TxDot has evolved a good experience history and spec for fly ash. The spec,
source('s), and chemistry seems to be the key (when isn't it). Without a
good spec and tight control of the materials you'll have problems.
A great deal of work has also be done at the Univ. of Texas on this as well.
No doubt there are several other sources of experience as well. A simple
starting point might be to look at a TxDot spec. You should visit
www.dot.state.tx.us and search on "fly ash".
----- Original Message -----
From: Dee Henrie <dee(--nospam--at)adamsmithinc.com>
Sent: Sunday, June 06, 1999 3:26 PM
Subject: RE: Portlands vs. Blended Hydraulics
> Although I am in steel construction, I attend construction coordination
> meeting regularly. The question came up regarding the addition of fly ash
> and why it was not allowed on this particular project. The Owners Rep.
> had a bad experience with it and would not allow it and the Structural
> Design Engineer said it was company policy not to allow it. I can
> understand the Owners rep comment, but the Engineers was interesting. My
> point before I ramble much farther and expose my ignorance is this.
> Does the addition of fly ash provide an improved Concrete, and in
> what area's?
> In Durability
> Crack resistance
> Freeze thaw breakdown resistance
> Alkalinity improvement (reduce carbonation)
> I look forward to the final word on this.
> Dee Henrie
> Adams & Smith Inc.