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While proportioning a concrete mix for the purpose of quality control of concrete, the targeted mean strength should be,
  • a)
    Characteristic strength + 1.65 (standard deviation)
  • b)
    Characteristic strength + 1.65 (variance)
  • c)
    Characteristic strength + 1.5 (standard deviation)
  • d)
    Characteristic strength + 1.5 (variance)
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
While proportioning a concrete mix for the purpose of quality control ...
As per IS 456:2000, Cl. 9.2.2: Design concrete mix
The mix shall be designed to produce the grade of concrete having the required workability and a characteristic strength not less than appropriate values given in Table 2 of the code. The target mean strength of concrete mix should be equal to the characteristic strength plus 1.65 times the standard deviation.
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While proportioning a concrete mix for the purpose of quality control of concrete, the targeted mean strength should be,a)Characteristic strength + 1.65 (standard deviation)b)Characteristic strength + 1.65 (variance)c)Characteristic strength + 1.5 (standard deviation)d)Characteristic strength + 1.5 (variance)Correct answer is option 'A'. Can you explain this answer?
Question Description
While proportioning a concrete mix for the purpose of quality control of concrete, the targeted mean strength should be,a)Characteristic strength + 1.65 (standard deviation)b)Characteristic strength + 1.65 (variance)c)Characteristic strength + 1.5 (standard deviation)d)Characteristic strength + 1.5 (variance)Correct 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 While proportioning a concrete mix for the purpose of quality control of concrete, the targeted mean strength should be,a)Characteristic strength + 1.65 (standard deviation)b)Characteristic strength + 1.65 (variance)c)Characteristic strength + 1.5 (standard deviation)d)Characteristic strength + 1.5 (variance)Correct 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 While proportioning a concrete mix for the purpose of quality control of concrete, the targeted mean strength should be,a)Characteristic strength + 1.65 (standard deviation)b)Characteristic strength + 1.65 (variance)c)Characteristic strength + 1.5 (standard deviation)d)Characteristic strength + 1.5 (variance)Correct answer is option 'A'. Can you explain this answer?.
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