2.3. Aggregates

Try these first

1. 1.

   Define coarse aggregates.

   Hint

   Think about the size of the aggregates.

2. 2.

   What is an example of fine aggregate?

   Hint

   Consider smaller particles used in concrete.

3. 3.

   What are coarse aggregates?

   • A type of fine aggregate
   • Gravel or crushed stone larger than 4.75 mm
   • Sand used in concrete

   Hint

   Remember the size classification.

4. 4.

   True or False: Cleanliness of aggregates affects the strength of concrete.

   • True
   • False

   Hint

   Think about the effects of contaminants.

5. 5.

   Design a concrete mix and choose suitable aggregates keeping in mind the durability required for a bridge construction in a coastal area.

   Hint

   Consider environmental factors that may affect material choices.

6. 6.

   Analyze how using angular versus rounded aggregates would change your concrete's compressive strength in a high-rise building.

   Hint

   Think about the geometry of the particles when mixed.