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A lot of the water is lost through evaporation.
chemical earthig is that type of earthing where low water level mostly used in hilly areas
Excess water (over hydration) causes weak concrete. The water in concrete is there to start a chemical process which results in the hardening process. The excess water is not used in the chemical process and results in a weakened concrete.
Water is forced up through a pipe or pipes.
Yes, concrete is porous and water will move through it over time.