cold joints in retaining wall
cold joints in retaining wall
(OP)
Question:
I have a horizontal cold joint in a retaining wall. Wall is about 1' thick, 20' long. Do you guys see any potential problem? The cold joint is due to concrete truck being late. NO shear key was put in. Please advise. Thanks.
I have a horizontal cold joint in a retaining wall. Wall is about 1' thick, 20' long. Do you guys see any potential problem? The cold joint is due to concrete truck being late. NO shear key was put in. Please advise. Thanks.






RE: cold joints in retaining wall
RE: cold joints in retaining wall
Article R11.7.1 says shear friction may be applied where it is considered appropriate to investigate shear transfer across a plane in structural concrete. To me. that means - in structures similar to the cases tested in the research leading to the code provisions. Apparently, the research addressed corbels and precast beam ledges. Do you know if the research tested slabs or walls.
PCA Notes on 318-02 says that shear friction reinforcement should be anchored in confined concrete. It goes on to say that confinement may be provided by column ties, "External" concrete, or special added reinforcement. I don't think slab or wall reinforcement is confined by the PCA definition.
RE: cold joints in retaining wall
The problem is that an owner would be willing to accept this sort of thing, rather than to reject it as not meeting the standard of care level expected of the industry. If the owner hasn't alredy accepted it without a pay decrease he probably will. And the point: it's not all about the money, will be lost forever.
Here we have something that not only looks like crap but will ultimately leak water and fine soil particles which will wind up staining the wall. Over time as water goes through freeze-thaw cycles (assuming it is such a climate) the cold joint will eventually open up to the point of requiring patch work.
Seems a shame that we have to accept that kind of garbage.
Regards,

Qshake
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RE: cold joints in retaining wall
DaveAtkins
RE: cold joints in retaining wall