Unit 6 & 7

Question 1

Name and describe the two types of pavement treatment.

Answer 1

1. Conventional treatment
2. Geotechnical issues

Question 2

Name the 6 types of roadbed problem areas.

Answer 2

1. Undermined ground
2. Dolomitic foundations
3. Heaving or expansive clays
4. Dispersive soils
5. Collapsible soils
6. Made ground and landfills

Question 3

Name the 13 types of pavement defects and failures.

Answer 3

1. Alligator cracking
2. Block cracking
3. Longitudinal cracking
4. Transverse cracking
5. Edge cracks
6. Joint reflection cracks
7. Slippage cracks
8. Potholes
9. Depressions
10. Rutting
11. Shoving
12. Upheaval
13. Ravelling

Question 4

Name and describe the types of pavement maintenance (3).

Answer 4

1. Routine Maintenance - it is about keeping the pavement in good condition by addressing minor issues.
2. Periodic Maintenance - is more extensive and it aims to correct significant wear and restore pavement condition over time e.g. annually.
3. Urgent Maintenance - Urgent Maintenance comprises emergency repair required by flood damage, earth slips, overturned trees, etc.