2.3. Water

Try these first

1. 1.

   What is potable water?

   Hint

   Think about what type of water you drink.

2. 2.

   Why is the water-cement ratio important?

   Hint

   Consider how different mixtures change concrete properties.

3. 3.

   What qualifies as potable water for RMC production?

   • Water from a river
   • Tap water
   • Water with contaminants

   Hint

   Consider the sources of drinking water.

4. 4.

   True or False: The water-cement ratio can be adjusted as needed without consequence.

   • True
   • False

   Hint

   Reflect on how mixtures work in concrete.

5. 5.

   A construction site receives a water delivery that has not been tested. What steps should be taken to ensure the water is safe for use in RMC?

   Hint

   Think about what professionals check for in construction.

6. 6.

   If a project specifies a water-cement ratio of 0.45 for a concrete mix, how much water is needed for 200 kg of cement?

   Hint

   Apply the formula for water-cement ratio to solve.