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The most common measure is the water-cement ratio (w/c), calculated as:
Water-Cement Ratio = Total Water / Cement
For optimal workability and high compressive strength, the ideal w/c ratio typically falls between 0.35 – 0.40, with most concrete mixes ranging from 0.375 – 0.400.
Too little water makes the mix difficult to place and compact, while excess water can cause hydraulicity issues, even when using admixtures like superplasticisers or air-entraining agents. For highly waterproof mixes, too much water is undesirable as it can lead to placement problems, compaction issues, or segregation of aggregate particles.
At Concrete King, we ensure prompt delivery and professional service every time. With two-hour delivery windows, you get a reliable and precise service, saving you time and eliminating unnecessary delays.
Whether you're determining the amount of ready-mixed concrete for slabs or calculating the mix needed with coarse aggregate, we’ve got you covered.
To place an order or discuss your requirements, contact our friendly team today — we’re here to help you make the most of our concrete mix calculator.
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