21.3. Summary

Try these first

1. 1.

   What is subgrade soil?

   Hint

   Refer to how subgrade contributes to pavement.

2. 2.

   What does the CBR test measure?

   Hint

   Think about how we assess soil strength.

3. 3.

   What is the purpose of the CBR test?

   • To measure moisture content in soil
   • To evaluate the strength of subgrade soil
   • To assess the temperature of pavement materials

   Hint

   Think about what characteristics of soil are measured.

4. 4.

   The Plate Load test is used to determine the:

   • True
   • False

   Hint

   Consider what happens to the soil under load.

5. 5.

   Design a pavement structure considering a subgrade soil with a CBR value of 3%. What thickness of pavement would you recommend to ensure durability?

   Hint

   Refer to engineering guidelines that correlate CBR values with pavement thickness.

6. 6.

   Evaluate how seasonal changes might affect the results of the Plate Load Test conducted on clayey soil.

   Hint

   Consider the physical properties of clay and how moisture impacts them.