Device and method for testing mechanical parameters of bumping diffusion process of bridge asphalt pavement

Abstract

The invention discloses a device and a method for testing mechanical parameters of bumping diffusion process of a bridge asphalt pavement, aiming at precisely testing the relationship of bumping deformation characteristic parameters of bridge pavement material and applied load, and calculating the interfacial fracture performance and destructive strain of bumps of different pavement systems. According to the technical scheme, the device comprises an environment box arranged on a support frame, wherein a test piece fixing mount is arranged in the environment box, and is connected to a pressurized oil cylinder through an output oil pipe, the pressurized oil cylinder is connected with an MTS fatigue testing machine and can press hydraulic oil into a test piece to generate load action; and a temperature and humidity sensor and a temperature and humidity generation controller are arranged in the environment box, and a camera capable of photographing the surface bumping deformation of the test piece is arranged at the top of the environment box, and is connected to an MTI-3D structural deformation measurement system capable of processing and analyzing the surface bumping deformation of the test piece.

Description

technical field [0001] The invention belongs to the technical field of bridge deck asphalt pavement disease prevention and control, in particular to a device and method for testing mechanical parameters of bridge deck asphalt pavement bulge diffusion process. Background technique [0002] In recent years, the construction of expressways has developed to mountainous areas, and the proportion of bridges in the route has been increasing. The prevention and treatment of bridge deck pavement diseases has become more important. With the application of new materials such as epoxy asphalt mixture in bridge deck pavement, cracks and permanent deformation diseases have gradually decreased, but bulging has increasingly become the most important disease type of bridge deck pavement, which has attracted widespread attention. The bridge deck pavement system usually consists of a waterproof bonded course on the bridge deck, a pavement underlayment and a pavement overlay. After the air or ...

AI Technical Summary

Problems solved by technology

In addition, after the bridge deck pavement bulges, it loses the bonding force of the bridge deck, and is gradually crushed under the action of the traffic load, which eventually leads to the collapse of the pavement layer and causes extensive damage

What is more serious is that after the bulge produces macroscopic cracks, moisture such as rainfall can directly contact the bridge deck through the cracks, which accelerates the corrosion or rust of the bridge, which not only seriously affects the service life of the bridge deck structure and the bridge deck pavement. The integrity and flatness of the installation increase the safety hazard

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