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Cleaning the Inside of Concrete Mix Drum Truck

04/18/2012 5:37 PM

we are concrete ready mix company and i am looking for chemicals or tools to clean the inside of drum of concrete mix truck

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#1

Re: cleaning the inside of concrete mix drum truck

04/18/2012 6:08 PM

If the concrete has been allowed to harden then small quantities of explosives work well to breakup the concrete for removal (obviously this should only be done if you have people who know what they are doing and the proper safety procedures and permits, etc).

As for chemicals, I have had a lot of success cleaning (still) liquid concrete out of containers with just high pressure water. An industrial compressor and water blaster may be a viable (and chemical-free) alternative.

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#2

Re: cleaning the inside of concrete mix drum truck

04/18/2012 6:17 PM

How do you do it now?

How thick?

How old?

Are there paddles?

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#3
In reply to #2

Re: cleaning the inside of concrete mix drum truck

04/18/2012 6:26 PM

now we use jack hammer , but it is lots of hard work

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#4

Re: cleaning the inside of concrete mix drum truck

04/18/2012 6:59 PM
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#5
In reply to #4

Re: cleaning the inside of concrete mix drum truck

04/18/2012 7:06 PM

That will void the warranty every time.

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#6

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/18/2012 8:36 PM

This is a real common problem with cement trucks.

My best offer is to find someone recycling car batteries. Toss a dozen into the mixer and spin for an hour or so. The batteries will be broken up for recycling, the acid will have neutralized itself on the cement, and hopefully some cement has broken free and rattled around enough to help the acid get between the cement and the mixer wall.

Once the bond between the cement and the wall is broken, you're home free. A little more agitating with some nice softball sized stones should do the trick, but hopefully not knocked the mixing blades out of the mixer.

The fun part is getting the mixer to spit out all this mess.

The green part of this is the disposal of the acid. I don't know what recyclers do with the acid, but I'll betcha it's not easy.

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#7

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/18/2012 8:36 PM

Jackhammers and/or dynamite is the traditional method....but it would seem high frequency vibration with a sledgehammer should work...I mean how well can concrete adhere to a smooth steel surface...? Possibly super high pressure water jet should work, the question is, how high can you go with the pressure without damaging the steel drum....

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#8
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Re: Cleaning the Inside of Concrete Mix Drum Truck

04/18/2012 9:02 PM

How well can concrete adhere to smooth steel surface.

I've got this small shovel that I've had since the 80's. That's 1980's.

I used it to move some concrete back then. The cement dried on the shovel. It's still there today, though I've tried many times to remove it. Enough has come off so that I can use it, but its still there.

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#9
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Re: Cleaning the Inside of Concrete Mix Drum Truck

04/18/2012 10:51 PM

I've had that happen, but got it off by whacking the shovel on the ground...

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#10
In reply to #9

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/18/2012 10:58 PM

I've hit it, whacked it, pounded it with everything I have. I could grind it off, but, I've learned to live with it.

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#11
In reply to #10

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/19/2012 1:14 AM

Sounds like your shovel was severely pitted for the concrete to get that kind of grip...In my experience concrete will not adhere with that kind of bond on a smooth metal surface...If the interior of the tank has a rough surface, all bets are off....

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#12
In reply to #11

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/19/2012 8:36 AM

I'd think that after the drum has processed its first batch of concrete that it would be perfectly etched and ready to bond.

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#14
In reply to #7

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/19/2012 11:21 AM

Yes here is a cleaning service that uses high pressure water jet....video...

http://www.ready-jet.com/

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#15
In reply to #14

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/19/2012 4:23 PM

That was impressive. I wonder how the jet gets the drum so clean, I'd like to see one in action.

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#16
In reply to #14

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/19/2012 11:21 PM

this Robotic tool loos costly

maybe using water jetting with hand jetting gun will be more cost effective

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#17
In reply to #16

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/20/2012 9:11 AM

Very impressive!

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#13

Re: Cleaning the Inside of Concrete Mix Drum Truck

04/19/2012 9:57 AM

Short of using chipping hammers, etc. you can always use a mild acid to remove the bonded concrete when rotating the drum. It may have to be done several times.

Sorry, I don't know the type of acid used nor it's molarity. Since concrete is alkaline the acid is used to neutralize it.

I've head this from ready-mix concrete drivers many times while on a site visit during concreting ops.

Yes, concrete bonds very well to steel whether it's pitted or not. The key to keep the concrete bonding to the inside of the drum is a thorough wash down of it's interior immediately after discharging the concrete mix load before it flashes.....

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