Practice Admixtures (if Any) (3.9) - Objectives of Mix Design - Civil Engineering Materials, Testing & Evaluation - Vol 2

Practice: Admixtures (if any)

Lesson 3.9Objectives of Mix Design

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What are admixtures in concrete?
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Think about what additives do to a mixture.
Question 2.
Name one type of admixture.
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Consider which admixture enhances workability first.
3Question 3.
What is the primary purpose of admixtures in concrete?
- To increase water content
- To enhance concrete properties
- To reduce strength
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Think about what additives are for in mixtures.
4Question 4.
True or False: Superplasticizers decrease workability in concrete.
- True
- False
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Consider how superplasticizers function within a mix.
Question 5.
You are designing a mix for a high-performance concrete structure. Which admixture would you choose and why? Consider environmental factors in your decision.
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Focus on the properties required for high-performance applications.
Question 6.
A contractor reported issues with achieving required workability despite high water content. Suggest potential remedies using admixtures.
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Consider the benefits of reducing water content relative to workability.

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