7.5.1. Workability of Special Concretes

Try these first

1. 1.

   What is Self-Compacting Concrete?

   Hint

   Think about what allows it to fill formwork without vibration.

2. 2.

   What is the purpose of fibers in Fiber-Reinforced Concrete?

   Hint

   Consider how they improve the material's overall performance.

3. 3.

   What is the slump flow value range for Self-Compacting Concrete?

   • 400-600 mm
   • 650-800 mm
   • 900-1000 mm

   Hint

   Consider its high fluidity requirement.

4. 4.

   True or False: Fibers in Fiber-Reinforced Concrete can improve workability.

   • True
   • False

   Hint

   Think about their impact on flowability.

5. 5.

   Design a mix for Fiber-Reinforced Concrete that minimizes balling while maintaining strength. What materials would you choose?

   Hint

   Think about balancing fiber percentages with other mix components.

6. 6.

   Evaluate the impact of using air-entraining agents in Lightweight Concrete on its compressive strength during curing.

   Hint

   Consider how air affects strength and mixing.