Practice Contact Pressure (20.2.1) - Factors affecting pavement design

Practice: Contact Pressure

Lesson 20.2.1Factors affecting pavement design

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8 questions

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6 sample questions

Question 1.
What is contact pressure?
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Think about pressure and the connection between the tire and pavement.
Question 2.
Why is wheel load important in pavement design?
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Consider the weight that the pavement must support.
3Question 3.
What is the main influence of contact pressure on pavement design?
- It affects asphalt viscosity.
- It determines the stress distribution of the pavement.
- It has no effect on design.
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Consider the relationship between weight and pavement longevity.
4Question 4.
True or False: Moving loads at higher speeds cause more pavement damage than at lower speeds.
- True
- False
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Think about stress distribution related to speed.
Question 5.
A vehicle with a single axle carrying a weight of 40 kN has a tire pressure of 200 kPa. Calculate the contact area and discuss how this could impact pavement design preferences.
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Use the contact pressure formula to find the area.
Question 6.
Consider a road designed for heavy truck traffic with regular speeds of 20 km/hr. Discuss how this design might change if the trucks were moving at just 5 km/hr.
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Reflect on how speed changes affect load impacts.

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