Step erosion asphalt health test container and test method in hydrodynamic pressure environment

Abstract

The invention provides a step erosion asphalt health test container and a test method in a hydrodynamic pressure environment, belonging to the technical field of performance testing of road engineering materials. The container includes a base, a middle ring, a cover, bolts and nuts, which are connected, assembled and fixed sequentially from bottom to top, and multiple containers can be assembled in series to simultaneously carry out health preservation in a dynamic water pressure environment. The invention can directly split the asphalt into two parts along the depth direction and then conduct performance tests, study the step erosion process of asphalt from the outside to the inside under the hydrodynamic pressure environment and explore the mechanism of water damage, and at the same time propose the depth of the asphalt sample The recommended values ​​are used to provide reference for the research on asphalt water damage.

Description

technical field [0001] The invention relates to the technical field of performance testing of road engineering materials, in particular to a test container and a test method for step erosion of asphalt in a hydrodynamic pressure environment. Background technique [0002] When the vehicle is running on the asphalt road with surface runoff, the "squeeze-suction" effect of the tire driving water on the road surface will form a service environment of positive and negative alternating dynamic water pressure. Asphalt mixture is made by mixing basic raw materials such as aggregate and asphalt according to a certain proportion. The asphalt pavement is under dynamic water pressure environment for a long time, the asphalt film covering the surface of the aggregate will gradually peel off, and even the stones will be broken, and the vehicle tires will cause "threshing" or "white slurry", and finally there will be obvious water damage. , Seriously affecting the service quality and life...

AI Technical Summary

Problems solved by technology

The above traditional methods have certain limitations: (1) Since the water environment is gradually eroded from the surface of the asphalt to the inside, if the depth of the asphalt sample in the container is too large, it will lead to insufficient health of the underlying asphalt; (2) The traditional method is to evaluate the performance changes of the overall asphalt in the container. The important scientific issue of "the process of water environment gradually eroding asphalt from the outside to the inside" has not received enough attention and research. The overall performance test of the asphalt sample will not be able to distinguish between "separation, Different water damage mechanisms such as displacement, emulsification, scouring and water pressure"

For the technical parameters and test methods of the sample container for the water damage performance evaluation of asphalt materials, the current national regulations have not formed specific requirements and standard evaluation methods, so it is necessary to study this important scientific issue

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