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Old 11-25-2011, 04:33 PM   #1
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Concrete curing question


I live in southern calif. On Sept 15th I had a slab poured on my driveway and it has blotches of the darker color it was when it was initially poured.Call it gray. Is this going to disappear over time meaning I was thinking it was not fully cured. Any thoughts?
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Old 11-25-2011, 05:07 PM   #2
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with fairly new slabs, its not uncommon to have variation in the color of the concrete. it can be from water coming out of the concrete as it cures or can be slight variation in the additives in teh concrete from the plant.. something like this is very minor when it comes to concrete.

if the concrete had a dye added to it to give some color then it could be a uneven mix..
too hard to tell with out seeing pictures of the slab
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Old 11-26-2011, 12:09 AM   #3
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Quote:
Originally Posted by Pawl View Post
I live in southern calif. On Sept 15th I had a slab poured on my driveway and it has blotches of the darker color it was when it was initially poured.Call it gray. Is this going to disappear over time meaning I was thinking it was not fully cured. Any thoughts?
By now the concrete is cured. It's possible that there is a water source(leak) under the slab keeping it dark.
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Old 11-26-2011, 01:38 PM   #4
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It's probably just moisture curing from the inside.
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Old 11-26-2011, 08:54 PM   #5
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Can you provide some pictures? It's been over two months so the slab should be pretty well cured! How thick is the slab?
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Old 11-27-2011, 09:41 PM   #6
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concrete curing


I live in placerville,ca.We pour concrete almost every day.most slab poures are on grade with 2-3 inches of rock.one out of 10 will not have a moisture problem.It can take at least a year or so for all areas to cure out even.All of the blotches will go away.I doubt if you have much moisture problems in southern ca.But if it is colored ready mix you may have a problem.DO NOT SEAL until all has cured out,or you will have a major problem by traping moisture in.Once cured you should apply a high end sealer.you will be glad you did.


we all no alot but can only do a little------an.
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