3.1.1. Based on Size

Try these first

1. 1.

   What size qualifies as fine aggregates?

   Hint

   Think about the maximum size.

2. 2.

   Name one example of coarse aggregates.

   Hint

   Consider commonly used materials in concrete.

3. 3.

   What defines fine aggregates?

   • Greater than 4.75 mm
   • Less than 4.75 mm
   • Exactly 4.75 mm

   Hint

   Remember the sieve test for these aggregates.

4. 4.

   True or False: Coarse aggregates help with the compressive strength of concrete.

   • True
   • False

   Hint

   Think about the structural role of aggregates.

5. 5.

   Given a concrete mix that requires 600 kg of aggregates with a 75:25 ratio of coarse to fine aggregates, how much of each type should be used?

   Hint

   Apply the ratio to the total weight.

6. 6.

   Critically analyze a situation where using all-in aggregates might be preferred over separate fine and coarse aggregates.

   Hint

   Consider the impact of efficiency on project timelines.