Various types of concrete construction requires different concrete mixes for its construction.
Best concrete mix for slab.
1 part portland cement 1 5 part gravel 1 part sand 5 part water.
Recommended concrete mixes for various types of construction works.
This thickness is in addition to a 2 3 inch base of gravel sand limestone or another aggregate a strength of 4 000 psi pounds per square inch after a one month cure is the industry minimum for concrete driveways slabs and sidewalks.
Determining the right concrete mix design and reinforcement requirements for the anticipated slab exposure and traffic conditions is essential as well.
Size of aggregates mm water for dry aggregates liter.
You ll need to calculate the proper water cement ratio and air entrainment requirements for the concrete mix to ensure that the slab will perform as intended.
A drier mix is more difficult to pack into your form especially around the edges but makes for a stronger more crack resistant slab.
To that end this ratio is made up of 1 part cement powder 2 parts sand and 3 parts washed aggregate.
Drier mix is better adding water to the concrete makes it flow down the chute and fill your forms more easily but it also weakens the final slab.
Reinforced concrete work floor slab beams columns arches stairs etc.
Available from diy stores and ready mix concrete companies these contain soluble emulsions that form a protective film when sprayed directly onto the surface of newly poured concrete slabs or walls.
Water can then be added at any desired volume to achieve the desired consistency.
For concrete driveways slabs and sidewalks a pour of 4 inches in thickness is typical.
3000 psi concrete mix ratio.