[Diy_efi] ever poured a large slab?

[bearbvd at mindspring.com]

Original Message:
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From: Rick McLeod dunvegan at sbcglobal.net
Date: Fri, 20 Jul 2007 08:49:40 -0700 (PDT)
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] ever poured a large slab?


I think you're confusing screed w/ float.


First of all--decent floats are Mag, not Al. The cement reacts differently
to Mag than Al.

Second--if you're going to a rental yard, rent a Mag screed bar as WELL as
a Mag float.

The finish will come out MUCH better if the right tools are used.

Also--recommend NEVER using a 'jitterbug'--the mesh, expanded metal thing,
flat or on a roller, used to push the large aggregate a bit below the
surface. If a slab is jitterbugged, ESPECIALLY in a cold climate, it is FAR
more likely that the surface will 'spall' later. (Spalling = chunks of
surface flaking off.)

Greg

Greg

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