Pictures
Pictures
(OP)
I designed an underground concrete structure this past winter that is now in construction; I have been going out and doing rebar inspections and watching concrete pours. During the pours I have noticed the contractor doing three things against the recommendations in the specs: dropping concrete approx. 14'-0" through the walls and rebar, placing approx. 7'-0" lifts in the walls, and flowing concrete approx. 6'-0" horizontally through the formwork with vibrators.
The problems regarding these issues have already been worked out with the owner and contractor but it still comes up when I'm out there. The contractor told me for the third time that its not in the spec so I said "you want to bet?" He said yes and here are the terms of the bet: If I can find how he violated the spec with the abovementioned procedures he buys pizza for his entire crew and I give a presentation on proper concrete placement. If I can't, I buy pizza for his entire crew and they get to point and laugh at me. I won.
Now I'm putting together a presentation about proper concrete placement techniques, going into the why's and how's and what happens if you don't, but I am looking for pictures that demonstrate what happens to concrete if not properly placed. I did some google searches but didn't really find what I was looking for. If anybody has pictures from projects they worked on and were willing to upload them and give a description of the situation it would be much appreciated. Also, if you have better Google skills than myself and can find pictures and can provide a link, that would be much appreciated as well.
The problems regarding these issues have already been worked out with the owner and contractor but it still comes up when I'm out there. The contractor told me for the third time that its not in the spec so I said "you want to bet?" He said yes and here are the terms of the bet: If I can find how he violated the spec with the abovementioned procedures he buys pizza for his entire crew and I give a presentation on proper concrete placement. If I can't, I buy pizza for his entire crew and they get to point and laugh at me. I won.
Now I'm putting together a presentation about proper concrete placement techniques, going into the why's and how's and what happens if you don't, but I am looking for pictures that demonstrate what happens to concrete if not properly placed. I did some google searches but didn't really find what I was looking for. If anybody has pictures from projects they worked on and were willing to upload them and give a description of the situation it would be much appreciated. Also, if you have better Google skills than myself and can find pictures and can provide a link, that would be much appreciated as well.





RE: Pictures
Is the ACI standard for formwork design specified? If so, I seem to recall there being a limit of 4' per hour for placing concrete in the forms (I'm not sure and my copy of the standard is at the office.) Maybe someone on the forum has a copy handy...
Dik
RE: Pictures
Dik
RE: Pictures
Not sure on the ACI standard... as for the pizza, anybody who provides a picture I use in the slideshow is more than welcome to stop by during the presentation to have some pizza courtesy of (insert construction company name here).
RE: Pictures
RE: Pictures
RE: Pictures
I have been meaning to shoot some emails to PCA and ACI but I've been pretty busy lately so have been forgetting. I should do that now.
RE: Pictures