19. Example Mix Design – M25 Grade (Using IS 10262:2019)

Try these first

1. 1.

   What does M25 signify in concrete mix?

   Hint

   Think about how much weight M25 can support.

2. 2.

   What is W/C ratio?

   Hint

   This ratio affects the strength of concrete.

3. 3.

   What is the characteristic strength of M25 concrete?

   • 25 MPa
   • 30 MPa
   • 20 MPa

   Hint

   Think about the values associated with M grades.

4. 4.

   True or False: The W/C ratio affects both the strength and workability of concrete.

   • True
   • False

   Hint

   Recall how water impacts concrete properties.

5. 5.

   Calculate the total weight of the materials needed for 5 m³ of M25 concrete using a W/C ratio of 0.45.

   Hint

   Remember to multiply by the total volume of concrete you are designing for.

6. 6.

   If the specific gravity of aggregates changes, how would you adjust the mix calculations?

   Hint

   Think about how density affects volume calculations.