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Introduction

Geotest manufactures a variety of compression machines suitable for performing this test. More machines can be found in the triaxial section. All unconfined compression machines can be equipped to measure axial stress with a double proving ring or a load cell with digital display. Load cell models offer extreme accuracy as readout displays to 0.1 lbf or 1N and includes a peak hold feature. All Geotest unconfined compression apparatus conform to ASTM D2166; AASHTO T208.

MULTI-LOADERS are also routinely used for unconfined testing.See related items S5830, S5830A, and S5831.

Unconfined Compression Apparatus
ASTM D2166; AASHTO T208

Standard Geotest unconfined compression machines are supplied with a double proving ring or load cell and digital display which reads directly to 0.1 lbf or 1N and have a peak hold. Proving ring models include a calibration chart in both pounds and SI units. Pounds will be supplied unless SI units are specified. Strain is measured with a 1" travel (25mm on SI versions) dial indicator. 2" (50mm) dial indicators or EDDIs can replace dial indicator as an added option.

On hand operated versions load is applied to the specimen by turning an aluminum hand crank connected to a gear box that drives the lower platen. Total platen movement is 3" (76.2mm). Rate of strain is regulated by speed of rotation of the hand crank (50 turns equal approximately 0.125" or 3.2mm). Size is 15x8x33" (381x203x838mm).

Motorized unconfined compression devices will perform all standard tests requiring an adjustable rate of 1 to 10% strain on samples from 1 to 3" (25.4 to 76.2cm) in diameter. As on all Geotest manufactured compression machines, they are vibration free with precise, repeatable strain rate control from 0.005 to 0.315 inch (0.12 to 8mm) per minute. Speeds are maintained constant within 2% despite variation in load or small voltage changes. Circuitry is all solid state, full wave SCR control with feed back regulation. Controls include graduated speed dial, line fuse, motor fuse, fwd/brake/rev switch with dynamic braking, on-off switch and pilot light. Size is 15x10x33" (381x254x838mm). Standard electrical requirements are 115VAC; for 230VAC, add -3 to catalog number.

Platens are 3" in diameter and have concentric rings to aid in centering sample. Platen height is 10" (254mm). Width between columns is 7.75" (197mm). Apparatus includes 2 plastic discs that can be used as spacers when positioning sample.

Most unconfined tests are performed on 6" high samples. If a 2" or 50mm travel dial indicator is needed, please advise so that we can quote a price.

Following are the catalog numbers available. Modifications can be made to fit exact needs.

Hand Operated Unconfined Compression Testers
Cat.No.
w/proving
ring
Capacity
(approx. sens.)
w/prov.ring
Cat.No.
w/load
cell
Capacity
(Sensitivity)
w/load cell
S2000 1500 (0.5) lbf S2002 2,000 (0.1) lbf
S2001 500 (0.1) lbf or 10kN (1N)

Hand operated-Shipping Weight: 35 lb (16 kg); 3 cu.ft.

We can convert most hand unconfined compression testers to automatic data acquisition in the field with a lap top PC.

Economy Motorized Unconfined Apparatus
Cat. No.
w/proving
ring
Capacity
(approx.sens.)
w/prov.ring
Cat.No
w/load
cell
Capacity
(Sensitivity)
w/load cell
S2010 1500 (0.5) lbf S2008 2,000 (0.1) lbf
S2011 500 (0.1) lbf or 10kN (1N)

Motorized-Shipping Weight: 65 lb (30kg); 5 cu. ft.

S2000.11 Spare Plastic Disks for all Unconfined



Items in the category: unconfined

  Hand Operated Unconfined Compression Tester 1500 lbf


  Hand Operated Unconfined Compression Tester 500 lbf


  Hand Operated Unconfined Compression Tester 2000 lbf


  Economy Motorized Unconfined Apparatus 1500 lbf


  Economy Motorized Unconfined Apparatus 500 lbf


  Economy Motorized Unconfined Apparatus 2000 lbf


  Precision Unconfined Apparatus 2000 lbf, digital


  Unconfined Data Acquisition System


  Unconfined Software Program


  Field Unconfined Tester


  Precision Unconfined Apparatus 2000 lbf, manual or computer


  Precision Unconfined Apparatus 2000 lbf, dial


 

 

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Geotest Instrument Corporation
241 S. Frontage Road., Suite 38
Burr Ridge,IL 60527 USA
sales@geotestusa.com
http://www.geotestusa.com