Triassic Posted March 9, 2018 Share Posted March 9, 2018 (edited) iI’ve found that there’s only one local supplier of waterproof concrete. I’ve got a quote, but be honest im unsure if their quote is competitive or not. £145 per m3 ex VAT for a C28/35 (350 0.45) w/r sika w/t CEM 1 S3 Pump 10mm. What do you think? How much are you paying for concrete locally? Edited March 9, 2018 by Triassic Link to comment Share on other sites More sharing options...
Simplysimon Posted March 9, 2018 Share Posted March 9, 2018 is that pumped? £87+ vat out of the jigger but not waterproof. Link to comment Share on other sites More sharing options...
Alexphd1 Posted March 9, 2018 Share Posted March 9, 2018 Although no help we where approx £90m2 for normal. Link to comment Share on other sites More sharing options...
Triassic Posted March 11, 2018 Author Share Posted March 11, 2018 (edited) It’s good to know the price of ordinary concrete. It’s been suggested that the waterproof admix is £24 per sachet and a sachet will do a m3. Edited March 11, 2018 by Triassic Link to comment Share on other sites More sharing options...
Onoff Posted March 11, 2018 Share Posted March 11, 2018 (edited) 1 hour ago, Triassic said: It’s good to know the price of ordinary concrete. It’s been suggested that the waterproof admix is £24 per sachet and a sachet will do a m3. How does that stuff vary from this: https://www.toolstation.com/shop/p80460?table=no I've used it in every mix I've done for the last few years. Intend building a car pit and shuttering and casting the walls using this stuff in the mix. Different stuff? Edited March 11, 2018 by Onoff Link to comment Share on other sites More sharing options...
Triassic Posted March 11, 2018 Author Share Posted March 11, 2018 (edited) I’ve talked to a number of admix suppliers and they do make this waterproofing chemicals stuff sound like a black art. Taking the cost of the admix into consideration, it sounds like my only local batch plant has a £35m3 mark up on waterproof concrete. Edited March 11, 2018 by Triassic Link to comment Share on other sites More sharing options...
Luckylad Posted March 11, 2018 Share Posted March 11, 2018 1 hour ago, Onoff said: How does that stuff vary from this: https://www.toolstation.com/shop/p80460?table=no I've used it in every mix I've done for the last few years. Intend building a car pit and shuttering and casting the walls using this stuff in the mix. Different stuff? Hi be careful of using that to tank underground. It says plasticiser on the tub which means ,amongst other thing it adds air bubbles to the mix. Link to comment Share on other sites More sharing options...
Onoff Posted March 11, 2018 Share Posted March 11, 2018 (edited) 8 minutes ago, Luckylad said: Hi be careful of using that to tank underground. It says plasticiser on the tub which means ,amongst other thing it adds air bubbles to the mix. Label on the back says it includes a deaerator in it. Tamping stuff down and hardly any bubbles come up. Have a look at the data sheet: https://www.everbuild.co.uk/product/202-integral-liquid-waterproofer/ Confusing tbh. Says not for use in structural concrete...guessing different stuff to what you guys are looking at. Edited March 11, 2018 by Onoff Link to comment Share on other sites More sharing options...
Luckylad Posted March 11, 2018 Share Posted March 11, 2018 (edited) Yes you’re correct it’s data sheet says it’s suitable for tanking underground Edited March 11, 2018 by Luckylad Spelling Mistake Link to comment Share on other sites More sharing options...
PeterW Posted March 11, 2018 Share Posted March 11, 2018 7 minutes ago, Onoff said: Label on the back says it includes a deaerator in it. Tamping stuff down and hardly any bubbles come up. Have a look at the data sheet: https://www.everbuild.co.uk/product/202-integral-liquid-waterproofer/ Confusing tbh. Says not for use in structural concrete...guessing different stuff to what you guys are looking at. The structural concrete comment is because to meet a strength requirement (ie RC35) the mix has to use gauged additives that are certified for use in that area and have the appropriate certification. Mixing your own will never meet that criteria hence the warning. 1 Link to comment Share on other sites More sharing options...
Onoff Posted March 11, 2018 Share Posted March 11, 2018 2 minutes ago, PeterW said: The structural concrete comment is because to meet a strength requirement (ie RC35) the mix has to use gauged additives that are certified for use in that area and have the appropriate certification. Mixing your own will never meet that criteria hence the warning. So no good for car pit walls? There won't be an SE in sight. Link to comment Share on other sites More sharing options...
PeterW Posted March 11, 2018 Share Posted March 11, 2018 58 minutes ago, Onoff said: So no good for car pit walls? There won't be an SE in sight. Would be fine assuming the car pit wall wasn’t supporting a small bridge or providing structural support for a building .... The trick is to cast wet on wet and and keep going so you’ve no dry bridges in the concrete - poker helps as does a retarder but not sure they are compatible with each other. 1 Link to comment Share on other sites More sharing options...
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