Practice Requirements For Pumpable Concrete (13.2) - Workability of Fresh Concrete

Practice: Requirements for Pumpable Concrete

Lesson 13.2Workability of Fresh Concrete

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9 questions

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6 sample questions

Question 1.
What is meant by the term 'cohesiveness' in concrete?
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Think about what keeps everything sticky.
Question 2.
Why is the mortar fraction important for pumpable concrete?
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It's like a lubricant for a machine.
3Question 3.
Which of the following is a key requirement for pumpable concrete?
- High water-cement ratio
- Well-graded aggregates
- Large aggregate size
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Think about how particles fit together.
4Question 4.
True or False: Cohesiveness in concrete helps prevent segregation during pumping.
- True
- False
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Consider the definition of cohesiveness.
Question 5.
You are in charge of a large construction project requiring pumpable concrete. The aggregates delivered to your site are not well-graded. Explain the potential issues this may create during pumping and provide mitigation strategies.
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How can mixing improve flow?
Question 6.
Design a concrete mix for a specific project where long-distance pumping is necessary. Detail at least three enhancements you would include to ensure the mix is highly pumpable.
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Think about strategies to reduce friction and blockages.

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