– 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 used to work for an oilfield company that did Plug and Abandon work. Basically we took old wells that went below a certain production threshold and cut out the old pipes and pumped cement down to plug them back to certain EPA standards. The offshore mixers would routinely need to have someone with a pneumatic needle scaler go inside them and knock it clean. As the guy that did the job for awhile, they very much do get clogged up and someone is paid by the hour to knock it off.

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