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For water to be suitable for making concrete, the average 28 days compressive strength of at least three 150 mm cement concrete cubes shall not be less than,
  • a)
    90% of average strength of three similar concrete cubes prepared with distilled water
  • b)
    98% of average strength of three similar concrete cubes prepared with distilled water
  • c)
    average strength of five similar concrete cubes made with five different random water samples
  • d)
    95% of the 28 days design tensile strength
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
For water to be suitable for making concrete, the average 28 days comp...
Importance of Water Quality in Concrete
- Water plays a crucial role in the hydration process of cement, affecting the strength and durability of concrete.
- Poor quality water can lead to undesirable effects on the concrete properties.
- It is essential to use suitable water for making concrete to ensure the desired strength and performance.

Correct Answer Explanation
- The correct answer is option 'A' because it ensures that the water used for making concrete does not adversely affect the compressive strength.
- By requiring the average 28 days compressive strength of concrete cubes made with the water in question to be at least 90% of the strength of cubes made with distilled water, it ensures that the water quality does not compromise the concrete strength.
- This comparison with distilled water, which is considered pure and suitable for concrete, helps in determining the suitability of the water being tested.
- Meeting this criterion indicates that the water is of acceptable quality for making concrete, as it allows the concrete to achieve a significant portion of its strength potential without being negatively impacted by the water quality.
Therefore, option 'A' is the correct choice for ensuring that the water used for making concrete meets the required quality standards for satisfactory concrete performance.
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Community Answer
For water to be suitable for making concrete, the average 28 days comp...
As per IS 456:2000, Cl.5.4.1.2:
Average 28 days compressive strength of at least three 150 mm concrete cubes prepared with water proposed to be used shall not be less than 90 percent of the average of strength of three similar concrete cubes prepared with distilled water.
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For water to be suitable for making concrete, the average 28 days compressive strength of at least three 150 mm cement concrete cubes shall not be less than,a)90% of average strength of three similar concrete cubes prepared with distilled waterb)98% of average strength of three similar concrete cubes prepared with distilled waterc)average strength of five similar concrete cubes made with five different random water samplesd)95% of the 28 days design tensile strengthCorrect answer is option 'A'. Can you explain this answer?
Question Description
For water to be suitable for making concrete, the average 28 days compressive strength of at least three 150 mm cement concrete cubes shall not be less than,a)90% of average strength of three similar concrete cubes prepared with distilled waterb)98% of average strength of three similar concrete cubes prepared with distilled waterc)average strength of five similar concrete cubes made with five different random water samplesd)95% of the 28 days design tensile strengthCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about For water to be suitable for making concrete, the average 28 days compressive strength of at least three 150 mm cement concrete cubes shall not be less than,a)90% of average strength of three similar concrete cubes prepared with distilled waterb)98% of average strength of three similar concrete cubes prepared with distilled waterc)average strength of five similar concrete cubes made with five different random water samplesd)95% of the 28 days design tensile strengthCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For water to be suitable for making concrete, the average 28 days compressive strength of at least three 150 mm cement concrete cubes shall not be less than,a)90% of average strength of three similar concrete cubes prepared with distilled waterb)98% of average strength of three similar concrete cubes prepared with distilled waterc)average strength of five similar concrete cubes made with five different random water samplesd)95% of the 28 days design tensile strengthCorrect answer is option 'A'. Can you explain this answer?.
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