[Diy_efi] ever poured a large slab?

[Steve Ravet]

I had some spalling on the 10x20 slab I did last year but didn't use
anything like what you described.  Just screed, 3' float, then hand
trowel.  What causes the spalling?

I think I've decided to do the forms myself and hire the concrete work.
Or at least to call and get estimates.

How about epoxy or other floor finishes?  Anyone used them in a garage?

BTW the final plans include enough space to park 2 cars end to end, with
the furthest back space having a 4 post Eagle lift.  Can't wait to have
it all set up :-)

--steve

> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org 
> [mailto:diy_efi-bounces at diy-efi.org] On Behalf Of 
> bearbvd at mindspring.com
> Sent: Friday, July 20, 2007 11:40 AM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] ever poured a large slab?
> 
> 
> 
> Original Message:
> -----------------
> 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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