How to calculate cement, sand and coarse aggregate quantity in concrete?

Quantity of materials such as Cement, sand and coarse aggregate  for concrete can be calculated by absolute method. In this method , the volume of fully compacted concrete is equale to the absolute volume of all the material pf concrete i.e. Cement, Sand, water, admixture and coarse aggregate. Concrete structure may be type of slab, column, footing, staircase,, curb stone, circular column which is based on type of structure. The volume of the concrete required for this, can be calculated by summing up the volumes of each structure member.

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For example:-

The volume of the rectangular column can be calculated as Length X width X Height.

The suitable formula is used for different shapes.

Concrete calculator calculation- Calculate quantities of material for concrete

Concrete volume= 124 m³

Dry volume= 1.55 m³

Calculate Cement, Sand, Coarse aggregates and admixture

Mix design is M20

Mix Ratio for M20 is 1: 2.48: 3.55

Calculate concrete parts using by formula

Concrete parts = Cement part + sand part + aggregate part + admixture

Cement Quantity

Cement quantity = (Cement part / Concrete parts) * Concrete volume * Dry Volume

Cement quantity = (1/7.04) * 124 *1.55 =27.30 m³

Density of cement = 1440 kg/m³

Weight of cement = 27.3 * 1440 = 39313.64 Kg

Weight of cement bags = 50kg

Total bags = 39313.64 / 50 = 786 cement Bags

Sand quantity

Sand quantity = (2.48 / 7.04) * 124 * 1.55 = 67.707 m³

Aggregate Quantity

Aggregate Quantity = (3.55 / 7.04) * 124 * 1.55 = 96.919 m³

Admixture Quantity

Admixture quantity = Cement quantity * Admixture

Admixture quantity = 39313.636 * 0.01 = 393.136 Kg

Water Quantity

Water quantity = Cement volume * water-cement ratio

Water quantity = 27.301 * 0.5 = 13.650 m³

Unit weight of water = 1000 Liters/m³

Required amount of water = 13.650 * 1000 = 13650 Litres

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Calculation Results

 

Material         Quantity

Cement           39313.636 Kg

Sand                67.707 m³

aggregate       96.919 m³

Admixture     393.136 kg

Water              13650.568 Litres