Name: Large Hydraulic Four Point Bending Machine
SKU: CRT-LH4PT-BB
Availability: InStock

The only machine on the market to accept variable beam lengths

Bending tests are widely used for measuring the stiffness modulus and assessing the fatigue resistance of asphaltic paving materials. The Large Hydraulic Four Point Bending Beam Machine uses advanced servo-hydraulic technology and a high-speed digital data acquisition and control system together with user-friendly software. During testing both graphical and tabular data are displayed on screen and test data is stored to disc in Microsoft Excel™ compatible format. The test frame is housed in a Temperature Controlled Cabinet with fan-assisted air circulation and a temperature range of -20 to 30°C. The unique constant torque clamping and three-transducer deflection measurement system of the
The Large Hydraulic Four Point Bending Beam Machine can be configured to accept different beam sizes. This means that the ratio between beam dimensions and maximum aggregate size of test specimens will satisfy the requirements of the relevant European specifications.

Standards

EN 12697-24 Annex D
EN 12697-26 Annex B
ASTM D7460
AASHTO T321

Key Features

Performs tests according to EN 12697-24 Annex D, EN 12697-26 Annex B, ASTM D7460 and AASHTO T321
Advanced software allows the user to build and modify test routines for research-level testing
Frequency range 0.1 to 60Hz
High-quality servo-hydraulic four-point bending machine
Double acting fatigue rated hydraulic actuator with integral stroke transducer
Star servo valve with ‘Sapphire Technology’
Can be used with simple one or research level three LVDT transducers
Accepts various beam sizes: 380 to 660mm in length and 50 x 50mm to 100 x 100mm cross-section
Integral Temperature controlled cabinet
Covered for noise reduction
Sinusoidal controlled strain or controlled stress fatigue test modes
User defined wave shapes can be used to simulate different types of vehicles
Advanced software allows the user to run EN, ASTM and AASHTO analysis concurrently
Multistage and multi frequency sequences for Master Curves
Relaxation periods can be programmed – for the investigation of healing
Camera can be triggered by software for crack initiation and propagation analysis
Save full-wave data for any or every cycle for hysteresis analysis
Constant torque motorized specimen clamping to eliminate errors due to localized beam indentation
Supplied with a certificate of calibration
Manufactured in the United Kingdom
We (Cooper) are the only manufacturers of Large Hydraulic Four Point Testing machines in the world

Key Uses

Mix design
End product specification
Assessment of new materials

Software

User friendly, intuitive and reliable Windows™ software developed using LabVIEW™
The user interface can be translated into the user’s preferred language – please enquire
One software package performs both fatigue and complex modulus testing
Stored test data can be analysed and compared with other test data utilising a spreadsheet package
Utilities are included for curve fitting of acquired data; testing of system’s inputs and outputs; phase correction and a transducer database for storing calibration factors

Accessories

Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.

CRT-PVC-BEAMLARGE	PVC Dummy Specimen 100x100mm
CRT-LH4PT-COMPAIR	Integrated Compressed Air Option

Specifications

Technical specifications are subject to change without notice.

Force Transducer	±10 kN
Specimen Transducer Range mm	3 x ±1
Actuator stroke mm	10
Frequency Hz	0.1 to 60
Temperature (Integral Cabinet)	-20 to 30°C
Electrical Supply¹	3 Phase 415 Volts 50 Hz @ 16A
Compressed Air	7–10 bar @ 100 L/min (optional integral extra)
Dimension mm (W x D x H)	1050 x 1600 x 2100
Working space required mm (WxDxH)	2050 x 2600 x 2300
Weight (approx.) Kg	1200
PC	Included