Enrol to start learning
Reading is open to everyone. Enrolling is free, and it is what unlocks the audio lessons, practice tests and progress tracking.
7. Role of Admixtures in Controlling Fresh Concrete Behavior
This section
Practice test
12 questions on this section. Wrong answers show you what to read again.
Sign up to take itWhole chapter
Revision test
Mixed questions from across the chapter. Your answers get marked.
Sign up to take itQuick
Flashcard drill
4 cards from this lesson. Good the night before a test.
Try these first
- 1.
What do plasticizers do in concrete?
Hint
Think of easier mixing and placement.
- 2.
Name one benefit of air-entraining agents.
Hint
Consider weather-related durability.
- 3.
What is the main purpose of plasticizers?
- Increase water content
- Enhance workability
- Reduce setting time
Hint
Think about how we achieve better consistency.
- 4.
Air-entraining agents are primarily used to __________.
- True
- False
Hint
Consider protection from weather effects.
- 5.
Evaluate the impact of excessive use of retarders on the strength development of concrete over time.
Hint
Consider the balance between working time and strength.
- 6.
Formulate a mix design for hot weather utilizing various admixtures including retarders and air-entraining agents.
Hint
Think about ratio adjustments for weather conditions.
Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
4 more questions available
Enrol freeQuiz
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
2 more questions available
Enrol freeChallenge Problems
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting