6.3.4. Oils and Greases

Try these first

1. 1.

   What are two sources of oils and greases in construction?

   Hint

   Think about equipment and factory environments.

2. 2.

   What does workability refer to?

   Hint

   It relates to how the concrete behaves during placement.

3. 3.

   What can oils and greases do to concrete?

   • Improve bonding
   • Hinder bonding
   • Have no effect

   Hint

   Consider their properties and interaction with materials.

4. 4.

   True or False: Oils and greases enhance the workability of concrete.

   • True
   • False

   Hint

   Think about how they interact with the concrete mix.

5. 5.

   A construction project uses water from a local pond for concrete. The water has a palpable oil sheen. Discuss the possible risks and how would you manage this situation?

   Hint

   Identify the contamination and determine the next steps.

6. 6.

   Design a quality control plan for a project that frequently changes water sources due to location. What factors must be included?

   Hint

   Consider variability in locations and contamination risks.