Practice Effect On Strength (6.2.2) - Water – Requirements and Impurities

Practice: Effect on Strength

Lesson 6.2.2Water – Requirements and Impurities

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9 questions

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6 sample questions

Question 1.
What happens when chlorides are present in water used for concrete?
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Think about how chlorides interact with steel.
Question 2.
What are sulphates known to do in concrete?
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Consider their effect on the cement's reaction.
3Question 3.
What type of impurities can severely affect the strength of concrete?
- Chlorides
- Sulfates
- Both A and B
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Consider the impact of both on hydration.
4Question 4.
True or False: Chlorides can cause premature hardening of concrete.
- True
- False
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Reflect on what premature hardening means.
Question 5.
A construction engineer is tasked to use concrete in a heavy traffic area. The local water source has high chloride content. What steps could the engineer take to ensure the concrete's strength?
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Think about ways to enhance water quality.
Question 6.
Two concrete samples were made, one with clean water and one with water containing high levels of sulphates. After curing, the sulphate-treated sample cracked significantly more. What are the implications for engineers?
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Reflect on testing protocols for water quality.

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