3.4. Methods of Combining Aggregates

Try these first

1. 1.

   What is a Gradation Curve?

   Hint

   Think of how we can visually show size distribution.

2. 2.

   Define Fuller's Formula.

   Hint

   Remember it involves the maximum size and a specific aggregate size.

3. 3.

   What does the Trial and Error Method involve?

   • Calculating percentages
   • Plotting gradation curves
   • Using random aggregates

   Hint

   Think about the exploratory nature of the method.

4. 4.

   True or False: Fuller's Formula applies only to the Trial and Error Method.

   • True
   • False

   Hint

   Consider how each method functions.

5. 5.

   Given different aggregate sizes, use the trial and error method to propose a potential combination that maximizes strength while maintaining workability.

   Hint

   Consider performance requirements.

6. 6.

   Using Fuller's Formula, if the maximum aggregate size is increased to 40mm, how does that impact the percentages calculated for smaller sizes? Provide computations.

   Hint

   Look at how the maximum size affects the outcome.