4.3 - Timing for Finishing Operations
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Practice Questions
Test your understanding with targeted questions
What type of vibrators work on the surface of the concrete?
💡 Hint: Think about the name and what they do.
Should surface vibrators be used on concrete with high workability?
💡 Hint: What does high workability refer to?
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Interactive Quizzes
Quick quizzes to reinforce your learning
Surface vibrators apply vibration to which part of the concrete?
💡 Hint: Consider where the vibration is initiated.
Is it advisable to use surface vibrators on concrete with a workability greater than 75 mm?
💡 Hint: Think about the effects of high workability on surface quality.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
You are in charge of a project using a concrete mix that has a workability of 80 mm. What should you recommend regarding the use of surface vibrators? Justify your answer.
💡 Hint: Reflect on the risks associated with high workability.
Consider a scenario where a large slab needs consolidation. If its thickness is 200 mm and heavily reinforced, discuss the implications of using surface vibrators versus internal vibrators; which would be more effective and why?
💡 Hint: Focus on the effectiveness based on thickness and reinforcement density.
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