the concrete should be 6" according to this site
http://www.de-fontenay.com/poolcon4.htm
The best concrete for making a concrete bench is Bench concrete.
The pH of water for making concrete is 6 to 8.The water should be free from organic matters.Sea water should not be used for making concrete.Potable water is used for making concrete.
I had an inground pool installed. We just turned on the lights at night and noticed footprints on the bottom. Can this be fixed? Call the pool company back. The bottom is normally sand mixed with cement. The liner will probably have to be removed and bottom smoothed. They should have checked that before installing the liner. Those printswi catch sediment and debris for the life of the liner.
Any cracks that are in the pool, and if it leaks. See if you can get anyone to come out and inspect the pool.
due to carbondioxide
Steel re-inforcing in concrete should always be placed 1/3 of the depth from the bottom. A 6" thick slab would have the steel placed 2" off the bottom.
thats a bad idea to have an inground salt water pool in concrete. the salt water it self may eat away some parts of the concrete, plus the fact that its underground and contains salt it attracts worms. maybe you should pour alot of clorine in the pool to kill them, then empty out the water and start fresh.
NO however you should keep in mind that the ground water outside of the pool is not going to put pressure on it as this is capable of even lifting a concrete pool out of the ground.
is it a liner or concrete?...if it's a liners DON'T drain it any more then about 6 in. in the shallow end the liner will shrink...if concrete.....it should be fine as long as you don't have a high water table close to the pool.good luck
a concrete mix of suitable slump as per mix design should be selected
For Aboveground pools, typically you would use clean sand (no stones) or you can buy some pool specific ground covers, some are foam, some more like a foil. For Ingorund applications you could do any of the above, sand used to be used a fair bit but I wouldn't recommend it. In our opinion inground pools should have a proper concrete/grout bottom. It protects the line from things in the ground and will not shift causing the bottom to move and possible the liner to fail.
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