Triaxial Load Frames

Triaxial Load Frames are used to determine shear strength tests, (stress-strain relationships) of soil samples mounted in triaxial test cells pressurized with a fluid to replicate confining pressures. Karol-Warner manufactures Triaxial Load frames in 10,000 or 20,000lbf (44.5 or 89kN) capacities, and with a wide range of strain rates which are controllable to ±1% of the setpoint, allowing the Geotechnical Testing labs to perform unconsolidated-undrained (UU), consolidated-undrained (CU), consolidated-drained (CD) with pore-pressure as well as Unconfined compressive strength tests.

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Click the Load Frame Comparison Table above to enlarge, print, or download. The table indicates force capacity and strain rate for common geotechnical testing applications.

All models include a robust 3/4hp motor, heavy-duty 14-gauge steel cabinets, vertical 1.25in (32mm) diameter coarse-threaded rods that allow the crosshead to quickly and easily adjust to the height for a variety of sample configurations.  These load frames are compatible with Karol Warner and many other manufacturers; Triaxial Cells, Load Cells, Load Rings, LVDT, and Dial indicators.  The versatile triaxial load frame units are also quickly adaptable to other popular soil testing applications by simply changing out minor components and accessories, making them a valuable resource in a lab that performs a wide array of soil strength tests.  Karol-Warner also offers Data Acquisition Software which records data and calculates results for unconsolidated-undrained (UU), consolidated-undrained (CU), consolidated-drained (CD), and unconfined compressive strength of soil samples.

• 7611 Load Frame has a 0.001 – 0.1in/min strain rate and 10,000lbf (44.5kN) load capacity is a great choice for smaller testing labs and universities that need to perform a variety of soil tests.
• 7621 Load Frame has a 0.0001 – 0.3in/min strain rate and 10,000lbf (44.5kN) load capacity has a micro-stepping drive controller and can achieve a 1000:1 strain rate using simple push-button settings.
• 7631 Load Frame has a 0.00001 – 0.29999in/min strain rate and 10,000lbf (44.5kN) load capacity and features the widest range of strain rates and a 10,000lbf capacity to accommodate different soil tests.
• 7731 Load Frame has a 0.00001 – 0.29999in/min strain rate and 20,000lbf (89kN) load capacity has the same broad range of strain rates as Model 7631 but features a 20,000lbf capacity.
• 7691 Load Frame has a 0.02 – 2in/min strain rate and 10,000lbf (44.5kN) load capacity has a sufficient range for a number of soil tests, and can also be used for Marshall Stability testing of hot-mix asphalt samples.

Visit our main Load Frames page to view our full line.