3.8.1. Subgrade Compaction

Try these first

1. 1.

   What is the minimum compaction percentage required for subgrade?

   Hint

   Recall the key values discussed regarding compaction level.

2. 2.

   Name one method of achieving subgrade compaction.

   Hint

   Think about the tools mentioned in relation to soil types.

3. 3.

   What is the minimum compaction percentage for subgrade?

   • 85-90%
   • 90-95%
   • 95-100%

   Hint

   Think about the standards discussed for subgrade.

4. 4.

   True or False: Poor compaction may lead to increased maintenance costs.

   • True
   • False

   Hint

   Consider the long-term effects of inadequate compaction.

5. 5.

   A newly constructed pavement shows signs of cracking after the first winter. Investigate potential factors that could lead to this issue, considering subgrade compaction.

   Hint

   Reflect on the importance of compacting to the right level.

6. 6.

   You've been tasked to design a new roadway that requires heavy load capacity. Discuss the subgrade compaction methods you would recommend and justify your choices.

   Hint

   Consider the characteristics of the soil you are working with.