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Re: Flyash

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Peder:

I suggest that you take a look at ACI 232.2R-96 (Use of Fly Ash in
Concrete).  This ACI document outlines many of the effects of fly ash on
concrete in both the "green" state and hardened state.  It will also give
some guidance on proportioning issues.

HTH,

Scott
Ypsilanti, MI


On Wed, 28 Aug 2002, Peder Golberg wrote:

> BlankI have an architectural client who wants to use between 35% and 50% flyash to replace the cement content in a slab on grade (with a w/c ratio of 0.40).   The slab will be covered with flooring that is very moisture sensitive and this amount of flyash is being recommended to the architects by the "green" designers.    I have always thought 20% was the maximum recommended and any more than this makes the finish work and curing not practical along with strength issues.
>
> Any have any good or bad experiences (or references) using this high amount of flyash content?
>
> Peder Golberg
> Portland, Oregon
>
>
>


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