100 CFT (Cubic Feet) is solid or wet work, we find the quantity of Dry Material (Cement, Sand, and Aggregate).

We know, dry work 54% addition of wet works.

In other words,
Total dry works = 100+54% cft
=100+(100×0.54) cft
=100+54 cft
=154 cft

We need 15 Megapascal strength concrete for Floor mortar, So We using a 1:2:4 ( cement: sand: aggregates ) concrete ratio. [You will change the concrete ratio with you works type]

Sum Of Cement, Sand and Aggregate Ratio
=1:2:4
=1+2+4
=7

Quantity of Dry Material Cement, Sand, and Aggregate 

How Many Bags of Cement is 100 CFT Concrete?

Cement= [(Cement Ratio × Quantity of Dry Work) ÷ Sum of Rato] cft
=(1×154)÷7 cft
=154÷7 cft
=22 cft
=22÷1.25 bags [50kg 1bag cement = 1.25 cft, cement]
=17.6 bags
≈18 bags cement

How Much Sand is 100 CFT Concrete?

Sand= [(Sand Ratio × Quantity of Dry Work) ÷ Sum of Rato] cft
=(2×154)÷7 cft
=308÷7 cft
=44 cft

How Much Aggregate 100 CFT Concrete?

Aggregate= [(Aggregate Ratio × Quantity of Dry Work) ÷ Sum of Rato] cft
=(4×154)÷7 cft
=616÷7 cft
=88 cft

Grade of Concrete Ratio

What type of compressive strength to need for right different works using C: S: A (cement: sand: aggregates) Ratio.

Grades of Concrete	Ratio C:S:A	Strength MPa	Strength Psi	Comment
M25	1:1:2	25MPa	3625 psi	Footing, Column etc
M20	1:1.5:3	20MPa	2900 psi	Column, Grade Beam etc
M15	1:2:4	15MPa	2175 psi	Beam, Floor etc.
M10	1:3:6	10MPa	1450 psi	Ground Floor etc.
M7.5	1:4:8	7.5MPa	1087 psi	other
M5	1:5:10	5MPa	725 psi	other

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