Practice Types Of Admixtures (4.1) - Cement - Civil Engineering Materials, Testing & Evaluation

Practise this section

9 questions

Flashcard drill
4 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 purpose of an admixture?
Show hintHide hint
Think about why additives are used in mixtures.
Question 2.
Name one type of admixture.
Show hintHide hint
Look at the roles each plays.
3Question 3.
What is the function of superplasticizers in concrete?
- To delay setting time
- To increase workability and strength
- To reduce water requirement
- To introduce air bubbles
Show hintHide hint
Think about how they differ from regular plasticizers.
4Question 4.
True or False: Retarders are used to speed up the setting time of concrete.
- True
- False
Show hintHide hint
Remember the effects of temperature on concrete setting.
Question 5.
Considering a construction project in a very humid environment, which admixtures would be prioritized for ensuring optimal performance and why?
Show hintHide hint
Reflect on the properties of concrete under varying humidity.
Question 6.
Explain how the use of silica fume would be advantageous in a project requiring high early strength concrete.
Show hintHide hint
Think about how particle size and material characteristics contribute to performance.

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