Two Point Trapezoidal Bending Beam Machine

Optimisation of the setting up time with intelligent software, and accurate temperature control with an integrated temperature cabinet.

Bending tests are widely used for measuring the stiffness modulus ans assessing the fatigue resistance of asphaltic paving materials. The two-point bending test on trapezoidal specimens is, arguably, the most repeatable and reproducible bending test method detailed in the revelant EN 12697 standards. In this test, the specimen is mounted as a vertical cantilever. The base is fixed and the top is moved sinusoidally with a constant displacement amplitude. The trapezodal specimens are tested simultaneously and stiffness are subjected to a constant strain amplitude at a selected frequency and temperature until the stiffness modulus decreases to a user-selected target level (normally 50 percent of its initial value).

The Two Point Trapezoidal Bending Beam Machine CRT-2PT performs these tests with excellence.

Key Uses Mixture design End product specification Assessment of new materials		Standards EN 12697-24 Annex A EN 12697-26 Annex A NF-P-98-260-2
Key Features Rigid test frame housed within temperature cabinet Temperature cabinet with fan assisted air circulation and glazed viewing door Temperature cabinet range -20 to 30ºC Machine designed to test two specimens simultaneously Frequency range from 0.1 to 35Hz Precise manual setting of strain amplitude Accurate pre-test displacement transducer adjustment using software feedback Two high-precision ±2.5kN fatigue rated piezoelectric force transducers High-speed control and acquisition system for interfacing to host computer User-friendly software for fatigue and stiffness modulus tests Software for automatically carrying out frequency sweeps		Software User friendly, intuitive and reliable Windows™ software developed using LabVIEW™ Specifically written to meet EN 12697-24 Annex A and EN 12697-26 Annex A One software package performs both fatigue and complex modulus testing The software allows a range of strain amplitudes and frequencies to be tested The operator is guided through setting up the samples and performing the test Real-time graphs show the force and the deformation as well as the relationship between rigidity and number of cycles Stored test data can be analysed and compared with other test data utilising a spreadsheet package Utilities are uncluded for transducer check, diagnostic routines and calibration

Calibration & Maintenance

Calibration, Annual Service and Maintenance Contracts are available for this device. UKAS accreditation to satisfy typed testing as described in EN 13108. Please enquire for further details.

Note: This device should be checked and calibrated annually.