Asphalt pavement reflection crack propagation simulation test device provided with middle layer

Abstract

The invention discloses an asphalt pavement reflection crack propagation simulation test device provided with a middle layer. The asphalt pavement reflection crack propagation simulation test device comprises a case, an asphalt pavement simulation platform, a wheel load device and a temperature adjusting device. The asphalt pavement simulation platform comprises a base, a movable plate and a settlement plate are installed on the base, and a horizontal power device is installed on the movable plate. The wheel load device comprises a test wheel, a sliding device, a sliding rod, a connecting platform, a test wheel telescopic device, a loading test block and the like. The wheel load device is connected with the wheel load power device. According to the invention, a temperature type (open type)reflection crack is simulated in the horizontal direction; a load type (shearing type) reflection crack is simulated in the vertical direction; generation and expansion of actual reflection cracks ofthe semi-rigid base asphalt pavement are truly and closely simulated, the anti-cracking effects of different asphalt pavement intermediate layer materials are analyzed and compared, the types of theintermediate layer materials are reasonably selected, and the method has important significance in delaying the reflection cracks of the asphalt pavement and prolonging the service life of the pavement.

Description

technical field [0001] The invention relates to the field of research on reflective cracks of asphalt pavement with semi-rigid bases in road engineering, in particular to a simulation test device for expanding reflective cracks on asphalt pavement with an intermediate layer. Background technique [0002] The development and construction of highway transportation infrastructure is an important basis for national economic and social development. In recent years, my country's highway transportation has developed rapidly. According to statistics, more than 90% of the built highways are asphalt pavements, and in these asphalt pavements, the semi-rigid base is the main structural form. However, due to the characteristics of dry shrinkage and temperature shrinkage of semi-rigid materials, shrinkage cracks are prone to occur under the action of ambient temperature and humidity. Gradually expand from bottom to top, resulting in cracks at the bottom of the asphalt pavement, and then ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the semi-rigid base asphalt pavement reflective crack test in the prior art has many test consumables, long test period, and unstable test data. The purpose is to provide a simulation test of asphalt pavement reflective crack expansion with an intermediate layer device, which solves the problem of simple operation and reliable data of semi-rigid base asphalt pavement reflective crack test

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