What is free water binder ratio in concrete technology?
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Free Water/Cement Ratio is defined as ratio of the mass of free water (that is, excluding the water absorbed by the aggregate to reach a saturated surface dry condition) to the mass of cement in a concrete mix.
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More water is therefore used than is technically necessary to react with cement. Water–cement ratios of 0.45 to 0.60 are more typically used. For higher-strength concrete,
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