2.2. Bleeding

Try these first

1. 1.

   What is bleeding in concrete?

   Hint

   Think about how water behaves in a solid matrix.

2. 2.

   What is laitance?

   Hint

   What's the condition of the surface when water rises?

3. 3.

   What is a major effect of bleeding in concrete?

   • Increased viscosity
   • Weaker surface layer
   • Lower workability

   Hint

   Think about how the surface interaction impacts strength.

4. 4.

   True or False: Increasing the water content always improves the workability of concrete.

   • True
   • False

   Hint

   Balance is key in concrete mix design.

5. 5.

   Consider a construction project where bleeding was a significant issue. What steps would you recommend to mitigate its effects in future projects?

   Hint

   Focus on the relationship between material composition and concrete behavior.

6. 6.

   Analyze a scenario where excessive bleeding led to structural failure after a few years. What underlying mix design flaws might have contributed to this issue?

   Hint

   Think about the entire concrete placing process.