7.1. Classification of Aggregates

Try these first

1. 1.

   What are natural aggregates?

   Hint

   Think about materials found in a river.

2. 2.

   What do we call aggregates that pass through a 75 µm sieve?

   Hint

   They're the finest particles in the size classification.

3. 3.

   What is the maximum size for coarse aggregates according to the IS sieve?

   • 2.36 mm
   • 4.75 mm
   • 20 mm

   Hint

   Consider the definition of coarse aggregates.

4. 4.

   True or False: Recycled aggregates come from new raw materials.

   • True
   • False

   Hint

   Think about the source of recycled materials.

5. 5.

   Evaluate how substituting coarse aggregates with fine aggregates might affect the compressive strength of concrete.

   Hint

   Consider how mixing different sizes influences the concrete matrix.

6. 6.

   Propose the benefits of utilizing recycled aggregates in pavement construction.

   Hint

   Think about the broader impacts of recycling on materials.