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Re: High Fly-Ash in PT slab[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: Re: High Fly-Ash in PT slab
- From: "Gerard Madden, SE" <gmse4603(--nospam--at)gmail.com>
- Date: Fri, 7 Aug 2009 16:17:01 -0700
Use Slag instead of Fly Ash.
Federal Publication EM 1110-2-2000 is at http://18.104.22.168/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
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?
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