Asphalt pavement reflection crack propagation analog experiment device

A technology for reflective cracks and asphalt pavement, applied in measurement devices, material inspection products, instruments, etc., can solve the problem of incompletely revealing the damage, fatigue and fracture mechanism of asphalt mixture, and cannot fully and truly reflect the formation and expansion of reflective cracks in pavement structures. and fracture laws, etc., to achieve the effect of facilitating the approximate simulation of coupled stress

Inactive Publication Date: 2008-05-14
CHANGAN UNIV
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Problems solved by technology

From the perspective of phenomenology, the influence of asphalt or interlayer materials on the crack resistance of the mixture is analyzed, and the difference in the crack resistance of the entire pavement caused by the change of pavement structure is not involved; from the perspective of mechanical approximation, the asphalt mixture is regarded as uniform The properties, elasticity, and isotropy of the asphalt mixture are analyzed, but the calculation results are quite different from the actual engineering. Therefore, neither of the two metho

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  • Asphalt pavement reflection crack propagation analog experiment device
  • Asphalt pavement reflection crack propagation analog experiment device

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Embodiment Construction

[0024] The invention mainly includes a temperature control box, an asphalt pavement simulation platform and a reflective crack tester placed in the temperature control box.

[0025] Referring to Figures 1 and 2, the asphalt pavement simulation platform includes a fixed test feeder 1 welded together with a feeder base 3, a guide rail 8 is provided on the base 3, a roller 6 is provided on the guide rail 8, and the movable test feeder 2 can be Through the roller 6 moving on the guide rail 8, the movable test material car 2 also has a connecting beam 7, so as to be connected with the horizontal transmission device. The fixed test material car 1 and the movable test material 2 are respectively provided with a material car baffle 4 and a baffle slot 5. When forming the road surface test structure layer, the material car baffle 4 is inserted into the material car baffle slot 5, and its height It can be adjusted according to the thickness of the pavement test structure layer 9 . Each...

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Abstract

The invention discloses a blacktop reflecting crack propagation analog experiment device which includes an environment box and a blacktop simulative platform and a reflecting crack propagation tester arranged in the environment box. The reflecting crack propagation tester includes a horizontal pulling fatigue test part, a vertical cutting fatigue test part and a data collecting part controlled by a microcomputer. The blacktop simulative platform includes a fixed testing vehicle (1) and a skip car frame (3) welded as a whole, and an active testing skip car (2) that can move horizontally on the skip car frame (3). The device can carry through pulling type and cutting type reflecting crack propagation expanding large scale dimension road structure experiment, analyze and compare the anti-crack effects of different blacktop structures or materials, acquire relevant calculating parameters and verify a theoretical calculating result, and provide a reliable testing basis for the blacktop structure design.

Description

technical field [0001] The invention relates to the crack resistance research field of highway engineering asphalt pavement, in particular to providing a simulation test device for reflecting crack expansion of asphalt pavement. Background technique [0002] Since the 1970s, the domestic and foreign road engineering circles have been very active in the research on reflective cracks in asphalt pavement. To understand the generation process of reflective cracks and to propose effective prevention measures are two core issues to solve reflective cracks. Therefore, the research on these two issues is the key to improve the durability of asphalt pavement. Although static analysis, fracture and damage mechanics, and finite element method provide a theoretical basis for the analysis of reflective cracks in asphalt pavement, due to the complexity of the pavement structure and the variability of material parameters, theoretical analysis alone cannot fully To solve the research topic...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N33/42
Inventor 王松根陈拴发马庆雷李祖仲郑木莲
Owner CHANGAN UNIV
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