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Re: High Fly-Ash in PT slab

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Check with the local Concrete Batch Plants ...ones that may get the job and see if they have any mix designs that they may have used on other projects. If you find a mix that may be acceptable get copies of test results from the previous job and go from there....
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
In a message dated 8/7/2009 9:42:27 A.M. Pacific Daylight Time, jgoldbronn(--nospam--at) writes:

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