Asphalt pavement interlayer cohesiveness cutting-drawing test device and evaluation method thereof
A technology for asphalt pavement and pull-out test, which is applied in the direction of measuring device, using mechanical device, and applying stable shear force to test the strength of materials, etc.
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Embodiment 1
[0046] Due to the fact that in the prior art, the effect of horizontal force is rarely considered in the interlayer tensile strength test of pavement, only a small number of researchers have considered the effect of horizontal force in the test, but the applied horizontal force has not directly Acting on the composite specimen, the upper and lower ends of the specimen are rigidly connected to the tie rods respectively, the specimen limits its own horizontal movement under the action of tension, and the influence of the horizontal force on the specimen is transferred to the tie rods. In view of this, the present invention designs a cutting-pull test device for cohesive performance under composite stress state between layers of asphalt pavement.
[0047] Such as figure 1 As shown, the embodiment of the present invention provides a cutting-pull test device for cohesive performance under the composite stress state between asphalt pavement layers, including a specimen mold and a ho...
Embodiment 2
[0060] Based on the above-mentioned test device, the present invention also proposes a method for evaluating the bonding performance of the asphalt pavement under the composite stress state of the shear-pull test, such as Figure 8 shown, including the following steps:
[0061] S1. Make molding test pieces in various ways, and conduct comparative verification analysis on the molding test pieces made in different ways;
[0062] According to the specification, the present invention carries out indoor rotary compaction composite test piece molding, the test piece diameter is 150mm, and the test piece height is controlled according to the needs, and can be controlled according to the specific size of the fixture. In this test, the composite test piece height is 10cm.
[0063] S2. Comprehensively determine the shear threshold of the specimen based on the shear failure trial calculation and the horizontal load coefficient trial calculation, including:
[0064] S21. First test the i...
Embodiment 3
[0082] In this example, on the basis of Example 2, the forming method of the test piece is changed, and the Marshall composite test piece and the on-site core drilling composite test piece are used to compare the interlayer working characteristics of the test piece obtained by different forming methods. At the same time, on this basis, the size effect is studied again, and the specimen with a diameter of 100mm is used instead, and the fixture with a diameter of 150mm is replaced with a fixture with a diameter of 100mm, and the change of the interlayer working characteristics of the specimen under different sizes is analyzed. .
[0083] Other operation process and concrete technical scheme are all identical with embodiment 2.
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Abstract
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