I’ve never specified “high fly ash”, but around in this area the power company dumped it as a landfill for a golf course. Now the groundwater is contaminated with toxic chemicals and the lawsuits have started. I spec’d out some fly-ash for a municipal job fairly recently and the fly-ash was not allowed.
A Structural Engineer, P.C.
Glenn C. Otto, P.E.
Virginia Beach, VA
-----Original Message-----
From: Joe Goldbronn [mailto:jgoldbronn@barrish.com]
Sent: Friday, August 07, 2009 12:48 PM
To: seaint@seaint.org
Subject: High Fly-Ash in PT slab
I have a client that is trying to maximize their “Build-it-Green” points by using high fly-ash in the concrete mix. They are requesting between 20%-30% fly-ash. Per the soils engineer we also need to use a slab-on-grade post-tensioned slab. I have never tried to use high fly-ash on a post-tensioned slab before and am having a hard time finding anyone or any reference that has done so. Does anyone have any experience with this or know of any good references?
Joe Goldbronn