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Humidity variation within a concrete cross-section

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ridgeline

Civil/Environmental
May 29, 2008
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Hello,

I was hoping someone that is much more skilled at math than I could help me interpret the attached equation. Basically, I am trying to understand how humidity will vary through a cross-section of concrete. I understand concrete diffusivity 'C' will degrade with time and may be represented in units of mm^2/day.

So if I am able to choose 'C' based on some time 't', what does the variation of 'h' across 'x' look like? Do the squared terms mean 'h' varies as a square of 'x'?

 
 https://files.engineering.com/getfile.aspx?folder=4ea3fefa-67e1-472a-bff6-efd076cb92af&file=Eqn.jpg
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