Practice Rheology Of Fresh Concrete (11) - Workability of Fresh Concrete

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is rheology?
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Think about materials and their movement.
Question 2.
Define yield stress.
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It's about starting the flow.
3Question 3.
What is the definition of yield stress?
- A. The maximum stress before failure
- B. The stress required to initiate flow
- C. The stress during setting
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It's the point at which concrete starts to move.
4Question 4.
Is thixotropy a permanent change in viscosity?
- True
- False
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Consider whether it can change back.
Question 5.
A construction team is struggling to pump a concrete mix with a yield stress too high. Discuss how they can modify the mix design to improve its flow.
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Think about additives and the composition of the mix.
Question 6.
Analyze how temperature might influence the rheological properties of a fresh concrete mix during a hot day.
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Consider how heat impacts viscosity and yield stress levels.

4 more questions in this section. Enroll free to practise them all.