Practice Issue: Strength Too Low (20.3) - Objectives of Mix Design - Civil Engineering Materials, Testing & Evaluation - Vol 2

Practice: Issue: Strength too low

Lesson 20.3Objectives of Mix Design

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8 questions

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6 sample questions

Question 1.
What does a high water-cement ratio lead to in concrete strength?
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Think about the relationship between water and cement.
Question 2.
Which factor is important to check when mixing concrete?
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Consider how precise measurements affect the mix.
3Question 3.
What is a major cause of low concrete strength?
- Excess cement
- High water-cement ratio
- Correct batching
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Think about the effect of too much water.
4Question 4.
True or False: Accurate batching is critical for achieving the desired concrete strength.
- True
- False
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Remember why precise measurements are needed.
Question 5.
You tested a concrete mix and found it only reaches 18 MPa strength, below your target of 25 MPa. List three ways you would adjust your mix.
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Think about what is missing or too high in your mix.
Question 6.
During a slump test, you found the concrete mix was too stiff. What steps can you take to improve its workability?
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Workability means how easy it is to pour and shape the concrete.

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