Title says it all; I’m sure a thin layer of cement will be left over after they poor it all, and I would imagine that thin layer would harden and then the next time they use the mixer another thin layer would be leftover and so on and so forth. After a while I would imagine it would accumulate to the point where it renders the mixer unusable.
Why is this not the case?
In: Engineering
I’m not gonna scroll down all the way to see if someone has already said this.
After a clean dump the driver hoses everything down with water including inside the mixer. What’s left is diluted enough to not set up. In case a pour goes bad and it looks like they’re gonna get caught with a load in danger of setting up, sugar. Sugar will stop the chemical process that hardens the cement. I’ve seen them dump bags of sugar, kept ready just in case, into the mixer itself. Just keep adding sugar and water until it’s safe. I do oilfield work and normally there’s a roll off container or a half round tank that the operator dumps the diluted load into. Then they have vac trucks clean it up and dispose of. In smaller pours gone wrong ive seen operators even dumping bottles of mountain dew in it to slow the reaction. If that’s not done then yeah, hammer n chisel time.
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