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RE: Fly ash

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Definitely.  Concrete with fly ash will take longer to cure/set, thus one
should plan for a longer period of curing.

HTH,

Scott
Ypsilanti, MI


On Wed, 28 Aug 2002, Sherman, William wrote:

> some applications. I would recommend longer wet curing time with higher fly
> ash contents.
>
>
> -----Original Message-----
> From: Peder Golberg [mailto:peder(--nospam--at)jgpierson.com]
> Sent: Wednesday, August 28, 2002 4:09 PM
> To: seaint(--nospam--at)seaint.org
> Subject: Flyash
>
>
> I 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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