Mopped Tar Ashphalt - Sandblasting - Contractor Talk

Mopped Tar Ashphalt

 
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Old 02-10-2015, 10:35 AM   #1
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Mopped Tar Ashphalt


Has anyone ever dealt with removing mopped tar ashphalt from an inground pool. I have a request for Bid and I have never dealt with it.
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Old 02-10-2015, 02:08 PM   #2
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Re: Mopped Tar Ashphalt


In cold weather if it's not too thick it should blast off fairly well. In warm weather your screwed. Even in cold weather a air chisel works very well to remove the mass and then come back and abrasive blast to finish removing it.

Never ran into it in a pool but many years ago it was in a lot of water tanks. It could be well over two inches thick down in the belly portion of the tank and was a blasters worse nightmare.

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Old 02-10-2015, 02:17 PM   #3
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Re: Mopped Tar Ashphalt


If it's thin blast it off, if its thick scrape it first. If it has reinforcing in it scrape it.
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Old 02-10-2015, 02:21 PM   #4
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Re: Mopped Tar Ashphalt


What would be the best way to scrape it? It's about 4,000 sq. Ft. I'm told it's about an 1/8" thick.

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Old 02-10-2015, 02:26 PM   #5
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Re: Mopped Tar Ashphalt


Something like this would work well.

http://www.floor-equipment.com/parts...ar-detail.html

Walls, floor or both?

What is going to go on after the asphalt is scraped?
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Old 02-10-2015, 02:33 PM   #6
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Re: Mopped Tar Ashphalt


It's just on the walls and they're going to do some type of coating over it, I'm not sure what.
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Old 02-10-2015, 02:42 PM   #7
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Re: Mopped Tar Ashphalt


They may have some kind of primer for it also, once it is scraped of the heavy stuff they may be able to just prime it. I'd think blasting it after scraping will take a long time as they likely primed the concrete and that isn't known for coming off very easy.
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Old 02-11-2015, 08:57 PM   #8
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Re: Mopped Tar Ashphalt


Would dry ice work on that stuff.
had a local guy in the cement plants removing
old splash over, said the cold made it brittle and
came off in chunks.
would it work on tar the same??
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Old 02-11-2015, 09:11 PM   #9
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Re: Mopped Tar Ashphalt


I'm wondering this too. I have a call into cold jet to find out.
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Old 02-11-2015, 10:21 PM   #10
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Re: Mopped Tar Ashphalt


Not sure. It might do it. Pretty sure it would slow go, but might just do it.
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Old 02-12-2015, 06:45 AM   #11
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Re: Mopped Tar Ashphalt


If its cold out like penny said, electric hammer with a wide blade to take off
The heavy, then dry ice after ??
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Old 02-14-2015, 08:53 AM   #12
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Re: Mopped Tar Ashphalt


I did a small section at a fuel terminal on a tank . It came off nice with soda !! I gave them a price and they said they would think about it . I never got a call back . Price will change with warmer weather I have heard it's a bear to come off when hot .
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Old 02-15-2015, 10:42 AM   #13
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Re: Mopped Tar Ashphalt


Soda? Hmm that's interesting. Any idea how thick it was? How much area did you get done in what amount of time?
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Old 02-15-2015, 01:09 PM   #14
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Re: Mopped Tar Ashphalt


That would had to been some hard soda to of removed mopped on coal tar.
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Old 02-15-2015, 01:20 PM   #15
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Re: Mopped Tar Ashphalt


I imagine the soda was getting under the tar pretty easily and peeling it off. The surface may not have been prepped well before applying the tar.
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Old 02-15-2015, 03:22 PM   #16
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Re: Mopped Tar Ashphalt


Possible, but all the tar that I've been a part of on blasting wasn't that easy to come off. But these were mostly on the inside of potable water tanks and then the rest was inside of a coke plant where coke was produced. Lots and lots of coal slag was used. 10/40 and 12/40 mostly.
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Old 02-15-2015, 03:50 PM   #17
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Re: Mopped Tar Ashphalt


It was like 16 - 20 sq ft blasting it off tin structure . It was a spill over off a tank top . Also it was like 35 degrees

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