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rodeair 04-08-2011 12:25 PM

Pouring Hearth Slab
I am ready to pour my hearth slab which will be about 6.5 x 7.5 feet. My question concerns the gaps around the plywood and small gaps between the form and a few of the block. Do I need to fill the gaps with something, or will the concrete stay out of the smaller gaps?

Paul in Rockwall TX 04-08-2011 02:39 PM

Re: Pouring Hearth Slab
depends on the size of the gaps and the size of the aggregate in the concrete mix. If it's peastone, the the gap should be smaller than that.

dmun 04-08-2011 03:39 PM

Re: Pouring Hearth Slab
Duct or masking tape will fill any voids. It may not be necessary, but it's impossible to fix once sludge starts running down the sides of your forms.

rodeair 04-08-2011 06:14 PM

Re: Pouring Hearth Slab
Thank you for the replies. I will use my favorite product in the world, (duct tape) to be safe. The concrete truck is due tomorrow morning so I'll post the results on my thread in the Pompeii Construction section. I very much respect both of you guys. Thanks again.


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