How much cement sand & aggregate required for M15 concrete, hi guys in this article we know about how much cement sand & aggregate required per 1m3 of m15 grade of concrete & also know about how much cement required for M15 concrete & how to calculate cement sand aggregate required for 1 cubic metre of m15 grade of concrete.

**Different grade of concrete** like M25,M20,M15,M10,M7.5 & M5 are nominal mix grade of concrete in which M represent mix and numerical figure 25, 20, 15,10,7.5 & 5 are characteristics of compressive strength of concrete gain strength time period of 28 days after curing.

● **Table 1 :**– different grade of concrete and their compressive strength in N/mm2.

● **Understanding grade of concrete**:- Grades of concrete are defined by its strength and composition of the concreting material cement sand and aggregate and the minimum strength the concrete should have following 28 days of initial construction. The grade of concrete is understood in measurements of N/mm2 or MPa, where M stands for mix and the MPa denotes the overall characteristics of compressive strength.

● **concrete grade types :**– there are three types of concrete grade 1) normal grade of concrete, 2) standard grade of concrete& 3) high strength concrete grade. Normal grade of concrete are based on nominal mix ratio of cement, sand and aggregate have comparatively lower compressive strength than standard grade of concrete.

**Normal grade of concrete** are M25,M20,M15,M10,M7.5 & M5 generally based on nominal mix proportion of cement sand and aggregate.

**Standard grade of concrete** are M25,M30,M35,M40,& M45 are made according to design mix have higher compressive strength than normal grade of concrete.

**High strength concrete grade** are M50,M55,M60,M65, & M70 are made according to design mix have higher compressive strength than normal and standard grade of concrete.

According to nominal mix concrete IS456 code book suggest that minimum grade of concrete is M20 which are used for RCC work and M5,M7.5, M10 and M15 are not used for RCC work, generally lower grade of concrete are used in mass concreting, formation of heavy wall, ground filling, retaining wall formation and all PCC work.

**standard grade of concrete and high** strength concrete are used to construction of high rise building, industrial building, commercial building, residential building, apartment, Bridge, dams and heavy structure.

● **Table 2** :- different grade of concrete and its types

● **cement sand and aggregate mix ratio in concrete** :- there are two types of mix ratio in in different grade of concrete 1) nominal mix & 2) design mix.

**Nominal mix concrete IS456 code book** suggest lower and normal grade of concrete like M25,M20,M15,M10,M7.5 & M5 have fix cement sand and aggregate ratio.

**Design mix concrete IS 456 code book** suggest that standard and high strength concrete grade are made according to different types of considering factor like load bearing structure, earthquake resistance, bending moment of column, Environmental factors and quality of cement sand and aggregate.

● **Table 3:-** grade of concrete types, it’s mix ratio types and mix ratio of concrete.

**How much cement sand and aggregate are required for 1m3 of m15 concrete**

**M15 concrete ratio:-** **M** stand for mix and numerical figure **15** is compressive strength of concrete is **15N/mm2** for **curing** time of **28** days and **m15 concrete** **ratio** is 1:2:4 in which one part is cement, 2 part is sand and 4 part is aggregate mix with water.

**M15 ****ratio** is 1:2:4 in which one part is cement, 2 part is sand and 4 part is aggregate mix with water.

Calculating quantity of cement, sand and aggregate required for 1 cubic metre of m15 concrete we have given following:-

Wet volume of concrete = 1m3

mix ratio for m15 concrete = 1:2:4

We have to do following calculating steps:-

● **Step 1 :-** we have wet volume of concrete is equal to 1 cubic metre (1m3), but when we calculate actual quantity of dry ingredient cement, sand and aggregate of concrete.

Dry volume of concrete is equal to 1× 1.54 = 1.54 m3 ( cubic meter)

● **step 2 :-** m15 nominal mix ratio is 1:2.4,in which one part is cement, 2 part is sand & 4 part is aggregate, then total mix proportion is equal to 1+2+4 = 7, and part of cement is equal to 1/7, part of sand is equal to 2/7 & part of aggregate is equal to 4/7

**How much cement required for M15 concrete**

● **step 3:-** We have dry volume of concrete is equal to 1.54 m3, part of cement in mix = 1/7 and density of cement = 1440 Kg/m3

**How much cement required for M15 concrete in cubic metre**

● **step 4:**– calculate cement required for 1 cubic metre of M15 concrete in cubic metre is equal to = 1/7 × 1.54 m3 = 0.22 m3

**Ans. :-** 0.22 m3 ( cubic meter) cement required for 1 cubic metre of M15 concrete.

**How much cement required for M15 concrete in Kgs**

● **step 5:-** calculate cement required for 1 cubic metre of M15 concrete in Kgs ( kilogram) is equal to = 1/7 × 1.54 m3 × 1440 Kg/m3 = 317 Kgs

Ans. :- 317 Kgs quantity of cement required for 1 cubic metre of M15 concrete

**How many cement bags required for M15 concrete**

● step 6:- we know that 1 bag cement weight = 50 kgs,calculate cement bags required for 1 cubic metre of M15 concrete is equal to = 1/7 × 1.54 m3 × 1440 Kg/m3/50 = 6.34 = 6.34 bags cement

Ans. :- 6.34 bags of cement required for 1 cubic metre of M15 concrete.

