Understanding the Quantities of Materials Needed for Concrete and Mortar Mixtures

When it comes to creating concrete and mortar, the amount of materials like cement, sand, coarse aggregates, and water required per cubic meter varies based on the mix design. Let’s delve into the details and explore the estimated quantities for different mix proportions.

Concrete Mix Proportions

In the table below, you’ll find the estimated quantities of materials per cubic meter of concrete for various nominal mixes:

Nominal Mix Water Cement Ratio Water per 50Kg Bag of Cement Cement (Kg) Sand (CUM) Crushed Stones (CUM)
1 1 0.25 12.5 1015
1 1.5 0.28 14 815
1 2 0.3 15 687
1 2.5 0.35 17.5 585
1 3 0.4 20 505
1 4 0.53 26.5 395
1 6 0.7 35 285
1 8 0.9 45 220
1 1 2 0.3 15 560

Notes:

  1. Fine Aggregates (F.A.) and Coarse Aggregates (C.A.): The table assumes voids in sand and crushed stone are 40% and 45%, respectively.
  2. Air Content: A 1% air content is assumed.
  3. Gravel Aggregates: For gravel aggregates, adjust cement by reducing it by 5%, increasing sand by 2%, and adjusting coarse aggregate proportionally to fine aggregate in the mix.
  4. Bulking and Wastage: No allowance has been made for bulking of sand and wastage.

By referring to these estimates, engineers and construction professionals can accurately plan their concrete and mortar mixtures for various construction projects, ensuring optimal performance and resource utilization.

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