Denray Posted January 21, 2012 Report Share Posted January 21, 2012 What should be done about situations like this where the rebar is exposed and rusting in the perimeter foundation? Click to Enlarge 82.89 KB Link to comment Share on other sites More sharing options...
Jim Katen Posted January 21, 2012 Report Share Posted January 21, 2012 What should be done about situations like this where the rebar is exposed and rusting in the perimeter foundation? Sand blast, epoxy, & grout. Link to comment Share on other sites More sharing options...
Denray Posted January 21, 2012 Author Report Share Posted January 21, 2012 Thanks Jim, No special treatment to the rebar to stop rusting. I suppose the rebar rusted because it was too close to the exterior. Link to comment Share on other sites More sharing options...
Jim Katen Posted January 21, 2012 Report Share Posted January 21, 2012 Thanks Jim, No special treatment to the rebar to stop rusting. I suppose the rebar rusted because it was too close to the exterior. Oh yeah, fix the water problem, *then* sandblast, epoxy, & grout. If it's just an isolated instance, I wouldn't get too worked up about it. It can get tricky when you've got a high-rise full of this kind of failure, though. Link to comment Share on other sites More sharing options...
kurt Posted January 22, 2012 Report Share Posted January 22, 2012 Yes, it does. All those 60's high rises that were built without coated rebar are going through 5, 10, or 15+ million dollar repairs. Dig out the corrosion, reset epoxy coated bar in the wall, then cast concrete patches over the mess. There's a reason the new rebar is polymer coated. Link to comment Share on other sites More sharing options...
Jim Katen Posted January 22, 2012 Report Share Posted January 22, 2012 These are from a condo complex built in -- yes, you guessed it, 1981. Only a few hundred units, but the damn things add up. The cantilevered balconies are blowing up at the outboard edges. What a mess. Click to Enlarge 35.96 KB Click to Enlarge 52.9 KB Link to comment Share on other sites More sharing options...
mgbinspect Posted January 22, 2012 Report Share Posted January 22, 2012 Not to mention rebar is never supposed to be closer than 1.5" to the surface of concrete - a sloppy installation doomed from the start. Link to comment Share on other sites More sharing options...
Jim Katen Posted January 22, 2012 Report Share Posted January 22, 2012 Not to mention rebar is never supposed to be closer than 1.5" to the surface of concrete - a sloppy installation doomed from the start. Then you'll particularly enjoy this one: Click to Enlarge 29.54 KB Click to Enlarge 32.65 KB This was a brand new 5-story high rise with post-tensioned slabs. The photos show the underside of the PT floors. Can you spot the problem? I have no idea how they dealt with this one. I was just inspected a single condo unit, so I don't know how widespread the problem was. Link to comment Share on other sites More sharing options...
Denray Posted January 22, 2012 Author Report Share Posted January 22, 2012 Vertical in the first and horizontal in the second. Nice photos. Link to comment Share on other sites More sharing options...
mgbinspect Posted January 22, 2012 Report Share Posted January 22, 2012 Yeah, not only is it more prone to rust, etc., but structurally speaking, it is supposed to be well into the concrete to work properly in harmony. I hated reinforced steel concrete construction - not fun, and I've got some wicked scars from being lacerated by it in merely walking by. Link to comment Share on other sites More sharing options...
Jim Katen Posted January 22, 2012 Report Share Posted January 22, 2012 Vertical in the first and horizontal in the second. Nice photos. Actually, they're all running the same way, I just turned the camera for the close up. It was a bad choice. Link to comment Share on other sites More sharing options...
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