2.4. Admixtures

Try these first

1. 1.

   What is an admixture?

   Hint

   Think about ingredients in food.

2. 2.

   Name one type of admixture.

   Hint

   These help with workability or setting time.

3. 3.

   What is the role of admixtures in concrete?

   • Modify properties
   • Increase weight
   • Decrease strength

   Hint

   Think about how you might adjust a recipe.

4. 4.

   True or False: Accelerators slow down the setting time of concrete.

   • True
   • False

   Hint

   Consider what you want to happen in colder weather.

5. 5.

   If you are constructing a large parking deck in summer, how might you use admixtures to ensure the concrete performs optimally?

   Hint

   Think about concrete temperature and working time.

6. 6.

   Consider a project where a quick turnaround is vital. What admixture would you prioritize and why?

   Hint

   Think about enhancing future work efficiency.