7.3.5. Specific Gravity and Water Absorption Test

Try these first

1. 1.

   What is the acceptable range for specific gravity in aggregates?

   Hint

   It's a range pertaining to density comparisons.

2. 2.

   What should water absorption preferably be less than?

   Hint

   Think of it as a percentage less than two.

3. 3.

   What is the typical range of specific gravity for aggregates?

   • 2.0-2.5
   • 2.6-2.9
   • 3.0-3.5

   Hint

   Remember it is slightly above 2.

4. 4.

   Is water absorption greater than 2% acceptable for aggregate efficacy?

   • True
   • False

   Hint

   Think of how water content impacts mix integrity.

5. 5.

   You are tasked with evaluating two aggregates for a construction project. Aggregate A has a specific gravity of 2.5 and water absorption of 3%, while Aggregate B has a specific gravity of 2.8 and water absorption of 1.8%. Which aggregate would you recommend and why?

   Hint

   Evaluate the implications of each aggregate’s properties.

6. 6.

   Design a scenario where you might encounter issues due to high levels of water absorption in the aggregates used during a rainy season on-site. Discuss the potential consequences.

   Hint

   Consider how aggregates interact with water during various weather conditions.