7.1.6. Harshness

Try these first

1. 1.

   What defines harshness in concrete?

   Hint

   Think about the workability when using certain aggregates.

2. 2.

   Name one factor that causes concrete to be harsh.

   Hint

   Consider the size and shape of the materials.

3. 3.

   What primarily causes harshness in concrete?

   • High water-cement ratio
   • Angular coarse aggregates
   • Too many fines

   Hint

   Think about the shape of materials.

4. 4.

   True or False: Insufficient fines in a concrete mix can lead to increased harshness.

   • True
   • False

   Hint

   Consider what the fines do in the mixture.

5. 5.

   You are tasked with designing a concrete mix for a decorative walkway. What steps would you take to ensure low harshness during application?

   Hint

   Think about the steps in making a smooth surface.

6. 6.

   If a project suffers from frequent harshness issues, how might you validate the composition of materials being used?

   Hint

   Noticing aggregate properties can guide your adjustments.