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To make 1 cubic metre of concrete you will need: 385 kg cement + 0,62 cubic metres sand + 0,62 cubic metres stone. High-strength concrete suitable for: precast concrete, heavy-duty floors. To make 1 cubic metre of concrete you will need: 460 kg cement + 0,60 cubic metres sand + 0,60 cubic metres stone.
According to Fulton’s Concrete Technology published by the CCI, which has a chapter on concrete mix design (maybe there’s a copy in your school library?), high-performance concrete with a 28-day compressive strength of 68,9 MPa = high strength concrete.
Using our concrete calculator is as easy as 1, 2, 3. All you have to do is enter the dimensions of the projected area for coverage, and we will provide you with an instant result for how much concrete you’ll need.
This option is supplied as readymixed concrete. For site mix calculations, refer to the concrete calculator. Please note: Wastage of 5% to be allowed.
Concrete mixes ratios by weight are a crucial aspect of concrete construction, determining the proportions of various ingredients needed to create a durable and structurally sound concrete mix. These ratios typically include cement, water, aggregate (sand and gravel), and sometimes additives or admixtures.
What is the correct batch ratio for mixing concrete? The ratio of cement to river sand and stone determines the strength of the concrete. Here is a cheat sheet to ensure that you have the right strength of concrete for the job.
The mix proportions given in the table overleaf are conservative. If the quantity of concrete to be made exceeds about 100 m3, it is probably possible to save costs by selecting materials and having a mix designed. For information on the choice of materials consult The Concrete Institute.
