1. Objectives of Mix Design

Try these first

1. 1.

   What is the primary goal of mix design?

   Hint

   Think about what characteristics we need from concrete.

2. 2.

   Why is workability important?

   Hint

   Consider how concrete is applied in construction.

3. 3.

   What is the primary objective of mix design?

   • To determine the cost
   • To achieve desired concrete properties
   • To select materials

   Hint

   Think about what properties we need from concrete.

4. 4.

   True or False: The water-cement ratio determines the concrete's workability.

   • True
   • False

   Hint

   Consider how changing water content affects mixing.

5. 5.

   A project requires concrete with a compressive strength of 40 MPa. If the characteristic strength is 30 MPa with a risk factor of 1.65 and standard deviation of 5, what is the target mean strength needed?

   Hint

   Use the target mean strength formula!

6. 6.

   Describe how you might adjust your mix design if your initial concrete showed low workability.

   Hint

   Think about the materials you can modify.