[TowerTalk] Concrete; Abosrbs water? Porous?

[D. Scott MacKenzie]

Yes - and it is a big problem.  The rebar rust, and the scale expands,
eventually causing the concrete to crack....

There are several write-ups that show nice pictures in "Corrosion
Engineering", published by the National Association of Corrosion Engineers
(NACE).

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com]On Behalf Of Pat Barthelow
Sent: Thursday, April 28, 2005 6:38 PM
To: jimlux at earthlink.net
Cc: towertalk at contesting.com
Subject: [TowerTalk] Concrete; Abosrbs water? Porous?


Jim Said:
>Almost all standards call for the rebar to be completely inside the
>concrete for just this reason.  You don't want a small crack exposed to
>allow water to infiltrate with capillary action.
>
>Jim, W6RMK

I may learn somethng here.....It is my gut level impression that buried
concrete in wet or damp ground absorbs moisture.  Isn't concrete porous,
easily absorbing water thorugh it's contact surface with wet ground?

73, Pat aa6eg at hotmail.com


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