Pitch rotational shear oscillation fatigue rupture experimental device and method

Abstract

The invention discloses a pitch rotational shear oscillation fatigue rupture experimental device and a method and belongs to the field of pitch material tests. The pitch rotational shear oscillation fatigue rupture experimental device is composed of an experimental device, a loading system, a temperature control system and a computer control system. The computer control system is capable of controlling the temperature control system to conserve pitch test specimen and control temperatures of an experimental process. In the experimental process, the computer control computer is capable of controlling the loading system to carry out dynamic rotation shear load to the pitch test specimen. The pitch rotational shear oscillation fatigue rupture experimental device is capable of automatically controlling temperatures, big in stress than range and has multiple oscillation function. The pitch rotational shear oscillation fatigue rupture experimental device can also be suitable for determining asphalt cement complex shear modulus (G*) and phase angles (8).

Description

technical field [0001] The invention belongs to the field of testing mechanical properties of asphalt, and in particular relates to an experimental measurement technology for asphalt rotational shear vibration fatigue damage performance. Background technique [0002] The experimental equipment for testing the mechanical and pavement performance of asphalt binder by applying oscillating shear is mainly the dynamic shear rheometer (DSR), which measures the linear viscoelasticity of asphalt binder at a given temperature and loading frequency. The complex shear modulus (G * ) and phase angle (δ), which are used to evaluate the high temperature resistance to permanent deformation and medium temperature fatigue damage performance of asphalt binder. DSR is a high-end imported equipment. Although it is advanced in technology, it is very expensive and has little popularity, which directly affects the in-depth research on the dynamic performance of asphalt. Generally, the torque ran...

AI Technical Summary

Problems solved by technology

The above-mentioned torsion test equipment is not suitable for the test of the rotational (ie torsion) shear oscillation fatigue failure performance of asphalt binder. None of the material torque testing machines has this function; (2) The fatigue failure performance of asphalt binder is not only affected by the loading frequency and loading amplitude, but also very sensitive to the experimental temperature. Therefore, the performance test of asphalt binder must strictly control the loading (3) Compared with the existing material torsion test machine, the torque range suitable for asphalt binder rotational shear oscillation test is relatively small, so the experimental accuracy of the existing material torsion test is difficult to guarantee; ( 4) Due to the low hardness of asphalt materials, special fixtures must be used for shear loading experiments

[0004] In order to overcome the lack of general experimental equipment for testing the shear oscillation fatigue failure performance of asphalt binder in the prior art, the present invention provides an asphalt rotational shear oscillation fatigue failure test with automatic temperature control, large stress ratio range and multiple oscillation functions Performance test experimental device

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