Therefore, the ratio of masses of these materials w.r.t. The mix proportion of 1:1.5:3 by dry volume of materials can be expressed in terms of masses as: The percentage of entrained air assumed is 2%. Specific gravities of concrete materials are as follows: Assuming bulk densities of materials per cubic meter, cubic feet and cubic yards as follows:Ĭement = 1500 kg/m3 = 93.642 lb/ft3 = 2528.332 lb/cubic yards The water cement ratio required for mixing of concrete is taken as 0.45. Calculation Results: Quantities of MaterialsĬalculating Quantities of Materials for per cubic meter or cubic feet or cubic yards concreteĬonsider concrete with mix proportion of 1:1.5:3 where, 1 is part of cement, 1.5 is part of fine aggregates and 3 is part of coarse aggregates of maximum size of 20mm.Concrete Calculator: Calculate Quantities of Materials for Concrete.Calculating Quantities of Materials for per cubic meter or cubic feet or cubic yards concrete.Now we will learn the material calculation by an example. This method of calculation for quantities of materials for concrete takes into account the mix proportions from design mix or nominal mixes for structural strength and durability requirement. The air content has been ignored in this calculation. S c, S fa and S ca are the specific gravities of cement, fine aggregates and coarse aggregates respectively. Where, V c = Absolute volume of fully compacted fresh concrete The formula for calculation of materials for required volume of concrete is given by: Suitable formula shall be used for different cross-sectional shapes of members. The volume of a rectangular cross sectional member can be calculated as length x width x height (or depth or thickness). The volume of concrete required for concrete structure can be calculated by summing up the volumes of each structural member or each parts of members. cement, sand, coarse aggregates and water.Ī Concrete structure may consists of beams, slabs, columns and foundations etc. This method is based on the principle that the volume of fully compacted concrete is equal to the absolute volume of all the materials of concrete, i.e. □ Reading time: 1 minuteQuantities of materials for concrete such as cement, sand and aggregates for production of required quantity of concrete of given mix proportions such as 1:2:4 (M15), 1:1.5: 3 (M20), 1:1:2 (M25) can be calculated by absolute volume method.
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