Oedometric modulus

Stroud & Butler (1975) - Mo (Eed)

•	for soils of medium plasticity

•	valid for medium to high plasticity clayey soils – of glacial clay origin

Stroud & Butler (1975)

•	for soils of low to medium plasticity (IP< 20)

•	valid for medium to low plasticity clayey soils – of glacial clay origin

Vesic (1970)

•	correlation valid for soft clays (minimum & maximum values)

Trofimenkov (1974), Mitchell & Gardner Confined Modulus

•	valid for clayey and clayey-silty soils (Qc/Nspt ratio=1.5-2.0)

Buismann-Sanglerat

•	valid for compact clays (Nspt <30), medium and soft (Nspt <4) and sandy loams (Nspt = 6-12)