5.2.1.3. Specific Gravity

Try these first

1. 1.

   What is specific gravity?

   Hint

   Think about how to compare weight with something.

2. 2.

   What is the normal specific gravity range for aggregates?

   Hint

   Refer to the values mentioned during the lesson.

3. 3.

   What does specific gravity measure?

   • The density of aggregate
   • The water absorption of aggregate
   • The ratio of aggregate weight to water weight

   Hint

   Consider the definition of specific gravity.

4. 4.

   True or False: Bulk specific gravity includes water in the pores of the aggregate.

   • True
   • False

   Hint

   Reflect on what 'bulk' means.

5. 5.

   You have two types of aggregates for a concrete mix: Aggregate A has a specific gravity of 2.5, and Aggregate B has a specific gravity of 3.0. If you need a mix that utilizes both while optimizing mix strength, how would you choose the proportions?

   Hint

   Reflect on how specific gravity relates to strength.

6. 6.

   A project requires concrete with a specific gravity close to 2.7. You have aggregates with specific gravities of 2.3, 2.4, 2.6, and 2.9. How would you proceed to create the required concrete mix?

   Hint

   Think about how mixing aggregates impacts the outcome.