Testing device for anti-erosion performance of pavement base material and testing method

Abstract

The invention discloses a testing device for the anti-erosion performance of a pavement base material and a testing method. The testing device is characterized in that a double-layer cylindrical transparent plastic drum is arranged on a vibrating platform; four pipes capable of adjusting the water feeding pressure are arranged at the periphery of an erosion barrel so as to pressurize water in the erosion barrel and provide pressure for water flow; the inner wall of the drum is circumferentially and vertically provided with adjustable-direction water spraying nozzles; the end parts of the water spraying nozzles are provided with positioning devices, testing time-rotating direction programming is carried out on a positioning system, and the erosion action of raindrops on the material is simulated by computer-program control. The up-down movement of a pressing rod is guaranteed by arranging up-down movement of an arranged pneumatic piston, a spring is compacted and impacted by the pressing rod, the compressing and impacting force directly act on a pressing plate and a rubber plate to simulate the instantaneous impacting action of an automobile hub on the material, and the size of the impacting force of the automobile hub on the pavement material is simulated by adjusting the moving amplitude of the pneumatic piston. The indexes for evaluating the anti-erosion performance comprise the percent of an erosion material in the total mass and the percent of the strength of the eroded test piece and the strength of the original test piece. The testing device and the testing method are worth of being promoted.

Description

technical field [0001] The invention relates to an anti-scour performance test device and test field of pavement base materials, in particular to a test device and a test method for the anti-scour performance of cement-stabilized, lime-stabilized, and lime industrial waste slag-stabilized inorganic binder-stabilized bases. Background technique [0002] At present, the main factors of pavement base damage in my country are vehicle overweight load and water damage, especially for pavement base semi-rigid materials. Water enters the pavement base and vehicle loads generate high-pressure hydrodynamic pressure under the instantaneous load of the pavement base, resulting in micro-damage of the base material. , the long-term load action causes the strength between the pavement base materials to be damaged, and the base bearing capacity is insufficient, and the corresponding pavement position gradually appears in the form of damage. Therefore, the joint action of the pavement base mat...

AI Technical Summary

Problems solved by technology

[0005] CN102183452B proposes factors such as scouring dynamic water pressure, scouring times, scouring frequency, and scouring angle to scour materials. The considerations are comprehensive but there are deficiencies, and there is no more realistic simulation of water scouring simulation effects on materials.

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