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4 cards from this section. Quick, good the night before a test.
What is the maximum workability limit for using surface vibrators?
Think about how high the concrete can be before problems occur.
What do surface vibrators primarily help to eliminate?
What happens when air is trapped in concrete?
What is the role of surface vibrators in concrete?
Think about what happens when you shake a liquid.
True or False: Surface vibrators can be used for concrete with workability levels exceeding 75 mm.
What is the maximum workability allowed?
You are designing a concrete slab with a thickness of 120 mm. Discuss whether you would use a surface vibrator or needle vibrator, and justify your reason.
Consider the thickness limitation introduced earlier.
A project requires consolidation of a very dry concrete mix. Discuss how you would set the vibration amplitude and frequency for effective consolidation.
Think about how the consistency of the mix relates to vibration needs.
6 more questions in this section. Enroll free to practise them all.
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