Scope *
1.1 This test method covers the determination of the uncon-
fined compressive strength of cohesive soil in the undisturbed,
remolded, or compacted condition, using strain-controlled
application of the axial load.NOTE 1--The determination of the unconsolidated, undrained strength
of cohesive soils with lateral confinement is covered by Test Method
D 2850.1.3 This test method is applicable only to cohesive materials
which will not expel bleed water (water expelled from the soil
due to deformation or compaction) during the loading portion
of the test and which 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 compression strength values.It is the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to useNOTE 2--Notwithstanding the statements on precision and bias con-
tained in this standard: The precision of this test method is dependent on
the competence of the personnel performing it and the suitability of the
equipment and facilities used.1.2 This test method provides an approximate value of the
strength of cohesive soils in terms of total stresses.Users of
this test method are cautioned that compliance with Practice D 3740 does
not ensure reliable testing.Agencies which meet the criteria of Practice
D 3740 are generally considered capable of competent testing.Reliable testing depends on several factors;
Practice D 3740 provides a means of evaluating some of those factors.1.4 This test method is not a substitute for Test Method
D 2850.1.5 The values stated in SI units are to be regarded as the
standard.The values stated in inch-pound units are approxi-
mate.1.6 This standard does not purport to address all of the
safety problems, if any, associated with its use.