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Cement Mixer/Dried Concrete

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walt

10-03-2000 17:44:26




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Anyone know a good method to remove dried concrete from inside a mixer? Besides beating the sides of the drum with a hammer? Lots of Muridic Acid and let sit? Any help appreciated.




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walt(solution)

10-04-2000 19:43:37




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 Re: Cement Mixer/Dried Concrete in reply to walt, 10-03-2000 17:44:26  
Busted up some brick in large chunks. Added some water, and let the mixer go for a couple of hours. Worked like a rock tumbler. Hope this helps someone else. GREAT BOARD!!



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Joe Evans

10-03-2000 20:26:22




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 Re: Cement Mixer/Dried Concrete in reply to walt, 10-03-2000 17:44:26  
This may sound whacky but it worked for me. Our company had mixed thousands of pounds of epoxy- based grout in a rented mixer. The guys mixing the grout were not good at housekeeping, and a prodigious amount of build up was left in the mixer. Epoxy grout may as well be steel when it comes time to chip it out of something. After a solid day of working on it with a pneumatic chipping hammer, it looked like we were going to have to buy the mixer ($1,800) from the rental outfit because I was having no success. I decided to build a fire in the mixer using scrap lumber. The fire burned away the epoxy resin and left behind a very friable material that easily scraped out. The smoke from the burning epoxy material was enough to alert Red Adair. It also released the bond between prior layers of standard cement and the drum steel. This was best removed when the drum was still hot. The fire didn't do much good to the shaft seals and the paint job, but those were readily repaired. I'm not endorsing this--just telling you what worked for me. Be careful and use discretion when burning. Use safety glasses too because the cement will spall off and fly around. You could always keep some steaks handy so you can explain to the local Basement Savers why you got a fire going in the huge cooker with an industrial sized spit. Joe Evans

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paul

10-04-2000 20:34:16




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 Re: Re: Cement Mixer/Dried Concrete in reply to Joe Evans, 10-03-2000 20:26:22  
Yea, I noticed when we had to torch a bearing sleeve on the mixer it spalled the concrete off - observe the safty warnings with this!

--->Paul



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Larry Garbarek

10-05-2000 08:10:50




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 Re: Re: Re: Cement Mixer/Dried Concrete in reply to paul, 10-04-2000 20:34:16  
Years ago, used to sell Rex concrete mixers and visited readymix plants frequently.

They always had a mixer or two laying around that was full of hardened concrete, from accidents or other reasons.

Back then, they had to jack hammer the hardened concrete out of the drums, even going through the trouble of cutting open a hatch so a person could get inside.

Sorry but the possibilities of you saving your drum except with a lot of work are not good.

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