Controls Group http://www.controls-group.com/images/logo_controls.gif Constant Rate of Strain cell (CRS) Constant Rate of Strain cell (CRS) 26-WF0360/A; 26-WF0360/AS; 26-WF360/AD
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Soil mechanics

Constant Rate of Strain cell (CRS)

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ASTM D4186
Main features
General description
General description
This cell is used to measure the magnitude and rate‐of‐consolidation of saturated cohesive soils using
continuous controlled‐strain axial compression. The specimen is restrained laterally and drained axially to one surface. The axial force and base excess pressure are measured during the deformation process.
Controlled strain compression is typically referred to constant rate‐of‐strain (CRS) testing.
The test is performed using Constant Rate od Strain cell and other equipment including
Triaxial frame, Pressure system, Data acquisition and processing system and other accessories. 
It can be use in a standard system with manual control ( automatic or manual acqusition) or in a automatic control and data acqusition using a dedicated activation code. 

Three different different model are available: 
  • Constant rate of Strain (CRS) suitable for external load cell 
  • Constant rate of Strain (CRS) suitable for submersible load cell 
  • Adapter for triaxial cell model 28-WF4070 
More +

Technical specifications


  26-WF0360/A 26-WF0360/AS 26-WF0360/AD
Stand Alone  yes yes Adaptor for
28-WF4070
Specimen size
diameter x height [mm]
63.5 x 25.4 
Maximum working pressure [kPa]  3500 
Number of valves
3
 
Air vent  yes


Ordering info

26-WF0360/A
CRS - Constant Rate of Strain cell model suitable for external load cell
 
26-WF0360/AS
CRS - Constant Rate of Strain cell model suitable for submersible load cell 

26-WF0360/AD
Adaptor for trixial cell model 28-WF4070 to perform  Constant Rate of Strain test 
 

Accessories

26-WF0360/1
 Cutting ring and accessories for preperation of  CRS sample                                       

Upgrading

Configuration 1
CRS cell + Tritech frame + Air/water bladder + Geodatalog8
 

Code Description Q.ty
Triaxial frame
28-WF4005 Tritech50 - Triaxial load frame 50 kN capacity 1
CRS cell and accessories
28-WF0360/A* CRS cell suitable for external load cell 1
28-WF0360/1 Accessories for preparation of CRS specimen 1
28-WF4005/39 Base adaptor for CRS cell on triaxial frame 1
*CRS cell compatible with submersible load cell is also available – WF0360/AS
Pressure system
28-WF4320 Bladder air/water cylinder with 1000 kPa banded chamber 1
28-WF4330/2 Digital pressure gauge 1- 2000 kPa 1
28-WF4330 Triaxial panel two ways 1
28-WF4191 Nylon tubing 6mm bore x 8 mm outside dia., 10 m lenght 1
86-D2015 Laboratory air compressor. 8 BAR max constant
pressure. 230V/50Hz/1Ph                     
1
28-WF2016/2 Water trap for air/water assembly 1
Load cell
28-WF0375/T* 50 kN capacity strain gauge load cell 1
*Submersible load cell 50 kN capacity is requested for CRS cell model WF0360/AS
Displacement transducer
30-WF6207 Linear potentiometric transducer 10 mm travel 1
30-WF6221 Mounting bracket for displacement transducer 1
Pressure transducer
28-WF6301/A Pressure transducer 0-2000 kPa 1
28-WF6310 De airing block for connection to CRS cell 1
Data acquisition
30-WF6008 Geodatalog8 multipurpose datalogger, 8 channels 1
82-P9008/ELT Set of four cables for connecting load cells, pressure transducers, displacement transducers 1
De airing water system
27-WF4220/A De airing water tank 7 lt capacity 1
86-D2001 Portable vacuum pump free air displacement 75l/min, ultimate vacuum 0.1 mbar. 230V/50-60Hz/1Ph 1
86-D2064 Rubber tube for vacuum pump 1
86-D2005 Air drying unit, to use with silica gel with indicator 1
86-D0819 Silica gel with indicator. 1000 g 1
28-WF4225 Valve panel for use with de-airing tank 1
28-WF2016/2 Water trap for air/water assembly 1
28-WF4191 Nylon tubing 6mm bore x 8 mm outside dia., 10 m lenght 1
Data elaboration software
30-WF6016/T6 CRS Geo-Analysis template conforming to ASTM D4186 1
































































Configuration 2 
CRS cell + Tritech frame + Hydromatic+ Geodatalog8


Code Description Q.ty
Triaxial frame
28-WF4005 Tritech50 - Triaxial load frame 50 kN capacity 1
CRS cell and accessories
28-WF0360/A* CRS cell suitable for external load cell 1
28-WF0360/1 Accessories for preparation of CRS specimen 1
28-WF4005/39 Base adaptor for CRS cell on triaxial frame 1
*CRS cell compatible with submersible load cell is also available – WF0360/AS
Pressure system
28-WF45SG Hydromatic standalone pressure/volume controller, single pressure line. 3500 kPa capacity 1
28-WF4191 Nylon tubing 6mm bore x 8 mm outside dia., 10 m lenght 1
Load cell
28-WF0375/T 50 kN capacity strain gauge load cell 1
*Submersible load cell 50 kN capacity is requested for CRS cell model WF0360/AS
Displacement transducer
30-WF6207 Linear potentiometric transducer 10 mm travel 1
30-WF6221 Mounting bracket for displacement transducer 1
Pressure transducer
28-WF6301/A Pressure transducer 0-2000 kPa 1
28-WF6310 De airing block for connection to CRS cell 1
Data acquisition
30-WF6008 Geodatalog8 multipurpose datalogger, 8 channels 1
82-P9008/ELT Set of four cables for connecting load cells, pressure transducers, displacement transducers 1
De airing water system
27-WF4220/A De airing water tank 7 lt capacity 1
86-D2001 Portable vacuum pump free air displacement 75l/min, ultimate vacuum 0.1 mbar. 230V/50-60Hz/1Ph 1
86-D2064 Rubber tube for vacuum pump 1
86-D2005 Air drying unit, to use with silica gel with indicator 1
86-D0819 Silica gel with indicator. 1000 g 1
28-WF4225 Valve panel for use with de-airing tank 1
28-WF2016/2 Water trap for air/water assembly 1
28-WF4191 Nylon tubing 6mm bore x 8 mm outside dia., 10 m lenght 1
Data elaboration software
30-WF6016/T6 CRS Geo-Analysis template conforming to ASTM D4186 1


























































Configuration 3
CRS + ACE EmS


Automatic Computerized Oedometer ACE EmS


Configuration 4
CRS + Autotriax2 EmS


Automatic triaxial tests system - AUTOTRIAX 2








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