Bituminous mixture performance testing method and system based on triaxial numerical experimentation

Abstract

The invention discloses a bituminous mixture performance testing method and system based on triaxial numerical experimentation. The bituminous mixture performance testing method comprises the steps that experimental parameters are obtained; the experimental parameters comprise aggregate density, a mineral aggregate gradation, bituminous mixture density and a bituminous mixture porosity factor; simulated bituminous mixtures are generated; an initial bituminous mixture triaxial numerical experiment model is generated according to the experimental parameters and the bituminous mixtures; a mechanical model between the bituminous mixtures in the initial bituminous mixture triaxial numerical experiment model is built, and a bituminous mixture triaxial numerical experiment model is generated; andthe triaxial numerical experimentation is carried out for the bituminous mixture triaxial numerical experiment model, the shearing strength of the bituminous mixtures is calculated, and the testing of the bituminous mixture performance is finished. According to the bituminous mixture performance testing method and system based on the triaxial numerical experimentation, the testing of the bituminous mixture performance can be finished rapidly and accurately.

Description

technical field [0001] The invention relates to the field of asphalt mixture performance testing, in particular to an asphalt mixture performance testing method and system based on a triaxial numerical test. Background technique [0002] In order to improve the rutting of asphalt pavement and improve its shear dilation resistance, road workers have proposed many evaluation methods aimed at improving the high temperature stability of asphalt pavement, such as Marshall test, triaxial compression test, uniaxial loading test, uniaxial penetration test, etc. into the test, etc. Among them, the triaxial compression test is the closest to the three-phase stress state of the asphalt pavement under the action of the vehicle load, and can obtain the shear strength parameters of the asphalt mixture. However, it is necessary to purchase expensive test equipment through indoor tests. Considering the error of the test, a large number of repetitive tests are usually carried out, which red...

AI Technical Summary

Problems solved by technology

However, it is necessary to purchase expensive test equipment through indoor tests. Considering the error of the test, a large number of repetitive tests are usually carried out, which reduces the efficiency of scientific research. Repeated tests are performed, and it is impossible to observe the destruction process of the test piece from the mesoscopic level. Stress transfer path, crack propagation law and aggregate migration path are also difficult to reveal the influence of material mesostructure on the mechanical properties of specimens

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