BRYAN3 Posted January 10, 2016 Report Share Posted January 10, 2016 Hello Guys. I have laid concrete befor but this is slightly different in that I am intending to add some of that there "new fangled fibre stuff". This is for a greenouse base 7ft x 17ft 3 1/2ins thick. The shuttering is in place and I just need to get the dust and whichever fibre is required,there appear to be different kinds in differing lengths etc. And I have no idea how much to add to the mix. Any advise please. Regards Bryan. Quote Link to comment Share on other sites More sharing options...
Enzo Posted January 10, 2016 Report Share Posted January 10, 2016 Fibre strand reinforcement is usually gauged to the amount of cement to be used. Wickes sell bags of it! Quote Link to comment Share on other sites More sharing options...
bullet1747 Posted January 10, 2016 Report Share Posted January 10, 2016 Why don't you just use norm concrete Quote Link to comment Share on other sites More sharing options...
unico1 Posted January 10, 2016 Report Share Posted January 10, 2016 Given that area I would recommend you having it mixed on site approximately 1 cubic metre. We've got wagons our way will do as little as .5 up to 6 cube, as for fibres they add them as it is mixed nothing gauged just couple of handfuls or so. Cost wise £100_150 per cube. Hope this helps. Quote Link to comment Share on other sites More sharing options...
Enzo Posted January 10, 2016 Report Share Posted January 10, 2016 Or, get some wire mesh in there. Looking at the size of the slab, have you split it into sections to help reduce the chances of cracking? Its very long for a single strip at only 3 1/2" thick! Quote Link to comment Share on other sites More sharing options...
robbiep Posted January 10, 2016 Report Share Posted January 10, 2016 Why don't you just use norm concrete Yup. Nothing more needed. Stop overthinking, and start tamping ! Quote Link to comment Share on other sites More sharing options...
bullet1747 Posted January 10, 2016 Report Share Posted January 10, 2016 Yup. Nothing more needed. Stop overthinking, and start tamping ! Exactly my thoughts , don't fix whats not broke Quote Link to comment Share on other sites More sharing options...
BRYAN3 Posted January 10, 2016 Author Report Share Posted January 10, 2016 Thanks Guys. I was thinking perhaps just slap it in. It is on hoggin laid 30 years ago,the digger driver struggled to grade it for me. Mind you,he was using a ditching bucket as we had been ditching all day. It's also only for two 8x6 greenhouses on three courses of bricks. They will be back to back so a door each end. I was looking at the site this afternoon,half full of water and leaves. I only need the dust and a straight stick for tamping and ready to go. ATB Bryan. Quote Link to comment Share on other sites More sharing options...
Essex Keeper Posted January 10, 2016 Report Share Posted January 10, 2016 Right mix great dunmow ! Quote Link to comment Share on other sites More sharing options...
TaxiDriver Posted January 10, 2016 Report Share Posted January 10, 2016 BRYAN3 whereabouts are you ? Quote Link to comment Share on other sites More sharing options...
BRYAN3 Posted January 10, 2016 Author Report Share Posted January 10, 2016 BRYAN3 whereabouts are you ? TaxiDriver Halfway to Colchester. Quote Link to comment Share on other sites More sharing options...
chady Posted January 10, 2016 Report Share Posted January 10, 2016 And don't mix it like **** it makes it week! The idea (in basic) is to slow the drying time down so it doesn't go of to quick. So spay it every so often start in the morning lay it and keep it wet for as long as possible Quote Link to comment Share on other sites More sharing options...
chady Posted January 10, 2016 Report Share Posted January 10, 2016 (edited) 7 ft wide is ok. put one expansion down the centre. Of the long section if you want to be safe. You can just cast one side then get some expansion foam up against that slab and pour the second. Or you can go to town and dowle and cleave the joint And get some spacers known as mars bars and some mesh Edited January 10, 2016 by chady Quote Link to comment Share on other sites More sharing options...
TaxiDriver Posted January 10, 2016 Report Share Posted January 10, 2016 BRYAN3 whereabouts are you ? BRYAN3 whereabouts are you ? TaxiDriver Halfway to Colchester. Let me know if you want a hand ? Quote Link to comment Share on other sites More sharing options...
BRYAN3 Posted January 11, 2016 Author Report Share Posted January 11, 2016 TaxiDriver. That's very kind of you . My younger brother has said he will help me with it but he has kids and comitments. What clubs are you in,we may know each other in passing. What kind of shooting do you do? I had a squint at some of your posts and noticed you were after a bike. Are you getting on all right with the one you got. Just realised this aint a gay dating site is it. Kindest regards Bryan. Quote Link to comment Share on other sites More sharing options...
bobt Posted January 11, 2016 Report Share Posted January 11, 2016 now he is worried Quote Link to comment Share on other sites More sharing options...
djrwood Posted January 11, 2016 Report Share Posted January 11, 2016 7 ft wide is ok. put one expansion down the centre. Of the long section if you want to be safe. You can just cast one side then get some expansion foam up against that slab and pour the second. Or you can go to town and dowle and cleave the joint And get some spacers known as mars bars and some mesh Doing this would be an A star job. If it was me I would just mark where the two greenhouses are going to meet back to back and create a crack induced joint: Either run a saw down it when the concrete is green (evening/morning after pouring) Or if you want to get fancy buy some of the plastic inserts, than you then pull out in morning. They are called crack inducers. I wouldn't worry about the fibre. People think it adds structural properties to the concrete but I believe it is more used for a better finish as it reduces surface voids and cracking. A sheet of mesh would be best to limit any cracking and promote longevity of the slab. Just make sure you leave it 50mm short of the crack induced joint to stop water getting to it and it rusting up. Again, I would definitely run a joint through it and not pour all 17foot in one strip as it will definitely crack up in the future. From memory I think the British Standard requires joints installed at max 4.8m centres and that's with all the requirements for formation checks, reinforcement and cover etc. Have fun mate and get it covered. The weather is cold for the next few days Quote Link to comment Share on other sites More sharing options...
bobt Posted January 11, 2016 Report Share Posted January 11, 2016 you could put a fillet in below the surface to form a crack inducer, and still pour it all in one go. Quote Link to comment Share on other sites More sharing options...
BRYAN3 Posted January 11, 2016 Author Report Share Posted January 11, 2016 now he is worried He's a bit young, I must be careful not to get had up for grooming. Quote Link to comment Share on other sites More sharing options...
TaxiDriver Posted January 11, 2016 Report Share Posted January 11, 2016 now he is worried Ha, he's playing hard to get lol he's not answering PM's Quote Link to comment Share on other sites More sharing options...
BRYAN3 Posted January 11, 2016 Author Report Share Posted January 11, 2016 Ha, he's playing hard to get lol he's not answering PM's Hello Mate. I just answered. I was busy typing-you kno,with one finger. Quote Link to comment Share on other sites More sharing options...
bobt Posted January 12, 2016 Report Share Posted January 12, 2016 better than with one hand? Quote Link to comment Share on other sites More sharing options...
cuffy Posted January 13, 2016 Report Share Posted January 13, 2016 (edited) Not when you've got six fingers to choose from . Edited January 13, 2016 by cuffy Quote Link to comment Share on other sites More sharing options...
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