Recommended Concrete Mixes for Various Types of Construction Works:

Various types of concrete construction requires different concrete mixes for its construction. The recommended value of these concrete  mixes for various types of construction is presented in table below:

Table: Recommended mixes for Different Concrete Construction

Type of workConcrete Mix RatioMax. size of aggregates (mm)Water for dry aggregates (liter)*Water for aggregates condition from dry to moist batch (liter)*Water for best consistency (liter)*
Small precast work, fence posts, poles, garden furniture and other work of very thin sections1:2:2162015 to 16Soft
Storage tanks, cisterns, sewers, well knerbs, watertight work, and columns or other structural parts subjected to high stresses1:2:3202519 to 22Medium
Reinforced concrete work, floor slab, beams, columns, arches, stairs etc1:2.5:3.5203223 to 27Medium or soft
Ordinary floors, footpaths, drive ways, steps, roads, pavements1:2.5:3.5202320 to 23Stiff
Building and basement walls, silos, sills, lintels, machine foundations subject to vibration, bridges, dams, piers, etc exposed to action of water and frost foundation concrete for masonry walls1:2:4403023 to 26Stiff or Medium
Culverts, retaining walls, compound walls, ordinary machine bases, etc.1:3:5403426 to 30Stiff or Medium
Mass concrete for heavy walls, lean concrete for levelling course of RCC foundations1:3:6633630 to 32Medium

*for one cement bag batch

NOTES: When both fine and coarse aggregates are poorly graded, the following general rules regarding suitable proportioning of these will be found helpful:

  1. For maximum size of coarse aggregates as 40mm and over, sand should be half as much as coarse aggregates.
  2. For maximum size of coarse aggregates as 20mm and over, sand should be two-thirds as much as coarse aggregates.
  3. For maximum size of coarse aggregates as 16mm, sand and coarse aggregates should be in equal parts.

Read More:

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Tests for Water Quality for Concrete Construction and Recommended Limits

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High Strength and High Performance Concrete Materials and Difference