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Asphalt mixture virtual performance test prediction method based on mesoscale simulation

A kind of asphalt mixture and performance technology, applied in the field of road engineering, can solve the problems of time-consuming, unsatisfactory test results, etc., and achieve the effect of simplifying the acquisition test, reducing the comparative indoor test, and expanding the applicability

Active Publication Date: 2016-12-07
SOUTHEAST UNIV
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Problems solved by technology

[0002] Traditional asphalt mixture performance estimation requires a number of indoor tests, including: bending test, split test, fatigue test, rutting test, etc. These indoor tests are not only time-consuming but also affected by objective conditions such as test molding, cutting, and handling methods. , the test results are not satisfactory, especially when verifying whether the asphalt mixture design meets the specification requirements, if the requirements are not met, it is necessary to redesign and repeat the above indoor test

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  • Asphalt mixture virtual performance test prediction method based on mesoscale simulation
  • Asphalt mixture virtual performance test prediction method based on mesoscale simulation
  • Asphalt mixture virtual performance test prediction method based on mesoscale simulation

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Embodiment 1

[0059] Such as figure 1 As shown, the virtual performance test estimation method of asphalt mixture based on mesoscopic simulation includes the following steps:

[0060] (1) Design of initial asphalt mixture ratio: select the aggregate gradation curve, asphalt-stone ratio, and void ratio according to the design method of asphalt mixture ratio, and complete at least two schemes of initial asphalt mixture ratio design. The ratio design can be combined with four methods: Marshall mix ratio design method, Bailey method, main aggregate void filling method, and multi-stage gradation embedded extrusion method.

[0061] (2) Acquisition of basic material parameters: Determine the basic material parameters of the asphalt mixture according to the selected initial mix ratio, including: the passing percentage of each aggregate, asphalt ratio, void ratio, mineral powder content, aggregate density, and asphalt density , viscoelastic parameters of asphalt mortar, elastic modulus of coarse ag...

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Abstract

The invention discloses an asphalt mixture virtual performance test prediction method based on mesoscale simulation. The method comprises the steps of designing an initial mix proportion of an asphalt mixture, acquiring basic parameters of a material, carrying out a DSR test of asphalt mortar, carrying out a virtual creep test on the asphalt mortar, converting parameters in a virtual system, choosing multiple indoor tests needing to be predicted, constructing various three-dimension virtual test pieces, choosing a mechanic constitutive model of the material, choosing a loading condition of the virtual test, constructing a real-time monitoring system for test results, outputting final result prediction values of all the tests, comparing all indexes with standards to judge whether requirements are met, outputting suggesting to reselect a mix proportion if the requirements are not met, and outputting an optimal mix proportion if the requirements are met. According to the method, additional curves of the test results are monitored in real time, the obtained output results are compared to judge whether multiple performance indexes of the mixture to be predicted meet the standard requirements, unnecessary relative-property indoor tests are reduced, and test basis is provided for optimal design of the mix proportion of the asphalt mixture.

Description

technical field [0001] The invention relates to discrete element simulation technology of asphalt mixture, in particular to a virtual performance test estimation method of asphalt mixture based on mesoscopic simulation, and belongs to the technical field of road engineering. Background technique [0002] Traditional asphalt mixture performance estimation requires a number of indoor tests, including: bending test, split test, fatigue test, rutting test, etc. These indoor tests are not only time-consuming but also affected by objective conditions such as test molding, cutting, and handling methods. , the test results are not satisfactory, especially when verifying whether the asphalt mix design meets the specification requirements, if the requirements are not met, it is necessary to redesign and repeat the above indoor test. Therefore, it is necessary to take measures to simplify the tedious and repetitive work of the comparative performance verification test of asphalt mixtur...

Claims

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Application Information

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IPC IPC(8): G01N33/42
CPCG01N33/42
Inventor 马涛张垚黄晓明丁珣昊赵永利
Owner SOUTHEAST UNIV
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