JonD Posted September 11, 2011 Report Share Posted September 11, 2011 Hi All, I have mixed and poured the remaining half ton of concrete for my garden wall footing today after getting rained off yesterday. It's about 9M x 9" x 6" deep, about an hour after the final pour we had a heavy shower then dried again, then rain again. Is there any issue with leaving it uncovered as i don't have anything to cover it? The mix is a 4:1 and not wet, just enough water as I didn't want to weaken the mix. Cheers, Jon. Quote Link to comment Share on other sites More sharing options...
terry b Posted September 11, 2011 Report Share Posted September 11, 2011 Hi All, I have mixed and poured the remaining half ton of concrete for my garden wall footing today after getting rained off yesterday. It's about 9M x 9" x 6" deep, about an hour after the final pour we had a heavy shower then dried again, then rain again. Is there any issue with leaving it uncovered as i don't have anything to cover it? The mix is a 4:1 and not wet, just enough water as I didn't want to weaken the mix. Cheers, Jon. hi there ,shoudnt be a problem at 4to 1even if it pours down Quote Link to comment Share on other sites More sharing options...
magman Posted September 11, 2011 Report Share Posted September 11, 2011 It will stop it cracking Quote Link to comment Share on other sites More sharing options...
JonD Posted September 11, 2011 Author Report Share Posted September 11, 2011 Cheers guys I can stop worrying Jon. Quote Link to comment Share on other sites More sharing options...
gonk69 Posted September 11, 2011 Report Share Posted September 11, 2011 fella its a footing only thing to worry bout is deep frost . happy days Quote Link to comment Share on other sites More sharing options...
JonD Posted September 11, 2011 Author Report Share Posted September 11, 2011 fella its a footing only thing to worry bout is deep frost . happy days Cheers, this is my first building project, have recieved lots of help and advice from guys on here and lot's of reading but didn't know if the rain could be a problem. Thanks for the reassurance Jon. Quote Link to comment Share on other sites More sharing options...
utectok Posted September 11, 2011 Report Share Posted September 11, 2011 Concrete sets under water! Quote Link to comment Share on other sites More sharing options...
magman Posted September 11, 2011 Report Share Posted September 11, 2011 Cheers, this is my first building project, have recieved lots of help and advice from guys on here and lot's of reading but didn't know if the rain could be a problem. Thanks for the reassurance Jon. You did go 8ft down didn't you ? Quote Link to comment Share on other sites More sharing options...
JonD Posted September 11, 2011 Author Report Share Posted September 11, 2011 You did go 8ft down didn't you ? Only for the section that was designated for cats **** I'm a bit concerned about the structural properties of cats but the 7' 9" of concrete should be good enough for the wall as the rest is 6" Jon. Quote Link to comment Share on other sites More sharing options...
mickwal Posted September 11, 2011 Report Share Posted September 11, 2011 Hi All, I have mixed and poured the remaining half ton of concrete for my garden wall footing today after getting rained off yesterday. It's about 9M x 9" x 6" deep, about an hour after the final pour we had a heavy shower then dried again, then rain again. Is there any issue with leaving it uncovered as i don't have anything to cover it? The mix is a 4:1 and not wet, just enough water as I didn't want to weaken the mix. Cheers, Jon. dont worry about it it will set before you no it and it takes a lot of rain the damage it... Quote Link to comment Share on other sites More sharing options...
four-wheel-drive Posted September 12, 2011 Report Share Posted September 12, 2011 We had our drive concreted some years ago a short time after it was completed there was a heavy shower of rain it was ok except the top surface was a bit flaky it did not affect the strength of the concrete it lasted for years it just did not look as good as we had hopped that it would. Quote Link to comment Share on other sites More sharing options...
timps Posted September 12, 2011 Report Share Posted September 12, 2011 It will help with curing the concrete, to adversely affect the water cement ratio you would have to use some mechanical force such as troweling the surface whilst the surface water was still present and the concrete less than a few hours old. You might get a bit of cement washed away at the surface making it a bit friable but this will not be a problem for a garden wall footing and only affect the very top surface. You should always cover your concrete to cure it properly, if it’s not covered and dries out too quickly it will suffer a significant loss in strength as well as cracking or curling, curing also helps with resistance to freeze and thaw damage. So you should cure your concrete for several days, but as a garden wall footing the ground will keep it damp (no DPM) and the evaporating surface is small compared to the large evaporating surface of a concrete driveway or floor so you should be ok. Quote Link to comment Share on other sites More sharing options...
JonD Posted September 12, 2011 Author Report Share Posted September 12, 2011 It will help with curing the concrete, to adversely affect the water cement ratio you would have to use some mechanical force such as troweling the surface whilst the surface water was still present and the concrete less than a few hours old. You might get a bit of cement washed away at the surface making it a bit friable but this will not be a problem for a garden wall footing and only affect the very top surface. You should always cover your concrete to cure it properly, if it’s not covered and dries out too quickly it will suffer a significant loss in strength as well as cracking or curling, curing also helps with resistance to freeze and thaw damage. So you should cure your concrete for several days, but as a garden wall footing the ground will keep it damp (no DPM) and the evaporating surface is small compared to the large evaporating surface of a concrete driveway or floor so you should be ok. Fortunately we didn't have as much rain as expected and it looks fine, I have now picked up a tarp and covered it, won't be doing any more on the project until the weekend Jon. Quote Link to comment Share on other sites More sharing options...
vampire Posted September 12, 2011 Report Share Posted September 12, 2011 Concrete sets under water! Jon,as above it will cure under water and may even be stronger if you mixed it to dry the water will help,dont worry about it mate,its only a footing and not a finished driveway,i have worked in plenty of footings that had to be pumped out first Adding to much water to the mix when pouring is what makes it weak. Quote Link to comment Share on other sites More sharing options...
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