wmacleod, on 03 January 2015 - 10:10 PM, said:
In light of http://www.ebuild.co...-object-lesson/
Ah well, never mind, I was only warning you because I know that horrible feeling when you get a bang followed by the sounds of a couple of tons of concrete raining down, I think most folk who have worked with concrete above 4ft have heard it at one time or another! It is very disheartening to lift it all into the mixer, place it, and then clear it out of the way again before it sets. Pokers are necessary to do the job right and get the concrete properly compacted around the rebar but they do have to be treated with respect. Makita do a 4ft battery operated one which is ideal if you can do lower lifts, just the right power and controllability. These things happen, don't let it get you down, a few days off does the world of good. Did you end up getting readymix in the end, surely you didn't manage to get it mixed and placed that quick?!
I aimed to fill up a 30 m retaining wall (225mm cavity) about 1.2 m up all in one go - That was going to take 8 m3... a full wagon load. Smart thinking... I'll get the 8 m3 as ready mix and save money on a full load.
Then after getting about 2 m3 in... POP - I did tell the wagon driver to slow down and move to a different shoot but my Dad said no we will get more in here and let it level its way out.
In reality, no matter how we filled it up on the day it would have popped open probably. Fortunately I managed to get another 2 m3 - 3 m3 in the rest of the wall and get it nicely evenly leveled out to just about level with the DPC skirt (DANGER POINT). This was partly due to the gutsy approach of the wagon driver and him aiming it from his wagon without a wooden shoot into some areas of the wall with military accuracy - WHAT A GUY!
Enough was enough and I lost my bottle and told the driver to dump the rest at the top of the site.
After firstly finishing what was in the wall and carefully compacting it with the poker to a good standard I turned to salvaging blocks from the slurry of concrete which laced the blow out area. I was really tired at this point it was about 7 PM and pitch black. I just threw them into a pile and focused on scooping away the concrete and dumping it a few feet away in a low spot that needed building up with hardcore anyway.
Now we got to about 8:30 PM, I'm tired, cold and dripping wet with sweat - It froze really hard that night and was getting very cold!
A quick drive to the local chippy and co-op and I get back with extra large chips, steak pie, sticky toffee pudding, and a bottle of wine which I stash in the microwave for later.
Back onto clearing up the blocks and cleaning them off.
As soon as that's done back to the top of the site... and the dumped concrete greats me - see the photo.
I raked this out to the best of my ability but now I'm really, really tired and it's time to call it a night before I injure myself!
Grab my food and hit the sheets... no logs in my log burner in the caravan tonight... our chainsaw had broken.
FORTUNATELY it froze very hard that night and when I tackled the 'not planned' hard standing at 6 AM it's still workable and I can level it out. I clean off the blocks more, stack them nice and tidy and travel back home for a week break...
Now we get to this stage and I post on here for advice - http://www.ebuild.co...632#entry103632
When I say "Annoyingly I need to mix about 4m3 of C35 grade concrete on site... Ready mix is not an option, trust me if I could do that I would!"
It's due to the previous events. I managed to rebuild the wall and get the 4 m3 shortfall placed by mixing it all in my 90ltr mixer. Mixing it all on my own and shooting it down the slope using a large un-perforated twin wall drain pipe - It worked very well and the concrete I mixed seems very, very strong and to a good standard. All solid as a rock now and I've enjoyed my Christmas break but eager to get back up there and carry on.
Edited by iSelfBuild, 03 January 2015 - 10:47 PM.