Replacing hooked end of a rebar
Replacing hooked end of a rebar
(OP)
Please see the attached sketch. This is for a concrete renovation job where some concrete is spalling due to rebar corrosion. We have a few spots where the hooked end of a horizontal rebar has corroded and need to be replaced. The question is how do we make replace this bar. My solution is to drill next to the horizontal portion of this bar, and install a hooked dowel with Hilti HIT adhesive. This would decrease the depth of the required lap of the new and existing horizontal lengths. Does this sound like a reasonable solution? Any input would be greatly appreciated. Thanks,






RE: Replacing hooked end of a rebar
Are you demo'ing any of the concrete?
RE: Replacing hooked end of a rebar
Agree with you. The lap length is not reduced. Also, what is the fire rating of the epoxy?
RE: Replacing hooked end of a rebar
We are demoing the vertical face (@ hooked end) of concrete.
RE: Replacing hooked end of a rebar
If there are several isolated bars separated by a large distance, say four feet or morem I would just remove the corrosion and forget about it.
However, if there are several concentrated in a specific location, a more likely scenario, I would consider sawcutting in new slots for corner bars, not cutting any transverse steel, and epoxy in new corner bars.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Replacing hooked end of a rebar
RE: Replacing hooked end of a rebar
RE: Replacing hooked end of a rebar
RE: Replacing hooked end of a rebar
RE: Replacing hooked end of a rebar
I considered that too, but threading the rebar in place for the couplers, plus providing adequate concrete cover for couplers of a diameter larger than the bars they are joining would be a problem.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Replacing hooked end of a rebar
http://www.erico.com/products/LENTON_LOCK.asp
No bar end prep and not as bulky as other couplers.
RE: Replacing hooked end of a rebar
Not sure what they are called and my current connection is too slow to google it but there are couplers out there that form a stub end anchor that develops the full strength of the rebar.
RE: Replacing hooked end of a rebar
RE: Replacing hooked end of a rebar
As to why the rebar has to be replaced, there are some areas where the rebar has some corrosion and my concern is that even if its cleaned and patched back, it will corrode again.
Attached is an typical example of a rebar corrosion. Our typical detail says that if rebar section loss is more then 10%. then rebar has to replaced.
RE: Replacing hooked end of a rebar
RE: Replacing hooked end of a rebar
The type of thing i was talking about is as follows, not sure if there is a version out there that can be clamped rather than screwed on.
http://www.erico.com/products/Terminator.asp