Geology Reference
In-Depth Information
4000
q u = 3930 lb/ft 2
3500
3000
2500
2000
q u = 3930 lb/ft 2
1500
q u
2
c = = 1965 lb/ft 2
1000
500
0
10
20
30
40
50
Δ H
H 0
Unit strain, (in./in. x 10 -3 )
1 8
J D
I - 8 5 - 5 ( 3 )
6 / 3 / 08
Sample No.
Project No.
Plotted by
Date
Figure 21-3
Relationship between Load per Unit Area and Unit Strain
The test described covers the determination of the unconfined compres-
sive strength of cohesive soil in the undisturbed, remolded, or com-
pacted condition, using strain-controlled application of axial load. It
provides an approximate value of the strength of cohesive soils in terms
of total stresses. The method is applicable only to cohesive materials
that will not expel bleed water (water expelled from the soil due to
deformation or compaction) during the loading portion of the test and
that will retain intrinsic strength after removal of confining pressures,
such as clays or cemented soils. Dry and crumbly soils, fissured or
varved materials, silts, peats, and sands cannot be tested with this
method to obtain valid unconfined compressive strength values. [1]
SUMMARY
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