Practice Admixtures (16.2.4) - Cement Concrete for Pavement Construction

Practice: Admixtures

Lesson 16.2.4Cement Concrete for Pavement Construction

Practise this section

9 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is an admixture in concrete?
Show hintHide hint
Think about why we might need to improve concrete.
Question 2.
Name one type of admixture.
Show hintHide hint
Consider the functions they serve.
3Question 3.
What is the purpose of water reducers in concrete?
- To add more water
- To improve workability
- To slow down setting time
Show hintHide hint
They allow concrete to flow better.
4Question 4.
True or False: Air-entraining agents increase the risk of freeze-thaw damage.
- True
- False
Show hintHide hint
Think about the protective role of air pockets.
Question 5.
Consider a new project in a region with extreme cold. You are responsible for selecting admixtures to use in the concrete mix. Which admixtures would you choose and why?
Show hintHide hint
Think about the environmental conditions and how they affect concrete.
Question 6.
You're presented with a case where concrete is setting too quickly during a summer project, leading to cracking issues. Identify which admixture can be added to alleviate this problem and provide a rationale.
Show hintHide hint
Recall the properties of retarders.

5 more questions in this section. Enroll free to practise them all.