17.1. Requirements of Concrete for Pavement Applications

Try these first

1. 1.

   What is the typical compressive strength range for concrete used in highways?

   Hint

   Think about the load that highways need to withstand.

2. 2.

   Define workability in the context of concrete.

   Hint

   Consider the handling of concrete before it sets.

3. 3.

   What is the typical range for flexural strength of pavement concrete?

   • 2 MPa to 3 MPa
   • 4 MPa to 5 MPa
   • 6 MPa to 7 MPa

   Hint

   Think about what strength is necessary for bending.

4. 4.

   True or False: Durability is defined as the economic efficiency of the mix design.

   • True
   • False

   Hint

   Focus on what durability relates to in terms of environmental exposure.

5. 5.

   A major highway is experiencing increased traffic load leading to pavement cracking. Determine the required adjustments to compressive and flexural strengths needed to fortify the pavement for extended service life.

   Hint

   Refer back to load requirements and typical strength values.

6. 6.

   Assume a concrete mix is designed but fails to consider adequate shrinkage and creep resistance. Write a short report discussing potential long-term impacts and proposed revisions.

   Hint

   Think about what uncontrolled deformation means for large-scale infrastructure.