4.3.2.4. CBR Laboratory Test

Try these first

1. 1.

   What does CBR stand for?

   Hint

   Think about what the test measures.

2. 2.

   Why is moisture control important in the CBR test?

   Hint

   Consider how wet soil behaves differently.

3. 3.

   What does a higher CBR value indicate?

   • Weaker soil
   • Stronger soil
   • No impact on soil

   Hint

   Recall what CBR measures.

4. 4.

   True or False: The CBR test requires uncontrolled moisture conditions.

   • True
   • False

   Hint

   Think about the factors affecting test results.

5. 5.

   A project site has a CBR value of 15%. If you are tasked to propose improvements to the subgrade, what recommendations would you suggest and why?

   Hint

   Think about the techniques covered that boost subgrade strength.

6. 6.

   Given a scenario where the moisture content exceeds the optimum level during a CBR test, how would you expect the results to be affected, and what could be done to correct the issue?

   Hint

   Remember the significance of moisture in test integrity.