-gm
Joe,
Federal Publication EM 1110-2-2000 is at http://140.194.76.129/publications/eng-manuals/em1110-2-2000/toc.htm.
It is Concrete for Civil Works and has discussions of fly ash and alkali-silica reactions. It also helps with strength and permeability (decrease). VDOT loves it for the alkali-silica reaction which causes those fine numerous cracks.
A Structural Engineer, P.C.
Glenn C. Otto, P.E.
Virginia Beach, VA 23454
-----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