– How does leftover cement in cement trucks not harden and slowly accumulate in the mixer, essentially clogging it?

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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

41 Answers

Anonymous 0 Comments

I’m a former concrete truck driver. At the end of a job, the construction site usually has an area for me to rinse off my truck.

My truck has a water tank and a hose on it to rinse. I rinse off the chutes and rinse down the walls inside the barrel. The site usually doesn’t have a spot for me to dump excess concrete, so it gets taken back to my company’s property, where they have a designated concrete dumping site. I rinse the inside and empty it a few times.

Concrete still does accumulate inside. The truck needs constant chiseling during our downtime. We usually take a jackhammer to the inside of the drum during the winter when work is slow.

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