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Join Date: Oct 2003
Location: Roseville, CA
Posts: 3,066
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Ok to submerge cured concrete?
A couple weeks ago I made some umbrella holders just using a couple plastic planter pots and PVC pipe sticking out, then poured concrete around for weight. It dawned on me today that I dont think there is any reason I can put it on the steps for some in pool shade, but I thought I should check and see.
Everything I google keeps coming up with ways to pour concrete in water or how to set in wet environment, I'm talking about fully cured concrete. Any issues? 
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1992 968 Polar Silver 2010 Toyota Highlander SE 2006 Lexus LS430 ML |
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06-18-2017, 12:13 PM
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Cogito Ergo Sum
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Shouldn't be any issue.
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06-18-2017, 12:17 PM
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Don't do it. It will suck up water like a sponge and start to float.
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--------------------------------------------------------------------------- "There is nothing to be learned from the second kick of a mule" - Mark Twain |
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06-18-2017, 12:49 PM
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Banned
Join Date: May 2006
Location: Dana Point, Ca
Posts: 55,591
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piers, docks and bridges seem to work ok
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06-18-2017, 01:02 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,842
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If you can put wet concrete in water and it will cure (Roman's discovered/invented this, right?), then you can certainly use already cured concrete in water. I guess the only downside might be if the water had a pH of 2...
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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06-18-2017, 01:05 PM
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Depending on what/how you treat your pool water it will either be just fine or it will cause a nuclear zombie spoclypse.
Go for it. |
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06-18-2017, 01:09 PM
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Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,506
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The guys setting my hurricane metal fence posts in concrete told me that concrete will set under water. I see no problem.
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"Now, to put a water-cooled engine in the rear and to have a radiator in the front, that's not very intelligent." -Ferry Porsche (PANO, Oct. '73) (I, Paul D. have loved this quote since 1973. It will remain as long as I post here.) |
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06-18-2017, 02:32 PM
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Join Date: Jan 2012
Location: NW Ohio
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My neigbors new house had the basement poured on Tuesday morning as I was leaving for work (6:00 A.M.) it was a truly hot/humid day (95 degree, 90% humidity) that boiled up some storms in the afternoon. We ended up getting 5.5" of rain in a 3 hour period, which overflowed our creek, and the ditches, so we had water flowing 6" deep across the road in front of our house. I wasn't able to stop and look, but I wonder what happened to his newly poured basement.
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06-18-2017, 02:51 PM
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Platinum Member
Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
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If there is rebar or other untreated metal in it, the chlorine will cause it to rust. Eventually it will expand and pop the concrete. Look up spalling.
If you want it to last, get a bag of pool plaster and coat it. Otherwise go for it.
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The truth is that while those on the left - particularly the far left - claim to be tolerant and welcoming of diversity, in reality many are quite intolerant of anyone not embracing their radical views. - Charlie Kirk |
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06-18-2017, 03:07 PM
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Whoopsies I was banned!!!
Join Date: Sep 2005
Location: Trying to Escape from FLA
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The mob uses it to hide evidence and it seems to work well for them. It should work well for your application.
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06-19-2017, 05:10 AM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
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The only concern I would have is the possibility of damaging the surface of the pool.
If the wind picks up a bit and starts to move and rock the weights it could get expensive fast. If it was up to me I'd find a way to anchor the umbrellas outside of the pool. You could get one with an articulated arm that swings over the pool. 
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06-19-2017, 05:47 AM
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You're over thinking it. If it degrades after a couple summers make another one. Your into it for less than $10.00
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Derrick |
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06-19-2017, 06:38 AM
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Location: Dana Point, Ca
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yeah, a bag of Ready Mix is three dollars and weighs 70 lbs, you can make a lot of weights with that. swimming pools are made of concrete and they have steel in them. it seems to work
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06-19-2017, 06:50 AM
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Registered
Join Date: Sep 2001
Location: Dismal Nitch, AZ
Posts: 9,042
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Costco:
Articulated, adjustable, big. Close it prior to heavy winds or it may end up in your pool.  . .  .  .
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Don . "Fully integrated people, in their transparency, tend to not be subject to mechanisms of defense, disguise, deceit, and fraudulence." - - Don R. 1994, an excerpt from My Ass From a Hole in the Ground - A Comparative View Last edited by Don Ro; 06-19-2017 at 07:12 AM.. |
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06-19-2017, 07:08 AM
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Join Date: Sep 2001
Location: Dismal Nitch, AZ
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Costco umbrella base resting sweetly in 8 ft. of water.
. 
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Don . "Fully integrated people, in their transparency, tend to not be subject to mechanisms of defense, disguise, deceit, and fraudulence." - - Don R. 1994, an excerpt from My Ass From a Hole in the Ground - A Comparative View |
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06-19-2017, 07:13 AM
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Platinum Member
Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
Posts: 20,935
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I remember that thread Don.
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The truth is that while those on the left - particularly the far left - claim to be tolerant and welcoming of diversity, in reality many are quite intolerant of anyone not embracing their radical views. - Charlie Kirk |
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06-19-2017, 07:16 AM
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Join Date: Sep 2001
Location: Dismal Nitch, AZ
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That was something. The entire rig in the pool.
With goggles, I went down, unscrewed that center piece, removed the lid to expose the sand tub, extended the hose on my shop vac, sucked the sand up (took an hour or so), and eventually was able to lighten it to the point of going back down an lifting it to the shallow end. Never again !!! (I hope) 
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Don . "Fully integrated people, in their transparency, tend to not be subject to mechanisms of defense, disguise, deceit, and fraudulence." - - Don R. 1994, an excerpt from My Ass From a Hole in the Ground - A Comparative View |
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06-19-2017, 08:54 AM
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1986 Porsche 944 2.5l
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