22.13. Bond Strength with Existing Concrete and Steel

Try these first

1. 1.

   What is the bond strength that PMC typically achieves with old concrete?

   Hint

   Think about the units of pressure.

2. 2.

   Why is surface preparation important for bonding?

   Hint

   Consider how better surfaces help materials stick together.

3. 3.

   What is the bond strength achieved by PMC with old concrete?

   • Less than 1 MPa
   • 1.5 - 2 MPa
   • Greater than 1.5 MPa
   • 2.5 MPa

   Hint

   Consider the performance characteristics of PMC.

4. 4.

   True or False: Surface preparation does not affect bond strength.

   • True
   • False

   Hint

   Think about the steps needed before applying concrete.

5. 5.

   In a real construction project, PMC was applied without proper surface preparation. Analyze the potential consequences of this oversight in terms of bond strength and long-term structural integrity.

   Hint

   Reflect on consequences and consider the relationship between preparation and performance.

6. 6.

   Evaluate the impact of using different types of polymers in PMC on bond strength with existing concrete. Discuss potential trade-offs in various applications.

   Hint

   Think about the implications of material choices in engineering.