Materials Required For 1m3 Concrete In All Design Mix

What is concrete

Concrete is a main and important structural material in construction, it is a mixture of cement, fine aggregate (sand), coarse aggregate (stone), and water. Concrete consists of a hard, chemically inert particular substance.

What is the design mix?

There are different types of design mixes used in concrete. design mix means, selecting the suitable materials (cement, fine aggregate, coarse aggregate) and the material determining their relative proportion to produce concrete having minimum workability, durability, and strength of the concrete as economically as possible.

Example

M25 design mix of concrete The ratio of the mix = 1:1:2 (1 part of cement, 1 part of fine aggregate, 2 parts of coarse aggregate )

M25- the compressive strength of the concrete cube after 28 days of curing is 25kn/m3

M – mix and compressive strength of concrete cube after 28 days of curing

25 – compressive value (25 N/mm3)Cube dimension = 150mm x 150mm x 150mm (or) 100mm x 100mm x 100mm

Different types of design mixes and their ratio

Nominal grade concrete

Concrete grade	Concrete mix ratio	Compressive strength (n/mm2)
M5	1:5:10	5
M10	1:3:6	10
M15	1:2:4	15
M20	1:1.5:3	20

Standard grade concrete

Concrete grade	Concrete mix ratio	Compressive strength (n/mm2)
M25	1:1:2	25
M30	Design mix	30
M35	Design mix	35
M40	Design mix	40
M45	Design mix	45

High strength concrete

Concrete grade	Concrete mix ratio	Compressive strength (n/mm2)
M50	Design mix	50
M55	Design mix	55
M60	Design mix	60
M65	Design mix	65
M70 and above	Design mix	70 and above

Materials required for 1m3 M20 nominal mix concrete

M2O MIX

M20 = 1:1.5:3 (cement: fine aggregate: coarse aggregate )

Cement

= ((part of cement) / (sum of ratio)) x total volume required

Part of cement = 1

Sum of ratio = (1+1.5+3) = 5.5

The total volume required = Wet volume x dry volume

Wet volume = Actual required volume, Dry volume = 1.54 (for concrete)

What is dry volume? why 1.54 in concrete? CLICK HERE

Total volume = ( 1 x 1.54 )

= 1.54 m3so, = ( 1/5.5 ) x 1.54= 0.28 m3

Unit weight of cement = 1440 kg/m3

= 0.28 x 1440 = 403.2 kg

What is the unit weight? 1440? CLICK HERE

1 bag cement = 50kg = 403.2 / 50
= 8.064 ~ 8 bags or 8.1 bag

Fine aggregate

= ((part of fine aggregate) / (sum of ratio)) x total volume required
= ( 1.5/5.5 ) x 1.54= 0.42 m3 (or) 14.83 cubic feet

Unit conversions? CLICK HERE

Unit weight of F.A = 1600 to 1840 kg/m3 take 1600 kg/m3= 0.42 x 1600=672 kg of fine aggregate required

Coarse aggregate

= ((part of coarse aggregate) / (sum of ratio)) x total volume required= ( 3/5.5 ) x 1.54 = 0.84 m3

Unit weight of C. A = 1200 to 1750kg/m3 ( density of coarse aggregate may go higher if void spaces decrease. 5mm coarse aggregate has more density when compared to 20mm size coarse aggregate )

= 1450 to 1750kg/m3 ( ASTM ) American society for testing and materials
so, assume = 1560 kg/m3 = 0.84 x 1560= 1310.4 kg of coarse aggregate required

Water

Assume water-cement ratio = 0.50 ( 50% of cement )= 403.2 x 0.50 = 201.6 kg= 201.6 liter ~ 200 (or) 201 liter of water required

Summary

Materials required for 1m3 of M20 concrete

Cement = 8 bags (1 bag = 50kg)
Fine aggregate = 672 kg
Coarse aggregate = 1310.4 kg
water = 200 litre

Concrete Materials Calculator ( Cement, Fine aggregate, Coarse aggregate, and Water ) – ” Click Here “

Materials required for other design mixes in 1m3

M5

Cement = 2.60bags
Fine aggregate = 752 kg
Coarse aggregate = 1466.4 kg
water = 65 litre

M7

Cement = 3.40 bags
Fine aggregate = 736 kg
Coarse aggregate = 1419.6 kg
Water = 85 litre

M10

Cement = 4.40 bags
Fine aggregate = 720 kg
Coarse aggregate = 1419.6 kg
Water = 110 litre

M15

Cement = 6.40 bags
Fine aggregate = 704 kg
Coarse aggregate = 1357.2 kg
Water = 160 litre

M20

Cement = 8 bags
Fine aggregate = 672 kg
Coarse aggregate = 1310.4 kg
water = 200 litre

M25

Cement = 11.20
Fine aggregate = 624 kg
Coarse aggregate = 1216.8 kg
Water = 280 litre