5.2.1.4. Water Absorption

Try these first

1. 1.

   What does water absorption indicate in aggregates?

   Hint

   Think about the relationship between aggregates and water.

2. 2.

   How is the percentage of water absorption calculated?

   Hint

   Consider dry and soaked weights.

3. 3.

   What is the formula for calculating water absorption percentage?

   Hint

   Remember to focus on the weights before and after soaking.

4. 4.

   True or False: A high water absorption indicates low porosity in aggregates.

   • True
   • False

   Hint

   Consider what porosity means for water retention.

5. 5.

   Aggregate A has a dry weight of 150 kg and a soaked weight of 165 kg. Calculate the water absorption percentage and discuss its implications for concrete mix design.

   Hint

   Remember the formula for water absorption.

6. 6.

   You are using aggregate with a water absorption of 8%. If the concrete mix design specifies a water-cement ratio of 0.5, how would you determine the necessary water content to achieve proper workability?

   Hint

   Think about how identifying the total water requirement is essential for concrete consistency.