Practice Compressive Strength Test (6.5.4) - Water – Requirements and Impurities

Practice: Compressive Strength Test

Lesson 6.5.4Water – Requirements and Impurities

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the minimum required strength a concrete cube made with test water should achieve?
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Think about the comparison with distilled water.
Question 2.
What does curing mean in concrete preparation?
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It helps concrete gain its strength.
3Question 3.
What is the purpose of the Compressive Strength Test?
- To determine the water quality
- To evaluate the strength of concrete
- To test for impurities in water
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Consider what aspect of concrete the test directly measures.
4Question 4.
True or False: Concrete should achieve 100% of the strength of distilled water mixes.
- True
- False
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Look back at what percentage we discussed for the test.
Question 5.
A construction team is considering using water from a nearby lake known for high organic content. They conduct a compressive strength test but find their concrete only reaches 70% of the distilled water strength. Discuss the potential impacts and what actions the team should take.
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Evaluate the risks of using contaminated water.
Question 6.
If a concrete mix using test water yields a compressive strength of 30 MPa after 7 days, what can be inferred about the strength of the mix made with distilled water? Calculate the minimum acceptable strength.
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Apply the 90% rule we discussed for compressive strength.

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