Geotechnical Engineering

DHARM

IDENTIFICATION AND CLASSIFICATION OF SOILS 107

Fig. 4.6

Flow chart for classification of fine-grained soils

L

Liquid limit less than 35

H

Liquid limit greater than 50

Below A-line

or hatched zonein plasticity chart

Limits plot inhatched zone

in plasticity chart

Above A-line andhatched zone inplasticity chart

Colour odour,

possibly

and

on oven-dry soil

wwLp

Above A-line onplasticity chart

Below A-line onplasticity chartColour odour,possibly

and

on oven-dry soil

wwLp

Below A-line onplasticity chartColour odour,

possibly

and

on oven-dry soil

wwLp

Above A-line onplasticity chart

Organic

Inorganic

Inorganic

Organic

M

I

OI

C

I

MH

OH

Organic

OL

ML

ML–CL

CL

Inorganic

CH

FINE-GRAINED SOILS

More than 50% pass 75- IS sieve

m

Run

and

on minus 425-

IS sieve material

wwLp

m

I

Liquid limit between 35 & 50