Practice Metro And Tunnel Projects (4.11.2) - Chemical Admixtures

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6 sample questions

Question 1.
What is the main purpose of superplasticizers in concrete?
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Think about fluidity and strength.
Question 2.
Name one benefit of waterproofing admixtures.
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Consider the environment around tunnels.
3Question 3.
What is the main role of superplasticizers in concrete?
- To reduce setting time
- To increase strength
- To enhance workability and reduce water content
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Think about what makes concrete easier to work with.
4Question 4.
True or False: Waterproofing admixtures are unnecessary in tunnel construction.
- True
- False
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Consider the environmental conditions of tunnels.
Question 5.
Propose a solution for a construction scenario where the concrete for a metro tunnel has become too stiff to pump. What admixture would you recommend?
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Think of what can enhance fluidity.
Question 6.
If a tunnel's waterproofing admixtures failed and water began leaking, outline the steps you'd take to evaluate the damage and mitigate issues.
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Consider how to protect structural integrity and safety first.

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