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2 cards from this section. Quick, good the night before a test.
What do surface vibrators do?
Think about where the vibration is applied.
Name one application of vibrating tables.
Consider where you might see vibrating tables.
Which type of vibrator is more effective for consolidation?
Consider which vibrator provides a more direct effect.
Is it advisable to use surface vibrators for concrete with high workability?
Recall the key issues regarding workability.
You are tasked with consolidating a 200mm thick reinforced concrete slab, using the appropriate vibrators. Which type of vibrators would you select and why? Discuss the limitations of the alternative.
Think about the thickness limitations of each type of vibrator.
If you are using a vibrating table for stiff concrete that has a frequency of 5,000 vibrations per minute, what amplitude setting would you recommend for optimal results? Justify your recommendation.
Recall the guidelines for amplitude and frequency settings based on concrete consistency.
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