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Re: Concrete (Slab on Grade) Curing

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Harold ---

In my experience, the liquid curing compounds are never applied "per
manufacturer's directions".   An untrained workman makes one pass, then
returns all the remainder of the liquid to the original container.   When
you check the mfr's recommended spread rate, you will usually find that
it will take 3-5 passes to do a full application.   Contractors are
invariably miffed that anyone could be so anal, but when done with a full
application rate, they do work very well.  Ironically, it is still the
cheapest method.  

The only potential drawback is if the materials are incompatible with the
final uses for the concrete surfaces.   I either specify, or request an
advanced submittal and do a careful review.

--- Russ

> Lastly is the liquid membrane cure because it is not as effective.  
> The
> advantage is it is the cheapest.  The problem is that you can get 
> voids in
> the coverage.  If you do use a liquid applied membrane, use 2 
> applications.
> Have the surface sprayed in one direction at about half the rate of
> coverage, then provide a second application 90 degrees to the first 
> one.  
> Regards,
> Harold O. Sprague

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