Practice Use Of Admixtures In Fresh Concrete (11)

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9 questions

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6 sample questions

Question 1.
What is an admixture?
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Think about what we change in the concrete.
Question 2.
Name one type of admixture that improves workability.
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It has 'plastic' in its name.
3Question 3.
What is the primary purpose of a plasticizer?
- A. Increase water content
- B. Improve workability
- C. Speed up curing
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Think of what plasticizers do.
4Question 4.
True or False: Retarders are used to speed up the setting of concrete.
- True
- False
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Consider if they make setting faster or slower.
Question 5.
You are advising a contractor on a concrete mix for a large outdoor project in a hot climate. What admixtures would you recommend? Justify your choices.
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Consider the impacts of heat on setting and how admixtures can counteract that.
Question 6.
A construction project is facing delays due to cold weather. What specific admixture could aid in accelerating concrete strength and why is it important?
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Think about why quick setting could benefit a construction timeline during winter.

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