Adapted from Mesri et. al. (1994) ASCE, GSP No. 40. Also see Mesri et. al. (1984), Gest. 34(3) & (1987) ASCE, JGE, 113(3).

Granular soils including rockfill

Shale and mudstoneInorganic clays and silts

Organic clays and siltsPeat and muskeg

0.02 0.01+

0.03 0.01+

0.04 0.01+

0.05 0.01+

0.06 0.01+

Material Cα/Ce

Cα/CeValues of for Geotechnical Materials

0.005

0.07

0.06

Cα/Cc = 0.045

0.05

0.04

0.03

0.02

0.01

00 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

0.004

0.003

0.002

0.001

00 0.02 0.04 0.06 0.08 0.10 0.12

Cα

= ∆ e

/∆ lo

g t

Cα

= ∆e

/∆ lo

g t

Cα

= ∆e

/∆ lo

g t Cα/Cc = 0.029

Cc = ∆e/∆ log σv̀

Cc = ∆e/∆ log σ'v

Tar Sand

Cc = ∆e/∆ log σv̀

Canadian Quick Clay

Shale

Adapted from Mesri & Castro (1987), "Cα / Cc Concept and Ko During Secondary Compression". ASCE, JGE, 113(3), 230-247.

Cαe vs. Cc Relationships for three soils

Test no.TR -1

-2-3-4

Initial PropertiesVoid Ratio = 0.504Water Content = 8.2%Tar Content = 8.5%Degree of Saturation = 88%

Test no.BFPD -1

-2-3

-4

-5

Wo = 29.4 %

Wl = 288 %

Wp = 44 %

σ'p = 4.8 MPa

0.012

0.008

0.004

00 0.1 0.2 0.3 0.4 0.5

BE-1Test NO.

-2-3-4-7-8

-13-14-15-16

wo = 56-61 %w2 = 46 %wp = 24 %σ'p/σ'vo = 1.31

Cα

Cαe

Cα/Cc = 0.035