Standard: BS 1377:7, ASTM D2166, AASHTO T208
Unconfined Compression Apparatus, Motorized
Unconfined Compression Apparatus is a testing device used to accurately determine the unconfined compressive strength of soil specimens. Its motorized operation allows for precise and controlled application of axial load to a soil sample without the confining pressure typically applied in other compression tests.
The key purpose of the Motorized Unconfined Compression Apparatus is to provide essential data on soil strength parameters, which are crucial for geotechnical design and analysis. The apparatus is designed with load sensors and displacement measuring devices to accurately record applied loads and soil deformation throughout the test.
Loading Frames: Accessories for Uniaxial And Unconfined Compression Tests
Operate by moving the platen through a mechanical gear. The apparatus comes with rapid approach speed and ensures rapid plate movement per handwheel revolution designed to suit small specimen loading. Supplied complete with the upper platen, proving ring with calibration certificate, penetration dial gauge 25 mm travel x 0.01 mm per division with gauge mounting bracket.
Feature of Motorized Unconfined Compression Apparatus
- Equipped with a motorized system that provides a controlled and consistent axial load application to soil specimens.
- Designed to accommodate various sizes of soil specimens.
- Modern apparatus systems come with data acquisition software for real-time data recording, analysis, and generation of stress-strain curves, providing detailed insights into soil behavior.
- Adheres to relevant industry standards such as ASTM and AASHTO for consistent and reliable testing practices.
Standards
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BS 1377:7: British Standard for consolidation and permeability characteristics of soils.
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ASTM D2166: ASTM International standard for determining unconfined compressive strength of cohesive soils.
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AASHTO T208: Published by AASHTO for determining hydraulic conductivity (permeability) of saturated porous materials.
Test Procedure for Unconfined Compression Apparatus
1. Prepare the Sample: Obtain and shape a soil sample as needed. Measure its dimensions and weight.
2. Set Up the Apparatus: Place the sample centrally on the lower platen of the apparatus, ensuring proper alignment and leveling.
3. Calibrate and Start Testing: Calibrate the load and displacement systems according to manufacturer guidelines. Start the motorized system to apply load gradually.
4. Monitor and Record: Monitor the sample for any deformation as the load increases. Record the maximum load at failure or the specified deformation limit.
5. Calculate Compressive Strength: Use the maximum load and sample area to calculate the unconfined compressive strength of the soil specimen.
6. Report and Clean Up: Prepare a test report documenting sample details, testing parameters, and results. Clean the apparatus and handle the sample according to laboratory protocols.
Technical Specifications of Unconfined Compression Apparatus
| Model Number |
NL 5023 X / 001 |
NL 5023 X / 004 |
| Capacity |
5 kN |
50 kN |
| Max. V. Clearance |
300 mm |
590 mm |
| Max. H. Clearance |
140 mm |
220 mm |
| Speed Rate (50 Hz) |
1.0 mm/min |
1.0 mm/min |
| Dimension (mm) |
310 (L) x 190 (W) x 540 (H) |
530 (L) x 375 (W) x 870 (H) |
| Approx. Weight |
16 kg |
53 kg |
| Power |
220 V, 50 / 60 Hz, 1 ph, 0.25 Hp |
220 V, 50 / 60 Hz, 1 ph, 0.25 Hp |
NL 5023 X / 001 Consists Of :
| Model Number |
Parts Description |
Qty |
| NL 7023 X 004 |
Proving Ring 5 kN |
1no |
| NL 5023 X / 001 – P 002 |
Specimen Plunger with Gauge Holder |
1set |
| NL 7020 X / 001 |
Dial Indicator 25 mm x 0.01 mm |
1no. |
*1 Copy of Manual Instruction
NL 5023 X / 004 Consists Of :
| Model Number |
Parts Description |
Qty |
| NL 7023 X / 005 |
Proving Ring 10 kN |
1no |
| NL 5023 X / 004 – P 002 |
Specimen Plunger with Gauge Holder |
1set |
| NL 7020 X / 001 |
Dial Indicator 25 mm x 0.01 mm |
1no. |
NL 5023 X / 004 Optional Accessories :
| Model Number |
Accessories Description |
| NL 7023 X / 009 |
Proving Ring 50 kN |
