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Testing device for compound type cracking of asphalt mixture

A technology for asphalt mixture and cracking test, which is applied in the direction of measuring device, analyzing material, and using stable tension/pressure to test material strength, etc., to achieve the effect of improving crack resistance, stable and reliable test results, and reasonable control of test conditions

Active Publication Date: 2013-09-04
SOUTHEAST UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the existing indoor test method for simulating the cracking of asphalt mixture, and to design and develop a test device and test method that can simulate the composite cracking of asphalt mixture, which is used to study the composite reflection of asphalt mixture. Cracking properties of cracks

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  • Testing device for compound type cracking of asphalt mixture
  • Testing device for compound type cracking of asphalt mixture
  • Testing device for compound type cracking of asphalt mixture

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Embodiment Construction

[0013] The asphalt mixture composite crack test device of the invention is suitable for measuring the mechanical properties of different composite cracks of the asphalt mixture at a specified temperature and loading rate and evaluating the anti-crack performance of different composite cracks of the asphalt mixture.

[0014] (1) Principle of device composition

[0015] The composite asphalt mixture cracking test device of the present invention is used to study the cracking characteristics of the asphalt mixture composite. The special design of the test device makes the test device rotatable, and the asphalt mixture test piece can be placed in different stress modes. Under this condition, the composite cracking mode of opening type (Type I) and shearing type (Type II) can be realized, so that the cracking behavior of asphalt mixture under different cracking modes of different composite type levels can be accurately simulated. With the rotation of the test fixture, the incision d...

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Abstract

The invention discloses a testing device for compound type cracking of an asphalt mixture, which is used for researching a compound type cracking characteristic of the asphalt mixture, and utilizes a special design of a testing device, so that the testing device has the rotatable performance; and an asphalt mixture test piece can be at different stressing modes to realize an opening type (type I) and a shearing type (type II) combined cracking mode, so that a cracking behavior of the asphalt mixture under cracking modes with different compound type levels can be accurately simulated. Along the rotation of a testing clamp, different angles can be formed in a notch direction and a tensile load direction of the asphalt mixture test piece, so that a compound type cracking test for compounding with different proportions can be obtained.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a test device for simulating composite cracking of asphalt mixture. Background technique [0002] The typical asphalt pavement structure in my country is a semi-rigid base asphalt pavement, and reflective cracks are one of the more common diseases. According to fracture mechanics, the propagation of cracks can be divided into three basic types: opening type, shearing type (in-plane shearing), and tearing type (out-of-plane shearing), respectively recorded as type I, type II, and type III . Aiming at the problem of reflective cracks in asphalt pavement, domestic and foreign scholars have done a lot of research on test conditions, test methods, material composition, load characteristics, and environmental factors. The indoor tests for simulating cracking of asphalt mixture abroad mainly include indirect tensile test, semicircular bending test, unilateral notched beam t...

Claims

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Application Information

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IPC IPC(8): G01N3/04G01N3/08
Inventor 倪富健高磊白安众李强
Owner SOUTHEAST UNIV
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