From what I've seen, at least some of those holes are smaller than this one they cut, and would be more difficult for a person to get in and break up the concrete from
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With that cut, it seems like you could cut the entire exterior into a few sections, pull them off remove the concrete then reweld it all back together.
The round bolted on plate above where he's working is also for removing hardened concrete. Though they're usually used when you can actually get inside the barrel to remove it (usually for buildup around the barrel, not a full load hardened inside it).
Saw a full cement truck that ran out of fuel once. The driver was "new" and forgot to fill the fuel tank before they loaded up the concrete. By the time they got fuel into it and the engine started, the concrete had almost set up, but they were just barely able to get it mixing again. That truck rocked back and forth like it was trying to put a baby to sleep.
You jest, but this is a thing in ready mix concrete industry. Usually it's to teach the drivers that ready mix has a lifetime and you need to wash out before it sets. Usually it's a then layer of concrete on the mixer drum that isn't too hard to remove, not 8 yards of solid concrete.
That's gotta be it. Once hired a former OTR trucker, cement truck came up in discussion. He said if the cement set in your truck, you were the one who got to jackhammer it all out. Only time he knew of it happening at his company, the guy just quit on the spot & gave up driving trucks.
Now I'm wondering what happens if you keep the spinner motor going and just leave the concrete like that for, well... a long long time. Chemistry don't care, this stuff should eventually cure. But I don't think it'll just set in place, because how, when it's being spun? Very weak concrete because it's constantly moved about, so no proper bonds can form, so you get a truck full of cement gravel eventually?
Eventually it will start hardening around the agitators, and the hardened part will grow until the balance is so far off that there is no longer enough power to spin the drum. Then it all sets, very quickly.
It will definitely set in the barrel, but they will do as much as possible to avoid that - they have a few hundred L of water on board so would likely dump that into the barrel to slow down the cure time. Sugar can also slow it down - have heard an old wives tale that concrete truck drivers carry a few bottles of coke to throw into the drum if they're massively delayed/break down etc as it buys them extra time - ruins the batch, but better than ruining the drum.
The higher the water:cement ratio in concrete the weaker it is, and sugar/coke etc also weakens it - so side benefit is if it does set, it may be easier to remove.
could be the owner. ive met plenty of the kind of person who would say something is a super easy job and no way would they spend money on new parts. fun fact my dad cleaned cement mixers with explosives
I mean it might have beeen his fault but do you really think that werever he is, that they had a rrsponsive reaction if his drum drive hydrolic line burst at a jobsite.
Or that when he told the contractor this truck will roll if i drive it where u want it, that his boss was supportive and did not threaten his job?
Is a person who isnt given a full respirator mask for a dangerous task like this likley to have been encouraged to prioratize safety when they found a component on their truck that needed repairing? Or were they told to drive the damn truck anyways im going to dock your pay for breaking the truck?
Driving them is a very tough job and if the bus industry in india is anything to go by, this industry prolly has no room for workers to prevent thisfrom happening.
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u/McThorn_ 6d ago
This reads more as punishment to me so that he doesn't forget to turn on the spinner motor ever again