Shear-Pull Test Device and Evaluation Method for Interlayer Bonding Performance of Asphalt Pavement
A technology of pull-out test and asphalt pavement, which is applied in the direction of measuring device, using mechanical device, and using stable shear force to test the strength of materials, etc., which can solve the problems of inability to accurately evaluate the bonding performance between layers of pavement structure
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Embodiment 1
[0046] Because in the prior art, the effect of horizontal force is rarely considered in the interlayer tensile strength test of pavement, and only a small number of researchers have considered the effect of horizontal force in the test, but the applied horizontal force is not directly Acting on the composite specimen, the upper and lower ends of the specimen are rigidly connected to the tie rod respectively, the specimen restricts its own horizontal movement under the action of tensile force, and the influence of the application of the horizontal force on the specimen is transferred to the tie rod. In view of this, the present invention designs a shear-pull test device for bonding performance under the composite stress state between layers of asphalt pavement.
[0047] like figure 1 As shown in the figure, the embodiment of the present invention provides a cutting-pull test device for bonding performance of asphalt pavement under composite stress state between layers, includin...
Embodiment 2
[0060] Based on the above-mentioned test device, the present invention also proposes an evaluation method for the shear-pull test of the bonding performance of the asphalt pavement under the composite stress state between layers, such as Figure 8 shown, including the following steps:
[0061] S1. Use a variety of methods to make molding specimens, and compare and verify the molding specimens made by different methods;
[0062] In the present invention, the indoor rotary compaction composite test piece is formed according to the specification. The diameter of the test piece is 150mm, and the height of the test piece can be controlled according to the needs and can be controlled according to the specific size of the fixture. In this test, the height of the composite test piece is 10cm.
[0063] S2. Comprehensively determine the shear threshold of the specimen based on the trial calculation of shear failure and the trial calculation of the horizontal load factor, including:
[...
Embodiment 3
[0082] In this example, on the basis of Example 2, the forming method of the test piece was changed, and the Marshall composite test piece and the field drilling core composite test piece were used to compare the interlayer working characteristics of the test pieces obtained by different forming methods. At the same time, on this basis, the study of the size effect was carried out, and the specimen with a diameter of 100mm was used, and the fixture with a diameter of 150mm was replaced by a fixture with a diameter of 100mm, and the change of the working characteristics between the layers of the specimen under different sizes was analyzed. .
[0083] Other operating procedures and specific technical solutions are the same as in Example 2.
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