Controls Group Standard triaxial cells and accessories Standard triaxial cells and accessories
Soil mechanics

Standard triaxial cells and accessories

BS 1377:7 | ASTM D2850 | ASTM D4767 | BS 1377:8 | NF P94 070 | NF P94 074 | CEN- ISO/TS 17892-9 | CEN- ISO/TS 17892-8
General description
General description
The cell essentially consists of a transparent polycarbonate chamber which has a piston assembly fit to the top and a double flange base fit to the bottom.  Three (or six) simple thumbscrew are used to clamp the upper part of the cell to the base, which make assembly and disassembly a very quick and simple operation. The base of the cell has four inlet points for top and drainage/back pressure, cell pressure and bottom drainage/pore water pressure. Two of these are supplied with special no-volume change valves.
Base adapters, plinths, top caps, porous disc, rubber membranes and sealing rings are not included.
See accessories.
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Technical specifications

Cell model 28-WF0410/B 28-WF0411/B 28-WF0416/A
Max. specimen size
Dia. x height
50x100 70x140 100x200
Max. working pressure 1700 kPa 1700 kPa 1700 kPa
Max. load on the piston 45 kN 45 kN 45 kN
Max height 380 mm 440 mm 515 mm
Diameter 140 mm 174 mm 200 mm
Weight approx.: 4 kg 7.3 kg 14.3 kg

Ordering info

Standard triaxial cell for 35, 38 and 50 mm dia. samples

Standard triaxial cell for 35, 38, 50 and 70 mm dia. samples

Standard triaxial cell for 70 and 100 mm dia. samples


Triaxial cell specimen base adapters
Each cell has to be completed with the base adapter corresponding to the specimen size as shown in the following tables. All adapters are perforated for bottom drainage/pore pressure measurement and are supplied complete with a solid disc for use in undrained tests.

Cell code
Specimen dia.
28-WF0410/A 28-WF0411/A 28-WF0416/A
  Adapter codes Adapter codes Adapter codes
35 mm 28-WF0410/A1 28-WF0411/A1 -
38 mm 28-WF0410/A2 28-WF0411/A2 -
50 mm 28-WF0410/A3 28-WF0411/A3 -
70 mm - 28-WF0411/A4 28-WF0416/A1
100 mm - - 28-WF0416/A2

Triaxial cell accessories
For specimens Dia. 35 mm Dia. 38 mm Dia. 50 mm Dia.70 mm Dia. 100 mm
For base adapters
Part description Codes Codes Codes Codes Codes
Porous top cap 0420/A3 0422/A3 0425/A3 0428/A3 0432/A3
Pair of porous discs 0420/A4 4034 4054 4074 4104
Membrane (10 pcs) 0420/A5 4035 4055 4075 4105
O ring (10 pcs) 0420/7 4036 4056 4076 4106
Membrane stretcher 0420/8 4031/A 4051/A 4071/A 4101/A
O ring placing tool 0420/10 4031/B 4051/B 4071/B 4101/B
Lateral filter drains
50 pieces
0420/A9 4031/E 4051/E 4071/E 4101/E
Filter discs
Pack of 100
- 4031/F 4051/F 4071/F 4101/F
Split sand former 0420/A6 0422/A6 0425/A6 0428/A6 0432/A6
Drainage burette 0420/11 0420/11 0420/11 0420/11 0432/112
No-volume change
0420/12 0420/12 0420/12 0420/12 0420/12
Split mould 0420/13 0422/13 0425/13 - -
1 Depending upon cell model.    2 50 ml model.  3 Complete with connector and 6 mm dia. hose
Note: all accessories are shown in the Widening paragraph.

Cutter, wooden dolly and receivers
Used to produce the soil specimen from a larger sample. Comprising cutter, wooden dolly and receiver.
Stainless steel cutter tube and receiver.

Complete set
Size (dia.x h)
Spare cutter tube
Spare dolly
28-WF0420/9 35x70 28-WF0420/91 28-WF0420/91
28-WF4031/G 38x76 28-WF0422/91 28-WF0422/92
28-WF4051/G 50x100 28-WF0425/91 28-WF0425/92
28-WF4071/G 70x140 28-WF0428/91 28-WF0428/92
28-WF4101/G 100x200 28-WF0432/91 28-WF0432/92

Other accessories

Platen adapter to fit 28-WF0410/B standard triaxial cell on Tritech 50 and 100 frames.

Water-repellent grease. 1 kg box

Greaser for triaxial cells

Flaring tool

Nylon tubing 6x4 mm dia., 20 m coil.


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