Point Load Test

The GCTS PLT-2W Point Load Testing Device is an easy-to-use system made of light-weight, high-strength anodized aluminum that remains extremely accurate while being very portable. Due to the compact design, this test can be performed either in a laboratory or in the field. The PLT-2W is used to determine the rock strength index of a sample, which can be used to estimate the uniaxial compressive strength of the sample.  The system includes software to automatically collect and analyze the data and report the average unconfined strength. It operates on battery power and is able to wirelessly link with an iOS, Android, and Windows devices to simplify data collection and eliminate unnecessary errors. All measured readings by the system are transmitted to the GCTS PLT App on the mobile device, allowing the user to view and analyze data directly. The app also allows for the user to edit collected data as needed and, when ready, the data can be sent directly from the GCTS App to any e-mail(s) the user desires.Additional parts can be added to the Point Load Tester to give it the ability to perform Brazilian, Uniaxial, Brinell, and Ultrasonic Velocity tests. This allows the Point Load Tester to be a small, inexpensive device that can test a wide variety of rock strength parameters.

 

Video Demonstration

PLT-2W

HIGHLIGHTS

  • 100 kN (22 kip) load capacity
  • Compact, light-weight design (under 16 kg)
  • Wireless data acquisition to mobile application (available for iOS, Android, and Windows devices)
  • Includes load and displacement sensors
  • Internal battery operation
  • Automatic specimen gauging

SPECIFICATIONS

  • Dimensions: 48 x 23 x 41 cm (19 x 9 x 16 inch)
  • Net Weight: 16 kg (36 lb)
  • Horiz. Daylight Opening: 100 mm (4 inch)
  • Vert. Daylight Opening: 125 mm (5 inch)
  • Displacement Stroke: 50 mm (2 inch)
  • Operating Temperature: 0 – 54°C (32 – 130°F)

POWER

  • Internal: 4 AA batteries (40 hours of continuous operation)
  • External: 5 VDC (USB 2.0 Micro-AB connector) @ 500 mA

SHIPPING

  • Weight*: 35 kg (76 lb)
  • Volume*: 82 x 64 x 40 cm (32 x 25 x 16 inch)
    • *Includes PLT-2W-CASE

WARRANTY

  • One (1) year parts and labor

Optional Upgrades

Ultrasonic Velocity

  • ULT-2 – Test controller for automatic measurements of ultrasonic velocities through soils, rocks or
    concrete specimens. Provides signal conditioning and pulse generation.

Unconfined Compression & Indirect Tension

  • PLT-RIT-B – Apparatus for determining indirect tensile strength by the Brazilian test according to the
    International Society for Rock Mechanics standard. Requires a suitable compression frame

Brinell Hardness

  • PLT-BRINELL – Brinell testing apparatus to measure the hardness of rock cores with diameters up to 100-
    mm.

Servo Control

  • PLT-ePVC – Provides complete servo-control of the load and displacement on a GCTS PLT-2W Point Load Tester. Load, loading rate, and displacement rate can all be used to control the system via mobile application, Windows computer, or included manual keypad. Ideal upgrade for the performance of Unconfined Compression and Indirect Tension tests.

Foot Pump

  • PLT-FOOT-PUMP – Foot pump for application of loads during point load test with GCTS PLT-2W. Allows for
    control of the loading piston through a steady application of pressure.

Automate Your PLT-2W

PLT-ePVC – The Servo-Control Upgrade for PLT-2W transforms the GCTS Point Load Tester by enabling full servo-control of load and displacement. Users can control the load, loading rate, and displacement rate using a mobile app, a Windows computer, or the included manual keypad. This upgrade enhances the device for performing Unconfined Compression and Indirect Tension tests.

Relevant Standards

ASTM D5731 Standard Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications

ASTM D7012 Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock

ASTM D3967 Standard Test Method for Splitting Tensile Strength of Intact Rock Core Specimens

ASTM E10 Standard Test Method for Brinell Hardness of Metallic Materials

ISRM Suggested Method for Determining Point Load Strength

ISRM Suggested Method for Determination of the Uniaxial Compressive Strength of Rock Materials

ISRM Suggested Method for Determining Indirect Tensile Strength by the Brazil Test

Physical and mechanical properties of winter first-year ice in the Antarctic marginal ice zone along the Good Hope Line

Skatulla, S., Audh, R. R., Cook, A., Hepworth, E., Johnson, S., Lupascu, D. C., MacHutchon, K., Marquart, R., Mielke, T., Omatuku, E., Paul, F., Rampai, T., Schröder, J., Schwarz, C., and Vichi, M.: Physical and mechanical properties of winter first-year ice in the Antarctic marginal ice zone along the Good Hope Line, The Cryosphere Discuss. [preprint], https://doi.org/10.5194/tc-2021-209, in review, 2021.

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Point Load Test

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