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Schneider's approximation 9k = m9 = 46.8 °v mdm9

Prior knowledge

Well-established experience

Leigton Buzzard Sand is a dense medium sand with density index = 80%

Critical state angle of shearing resistance is: 9crit = 35°© At the average expected mean confining pressure p' = 100kPa©

Relative dilatancy index: Ir = 0.8

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Estimated modal angle 9mode = 5° x Ir + 9crit = 51.6 °© At the lowest expected mean confining pressure p' = 55kPa©

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Relative dilatancy index: Ir = 0.8 Estimated maximum angle 9max = 5° x Ir + 9crit = 54

At the highest expected mean confining pressure p' = 220kPa©

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Relative dilatancy index: Ir = 0.8

Estimated minimum angle 9>min = 5° x Ir + 9crit = 48.4°

Estimates of characteristic value

Estimate of mean: ^mean =

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