7.3.1. Crushing Test

Try these first

1. 1.

   What is the purpose of the Crushing Test?

   Hint

   Think about how this relates to road construction.

2. 2.

   What is the acceptable crushing value for aggregates used in pavements?

   Hint

   Remember the threshold for suitability.

3. 3.

   What is the maximum aggregate crushing value for suitability in pavement layers?

   • 10%
   • 30%
   • 50%

   Hint

   Remember the threshold discussed.

4. 4.

   True or False: Aggregates with a crushing value greater than 30% are acceptable for use as surface courses.

   • True
   • False

   Hint

   Think of the limits we discussed.

5. 5.

   You have a sample aggregate that weighs 1200g. After the crushing test, the weight of the material passing the 2.36 mm sieve is 360g. Calculate the aggregate crushing value and determine if the sample meets standards for use.

   Hint

   Use the formula: ACV = (passing weight / original weight) x 100.

6. 6.

   You want to compare two different aggregates for use in surface courses. Aggregate A has a crushing value of 28% and Aggregate B has a crushing value of 32%. Discuss which aggregate is more suitable for use.

   Hint

   Remember the acceptable limits for pavements.