17.3.3. Water

Try these first

1. 1.

   What should be the pH level of water used in concrete mixes?

   Hint

   Recall the acceptable range for the best quality.

2. 2.

   What is potable water?

   Hint

   Think about what kind of water is safe to drink.

3. 3.

   What quality must water used in concrete meet?

   • Must be distilled
   • Must be potable
   • Must be boiled

   Hint

   Think about the difference between safe and unsafe water.

4. 4.

   True or False: Water with a pH level outside 6 to 8 can negatively impact concrete?

   • True
   • False

   Hint

   Consider what happens during concrete curing.

5. 5.

   You are tasked with preparing concrete for a new highway. During testing, you find the water source has a pH of 5.5 and contains chlorides. Propose solutions for ensuring the concrete quality.

   Hint

   What processes can help purify water?

6. 6.

   You have two water sources: Source A has pH 7 but contains sulfates, while Source B has pH 8 and is free from harmful impurities. Which source would you choose for mixing concrete and why?

   Hint

   Consider the long-term effects on concrete integrity.