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Old 11-05-2012, 08:35 PM   #1
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new concrete garage floor cuts w chipping


Newly poured concrete gargage floor 2 days ago was cut today by contractor. Cuts are a not as "clean" as i would expect. Cut edges have chips here and there along the edges. Should i be concered about the strength of the concrete? WOuld a dull blade contribute to this?

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Old 11-05-2012, 09:18 PM   #2
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new concrete garage floor cuts w chipping


I wouldn't worry about it. When they are cutting, just a slight movement side to side can cause a chip. The concrete is still a long way from hardening when it's that fresh. The chips I am talking about are very small. If you are getting big chips that are noticeable without looking too hard, then that's a different story. That would fall under sloppy workmanship.
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Old 11-07-2012, 01:11 AM   #3
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I wouldn't worry about it. When they are cutting, just a slight movement side to side can cause a chip. The concrete is still a long way from hardening when it's that fresh. The chips I am talking about are very small. If you are getting big chips that are noticeable without looking too hard, then that's a different story. That would fall under sloppy workmanship.
Mike Hawkins
Mike, thanks for your reply. Here's a pic of garage floor cut. What do you think?
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Old 11-07-2012, 08:57 AM   #4
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new concrete garage floor cuts w chipping


Those are a little bigger than they should be. But what's done is done. I wouldn't worry about it.
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Old 11-07-2012, 09:31 AM   #5
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new concrete garage floor cuts w chipping


Probably cut too late. I should be cut as soon as you can get access and no more than 24 hours after pouring.

Possibly the wrong type of blade.

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Old 11-09-2012, 04:27 PM   #6
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new concrete garage floor cuts w chipping


I wouldn't be too concerned about the strength of the concrete. Of course, I say that without seeing how it was poured, but that chip isn't really an indicator one way other the other.
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Old 11-10-2012, 12:24 PM   #7
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new concrete garage floor cuts w chipping


Cut too late, no issues other than cosmetic.
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Old 11-11-2012, 10:32 PM   #8
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Those are a little bigger than they should be. But what's done is done. I wouldn't worry about it.
Mike Hawkins
Thanks for the feedback
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Old 11-11-2012, 10:35 PM   #9
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I wouldn't be too concerned about the strength of the concrete. Of course, I say that without seeing how it was poured, but that chip isn't really an indicator one way other the other.
The concrete was poured when temps were flirting with freezing so they added calcium to the pour. Cutting took place about 4 days after the pour. Thanks for your feed back.
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Old 11-11-2012, 10:37 PM   #10
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Cut too late, no issues other than cosmetic.
Thanks for the feedback. It seemed like they waited longer than normal to come back to cut which was 4 days after pour.
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Old 11-12-2012, 11:40 AM   #11
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The concrete was poured when temps were flirting with freezing so they added calcium to the pour.
Was it calcium or a non-CC accelerator? If it was calcium, is there steel in the slab, either rebar or wire mesh? If so, keep an eye on it, calcium corrodes the steel at an accelerated rate. This could cause strength problems, and I've even seen the rust color show itself in walls and slabs.

Adding an accelerator is fine, as long as its used properly.

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