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Old 06-14-2012, 04:00 PM   #1
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Exposed aggregate advice....


Hi there,

I'm planning on creating a step walkway with 1' x 3' rectangles of exposed aggregate pads. I've read quite a bit about it but I was wondering if anyone has any advice. I'm going to mix my own concrete so I'll be able to control how fast I go. I've ready some things about using a retarder mix or mountain dew to allow the aggregate to get the correct depth. I'm assuming this is done when you are doing large areas. Am I correct? Also, I read something about only using a magnesium float and not steel. Not sure what that's about either. Can anyone shed some light?

Thanks, Chris

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Old 06-16-2012, 06:43 AM   #2
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Exposed aggregate advice....


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Originally Posted by stupid48 View Post
Hi there,

I'm planning on creating a step walkway with 1' x 3' rectangles of exposed aggregate pads. I've read quite a bit about it but I was wondering if anyone has any advice. I'm going to mix my own concrete so I'll be able to control how fast I go. I've ready some things about using a retarder mix or mountain dew to allow the aggregate to get the correct depth. I'm assuming this is done when you are doing large areas. Am I correct? Also, I read something about only using a magnesium float and not steel. Not sure what that's about either. Can anyone shed some light?

Thanks, Chris
Ayuh,.... You won't need a Mag, as it brings up the snot in the concrete, 'n yer gonna be washin' the snot Off the top, for exposed stones...

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Old 06-16-2012, 02:30 PM   #3
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Exposed aggregate advice....


I don't have any of the mix designs in front of me, so I can't say precisely what you mean about the correct depth. We don't use retarders, generally, although the mid-range water reducers retard it slightly. More often, a contractor will add accelerator to the mix so they aren't on the job until midnight.

If you've got your mix design, pour it and finish it like normal. Then the guys will spray a molasses and water mixture over the top (lightly!), and wait. I'm not sure how long, I'm usually long gone by the time it gets exposed. Then spray it off with water, and Bob's your uncle.
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Old 06-17-2012, 10:49 AM   #4
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Exposed aggregate advice....


Spray with reducer, cover with plastic, come back next day and spray with water hose. Easy as pie. GL
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Old 06-17-2012, 06:18 PM   #5
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Exposed aggregate advice....


Our back deck is exposed aggragate, it is very rough and you cant even walk on it because it is so rough, we want to smooth it out someway. We have talked to several people and they say there is nothing we can do. One contractor told us he could put a thin layer of concrete over this and change the color also. Is there anything to smooth this stuff out? And also change the color.
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Old 06-17-2012, 08:56 PM   #6
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Our back deck is exposed aggragate, it is very rough and you cant even walk on it because it is so rough, we want to smooth it out someway. We have talked to several people and they say there is nothing we can do. One contractor told us he could put a thin layer of concrete over this and change the color also. Is there anything to smooth this stuff out? And also change the color.


Did that contractor also tell you that his work will last a year maybe 2 if your lucky.
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Old 06-18-2012, 10:18 AM   #7
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Exposed aggregate advice....


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Our back deck is exposed aggragate, it is very rough and you cant even walk on it because it is so rough, we want to smooth it out someway. We have talked to several people and they say there is nothing we can do. One contractor told us he could put a thin layer of concrete over this and change the color also. Is there anything to smooth this stuff out? And also change the color.
In this case, I'd just hide it by building a wooden deck over it. Trex can be your friend.

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