Practice Selection Of Admixtures – Practical Considerations (4.4)

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6 sample questions

Question 1.
What is an admixture in concrete?
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Think about what can change how concrete behaves.
Question 2.
Name one function of superplasticizers.
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How can we make concrete easier to work with?
3Question 3.
Which admixture is used to accelerate the setting time of concrete?
- Retarder
- Superplasticizer
- Accelerator
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Think about the word 'speed' in terms of setting time.
4Question 4.
True or False: Air-entraining agents are used to enhance the workability of concrete.
- True
- False
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What is the primary function of air-entraining agents?
Question 5.
A large concrete pour is scheduled for a bridge deck on a hot day. Discuss how you would choose admixtures to ensure quality.
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Think about how weather affects concrete behavior.
Question 6.
Explain how using superplasticizers can impact the durability of a high-rise structure's concrete.
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Consider how water content affects strength.

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