Rut test system for asphalt mixture in hydrodynamic pressure environment and test method

Abstract

The invention provides a rut test system for an asphalt mixture in a hydrodynamic pressure environment and a test method, which belong to the technical field of road engineering material performance test. The system comprises a hydrodynamic pressure generating device, a wheel system loading device, an asphalt mixture sample fixing device and a temperature control water bath device. An external servo hydraulic system drives a piston to perform reciprocating movement along a vertical direction according to a preset frequency and an amplitude, a hydrodynamic pressure environment is formed, and the process of generating instantaneous hydrodynamic pressure when a vehicle tire quickly drives on an actual asphalt pavement can be effectively simulated. Constant wheel contact pressure is realized through setting of a linear bearing sliding sleeve, the rut depth is monitored in real time by adopting a form of fixing two ends of a displacement sensor, and the rut test for the asphalt mixture in the hydrodynamic pressure environment can be realized to evaluate the water damage resistance performance. The process of applying the vehicle load to the asphalt mixture in the hydrodynamic pressure environment can be realized, and the specific influences of the hydrodynamic pressure caused by the vehicle tire on the asphalt pavement can be more realistically simulated and quantitatively evaluated.

Description

technical field [0001] The invention relates to the technical field of performance testing of road engineering materials, in particular to a rutting test system and a test method for an asphalt mixture hydrodynamic pressure environment. Background technique [0002] The asphalt pavement is exposed to the natural environment. When the vehicle is driving in rainy weather, the positive and negative alternating cycle hydrodynamic pressure generated by the repeated extrusion and suction of the tire will cause the asphalt film to peel off from the surface of the aggregate, and eventually develop into loose, potholes. Water damage and other problems, resulting in reduced service performance and shortened service life of asphalt pavement. Different from the water damage process of asphalt mixture, which is different from the static water immersion and freeze-thawing forms required by the current regulations in my country, the damage mechanism of dynamic water pressure is more consis...

AI Technical Summary

Problems solved by technology

However, in this kind of rutting test method, limited by the conditions of the indoor test, the speed of the test wheel traveling back and forth is quite different from the actual speed of the vehicle on the asphalt road. The practical effect of hydrodynamic pressure is limited

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