An evaluation method for mechanical properties of asphalt mixture based on discrete element numerical simulation

By using discrete element numerical simulation and comprehensive evaluation methods, the problem of accuracy in evaluating the mechanical properties of asphalt mixtures was solved, and in-depth analysis of the microstructure of asphalt mixtures was achieved, thus improving the scientific nature and accuracy of the evaluation.

CN121997650BActive Publication Date: 2026-07-24INNER MONGOLIA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INNER MONGOLIA UNIV OF TECH
Filing Date
2026-01-19
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies are insufficient to reveal the microscopic evolution mechanism of the internal structure of asphalt mixtures, leading to inaccurate evaluation of mechanical properties and affecting road service life and maintenance costs.

Method used

The discrete element method was used to establish an initial discrete element model. The micromechanical properties parameters were obtained through a semi-circular bending test. The ideal solution ranking method and the objective weighting method were used for comprehensive evaluation to obtain the micromechanical properties of asphalt mixture.

Benefits of technology

It comprehensively and systematically reflects the mechanical properties of asphalt mixtures, avoids the one-sidedness of evaluation by a single index, improves the accuracy and scientific nature of the evaluation, and can more reliably reflect the true mechanical state of asphalt mixtures.

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Abstract

The present application provides a kind of based on discrete element numerical simulation asphalt mixture's mechanical property evaluation method, it is related to road material technical field, including: setting the unit radius and boundary unit radius of the component particle of the asphalt mixture to be measured, adjusting the distribution of component particle size and the contact model between different component particles, establish initial discrete element model;Based on the initial discrete element model, semi-circular bending test is carried out, and the mesoscopic mechanical property parameter of the asphalt mixture to be measured is obtained;The damage dimension parameter, the force transmission dimension parameter and the structure dimension parameter are determined by using ideal solution sequencing method, and the corresponding sub-index matrix of the structure dimension parameter, and the objective weighting method is combined to weight each sub-index matrix, and the comprehensive evaluation index is obtained by weighted fusion;Based on the comprehensive evaluation index, the mesoscopic mechanical property of the asphalt mixture to be measured is determined;The sub-index matrix includes damage sub-index, force transmission sub-index and structure sub-index.
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