Now question is how much cement required for 1m3 of M15 concrete their answer is following:-

Ans. :- 6.34 bags (0.22 m3, 317 kgs) cement are required for 1 cubic metre of M15 concrete.

**How much sand required for M15 concrete**

We have given dry volume of concrete is equal to 1.54 cubic metre and part of sand in concrete mix is equal to 2/7, density of sand is equal to 1620 Kg/m3 and one cubic metre is equal to 35.3147 cu ft

**How much sand required for M15 concrete in cubic metre**

● step 7 :- calculate sand required for 1 cubic metre of M15 concrete in cubic metre is equal to 2/7 × 1.54 = 0.44 m3

Ans. :- 0.42 m3 quantity of sand is required for 1 cubic metre of M15 concrete

**How much sand required for M15 concrete in Kgs**

● step 8 :- calculate sand required for 1 cubic metre of M15 concrete in kgs ( kilogram) is equal to 2/7 × 1.54m3 × 1620 Kg/m3 =713Kgs

Ans. :- 713 Kgs quantity of sand is required for 1 cubic metre of M15 concrete

**How much sand required for M15 concrete in cft**

● step 9 :- calculate sand required for 1 cubic metre of M15 concrete in cft (cubic feet) is equal to 2/7 × 1.54m3/35.3147 × 1620 Kg/m3 = 20 cft

Ans. :- 20 cft quantity of sand is required for 1 cubic metre of M15 concrete.

Now question is how much sand required for 1m3 of M15 concrete their answer is following:-

Ans. :- 20 cft (0.44 m3, 713 kgs) sand are required for 1 cubic metre of M15 concrete.

**How much aggregate required for M15 concrete**

We have given dry volume of concrete is equal to 1.54 cubic metre and part of aggregate in concrete mix is equal to 4/7, density of aggregate is equal to 1550 Kg/m3 and one cubic metre is equal to 35.3147 cu ft

**How much aggregate required for M15 concrete in cubic metre**

● step 10 :- calculate aggregate required for 1 cubic metre of M20 concrete in cubic metre is equal to 4/7 × 1.54 = 0.88 m3

Ans. :- 0.88 m3 quantity of aggregate is required for 1 cubic metre of M15 concrete

**How much aggregate required for M15 concrete in Kgs**

● step 11 :- calculate aggregate required for 1 cubic metre of M15 concrete in kgs ( kilogram) is equal to 4/7 × 1.54m3 × 1550 Kg/m3 = 1364 Kgs

Ans. :- 1364 Kgs quantity of aggregate is required for 1 cubic metre of M15 concrete

**How much aggregate required for M15 concrete in cft**

● step 12 :- calculate aggregate required for 1 cubic metre of M15 concrete in cft (cubic feet) is equal to 4/7 × 1.54m3/35.3147 × 1550 Kg/m3 = 39 cft

Ans. :- 39 cft quantity of aggregate is required for 1 cubic metre of M15 concrete.

Now question is how much aggregate required for 1m3 of M15 concrete their answer is following:-

Ans. :- 39 cft (0.88 m3, 1364 kgs) aggregate are required for 1 cubic metre of M15

concrete.

Now question is how much cement sand and aggregate required for 1 cubic metre of m15 concrete? Their ans will be following

● Ans. 6.34 bags (0.22 m3, 317 kgs) cement, 20 cft (0.44 m3, 713 kgs) sand & 39 cft (0.88 m3, 1364 kgs) aggregate are required for 1 cubic metre of M15 concrete.

● **Table 4 :-** cement quantity in bags and kg and aggregate and sand quantity in cubic metre,cubic feet and kg of m15 concrete

**Weight of sand & aggregate required for 50 kg cement bag for M15 grade of concrete**

As we find 6.34 bags of cement,713 kgs sand & 1364 kgs aggregate for 1 cubic metre of m15 grade of concrete.

Hance 6.34 bags cement = 713 kgs sand

For 1 bag of cement = 713/6.34= 112 kgs sand

Hance 6.34 bags of cement = 1364 kgs aggregate

For 1 bag of cement = 1364/6.34 = 215 kgs aggregate

● Ans. :- 112 kgs sand & 215 kgs aggregate are required per 50 kg of cement bag for m15 grade of concrete.

**Volume of sand & aggregate required for 50 kg cement bag for M15 grade of concrete**

As we find 6.34 bags of cement,20 cft sand & 39 cft aggregate for 1 cubic metre of m15 grade of concrete.

Hance 6.34 bags cement = 20 sand

For 1 bag of cement = 20/6.34= 3.16 cft sand

Hance 6.34 bags of cement =39 cft aggregate

For 1 bag of cement = 39/6.34 = 6.15 cft aggregate

● Ans. :- 3.16 cft sand & 6.15 cft aggregate are required per 50 kg of cement bag for m15 grade of concrete.

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