Only done that once & it was hard going.
We had the concrete delivered ready mixed but they screwed up the delivery amount!
Consequently we had to work like crazy to mix approx 12 more loads in a cement mixer to top up the hole it was going into!
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It worked out well in the end though
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Had a similar experience pouring foundations for this
house on 20 Dec 2004. I had ordered 9 trucks and the 2nd arrival said, “I’m the last.”
“Ya what?!”
“Aye the Christmas Party has kicked off early. The plant is closing til 4th January.”
The significance of this was that I had open trenches in a stepped foundation and the certainty of rain in the intervening period. So, instead of pouring downhill and using uphill material to shift the lower stuff, pouring where needed, I had a manic time spreading a 500mm pour UPHILL everywhere to about 100mm to protect the hard base of the trench and create a horizontal cold join rather than a weak vertical one.
And THAT’S why I would have made my excuses if I had known what he’d planned if the crane was late!
He asked about the rest of the floor slab. I said “Get a concrete pump and some self levelling mix. I’m getting too old for this shit. I’ll spectate!” You have to have done it to understand the mix of effort against a ticking clock……
And Jan 2005 was a joy with the weather window lost and, and, and…..