M25 Concrete Ratio (1:1:2) : Uses & Materials Required

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M25 concrete ratio is 1:1:2, which indicates the ratio of cement : sand : aggregate.

✔ It simply means that if 1 kg cement is employed for making Concrete, you should use 1 kg sand and 2 kg aggregate. ( i.e. 1 part cement: 1 part sand: 2 parts aggregate )

✔ In M25 concrete,

m25 concrete ratio

“M” stands for Mix ratio of cement:sand: aggregate  &  “25 “Stands for Compressive Strength @ 28 Days in N/mm².

✔ M25 Concrete is nominal Concrete that can be skillfully prepared using  Indian Standard IS 456:2000.

✔ Normally, about 38% of water is required for the complete hydration of Concrete.

As per Indian Standard IS 456:2000, for nominal mix ( i.e. M10, M15…, M25);  the w/c ratio varies from 0.4 to 0.6.

For M25 Concrete, commonly w/c ratio of 0.4 to 0.45 is used.

 


 

  1. Table1: M25 Concrete Ratio – Overview  

 

CodeIndian Standard IS 456:2000
Ratio1:1:2
Compressive Strength25 MPa
{ Note: MPa = N/mm²}
Uses 

Used in RCC works like;

a. Used in the construction of rigid pavements with high traffic.

b. Used to construct structural members like slabs, beams, columns, etc. of bridges and buildings.

( Commonly used for heavy structures or work)

Grade CategoryStandard Grade ( Nominal Mix )
Required  Water Cement Ratio  

a. For high-quality concrete works; 0.4 w/c ratio is specified.

b. Minimum water-cement ratio: 0.40

c. Maximum water-cement ratio: 0.45

d. If plasticizers or superplasticizers are used, the w/c ratio may vary between 0.35 and 0.4.

 


 

  2. M25 Concrete Ratio Uses  

This concrete grade is commonly used for medium to large-scale constructions. Some common uses of the M25 Concrete Ratio are:

 

m25 grade concrete ratio

 

✔ Used in the construction of rigid pavements with high traffic.

✔ Used to construct structural members like slabs, beams, columns, bridges, etc.

✔ Used in constructing retaining walls where heavy loads have to be retained.

 


 

  3. Cement Sand Aggregate Calculation For 1 m³ M25 Concrete Ratio  

 

Data per 1 m³

MaterialVolume Required (m3)Bag / FarmaMaterials Required in kg
Cement0.38511.1 Bags554.4 Kg
Fine Aggregate0.38511 Farma619.85 Kg
Coarse Aggregate0.7722 Farma1359.82 Kg
Water0.23230kg ( Average )

 

Things To Know!!

Density of Cement = 1440 kg/m3

Density of Sand = 1450-1500 Kg/m3

Density of Aggregate = 1450-1550 Kg/m3

Weight of Cement in 1 Bag = 50 Kg

The volume of 1 Bag of Cement in Cubic meter = 0.03472 m3

 

Now, Taking

Grade of Concrete = M25 Concrete

Mix Ratio = 1:1:2

Total sum of ratio =1+1+2 =4

Wet volume of Concrete = 1 m3

To get dry volume, wet volume is increased by 54%

Dry volume of concrete = 1 + 0.54 = 1.54 m³

 

i. Cement Quantity Calculation

Quantity of cement = (Own Ratio/ Total sum of ratio) * Dry Volume

= ( 1/4 ) * 1.54

=  0.385 m³

Cement in kg = volume of cement * density of cement

= 0.385 * 1440

= 554.4 kg

 

ii. Sand Quantity Calculation 

Quantity of sand = (Own Ratio/ Total sum of ratio) * Dry Volume

= ( 1/4 ) * 1.54

=  0.385 m³

 

iii. Aggregate Quantity Calculation 

Quantity of aggregate = (Own Ratio/ Total sum of ratio) * Dry Volume

= ( 2/4 ) * 1.54

=  0.77 m³

 

iv. Water Quantity Calculation 

Minimum amount of water required per m³ = 0.4*554.4 = 221.76 kg = 221.76 L

Maximum amount of water required per m³ = 0.45*554.4 = 249.48 kg = 249.48 L

 

  4. References  

1.  Indian Standard IS 456:2000

 

Read Also: Grades of Concrete
Verified Article By Er. Madhu Krishna Poudel

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