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Posted: Sat Oct 04, 2014 10:34 pm
by Ouch
Back in months ago I asked about acquiring a cement mixer for a slow moving project. As a measure of how slow things are going, I've just bought one, second hand. It came with about 30kg concrete stuck to the inside of the drum as a freebie 
So, any thoughts on how I can get it out without massive personal effort and grief? It seems to be fairly evenly distributed around the larger circumference of the drum.
Cheers!
Posted: Sun Oct 05, 2014 6:21 am
by seanandruby
A small breaker and hard work. wear ear plugs and goggles.
Posted: Sun Oct 05, 2014 8:55 am
by dig dug dan
Smash as much out as you can , then get some brick acid and pour a load in, let the drum spin for a good 10 minutes. Rinse out and repeat a couple more times.
Posted: Sun Oct 05, 2014 3:34 pm
by GB_Groundworks
You can also get the worst out with breaker take the drum off and light a fire in it cracks the concrete off but you'll loose the paint of it, careful what you do with the wash out of the acid shouldn't be going down the drain.
Also heard of good angular grit and acid and few hours of spinning
I use a wrecking bar and a chipping hammer ball ache but gets it done
Posted: Sun Oct 05, 2014 3:40 pm
by lutonlagerlout
Posted: Tue Oct 14, 2014 10:56 pm
by Ouch
Spent a good few hours over the weekend chipping away at stratified cement with a claw hammer, pry bar and an old screwdriver. Managed to extract a full rubble sack worth. The headache is just starting to go.
Posted: Tue Dec 02, 2014 8:18 am
by henpecked
Just inherited a freebie with about 50kg nicely layered around the sides. Looked like it had never been washed as breaking it out ,looked like excavating a gobstopper. Its a big newish machine, so I thought it worth a go.
Spent two days with a peck and brick acid, then a hammer and bolster, no good. Used 5ltr of acid, it just seemed to melt off the exposed lime, then you just get a layer of exposed aggregate. Impervious to acid.
My breaker was on loan, so I got my heavy duty SDS drill with hammer function. Stuck an only 12mm bit on the end and got through more in 2 hours than I had in two days, and not so bad on the ears either.
Now have a nice empty drum. I though it was made of plastic once the concrete was out, I was throwing it around like a toy once it was 2/3rds lighter! 
Posted: Tue Dec 02, 2014 4:51 pm
by dig dug dan
what lll said!
Edited By dig dug dan on 1417539107
Posted: Tue Dec 02, 2014 6:15 pm
by Dave_L
Air chisel and a decent set of ear defenders, job done
Posted: Tue Dec 02, 2014 11:47 pm
by henpecked
dig dug dan wrote:what lll said!
Okay if you can get the right drum/volume/year......