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220239 - 44 Williams Road, KIN KIN - Site Classification Report
D depth of that soil type.
Soil Descriptions
Description and Classification of Soils for Geotechnical Purposes: Refer to AS1726-1993 (Appendix A).
The following chart (adapted from AS1726-1993, Appendix A, Table A1) is based on the Unified Soil Classification System (USCS).
Soil Colour: Is described in the moist condition using black, white, grey, red, brown, orange, yellow, green or blue. Borderline cases can be described
as a combination of two colours, with the weaker followed by the stronger. Modifiers such as pale, dark or mottled, can be used as necessary. Where
colour consists of a primary colour with secondary mottling, it should be described as follows:
(Primary) mottled (Secondary). Refer to AS 1726-1993, A2.4 and A3.3.
USCS
Particle Group
Major Divisions Typical Names Laboratory Classification
size mm Symbol
% < 0.075 mm Plasticity of Cu= D60 Cc = (D 30)2
NOTES
(2) fine fraction D10 (D10)(D60)
BOULDERS
(more than half of material less than 63 mm is larger than 0.075mm)
200
COBBLES
63 Well graded gravels and
Between 1
GW gravel-sand mixtures, little or 0-5 >4 (1) Identify fines by
and 3
no fines
Use the gradation curve of material passing 63 mm for classification of fractions according to the criteria given in 'Major Divisions'
the method given
for fine-grained
Poorly graded gravels and
Fails to comply with soils.
GP gravel-sand mixtures, little or 0-5
COARSE GRAINED SOILS
GRAVELS coarse above
no fines, uniform gravels
(more than 20
half of Silty gravels, gravel-sand-silt Below 'A'
GM 12-50
mixtures (1) line or PI<4
coarse medium
fraction is Above 'A' line
Clayey gravels, gravel-sand
GC 12-50 and (2) Borderline
larger than 6 clay mixtures (1)
PI>7 classifications
2.36 mm) fine occur when the
Well graded sands and
2.36 Between 1 percentage of
SW gravelly sands, little or no 0-5 >6
and 3 fines (fraction
fines
SANDS smaller than
Poorly graded sands and
Fails to comply with 0.075 mm size)
(more than SP gravelly sands, little or no 0-5
coarse above is greater than
half of coarse fines
0.6 5% and less than
fraction is 12%. Borderline
Silty sands, sand silt mixtures Below 'A'
smaller than SM 12-50 classifications
(1) line or PI<4
2.36 mm) medium require the use
0.2 Above 'A' line of SP-SM,
Clayey sands, sand-clay
fine 0.075 SC 12-50 and GWGC.
mixtures (1)
PI>7
Inorganic silts, very fine
sands, rock flour, silty or
ML
(more than half of material less than 63 mm is smaller than 0.075 mm)
clayey fine sands or clayey
SILTS & CLAYS silts with slight plasticity
(Liquid Limit ≤50%)
Inorganic clays of low to
medium plasticity, gravelly
CL CI
clays, sandy clays, silty clays,
lean clays
FINE GRAINED SOILS
Organic silts and clays of low
OL
plasticity
Inorganic silts, mic- aceous
MH or diato-maceous fine sands
or silts, elastic silts
Inorganic clays of high
CH
SILTS & CLAYS plasticity, fat clays
(Liquid Limit >50%)
Organic silts and clays of high
OH
plasticity
HIGHLY ORGANIC Peat and other highly organic
PT
SOILS soils
Soil Moisture Condition: Is based on the appearance and feel of soil. Refer to AS 1726-1993, A2.5.
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