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

Abstract

The invention discloses a large horizontal force shear test device for an airport pavement seal coat, which comprises a UTM testing machine and is characterized by further comprising a cement concrete plate, an epoxy asphalt sand fog seal coat, an epoxy binder and a metal plate. The metal plate and the cement concrete plate-epoxy asphalt sand fog sealing layer are bonded and fixed into a three-layer structure test piece by the epoxy binder; the three-layer structure test piece is clamped and fixed by a left chuck and a right chuck on a fixing frame of the UTM machine, and vertical stress is applied by a 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...

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.

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