2.4. Chemical Admixtures

Try these first

1. 1.

   What is the main purpose of chemical admixtures in concrete?

   Hint

   Think about the functions they serve.

2. 2.

   Name one type of chemical admixture.

   Hint

   Recall the terms we discussed in class.

3. 3.

   What type of admixture is used to increase workability?

   • Retarders
   • Superplasticizers
   • Accelerators

   Hint

   Think about what helps the concrete flow better.

4. 4.

   True or False: Accelerators slow down the curing process.

   • True
   • False

   Hint

   Consider the action of accelerators during hydration.

5. 5.

   A construction project requires concrete to set quickly due to an unexpected change in schedule. Which chemical admixture would you use and why?

   Hint

   Focus on the type of admixture that impacts setting speed.

6. 6.

   Evaluate how the introduction of shrinkage-reducing admixtures affects the cost and long-term durability of a high-rise building.

   Hint

   Consider both immediate and future cost implications.