Making Concrete Blocks.

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goodwinm		Making Concrete Blocks.	04-10-2010 @ 07:29
a PB is a PB ! Member 539, 1086 posts	Post Edited: 04.10.2010 @ 07:30 AM by goodwinm Ok so i've made my first concrete block. I used a 39 Litre Contico TuffTub. It's plastic. Filled and mixed the concrete in their and then let it set. Mixed by hand -with a thin metal bar) so it didnt all mix but I had a pretty much bucket shaped solid ass concrete block. The tub was this: http://www.toolbank.com/p/CTO1120BK (I assumed it would have just slid out once overturned since the tub itself is pretty straight) So I had to try and get the solid concrete block out of the bucket. Easier said then done. I rolled it over so the bottom was facing up, Stuck. bo***cks. It really wasnt budging and it is quite a hefty weight too. So In the end I had to crack the bucket and snap it off halfway round so that it would come out. Waste of a bucket. Good job it didnt cost a bomb. I want to make a few of these and don't want to be wasting a 3 quid bucket everytime. Question is (Could have just asked it rather than giving you a story).... Is there anything I could do to stop it from getting stuck in the bucket? an another question... Would filling a cardboard box with concrete and letting it set work? or would it just destroy the box and get the mixture everywhere? That is all.

jamiea		...	04-10-2010 @ 07:44
has perfected the anvil roll Member 353, 3292 posts SQ 230, BP 160, DL 275 665.0 kgs @ 100kgs UnEq	Perhaps you could part bury the box to support the sides and line it with a big bin bag

smuk		...	04-10-2010 @ 07:52
Member 1705, 104 posts	grease it?

Doc_D		...	04-10-2010 @ 08:31
please use accurate taxonomy in our communication Member 871, 469 posts SQ 240, BP 137.5, DL 262.5 640.0 kgs @ 89kgs Eq	Make a form out of plywood and screw it together. Fill and let mix set. Unscrew.

goodwinm		...	04-10-2010 @ 08:43
a PB is a PB ! Member 539, 1086 posts	Thanks for the reply guys. Was thinking of wedging it with something so plywood sounds like a very good idea. FYI - Mixing 85kg of concrete by hand with a hollow metal bar is a son of a b**ch!


Thing		...	04-10-2010 @ 08:47
a large fingered spastic that demolishes plant Member 89, 31706 posts SQ 260, BP 220, DL 290 770.0 kgs @ 142kgs UnEq	the Doc speak sense. make a frame to the size you want make sure its square and put a smooth sheet on the bottom and then pore and leave to set.

Martin_Jones		...	04-10-2010 @ 09:30
Member 566, 813 posts SQ 280, BP 175, DL 340 795.0 kgs @ 125kgs UnEq	What you using the block for? Reason I ask is that concrete is not strong enough to drop from height. You might want to considered steel reinforcing bars in the centre and/or using fibrous cement. Speak to JT about what compounds he uses.

PeteHodgson		...	04-10-2010 @ 09:38
Has little understanding of the sugden Member 677, 11338 posts SQ 165, BP 125, DL 220 510.0 kgs @ 80kgs UnEq	if you use the plastic tub method again you should probably coat it with oil/grease first. That's waht they do with the inside of stone moulds. Don't know of it's a special grease, maybe a silicone grease spray?

Thing		...	04-10-2010 @ 09:50
a large fingered spastic that demolishes plant Member 89, 31706 posts SQ 260, BP 220, DL 290 770.0 kgs @ 142kgs UnEq	you could use fibers in the concrete mix as these act like steer rebar.

goodwinm		...	04-10-2010 @ 09:58
a PB is a PB ! Member 539, 1086 posts	Post Edited: 04.10.2010 @ 10:07 AM by goodwinm Martin_Jones said:What you using the block for? Reason I ask is that concrete is not strong enough to drop from height. You might want to considered steel reinforcing bars in the centre and/or using fibrous cement. Speak to JT about what compounds he uses. For training purposes. I've dropped it quite a few times now and it is really solid. I know it might not last long though. I only wanted to make some cheap concrete blocks for carrying and pressing etc. If I start putting Epoxy and Hardner etc in the mix it will cost a fortune. For my next block, I might put some scrap metal in it. Corregated iron etc. And yeah might have to send JT a PM too. See if he has any cheap suggestions. I will use grease for my next concrete block in a tub. Sell plenty of that on the cheap at work. Edit: Imagine this spray should do the job... http://www.toolbank.com/p/C3320/EVBSILSPRAY

Rico		...	04-10-2010 @ 11:20
Sugdens very own David Dimbleby Member 1403, 3716 posts SQ 220, BP 115, DL 260 595.0 kgs @ 97kgs UnEq	You could try lining the bucket with some damp proof membrane, but i would imagine you'd need heavy duty stuff.

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