PTST: Laboratory Permeability Tests

  • 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
PTST_TESN   X 2 Test reference
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
PTST_COND   PA Undisturbed Sample condition
PTST_SZUN mm 0DP 5 Size cut off of material too coarse for testing
PTST_UNS % 0DP 36 Proportion of material removed above PTST
PTST_DIAM mm 2DP 102.52 Specimen diameter
PTST_LEN mm 2DP 200.22 Specimen length
PTST_MC % MC 20 Initial moisture content of test specimen
PTST_BDEN Mg/m3 2DP 2.24 Initial bulk density of test specimen
PTST_DDEN Mg/m3 2DP 1.87 Initial dry density
PTST_IDIA mm 2DP 3.75 Diameter of drain for radial permeability in hydraulic cell
PTST_DMET   X Bored using mandrel and filled with saturated sand Method of forming central drain
PTST_VOID   3DP 0.375 Initial voids ratio
PTST_K m/s 1SCI 4.10E-06 Coefficient of permeability
PTST_TSTR kPa 0DP 112 Mean effective stress at which permeability measured (when measured in triaxial or hydraulic cell).
PTST_HYGR   0DP 1 Hydraulic gradient at which permeability measured (for constant head test).
PTST_ISAT % 2SF 72 Initial degree of saturation
PTST_SAT   X Back pressure, Bf = 0.96 Details of saturation, where appropriate
PTST_CONS   X Drainage to top with pwp at base Details of consolidation, where appropriate
PTST_PDEN Mg/m3 XN #2.65 Particle density with prefix # if value assumed
PTST_TYPE   PA Falling head Type of permeability measurement
PTST_CELL   PA Triaxial cell Type of permeameter
PTST_REM   X   Remarks on test
PTST_METH   X BS1377 Part 5 or part 6, KH Head vol 2 or vol 3, EA Accelerated test Test method
PTST_LAB   X ACME Laboratories plc Name of testing laboratory/organisation
PTST_CRED   X UKAS 0000 Accrediting body and reference number (when appropriate)
TEST_STAT   X Checked Test status
FILE_FSET   X FS28 Associated file reference (eg test result sheets)

Notes - 2

  • The suggested units for PTST_PDEN have been amended to Mg/m3.
  • New headings added to permit details of test method, laboratory and test accreditation to be included in data.