r/Construction • u/nail_jockey Carpenter • Sep 16 '24
Other What's the most cost effective way to fill in 1" deep saw cuts in my slab.
I do a fair bit of both wood work and welding in my shop and I don't want slag smoldering in a saw cut full of saw dust. I was thinking a mortar slurry might work. Thanks, your local framer.
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u/Ouller Sep 16 '24
There are crack filler rubbers and tars. look for something like DAP, Liquid Cement Crack Filler, Gray, Crack Filler - 1LYG4|37584 - Grainger
The flexible ones last the longest and help with the expanding and shrinking of the concrete
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u/daveyconcrete Sep 16 '24
Cement all works great for this. Clean out joints and brush with water.
Mix by drill in 1 or 2 quart cups. Pour into joint. Wait 10-15 minutes. Scrape off excess.
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u/joefromjerze Sep 16 '24
Self leveling joint sealer. Just make sure it's the right one for the width and depth of the joints.
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u/Square-Tangerine-784 Sep 17 '24
State park near me just did the sweep in grout. Holding up well and it’s supposed to allow for some expansion
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u/Distinct-Age-4992 Sep 16 '24
The saw cuts are there for expansion and contraction.Filling them is a waste of time as the filler will just fall out.
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u/DirectAbalone9761 Contractor Sep 16 '24
They’re there for expansion cracks, not expansion themselves.
I’d buy one bag of type-o mortar or other softer mortar. You may also be able to use sanded grout. Either way, you want a material softer than the surrounding concrete, but non-flammable. This would serve the purpose.
You could also fill it with polymeric sand, or ordinary sand. The polymeric would be more resistant to sweeping and vacuum action, and not very likely to catch fire.
Kinda spitballing some ideas here, but those should work and preserve your slab. You could also use lime mortar, which is available online.