WHAT YOU SHOULD KNOW
Did you ever consider what extra water does to concrete? Concrete
should contain enough water to produce a mix that has a relativity stiff consistency, which works readily and does not segregate. Normally concrete delivered to projects has a slump of between three and four inches.
If drivers add an excessive amount of water, it will affect the durability and reduce the strength of the concrete.
If you add only one gallon of water to a yard of properly designed 3000 psi concrete mix: