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Large horizontal force shear test device and test method for airport pavement seal

A shear test and horizontal force technology, applied in the direction of using a stable shear force to test the strength of materials, measuring devices, instruments, etc., can solve the problems of peeling, restraint, insufficient anti-skid performance, etc., to reduce test errors and improve. The effect of accuracy

Active Publication Date: 2022-04-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ①Direct shear tester: a large bending moment is generated at the bonding layer, and it cannot be guaranteed that the interlayer failure is completely caused by shear failure;
[0006] With the continuous growth of air traffic, under the long-term effects of load and environment, more and more airport cement pavements have insufficient anti-skid performance, which brings hidden dangers to the safe operation of airports.
As a preventive maintenance technology, the sand mist seal has a good treatment effect on the insufficient skid resistance of the airport pavement, but the spalling problem that occurs before the service life is reached in actual engineering has become the key to restricting the promotion of this technology
It is necessary to accurately evaluate the adhesion of the seal layer. In terms of evaluating the influence of the seal layer by large horizontal forces, there is currently no large-scale force shear test for the complex force of the airport pavement seal layer and the special environment of the airport. Concentrate on new and old pavement overlay, airport pavement "white plus black" and other interlayer bonding tests
[0007] The thickness of the seal layer is very thin. According to the previous test method, it cannot be guaranteed that the measured interlayer shear is generated between the cement pavement and the seal layer. The test has a large error and cannot correctly evaluate the adhesion of the seal layer.

Method used

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  • Large horizontal force shear test device and test method for airport pavement seal
  • Large horizontal force shear test device and test method for airport pavement seal
  • Large horizontal force shear test device and test method for airport pavement seal

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Embodiment Construction

[0038] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0039] Such as figure 1 As shown, the present embodiment provides a large horizontal force shear test device for the airport pavement seal, which mainly includes a fixed frame 1, a cement concrete slab 3, an epoxy asphalt sand mist seal 4, an epoxy adhesive 5, a load Collet 2 and metal plate 6.

[0040] The epoxy adhesive 5 uses epoxy resin AB superglue, and the epoxy resin AB superglue respectively bonds and fixes the metal plate 6 and the cement concrete plate 3-epoxy asphalt sand mist seal layer 4 to form a three-layer structure specimen.

[0041] The fixed frame 1 includes left and right fixed brackets, and the left and right fixed brackets are respectively provided with fixed chucks, and the three-layer structure specimen is fixed by the left and right fixed bracket chucks of the fixed frame. Both the fixing frame 1 and the load chuck in...

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Abstract

The invention discloses a large horizontal force shear test device for an airport pavement sealing layer, which includes a UTM testing machine, and is characterized in that it also includes a cement concrete board, an epoxy asphalt sand mist sealing layer, an epoxy adhesive and a metal plate. The epoxy adhesive bonds and fixes the metal plate and the cement concrete plate-epoxy asphalt sand mist seal into a three-layer structure specimen; Fasten and fix, and the vertical stress is applied by the load chuck of the UTM machine.

Description

technical field [0001] The invention relates to a large horizontal force shear test method for an airport pavement sealing layer, and belongs to the technical field of performance testing of an airport pavement sealing layer. Background technique [0002] At present, there is no instrument specifically for the shear force of the airport pavement seal layer, mainly for the shearing instrument of the interlayer bonding material of the highway pavement, mainly including three types of direct shear, torsion, and oblique shear test instruments. The direct shear tester uses one end of the test piece to be fixed, and a force parallel to the plane of the bonded layer is applied to the other end to test the shear strength of the bonded layer; the torsion tester, by fixing one end of the test piece, applies a torque to the other end The shear strength test is completed in the same way; the oblique shear tester is different from the direct shear tester in that it has an oblique bonding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/24G01N3/02
Inventor 高磊吉雪柯世堂张叶邓行宽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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