Marshall Stability Load Frame, 20,000lbf

Marshall Stability Load Frame, 20,000lbf

The Marshall Stability Load Frame from Gilson is a versatile and powerful tool for asphalt mix design testing. Capable of handling a wide range of asphalt test methods, this load frame is designed to perform Marshall stability and flow tests, as well as many other asphalt tests that take advantage of its strain rate range and load capacity. These tests are typically performed at a strain rate of 2.0in (50.8mm) per minute.

Marshall stability and flow testing is a well-established method for measuring the plastic flow of asphalt paving mixtures. The Marshall Stability Load Frame can be used to perform a variety of tests, including:

Indirect Tensile Strength (IDT) or Lottman Test: This test evaluates moisture susceptibility and allows the calculation of tensile strength ratios (TSR), providing valuable information about the durability of asphalt mixtures in wet conditions.

Interlayer Shear Strength (ISS) Test: This test measures the shear strength of tack coats between asphalt layers, helping to ensure the structural integrity of multi-layer asphalt pavements.

Semicircular Bend (SCB) Test: This test determines the resistance to cracking and fracture energy of asphalt mixtures, providing insight into the long-term performance of asphalt pavements under load.

IDEAL-RT Test: This test determines the resistance to rutting, or rutting tolerance, of asphalt mixtures, which is a key factor in the longevity of asphalt pavements.

All asphalt load frames from Gilson are powered by heavy-duty direct drive motors with overlimit switches to prevent movement beyond the 3in (76.2mm) range. The large 8in (203.2mm) diameter test platens and threaded adjustable crossheads can easily accommodate a variety of test fixtures, while the sturdy, 16ga powder-coated steel cabinets are built to withstand rugged use in lab environments.

This particular model, the 20,000lbf Marshall Stability Load Frame, features a fixed strain rate of 2.0in/min (50.8mm/min) and is powered by a 1hp DC motor and controller for precise strain rate control. It has a daylight opening of 11.9x19.5in (302.3x495.3mm) to accommodate a wide range of asphalt test fixtures and operates at 200-240V, 50/60Hz. The consistent loading rate is maintained at ±1% by the motor and controller, and the easily changeable crosshead with adjusting nuts allows for quick and easy setup. Flexible boots protect precision loading screws from debris, ensuring long-term accuracy and reliability.

Features:

• Consistent loading rate maintained at ±1% by the 1hp DC motor and controller
• Easily changeable crosshead with adjusting nuts
• Flexible boots protect precision loading screws from debris
• Large 8in (203.2mm) diameter test platens
• Threaded adjustable crossheads accommodate a variety of test fixtures
• Sturdy, 16ga powder-coated steel cabinets for rugged lab use

Included Items:

• Marshall Stability Load Frame (20,000lbf capacity)
• 8in (203mm) diameter lower platen

Specifications:

• Load Capacity: 20,000lbf (89kN)
• Motor: 1hp DC Motor
• Frame Opening Dimensions: 11.9x19.5in (302.3x495.3mm)
• Electrical: 200-240V, 50/60Hz, 6.5 Amps, 1,300 Watts
• Product Dimensions: 18x29x54.5in (457.2x736.6x1,384.3mm), WxDxH
• Estimated Shipping Weight: 250.0lb (113.40kg)

Meets Standards: AASHTO T 283, AASHTO T 245, ASTM D5581, ASTM D6927, ASTM D6931, ASTM D8044, AASHTO R 68, AASHTO TP 114, ASTM D4867/4867M, AASHTO T 393, ASTM D8360