Concrete Mixes

Concrete mix ratios are a proportion of Portland cement, sand, aggregates and water. The mix ratios determine the strength of the concrete, and depending on the project or environment, some mixes may not be suitable. A “prescribed mix” is when the purchaser prescribes the exact composition of the concrete and is responsible for ensuring these proportion produce concrete with it’s required performance. A “design mix” is when the engineer specifies the required performance and the concrete producer will select the mix to achieved the specified performance. The concrete will be tested via concrete cube test to ensure compliance with the specified performance.