5.2.1.5. Moisture Content

Try these first

1. 1.

   What is moisture content?

   Hint

   Think about the different forms of water present.

2. 2.

   Name one method used to determine moisture content in aggregates.

   Hint

   Consider methods that are commonly used in labs.

3. 3.

   What is moisture content in aggregates?

   • Only absorbed water
   • Total water present
   • Surface moisture only

   Hint

   Think about how water might be present in aggregates.

4. 4.

   True or False: The water-cement ratio has no influence on concrete strength.

   • True
   • False

   Hint

   Consider how water affects the chemical reactions in concrete.

5. 5.

   A construction project requires a water-cement ratio of 0.5. If 200 kg of cement are used, how much water is required if the moisture content of the aggregate is known to be 10%? Calculate adjusting the water as necessary based on the moisture content.

   Hint

   Remember to adjust the water quantity for the moisture already present in the aggregates.

6. 6.

   During a lab test, a sample weighs 150g in its wet state and weighs 140g after drying. Calculate the moisture content and discuss its implications for a concrete mix design.

   Hint

   Use the moisture content formula to calculate correctly.