[TowerTalk] Concrete with air.

[ve4xt at mts.net]

Hi Julio,

http://www.cement.org/basics/concretebasics_airentrained.asp

73, kelly
ve4xt
 
> From: "J.G.Castellano" <caste at sympatico.ca>
> Date: 2007/10/09 Tue PM 10:17:29 CDT
> To: <towertalk at contesting.com>
> Subject: [TowerTalk] Concrete with air.
> 
> Hello,
> 
> I am installing a Trylon tower and the foundation drawing calls for 
3,000PSI
> concrete (20MPa), when I explained what I was doing one of the 
concrete
> companies recommended 25Mpa with air. Can someone please 
explain what is the
> difference.
> 
> 73,
> Julio VE3FH
> 
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