Practice Case Example: Design Of M40 Concrete For Highway Pavement (17.10) - Design of Concrete Mix for Pavements

Practice: Case Example: Design of M40 Concrete for Highway Pavement

Lesson 17.10Design of Concrete Mix for Pavements

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9 questions

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6 sample questions

Question 1.
What is the formula to calculate the target flexural strength?
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Think about how we adjust the characteristic strength.
Question 2.
What is the maximum size of aggregates used for M40 concrete?
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Refer back to the design parameters.
3Question 3.
What is the target flexural strength calculated for M40 concrete?
- 4.5 MPa
- 5.49 MPa
- 6 MPa
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Remember the formula for calculating target strength.
4Question 4.
True or False: A lower water-cement ratio improves the workability of concrete.
- True
- False
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Consider the balance required for both workability and strength.
Question 5.
A new specification requires increasing the target flexural strength to 5.5 MPa due to higher environmental demands. How would you adjust the water-cement ratio to achieve this considering the original ratio was 0.38?
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Consider how to maintain the balance between strength and shrinkage.
Question 6.
If upon testing, your actual flexural strength of a trial mix only reached 3.8 MPa, what remedial actions could you take in future designs?
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Reflect on improving the mix design adjustments.

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