It is currently 28 Mar 2024, 20:02
Mike wrote:Annoyingly, the brand new plastic seems to have a few manufacturing flaws like this:
The repair involves taping a large patch, about a foot square.
RogerS wrote:Mike, your nifty sand levelling jig. Is it a scraping motion or a tamping motion that you use? Presumably you need three people. One at each end and one person end on to watch the spirit level bubble? Those bubbles are very small...just wondered how easy it was ?
Mike G wrote:A patch on both sides is a great repair.
Mike G wrote:Don't worry. Nor worry about water in the "pond". The concrete will push the water out. The worst that can happen is a film of water on top of your finished concrete, and you can soon push that off with a broom before the concrete sets. The concrete is so much heavier than water that the water always floats to the surface, immediately, and will get pushed away as you tamp. It doesn't mix with your concrete, unless you allow it to stay on the surface after you finish tamping.
Mike G wrote:As for tamping with the DPM in place..........well, it's standard practise, and I have never heard of damage to the plastic. I shall be doing just that myself, although obviously you do take care. A bigger deal with this situation is that the folds in the plastic around corners become very hard and prominent when the concrete has pushed everything tightly to the formwork, and that can make finding the top of the formwork a bit awkward when you are tamping.
Talking of tamping: prepare your tamper beforehand, put some handles on it, and make sure you have another person there to help at the appropriate time.
Have fun with the pour! Do a last check on your formwork.....make sure it is strong enough to resist bowing under the pressure of many tons of liquid.
Mike G wrote:
I spent an hour or so bailing, and discovered a big problem.
Mike G wrote:It wasn't the water on top of the DPM which I bailed, particularly, it was the 9 inches of water in the trenches which was at the same level as the water under the DPM. In places the DPM was floating. Reducing the general level of water within the excavation was my aim, and, having had a look this morning, I am going to be OK for concrete in a couple of hours time.
Robert wrote:Just thinking... I don't think I've ever seen a brand new scaffold board before
RogerS wrote:Well done, Mike. You must be dead chuffed. Time for several beers, I think.
9fingers wrote:Less of this supping tea Mike! You have a couple of hours daylight left, time to knock up some muck and get some blocks laid!!
I always think this is the best bit of a building project as the new work rises out of the ground. Thanks for the dedication to posting in the topic.
Bob
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