Practice Duration Of Mixing (1.3) - Mixing of Concrete - Civil Engineering Materials, Testing & Evaluation - Vol 1

Practice: Duration of Mixing

Lesson 1.3Mixing of Concrete

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9 questions

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2 cards from this section. Quick, good the night before a test.
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6 sample questions

Question 1.
What is the typical duration for machine mixing of concrete?
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Consider what is commonly recommended for other mixing processes.
Question 2.
What does over-mixing cause?
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Think about what happens when components separate.
3Question 3.
What is the optimal mixing duration for machine mixing concrete?
- 1 minute
- 1.5 to 2 minutes
- 3 minutes
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Consider what is typically stated in standards for concrete mixing.
4Question 4.
True or False: Over-mixing is beneficial for concrete workability.
- True
- False
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Reflect on the effects of mixing time discussed earlier.
Question 5.
During a construction project, the team mixed concrete for 2.5 minutes. Describe the potential quality issues they may face and propose solutions.
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Consider what mixing time is prescribed and what happens with improper practice.
Question 6.
If a survey reveals a pattern of frequent over-mixing in a company's projects, what steps would you recommend to correct this behavior?
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Focus on the balance between education and enforcement.

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