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Pervious sand having air content 15% is used in foundation of a masonry dam. If the maximum permissible upward gradient for a factor of safety of 3 against boiling is 0.315. The percentage air voids in the pervious sand will be ______ %.
    Correct answer is '6.2-6.6'. Can you explain this answer?
    Verified Answer
    Pervious sand having air content 15% is used in foundation of a masonr...
    Concept:
    F.O.S against boiling is giving by
    ier = critical hydraulic gradient
    iper = permissible hydraulic gradient
    η = percentage air voids
    ac = air content
    η = porosity
    calculation:
    icr = iper x FOS
    icr = 0.315 × 3
    icr = 0.945
    e = 0.746
    η = 0.427 = 42.7%
    ac = 15%
    ηa = 0.427 × 0.15
    ηa = 0.06405
    ηa = 6.405%
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    Most Upvoted Answer
    Pervious sand having air content 15% is used in foundation of a masonr...
    S+ac=1
    from that calculate s,
    then apply S=Vw/Vv. But Vw=Vv-Va/Vv
    By putting these we get Va ie nothing but air content.
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    Pervious sand having air content 15% is used in foundation of a masonry dam. If the maximum permissible upward gradient for a factor of safety of 3 against boiling is 0.315. The percentage air voids in the pervious sand will be ______ %.Correct answer is '6.2-6.6'. Can you explain this answer?
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    Pervious sand having air content 15% is used in foundation of a masonry dam. If the maximum permissible upward gradient for a factor of safety of 3 against boiling is 0.315. The percentage air voids in the pervious sand will be ______ %.Correct answer is '6.2-6.6'. 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 Pervious sand having air content 15% is used in foundation of a masonry dam. If the maximum permissible upward gradient for a factor of safety of 3 against boiling is 0.315. The percentage air voids in the pervious sand will be ______ %.Correct answer is '6.2-6.6'. 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 Pervious sand having air content 15% is used in foundation of a masonry dam. If the maximum permissible upward gradient for a factor of safety of 3 against boiling is 0.315. The percentage air voids in the pervious sand will be ______ %.Correct answer is '6.2-6.6'. Can you explain this answer?.
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