read on the Internet that there are criteria such as the fact that it is recommended not to exceed 4 to 5 kg/m^3 of water content for mineral wools or that the water content of concrete must remain below its water content at equilibrium with 85% relative humidity. Nonetheless I wanted to know there were more precise values of critical water content in Wufi or if you knew sources that gave this kind of information ?
Kind regards
Tobias

Thomas
WUFI Administrator
WUFI Administrator
Posts: 337
Joined: Sun Jun 19, 2005 10:33 pm -1100

Re: critical water content of materials

Post by Thomas » Mon Oct 18, 2021 2:44 am -1100

Hi Tobias,

yes, this is an important question because WUFI's results only describe temperatures, water contents etc in the construction, but the user is usually interested in an assessment about the performance or durability of the construction.

For this purpose, information about allowed limits with respect to various damage mechanisms is needed. Unfortunately, not much is known about these limits at present, this is an area of current research. For a discussion of possible damage mechanisms and existing knowledge about admissible limits, please see the topic

"Appendix | Assessment Criteria"

in WUFI's help file, or (with identical content) the topic

Analysis, interpretation and assessment of the calculation results

here in the WUFI forum.

Kind regards,
Thomas

Tobias
WUFI User
WUFI User
Posts: 9
Joined: Thu Oct 07, 2021 11:32 pm -1100

Re: critical water content of materials

Post by Tobias » Mon Oct 18, 2021 3:37 am -1100

Hi Thomas,
Thank you for your answer!
Kind regards
Tobias

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