6.2. Effects of Impurities in Water

Try these first

1. 1.

   Name one impurity that delays the setting time of concrete.

   Hint

   Think about what could interfere with the hydration process.

2. 2.

   What can excessive chlorides in water lead to?

   Hint

   Consider what happens to metal in salty water.

3. 3.

   Which of the following substances can delay concrete setting?

   • Chlorides
   • Sugars
   • Acids

   Hint

   Think about what can disrupt the hardening process.

4. 4.

   True or False: Acids can cause concrete to set too quickly.

   • True
   • False

   Hint

   Consider rapid versus slow setting.

5. 5.

   You are tasked with testing a water source for a large construction project. Water samples show high organic content and moderate chlorides. Discuss your plan for addressing these impurities.

   Hint

   Consider methods for treating water and ensure compliance with standards.

6. 6.

   An analysis reveals that concrete used in a coastal project has been subjected to high chloride levels. Propose a method to improve the durability of the structure against corrosion.

   Hint

   Think about alternative materials and protective measures.