Servo-Pneumatic Four Point Bend Apparatus Standalone MkIV

Description

Its beam cradle designed to subject asphalt beam specimens to four point bending with backlash free rotation and horizontal translation at all load reaction points. This new model is now designed to provide a range of precise strain measurement options – at top-center from floating beam (EN, Austroads), the neutral axis referencing the outer pivots (ASTM, AASHTO), or top-center referencing the outer pivots.

Controlling the Four Point Bend Apparatus Standalone is the Third Generation Integrated Multi-Axis Controls and Data Acquisition System (IMACS2) and UTS Neutron test application software.

The Four Point Bend Apparatus is of great benefit for your SuperPave and other performance-based testing programs for measuring stiffness & fatigue properties, characterizing mixtures and as inputs into sophisticated pavement design models.

Main Features

• Digital servo- pneumatic actuator provides accurate control of loading wave shape
• Includes both on-specimen and outer fixed reference point strain measurement capabilities
• Deflection can be measured at the neutral axis or at the top surface of the specimen.
• Backlash free rotation and translation on all load and reaction points
• Sinusoidal or haversine controlled stress loading
• Constant force motorized clamping with multiple preset force levels
• Non-linear regression data fitting ensures reliable determination of phase and modulus

Specifications

• Loading frequency: up to 60 Hz (load limitations apply at higher frequencies)
• Load capacity: up to 5 kN dynamic
• Optional on-specimen displacement transducers LVDT +/- 0.5mm, +/- 1mm or +/- 2.5mm

Specimen Dimensions

• Specimen sizes: Max height 70 mm, Max width 80 mm, Length from 380 mm to 500+ mm
• Accommodates typical 50 x 50 x 400 mm, 60 x 60 x 400 mm, 50 x 63 x 400 mm and 70 x 70 x 500 mm specimens

Loading Spans

• Inner span ≤118.5 mm to >140 mm
• Outer span ≤355.5 mm to >420 mm
• Yoke Alignment Tool 50 x 50 x 355.5 mm (H x W x Outer span centers) 70 x 70 x 420 mm (optional)

Dimension and weight

• Apparatus 600 x 230 x 490 – 560mm (H x D x W) / 35kg
• IMACS2 445 x 280 x 245 mm (H x D x W) / 11kg
• Air Accumulator 330 x 470 x 450mm (H x D x W) / 9.5kg

Services

• Air supply Clean, dry air at 800 – 900kPa
• Minimum flow rate 5 liter/sec

Ordering Information

Accessories