Unit 1 & 2

Question 1

What is pavement design and what is the basic objective?

Answer 1

The design and construction of road surfaces. The basic objective is to combine materials of sufficient strength in a layered system to provide desired functional and structural service life.

Question 2

Complete the table differentiating the types of pavements.

Answer 2

See notes

Question 3

State the factors of economic viability (4).

Answer 3

1. Functional and service levels
2. Deterioration rates
3. Costs associated with provision and maintenance
4. Savings by road users resulting from improved levels

Question 4

The ability of a pavement to provide acceptable functional and structural levels is referred to as the “supply”. Name the 3 “demand” factors.

Answer 4

1. Traffic environment
2. Natural environment
3. Population environment

Question 5

State the difference between structural stress, terminal structural condition and structural failure.

Answer 5

• Structural stress - occurs from the day the pavement is open to traffic. Stars small until permanent deformation and fatigue.

• Terminal structural condition - it is reached when the level of distress reaches a predefined unacceptable level.

• Structural failure - occurs if the pavement layer loses its strength.

Question 6

Complete the table differentiating functional capacity and structural capacity

Answer 6

See notes