16.4.2. Sub-base

Try these first

1. 1.

   What is the typical thickness range of a sub-base?

   Hint

   Think about the units typically used in construction.

2. 2.

   Which materials may be used for a sub-base?

   Hint

   Consider materials that provide good support and drainage.

3. 3.

   What is the primary purpose of the sub-base in pavement construction?

   • A) Aesthetic reasons
   • B) Load transfer and support
   • C) Surface finishing

   Hint

   Think about the structural role of the sub-base.

4. 4.

   The typical thickness of a sub-base can range from __ mm to __ mm.

   Hint

   Recall the numbers we discussed in class.

5. 5.

   A construction project requires a sub-base thickness of 125 mm over a 200 m² area. Calculate the total volume of material needed. How might insufficient thickness affect the pavement?

   Hint

   Be careful with unit conversions!

6. 6.

   Evaluate the impact of using granular material versus lean concrete for a heavy traffic road. What considerations should be made?

   Hint

   Think about the specific needs of high traffic scenarios.