4.4. Interpretation of Soil Strength Parameters for Pavement Design

Try these first

1. 1.

   What does a higher CBR value indicate about pavement thickness?

   Hint

   Think about the soil's bearing capacity.

2. 2.

   Define the resilient modulus.

   Hint

   Remember it relates to traffic loads.

3. 3.

   What does a higher CBR percentage imply for pavement thickness?

   • Thicker pavement is needed
   • Thinner pavement can be used
   • CBR has no effect

   Hint

   Remember 'Higher CBR, Thinner Pavement'.

4. 4.

   True or False: Resilient Modulus (MR) can be estimated from CBR values.

   • True
   • False

   Hint

   Think of the relationship between CBR and MR in design.

5. 5.

   Given a soil sample with a CBR of 20%, calculate the approximate Resilient Modulus (MR). What would this imply for pavement design?

   Hint

   Remember the relationship between MR and CBR.

6. 6.

   Discuss the impact of seasonal changes on UCS and suggest methods to mitigate these effects in pavement design.

   Hint

   Consider how water management is critical for soil stabilization.