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Test method and apparatus for simulating actual pavement cracking through crack

A technology of reflection cracks and test devices, which is applied in the direction of applying repetitive force/pulsation force to test the strength of materials, can solve problems such as differences, and achieve the effects of high data accuracy, increased convenience, and easy operation.

Inactive Publication Date: 2012-03-28
CHANGAN UNIV
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Problems solved by technology

The phenomenological method analyzes the influence of asphalt on the anti-crack performance of the mixture, and does not involve the difference in the anti-crack performance of the entire pavement caused by the change of the pavement structure; the mechanical approximation method analyzes the crack propagation law of the asphalt mixture, but the calculation results are not consistent with the actual engineering conditions. big difference
It can be seen that these indoor test methods cannot truly reflect the formation, expansion and fracture of pavement structure reflective cracks

Method used

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  • Test method and apparatus for simulating actual pavement cracking through crack
  • Test method and apparatus for simulating actual pavement cracking through crack
  • Test method and apparatus for simulating actual pavement cracking through crack

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0031] Reference figure 1 , figure 2 , A test device for simulating actual road cracking through reflection cracks, including environmental box 3, data acquisition system 6, testing machine 7, measurement system 8, and asphalt pavement simulation platform 9. The test piece 2, the testing machine 7, the measurement system 8, and the asphalt pavement simulation platform 9 are all located in the environmental box 3. The testing machine 7 is connected to the asphalt pavement simulation platform 9 for loading, and the measurement system 8 is connected to the asphalt simulation platform 9 Used to measure the deformation parameters in the test. The measurement system 8 is connected to the data acquisition system 6 for collecting test data.

[0032] The measurement system 3 includes a temperature sensor, a force sensor, and a time deformation observer.

[003...

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Abstract

The invention discloses a test apparatus for simulating actual pavement cracking through cracks. The apparatus comprises a testing machine (7), a measure system (8), an environment case (3), a data acquisition system (6) and a bituminous paving simulation platform (9) arranged in the environment case (3). Meanwhile, the invention provides a test method for simulating actual pavement cracking through cracks. The invention has characteristics of simple operation and high data accuracy, and is suitable for the technical field of crack resistance research on bituminous paving of road engineering.

Description

Technical field [0001] The invention belongs to the technical field of research on crack resistance of asphalt pavement in highway engineering, and relates to a test method and device for simulating actual pavement cracking through reflection cracks. Background technique [0002] Reflective cracks refer to cracks in the road base layer before the surface layer and reflect the cracks in the base layer to the surface layer. Under the combined action of temperature and humidity cyclic stress and load repeated stress, the cracks and initial defects in the base layer produce stress concentration at the bottom of the surface layer, which firstly causes the bottom of the surface layer to crack, and then gradually expands from the bottom of the surface layer, and finally makes the cracks penetrate the entire surface layer. , The formation of reflective cracks. Reflective cracks cause serious damage to the integrity and continuity of the pavement structure and weaken the strength of the ...

Claims

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Application Information

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IPC IPC(8): G01N3/32
Inventor 汪海年尤占平郝培文马骉张琛
Owner CHANGAN UNIV
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