18.2.3.b. Shape and Texture

Try these first

1. 1.

   Why are rounded aggregates preferred for workability?

   Hint

   Think about how smoothness helps in mixing.

2. 2.

   What is workability?

   Hint

   Consider the quality of the concrete's mixing process.

3. 3.

   What type of aggregates offer better workability?

   • Rounded Aggregates
   • Angular Aggregates
   • Both

   Hint

   Consider the smoothness of the aggregate.

4. 4.

   True or False: Angular aggregates can enhance the strength of concrete.

   • True
   • False

   Hint

   Think about how shapes interact in a mix.

5. 5.

   Design a concrete mix for a structure requiring high strength but that also needs to be placed in a tight area. Explain the selection of aggregates based on their shape and texture.

   Hint

   Think about the balance between strength and placement ease.

6. 6.

   Discuss how you would modify a concrete mix that is overly difficult to work with due to angular aggregates.

   Hint

   Identify additives that can help achieve better flow and consistency.