That is because it is among the most versatile mix ratios regardless of what scale it is being used at.
Concrete mix ratio for roof slab.
Concrete mix ratio for beams.
Where cement concrete 1 1 5 3 is used.
The recommended value of these concrete mixes for various types of construction is presented in table below.
2 concrete mix ratio.
One of the best concrete mix ratios is 1 part cement 3 parts sand and 3 parts aggregate this will produce approximately a 3000 psi concrete mix.
The 1 2 3 concrete mix ratio is considered the classic mix ratio by many professional builders.
This ratio of concrete also gives very high strength of cement concrete and is recommended for following works.
Size of aggregates.
As we know that roof slab is rcc structure so we can use minimum grade of m20 grade and concrete mix ratio 1 1 5 3 for roof slab maximum grade of concrete m25 m30 and much higher are used as per design for roof slab.
As such it can productively be used in a wide variety of weight bearing projects.
Recommended mixes for different concrete construction type of work concrete mix ratio max.
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Concrete mix ratio for roof slab.
If i break the weights down per cubic yard of concrete it comes to.
702 5 pounds of cement.
1217 pounds of sand.
The 1 2 3 ratio s make up is described right in its name.
Materials required are 7 nos.
It means 1 part of cement 1 5 part of fine aggregate coarse sand and 3 parts of coarse aggregate.
Of 50 kg bag of cement 0 42 m 3 of sand and 0 83 m 3 of stone aggregate.
1 1 5 3 m20 is concrete mix ratio used for roof slab.
Structure carries in heavy loads.
Example calculation estimate the quantity of cement sand and stone aggregate required for 1 cubic meter of 1 2 4 concrete mix.
The strength of this mix ratio is good for most concrete slabs footings steps and foundation walls.
Rounded off it s basically a 1.
1587 pounds of stone.