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15.1. Fly Ash
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Practice test
11 questions on this section. Wrong answers show you what to read again.
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Revision test
Mixed questions from across the chapter. Your answers get marked.
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Flashcard drill
2 cards from this lesson. Good the night before a test.
Try these first
- 1.
What is fly ash?
Hint
Think about its source.
- 2.
What range of substitution is recommended for fly ash?
Hint
Recall the impact on mix properties.
- 3.
What is the primary benefit of using fly ash in concrete?
- Increased heat generation
- Improved workability
- Higher cement price
Hint
Think about how it helps with mixing.
- 4.
The typical range for substituting fly ash in concrete is...
- 10-20%
- 15-35%
- 30-50%
Hint
Consider how much of cement can be replaced.
- 5.
Calculate the necessary fly ash amount if you have a 500 kg cement requirement and want to replace 20% with fly ash.
Hint
Remember to compute percentages!
- 6.
Discuss the implications of using too much fly ash in a concrete mix. What properties could be negatively affected?
Hint
Think about the balance needed in mix design.
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
1 more question 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