Class Cement

per bag

Sand

per M3

Gravel

Per M3

Water

Per gallon

Strength

PSI

Uses

AAA 1 1 2 6 4,500 Pre- stresses and

Post - tensioned

AA 1 1 1/2 3 6 4,000 Underwater retaining wall, shear

wall and elevator core walls

A 1 2 4 6 3,500 Footings, pier, columns, girders,

beams, joists and slabs

B 1 2 1/2 5 6 3,000 Slabs on fill and non – load

bearing wall or

4” CHB

C 1 3 6 6 2,500 Concrete plant boxes and parapet

walls

D 1 3 1/2 7 6 2,000 Plant boxes, footpaths, walkway

and lean concrete