13.5.1. Marshall Mix Design Method

Try these first

1. 1.

   What is the purpose of the Marshall Mix Design Method?

   Hint

   Think about the factors involved in pavement construction.

2. 2.

   What is meant by the term 'stability' in the context of the Marshall method?

   Hint

   Consider what happens to roads under heavy vehicles.

3. 3.

   What is the minimum stability requirement for Marshall Mix according to IRC: SP: 53-2010?

   • 5 kN
   • 7 kN
   • 9 kN
   • 10 kN

   Hint

   Revisit the stability criteria we discussed earlier.

4. 4.

   True or False: Flow values in Marshall Mix Design should fall between 4-6 mm.

   • True
   • False

   Hint

   Think back to the specified ranges discussed.

5. 5.

   Given different percentages of bitumen from 4% to 6%, calculate the amount of bitumen needed for 1000 kg of aggregate for each percentage. Which percentage results in the heaviest mix when aggregates are accounted for?

   Hint

   Remember to calculate based on total aggregate weight.

6. 6.

   Analyze a scenario where a specific blend fails the stability test but meets the flow test. What adjustments could be suggested in the design process to improve stability?

   Hint

   Think about the relationship between binder content, aggregate size, and overall mix robustness.