Corrosion resistance also depends on the density of concrete, which is provided by the exact amount of water used for its preparation, as well as the compaction. And to work with such concrete it was easier, plasticizers are added to it, which also have the properties of waterproofing. The stacked mixture of concrete is compacted with vibration and vacuuming, which allows you to remove all the shells (plots in the nodium of concrete filled with air), which reduce the service life of the pool.