Sorry mate but Ivor is right here and you're wrong.
Concrete mix for footings...
- Thread starter James Davis
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I've just found some photos I took during the pour. So you can see the best laid plans in place with the DPM, bars and feet, and a lot of the feet intact around the edge areas with the concrete probably going about 50mm below the bars. But then the later pic showing some of the feet squashed - not all of them were, just on the main barrow route. However, the bars are still off the bottom even there. Thinking about it now, even with those unhelpful pieces of squashed plastic being in the mix, being a 150mm slab, there looks to be a good 110mm of concrete above that level anyway, plus the bottom 40mm of concrete below, reinforced by the bars. So whilst I wouldn't do it this way again, I'm not worried either.
Don't be daft.
I suspect the term "cold joint" is not in your vocabulary?
Joint? What joint? It's all the same pour, there is no joint.
To me the concrete looks green enough to bond properly, although I wasn't on site.
It's all a fresh pour, beneath and on top. No different to any other scenario.
Trolling for the sake of it.
He took that photo after he'd just got back from a round of golf.
As long as it took less than 2hrs and wasn't a hot day no problem
Golf is a weekend thing for me now. I haven't been able to play on a work day for years, unless I'm not actually working. I have to come home these days and let my back muscles 'cool off' before I can even take a shower.
That concrete beneath the the fabric is less than an hour old.
I suggest you (who needs educating on this notion) and any others who prefer facts rather than wild statements simply google cold joints in concrete.
After all what do I know: I've been involved with well over 10,000cum of concrete over the years and spent 10 years lecturing City & Guilds Concrete Technology.
There is no joint. All your trolling won't change that fact.
Those who can - do.
Those who can't - teach.
The fact that there are planks on top of the rebar mesh, presumably to walk on or to roll barrows, gives away the fact that the concrete beneath has definitely gone off.
Obviously it's not going to explode and is probably absolutely fine. But it will be much weaker than if it was done conventionally. If this was acceptable then why would those commercially making reinforced concrete go to all the trouble of assembling the stuff with chairs beneath? If they could chuck half in, lob the rebar on top then chuck the rest in then everyone would do it. Do you really think that everyone else is a bit daft and just hasn't had your genius brainwave? Or have you (ever) considered the possibility that perhaps someone knows something you don't?
I learn loads from here. I chip where I think I can help, and will admit if I was wrong. Collaboration works, the best ideas win, it doesn't matter whose they are. Your username of "knows all" appears to be revealing of your attitude.
Obviously it's not going to explode and is probably absolutely fine. But it will be much weaker than if it was done conventionally. If this was acceptable then why would those commercially making reinforced concrete go to all the trouble of assembling the stuff with chairs beneath? If they could chuck half in, lob the rebar on top then chuck the rest in then everyone would do it. Do you really think that everyone else is a bit daft and just hasn't had your genius brainwave? Or have you (ever) considered the possibility that perhaps someone knows something you don't?
I learn loads from here. I chip where I think I can help, and will admit if I was wrong. Collaboration works, the best ideas win, it doesn't matter whose they are. Your username of "knows all" appears to be revealing of your attitude.
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Or it was a stiff mix around the 0.45 water cement ratio as opposed to the runny mix some use to make things flow easier?
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