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Calcium Carbide testing and Silicates
11-19-2012, 11:36 AM
Post: #50
RE: Calcium Carbide testing and Silicates
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Use a proper vapor retarder directly under the slab (no blotter layer).
Pour a well graded concrete mix (high strength /less cement).
Limit the amount of water not just W/C ratio (you can limit cement also).
Finish the concrete so it is left porous and breathes. (I have begun to add to my specs's - "perform a single steel pass to create a smooth finish, do not over finish concrete." )
Cure the concrete with water for 3 days only.
Eliminate re-wetting.
Promote drying with airflow and low humidity.
Test the slab using Wagner Rapid RH probes.
Glue directly to the concrete and enjoy.
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What would you add to this to limit curling? I know it isn't moisture but a big part of my issues with getting properly done slab on vapor membrane is limiting curling.

Side note: "evil flooring spirits" gave me a great chuckle. I didn't realize I had been missing out on such a good thread.
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RE: Calcium Carbide testing and Silicates - eaadams - 11-19-2012 11:36 AM