2.1. Classification of Aggregates

Try these first

1. 1.

   What are fine aggregates?

   Hint

   Think of common beach sand.

2. 2.

   Give an example of coarse aggregates.

   Hint

   What do you put in the concrete mix to provide bulk?

3. 3.

   What size particles make up fine aggregates?

   • Larger than 4.75 mm
   • Smaller than 4.75 mm
   • Between 5 mm and 10 mm

   Hint

   Think of beach sand.

4. 4.

   True or False: Coarse aggregates are smaller than fine aggregates.

   • True
   • False

   Hint

   Remember the sieve sizes.

5. 5.

   Calculate the ideal aggregate mix for a small concrete slab. You want to use a total of 0.5 cubic meters of concrete. Include specific percentages for fine, coarse, and recycled aggregates.

   Hint

   Start by referring to the typical ratios based on your requirements.

6. 6.

   Discuss the advantages and disadvantages of using recycled aggregates in concrete mixes worried about strength and durability.

   Hint

   Consider both short-term and long-term project goals.