My concrete dock has been undermined by wave action and there's a huge area underneath with no rocks there. It's the front side, facing the water that needs repair. Apparently, the bottom part was filled with rocks, then the conrete was poured in. The top foot or so is solid concrete. The water level is quite low right now, so only about 8" would be under water. I'm planning to put more rocks in there to help fill the space. Is this going to work, or would I be wasting my time and money?
2007-09-07 14:00:48 · 13 answers · asked by Mr. Kitty 1 in Home & Garden ➔ Maintenance & Repairs
Yes. All concrete will set up (cure) under water. It actually cures better under water than it does above water. You can ask any State Inspector on the highway that is on a construction job pouring concrete. When they take test cylinders they let them harden enough so they can remove the cylinder casing, then they put them in water to cure for a period of time before they break them. You do not want your concrete to soupy, it should be on the dry side. Because as you put it into the water it will thin out some. Have your rocks already put down when you do so that you can use them as forms kinda like. Plus some for extra, if you know what I mean.
Ex-Concrete Truck Driver
2007-09-07 14:52:14 · answer #1 · answered by SLoWpoke 2 · 2⤊ 0⤋
1
2017-01-22 12:20:10 · answer #2 · answered by ? 2 · 0⤊ 0⤋
Concrete cured in water will be stronger in the end; however there should not be any strong current which might erode it, or agitation, as it needs time to set initially . By adding a certain calcium additive however to the wet concrete you can cause it to set off slightly faster; or moderately faster; or ALMOST INSTANTANEOUSLY. Be careful if you are going to mix it yourself, as it can happen in a flash; do a test mix.
If you're going to order the concrete, then the company will add whatever you want; they are fully familiar with the process.
Are you talking about SALT water? This I must say would be different, as salt is not a friend of concrete. If you are----well....I might do this either way-----i'd order the concrete with the calcium additive so that it cures quicker (but again.... be careful, as the cement will then stiffen up VERY QUICKLY, and if you're only halfway through the mix, you're screwed.... I wouldn't do such a thing as this without the help of an experienced concrete man.
2007-09-07 20:48:20 · answer #3 · answered by Charles S 2 · 0⤊ 0⤋
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Can concrete set up under water?
My concrete dock has been undermined by wave action and there's a huge area underneath with no rocks there. It's the front side, facing the water that needs repair. Apparently, the bottom part was filled with rocks, then the conrete was poured in. The top foot or so is solid concrete. ...
2015-08-19 04:43:47 · answer #4 · answered by Clement 1 · 0⤊ 0⤋
Underwater Concrete
2016-12-12 22:26:53 · answer #5 · answered by ? 4 · 0⤊ 0⤋
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I just did concrete under water last week.(New basement sump pit) I poured the dry concrete through the water and it set soft after 24 hours. after 48 hours it was very solid. I wouldn't expect the volume to have a great impact on the timing except maybe setting a little faster because higher volume would cure hotter
2016-04-03 12:18:05 · answer #6 · answered by ? 4 · 1⤊ 0⤋
concrete will set under water but if i was you i would try and consolidate the whole area with mass concrete ..if you could put a shutter in front to stop wave action while the concrete sets it will help ..either speak to your local ready mixed plant about the types of concrete available ..or try adding rapid set to mix
2007-09-07 20:06:36 · answer #7 · answered by boy boy 7 · 0⤊ 0⤋
portland cement cures chemicaly so yes it will harden under water just make a form to help hold it in place while it sets.
2007-09-07 14:11:28 · answer #8 · answered by Tio 6 · 0⤊ 0⤋
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2015-01-26 00:15:47 · answer #9 · answered by Anonymous · 0⤊ 0⤋
Hydraulic cement will cure underwater. Sometimes it is called wet plug. You can get it at home improvement stores/
2007-09-07 14:31:18 · answer #10 · answered by candyman 4 · 2⤊ 0⤋