Question 277620
"The main reason to add water to concrete — above and beyond what is needed for the proper hydration of the cement particles — is to improve workability, of course. “The rule of thumb is: 0.22 to 0.25 water-to-cement ratio is required for complete hydration,” says Schlagbaum. Most mixes have water-to-cement ratios of 0.40 to 0.60 primarily for workability purposes, he adds. But keeping the water-to-cement ratio down through the use of water reducers improves the concrete’s hardened properties."
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I found this statement using Google on the web.
As you see there is no agreement of the amount
of water to be used.
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Cheers,
Stan H.