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Stopped a high-rise job because nobody checked the concrete mix temps
Last Tuesday we were pouring a 12th floor slab and I noticed the truck driver looking real nervous. Turns out the mix was sitting at 95 degrees and nobody had checked it since it left the plant. I told the foreman we were done until we got a revised mix design and a cooler day. You can't just ignore ACI 305 when you're 150 feet up with 80 yards of concrete. Has anyone else had to shut down a pour over temperature specs?
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lindaw293mo ago
Yeah, nothing says "great day on site" like watching 80 yards of hot soup set up wrong 12 floors up. Hope that foreman learned to check his thermometer before the sun does.
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beth_hunt3mo ago
That 80 yards of mud going bad up high is a nightmare. I saw a crew once lose a whole morning because their concrete truck showed up an hour late and the mix started setting in the lines. They ended up with a cold joint halfway through the pour and had to jackhammer out a section the next day. A good foreman always checks his temps before the sun gets on that stuff. How did they even get that much concrete up there without catching the problem sooner?
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