99.60 Withdrawal effective Feb 14, 2018
CEN
CEN/TC 341 Geotechnical Investigation and Testing
Technical Specification
13.080.20 Physical properties of soils | 93.020 Earthworks. Excavations. Foundation construction. Underground works
Withdrawn
ISO/TS 17892-7:2004 covers the determination of an approximate value of the unconfined compressive strength for a square or cylindrical water-saturated homogeneous specimen of undisturbed or remoulded cohesive soil of sufficiently low permeability to keep itself undrained during the time it takes to perform the test within the scope of geotechnical investigations according to prEN 1997-1 and -2.
The unconfined compressive strength of cohesive soils is a measure of the apparent cohesion. A cohesive soil behaves as if it is truly cohesive, e.g. clay and clayey soils, but most soils in this group behave cohesively due to negative pore pressure and friction and not due to actual cohesion.
This test method is useful to derive the undrained shear strength of soil. It should however be noted that no provisions are taken to prevent drainage. The derived value for undrained shear strength is therefore only valid for soils of low permeability, which behave sufficiently undrained during testing.
The method is not appropriate for fissured or varved clays or silts or peats.
WITHDRAWN
CEN ISO/TS 17892-7:2004
99.60
Withdrawal effective
Feb 14, 2018
WITHDRAWN
CEN ISO/TS 17892-7:2004/AC:2005
PUBLISHED
EN ISO 17892-7:2018