3.8.2. Subbase and Base Course

Try these first

1. 1.

   What is the purpose of the subbase in pavement construction?

   Hint

   Think about the layer under the base course.

2. 2.

   How does compaction affect the durability of pavement?

   Hint

   Consider what happens to air voids in the soil.

3. 3.

   What is the primary purpose of compaction in the subbase and base course?

   • To reduce costs
   • To ensure load distribution
   • To enhance color

   Hint

   Think about why reducing air in the soil is important.

4. 4.

   True or False: A properly compacted subbase will help mitigate future pavement cracking.

   • True
   • False

   Hint

   Recall how stability is achieved.

5. 5.

   Design a small pavement section and describe how you would ensure proper compaction of the subbase and base layers.

   Hint

   Think about the tools and techniques you would use.

6. 6.

   You observe pavement distress in a recently constructed road with inadequate compaction. Analyze the contributing factors and propose a plan for remediation.

   Hint

   Consider both the causes and solutions to address the issue.