Practice Effects Of Admixtures On Fresh And Hardened Concrete Properties (4.5)

Practice: Effects of Admixtures on Fresh and Hardened Concrete Properties

Lesson 4.5Cement

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 the main function of plasticizers in concrete?
Show hintHide hint
Think about how plasticizers affect flow.
Question 2.
Name one type of admixture that slows down setting time.
Show hintHide hint
Consider conditions where slow setting might be needed.
3Question 3.
Which of the following admixtures increases workability without extra water?
- Plasticizers
- Accelerators
- Retarders
Show hintHide hint
Think about the role of each admixture.
4Question 4.
True or False: Superplasticizers can reduce the water content while maintaining high workability.
- True
- False
Show hintHide hint
Consider their effectiveness compared to other admixtures.
Question 5.
Given a scenario where concrete is to be poured in high-temperature conditions, what admixtures would you recommend and why? Discuss their impact on the final properties.
Show hintHide hint
Consider how temperature affects the concrete curing process.
Question 6.
A project requires concrete that will be subjected to severe freeze-thaw conditions. Which admixtures should be included in the mix design and why?
Show hintHide hint
Think about the role of air in concrete when subjected to temperature changes.

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