what is the best way to repair this
what is the best way to repair this
(OP)
what is the best way to repair this column?
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what is the best way to repair this
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what is the best way to repair thiswhat is the best way to repair this(OP)
what is the best way to repair this column?
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RE: what is the best way to repair this
RE: what is the best way to repair this
First, determine cause of delamination. Is it rebar exfoliation/ expansion due to corrosion? Is it freeze-thaw? Is it reactive aggregate?
Once you've determined cause of issue, you can then decide repair method.
Assuming nothing insidious, chip all loose material, dowel into column, prep exposed rebar and gouge behind for keying, provide small rebar cage outside existing, form and place new concrete. Give plenty of clearance for proper placement and embedment. Make sure new concrete is dense and will reduce permeability to protect rebar.
Obviously make sure all ok structurally!
RE: what is the best way to repair this
Come on Ron... Epoxy would be great!
Mike McCann
MMC Engineering
RE: what is the best way to repair this
You may need shoring. I've done some concrete repairs on bridges that turned out to be more than what they appeared to be at first.
RE: what is the best way to repair this
BA
RE: what is the best way to repair this
RE: what is the best way to repair this
What chemical?
Mike McCann
MMC Engineering
RE: what is the best way to repair this
the column is very slender, bending or lateral force could cause the spalling. was there an earthquake? or did a forklift run into it?
RE: what is the best way to repair this
Mike McCann
MMC Engineering
RE: what is the best way to repair this
BA
RE: what is the best way to repair this
RE: what is the best way to repair this
Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin
RE: what is the best way to repair this
Dik
RE: what is the best way to repair this
VoD
RE: what is the best way to repair this
RE: what is the best way to repair this
RE: what is the best way to repair this
RE: what is the best way to repair this
Dik
RE: what is the best way to repair this
RE: what is the best way to repair this
Send a sample of the concrete cover for chloride and petrographic analysis.
RE: what is the best way to repair this
You may have lost sufficient section of the spiral to justify a good washdown and installation of new confinement steel before replacing the cover. If you want to add an FRP layer for confinement, you probably need to have a smoother surface and the existing steel needs protection from further corrosion (by replacing the cover.)
RE: what is the best way to repair this
A square column could work as well, which would provide a "form" to pour new concrete inside the HSS member as well if concrete is replaced.