8. Workability of Fresh Concrete

Try these first

1. 1.

   Define workability in concrete.

   Hint

   Think about the handling attributes of wet concrete.

2. 2.

   Name one factor that affects workability.

   Hint

   Consider what happens when you add more or less water.

3. 3.

   What is the primary purpose of the slump test?

   • To measure strength
   • To assess workability
   • To check durability

   Hint

   Consider why you'd check how mix settles.

4. 4.

   True or False: Adding more water always increases the strength of concrete.

   • True
   • False

   Hint

   Think about the balance between workability and strength.

5. 5.

   Design a concrete mix for a hot climate. What factors will you consider to ensure optimal workability?

   Hint

   Think about temperature impacts on mixing times.

6. 6.

   Calculate the impact of water-cement ratio on the strength of concrete if suddenly the water content in mix increases by 30%. What’s the likely outcome?

   Hint

   Recall how water strengthens and weakens concrete.