Practice Types Of Admixtures (10.1) - Workability of Fresh Concrete

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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 is mixed with concrete besides water and aggregates.
Question 2.
Name one type of admixture.
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Remember the list we discussed in class.
3Question 3.
What does a plasticizer do in concrete?
- Increases water content
- Improves workability
- Accelerates setting time
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Think about how they function in mixing.
4Question 4.
True or False: Retarders speed up the setting time of concrete.
- True
- False
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Focus on the purpose of retarders discussed in class.
Question 5.
You are tasked with preparing a large concrete structure in a hot climate. Which admixtures would you consider using and why?
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Think about the challenges posed by high temperatures.
Question 6.
Analyze the implications of using too much air-entraining agent in a mix. What effects might this have on the concrete?
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Consider the balance needed in concrete properties.

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