7.5. Durability Considerations in HPC Proportioning

Try these first

1. 1.

   What effect does lowering the water-binder ratio have on permeability?

   Hint

   Think about how water affects the density of concrete.

2. 2.

   Name a material that improves chloride penetration resistance.

   Hint

   Consider additives that make concrete denser.

3. 3.

   What does lowering the water-binder ratio do to permeability?

   • Increases it
   • Decreases it
   • Has no effect

   Hint

   Think about how water affects compressive strength.

4. 4.

   True or False: Silica fume is ineffective in improving the durability of concrete.

   • True
   • False

   Hint

   Recall the effects of silica fume discussed in class.

5. 5.

   Analyze a concrete structure's exposure to sulfate-rich environments. What mix design elements should you consider to ensure durability?

   Hint

   List down environmental conditions and their effects on concrete.

6. 6.

   Evaluate a situation regarding freeze-thaw damage in an existing structure. Propose a remediation strategy to improve its durability.

   Hint

   Think about adding layers and what keeps them together.