Concrete Slab Surface

 
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Old 09-08-2017, 09:28 PM   #1
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Concrete Slab Surface




This is the surface of a slab just poured for me. I've never seen this before. What's going on?
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Old 09-08-2017, 11:38 PM   #2
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Re: Concrete Slab Surface


Have you used this sub before?

What kind of trade is "general"?

Are you actually a contractor?

Did you post an intro?

Have you had the slab tested for Leprosy?



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Old 09-09-2017, 02:05 AM   #3
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Re: Concrete Slab Surface


Quote:
Originally Posted by Seven-Delta-FortyOne View Post
Have you used this sub before?



What kind of trade is "general"?



Are you actually a contractor?



Did you post an intro?



Have you had the slab tested for Leprosy?







Delta


I've seen my share of slabs, I can tell you that's leprosy.


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Old 09-15-2017, 11:11 PM   #4
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Re: Concrete Slab Surface


they troweled in the bleed off be my guess
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Old 09-16-2017, 12:04 AM   #5
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Re: Concrete Slab Surface


How much did it cost to get the camo pattern stamped into your driveway?


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Old 09-16-2017, 07:12 PM   #6
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Re: Concrete Slab Surface


That is awesome looking. I bet that cost extra.
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Old 09-18-2017, 09:43 AM   #7
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Re: Concrete Slab Surface


Looks bad and will never look good. If it is a finished floor the buyer will look at forever, it needs to be removed and replaced.
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Old 10-10-2017, 10:17 PM   #8
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Re: Concrete Slab Surface


It does look pretty rough... Never had this happen before, but definitely heard of it.
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Old 10-10-2017, 11:09 PM   #9
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Re: Concrete Slab Surface


Eh, it'll buff out boys!
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Old 10-11-2017, 08:02 AM   #10
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Re: Concrete Slab Surface


Was the slab covered with plastic? That would also cause dark and light spots in the area of contact and non-contact, I think there is a term for that it's called "greenhouse effect".

Delayed or early finishing in bleed water would also cause that or hard troweling....
You would also see something like this because of calcium chloride when it retards the ferrite phase of the cement. The ferrite phase tends to remain dark in the presence of calcium chloride and cold weather usually would increase the discolloration effect.

Talk to your contractor who did the job, and find out wtf they did.

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