Testing method of evaluating erosion resistibility of road material under action of hydrodynamic pressure

Abstract

The invention belongs to the technical field of highway engineering asphalt pavement water damage and relates to a testing method of evaluating the erosion resistibility of a road material under the action of the hydrodynamic pressure. The testing method is characterized in that a formed standard specimen is put into a triaxial apparatus pressure chamber and is connected with each ventilation and water passing pipeline, the confining pressure and the axial pressure are applied, a frequency and pressure adjustable hydrodynamic pressure generator is started to carry out an erosion test on the specimen in the pressure chamber, and a triaxial single-axis test is immediately carried out on the eroded specimen after the test; multiple groups of specimen are selected, and the tests are repeatedly carried out on the specimens according to the times without needing erosion; test data is collated, and a rule that the road material strength or modulus continuously attenuates along with the erosion time is analyzed and summarized according to a test result. The testing method has the beneficial effects that according to the testing method disclosed by the invention, the repeated erosion action of different coupling types of water and load to the material can be simulated, the attenuation rule of the mechanical property of the road material under the combined action of the water and repeated load is analyzed and studied, and the theoretical support is provided for pavement structure design with long service life.

Description

technical field [0001] The invention belongs to the technical field of water damage to asphalt pavement of highway engineering, and relates to a test method for evaluating the anti-scouring ability of materials under the action of dynamic water pressure. technical background [0002] At present, there are many test methods for evaluating the water stability or water sensitivity of asphalt mixture. In foreign countries, there are generally the following two types: qualitative test with uncompacted loose asphalt mixture as the research object; quantitative test with asphalt mixture specimen or core sample as the research object. The former is mainly aimed at the interaction between coarse aggregate and asphalt, using visual observation or instrument inspection to subjectively evaluate the damage degree of the asphalt film coated on the aggregate surface, and based on this, it can be used to judge the adhesion between asphalt and aggregate and the water stability of the mixture...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a scour test method that can objectively simulate the stress environment of road materials, and solve the problem that the strength attenuation law of road materials cannot be analyzed and studied in scour tests

Images