DS DS/CEN ISO/TS 17892-7 Geotechnical investigation and testing - Laboratory testing of soil - Part 7: Unconfined compression test on fine grained soils (ISO/TS 17892-7:2004)
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DS DS/CEN ISO/TS 17892-7 Document Information:
Title
Geotechnical investigation and testing - Laboratory testing of soil - Part 7: Unconfined compression test on fine grained soils (ISO/TS 17892-7:2004)
Geoteknisk undersøgelse og prøvning - Laboratorieprøvning af jord - Del 7: Trykprøvning med uhindret sideudvidelse på finkornet jord
Dansk Standard
Publication Date:
Nov 29, 2004
Scope:
This Technical Specification 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 ENV 1997 parts 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.
It is not appropriate for fissured or varved clays and silts and peats.
Keywords:
- CHECKING EQUIPMENT
- COMPRESSION TESTING
- CONSTRUCTION
- DEFINITIONS
- DOCUMENTATIONS
- GEOTECHNICS
- ILLUSTRATIONS
- INTERPRETATIONS
- INVESTIGATIONS
- LABORATORY TESTS
- MATHEMATICAL CALCULATIONS
- PRESSURE
- SOIL SAMPLING
- SOIL SURVEYS
- TERMINOLOGY
- TEST REPORTS
- TESTING
- SAMPLING
- TOPOGRAPHY
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