Four Point Bend Test for UTM, AST Pro and AsphaltQube

Description

Four Point Bend Jig

• Innovative “floating straight-edge” on specimen transducer displacement measurement eliminates errors
• Optional fixed point strain measurement referring from outer pivots
• Designed to subject an asphalt specimen to four point bending with backlash free rotation and horizontal translation of all load and reaction points
• Sinusoidal or haversine controlled strain or controlled stress loading
• Controlled force, motorized specimen clamping
• Non-linear regression data fitting ensures reliable determination of phase and modulus
• Can be used with existing UTM or AsphaltQube systems
• Cost effective solution for high volume testing
• Specimen laterally positioned by hand using etched lines as visual guide for two specimen sizes, nominally 50 and 63.5 mm in width
• Vertical clamping of the specimen is achieved by servo-motor driven ball screws, which are operated continuously during the test to take up the compliance of the specimen at the clamping surfaces

Extra Large Four Point Bend Jig

• Innovative floating on-specimen transducer eliminates errors caused by frame compliance
• Backlash free rotation and translation on all load and reaction points
• Controlled force and motorized specimen clamping
• Specimen rollers with pneumatic lift and lowering for easy loading of specimen
• Automated self-aligning specimen yokes for easy specimen insertion
• Specimen roller with pneumatic lift and lowering provide the user with easy test set-up across a range of extra-large specimen sizes
• Vertical clamping of the specimen is achieved by servo-motor driven ball screws, which are operated continuously during the test to take up the compliance of the specimen at the clamping surfaces

Technical Specifications

• Specimen size (h x w x l): 70 (max) x 80 (max) x 450 mm (max)
• Yoke alignment tool for specimen: 50 x 50 x 355.5 mm (h x w x outer span centers), 70 x 70 x 420 mm (h x w x outer span centers)
• Dimensions (h x w x d): 455 x 460 x 230 mm
• Weight: 35 kg

Extra Large Four Point Bend Jig

• Dimensions (h x d x w): 790 x 435 x 890 mm
• Weight: 210 kg
• Load capacity: up to 25 kN dynamic
• Specimen size (l x h x w): 790 (min) x 100-160 x up to 200 mm
• Yoke alignment tool for specimens: 740 mm (outer span centers), 247 mm (inner span centers)
• Air supply: clean, dry air at 700 kPa (specimen loading only)

Ordering Information

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