ESCG: Effective Stress Consolidation Tests - General

  • Class: Samples, Amalgamated Specimens and Laboratory Test Scheduling
Heading Unit Type Example Description
LOCA_ID   ID 327-16A Location identifier
SAMP_TOP m 2DP 24.55 Depth to top of sample
SAMP_REF   X 24 Sample reference
SAMP_TYPE   PA U Sample type
SAMP_ID   ID ABC121415010 Sample unique global identifier
SPEC_REF   X 1a Specimen reference
SPEC_DPTH m 2DP 24.55 Depth to top of test specimen
SPEC_DESC   X Grey slightly gravelly clay Specimen description
SPEC_PREP   X Prepared according to client instructions Details of specimen preparation including time between preparation and testing
ESCG_TYPE   PA CD Test type
ESCG_CELL   X 250mm dia Hydraulic cell Type of equipment used
ESCG_COND   PA Undisturbed Sample condition
ESCG_SDIA mm 2DP 100.15 Test specimen diameter
ESCG_HIGT mm 2DP 100.25 Test specimen height
ESCG_MCI % MC 21 Initial moisture content
ESCG_MCF % MC 18 Final moisture content
ESCG_BDEN Mg/m3 2DP 2.12 Initial bulk density
ESCG_BDEF Mg/m3 2DP 2.2 Final bulk density
ESCG_DDEN Mg/m3 2DP 1.75 Initial dry density
ESCG_PDEN Mg/m3 XN #2.65 Particle density with prefix # if value assumed
ESCG_IVR   3DP 0.812 Initial voids ratio
ESCG_SATR % 0DP 98 Initial degree of saturation
ESCG_LOAD   X Equal, Free, triaxial Type of loading ( strain )
ESCG_DRAG   X To top, both ends, radial inwards, radial outwards Type of drainage
ESCG_PPM   X Centre base, offset Pore pressure measurement location
ESCG_SPRS kPa 2SF 100 Swelling pressure, if measured
ESCG_SATM   X Back pressure, cell only, water permeation Method of saturation
ESCG_SINC kPa 0DP 50 Saturation increments
ESCG_SDIF kPa 0DP 10 Differential pressure during saturation
ESCG_CELF kPa 0DP 310 Cell or diaphragm pressure at end of saturation
ESCG_BACF kPa 0DP 300 Back pressure at end of saturation
ESCG_BVAL   2DP 0.96 B value at end of saturation
ESCG_SVOL ml 1DP 10 Volume of water taken in during saturation
ESCG_REM   X Sample from base of U100 sample, axis vertical Remarks including commentary on effect of specimen disturbance on test result
ESCG_METH   X BS1377, part 6, cl 5 Test method
ESCG_LAB   X ACME Laboratories plc Name of testing laboratory/organisation
ESCG_CRED   X UKAS 0000 Accrediting body and reference number (when appropriate)
TEST_STAT   X Checked Test status
FILE_FSET   X FS9 Associated file reference (eg equipment calibrations)

Notes - 2

  • ESCG and ESCT are primarily designed to take data from the consolidation tests detailed in BS1377 Part 6 including hydraulic cells such as the Rowe cell. Other types of testing can be included but headings should only be populated where the data is consistent with those of the BS tests and ambiguity of terminology should be avoided.
  • ESCG_IVR should be used to report the initial voids ratio at the start of testing. This will not necessarily be the same as the voids ratio at the start of first stage consolidation ESCT due to saturation.