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.
Best concrete mix for slab.
For concrete driveways slabs and sidewalks a pour of 4 inches in thickness is typical.
Reinforced concrete work floor slab beams columns arches stairs etc.
1 part portland cement 1 5 part gravel 1 part sand 5 part water.
Various types of concrete construction requires different concrete mixes for its construction.
The 1 2 3 ratio s make up is described right in its name.
Best product s to use sakrete 5000 plus sakrete maximizer or sakrete crack resistant concrete mix sakrete 5000 plus and sakrete maximizer are durable highly versatile concrete products that both provide professional strength of at least 5000 psi making them ideal for creating strong stable concrete slabs driveways walkways and much more.
Determining the right concrete mix design and reinforcement requirements for the anticipated slab exposure and traffic conditions is essential as well.
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.
517 pounds of cement or 234kg 1560 pounds of sand or 707kg 1600 pounds of stone or 725kg 32 34 gallons of water or 132l.
A drier mix is more difficult to pack into your form especially around the edges but makes for a stronger more crack resistant slab.
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.
Size of aggregates mm water for dry aggregates liter.
To that end this ratio is made up of 1 part cement powder 2 parts sand and 3 parts washed aggregate.
Water can then be added at any desired volume to achieve the desired consistency.