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Old 09-09-2011, 10:48 PM   #1
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drilling holes in concrete for rebar

need to replace some loose piece(about 1 ft long) in my foundation. I'd like to drill two holes in the old footing then epoxy 5/8 rebars into the holes.
what should I prepare the holes with so there'll be good adhesion? if using 5/8 rebar, what size drill bit should I use? what epoxy or resin should I get? thx


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Old 09-10-2011, 01:50 AM   #2
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Old 09-10-2011, 06:40 AM   #3
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For 5/8" rebar, you'll wan to drill 3/4" blow the holes out extremely well with compressed air, using a wire brush-pipe cleaner in with the air is even better.

Not sure what you have access to locally, but our local hardware store even has epoxy, as well as the big box stores.
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Old 09-10-2011, 08:08 AM   #4
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You want to go to this much trouble for one foot of rebar? Seems extreme.
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Old 09-10-2011, 09:06 AM   #5
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when you use epoxy make sure you are using the right one for the job, you will need Structural epoxy, it is expensive but the right stuff and can be baught at the Depot usually in the lumber section where they have the simpson products
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Old 09-10-2011, 09:12 AM   #6
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I get epoxies direct from Abatron. www.abatron.com. They will have better products and a wider range than box stores for sure. I've used them for years but as suggested, your local building supplier may have structural epoxies. If you buy box store stuff, make sure it is still within date range. They are notorious for not rotating inventories on things like epoxies and you can have a real disaster with an epoxy that it is out of date and refusing to ever cure.


Last edited by user1007; 09-10-2011 at 09:15 AM.
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