26.4. Determine Marshall stability and flow

Try these first

1. 1.

   What is Marshall Stability?

   Hint

   Think about the load a pavement can bear.

2. 2.

   How is Marshall Flow measured?

   Hint

   Consider how much the material changes shape under load.

3. 3.

   What is the Marshall stability of a specimen?

   • Maximum load before plastic deformation
   • Minimum load to cause failure
   • The load at which flow is recorded

   Hint

   Think about what stability means in engineering contexts.

4. 4.

   True or False: A higher flow value is always better for asphalt mixtures.

   • True
   • False

   Hint

   What happens if a material is too soft?

5. 5.

   Given an asphalt mixture with a stability of 600 kg and flow value of 12 mm, analyze if it meets the standard for high-performance pavements.

   Hint

   Refer to the standard specifications for flow values.

6. 6.

   If you adjust the bitumen content in a mix and observe an increase in both stability and flow, discuss the potential implications for pavement longevity.

   Hint

   Consider the stability-flow balance in asphalt mixtures.