25.7. Problems

Try these first

1. 1.

   What are the three categories of aggregates?

   Hint

   Think about the types used in construction.

2. 2.

   What is the primary purpose of fillers in a dry mix?

   Hint

   Consider how they interact with other aggregates.

3. 3.

   What is the benefit of using coarse aggregates in a mix?

   • A) They fill voids
   • B) They enhance stability
   • C) They reduce drainage

   Hint

   Remember their primary function in the mix.

4. 4.

   True or False: Fine aggregates are crucial for reducing air spaces in the mixture.

   • True
   • False

   Hint

   Think about how spaces are filled in the mix.

5. 5.

   Given a maximum particle size of 12.5 mm, design a gradation curve using Fuller's law for a dry mix.

   Hint

   Consider how n affects the curvature of the gradation.

6. 6.

   Apply the trial-and-error method to find suitable proportions of three aggregates to achieve specified gradation limits.

   Hint

   Document each attempt to track adjustments.