A Numerical Test Method for Semicircular Bending of Asphalt Mixture

A kind of asphalt mixture, numerical test technology, applied in the direction of using stable bending force test material strength, test sample preparation, etc., can solve the lack of macro and micro mechanical behavior and other problems, to save research costs, improve performance, The effect of improving test efficiency

Active Publication Date: 2020-04-24
SHANDONG UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a semicircular bending numerical test method of asphalt mixture, which solves the lack of a convenient and accurate method for predicting the macroscopic and microscopic mechanical behavior of materials during the semicircular bending laboratory test of asphalt mixture in the prior art. technical issues of the method

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  • A Numerical Test Method for Semicircular Bending of Asphalt Mixture
  • A Numerical Test Method for Semicircular Bending of Asphalt Mixture
  • A Numerical Test Method for Semicircular Bending of Asphalt Mixture

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Embodiment

[0052] This example gives a semi-circular bending numerical test method of asphalt mixture, taking the aggregate produced in Shanxi Jinzhong and the asphalt produced by Nanjing Jinling Petrochemical as examples, the density of coarse aggregate, the density of asphalt mortar, and the density of asphalt mixture according to << Asphalt and asphalt mixture test regulations for highway engineering (JTG E-20-2011) "corresponding method test, the results are shown in Table 1; asphalt mixture ratio is shown in Table 2; micromechanical parameters passed the coarse aggregate elastic modulus test and asphalt mortar dynamic creep test, the results are shown in Table 3.

[0053] Table 1 Coarse aggregate density, asphalt mortar density and asphalt mixture density

[0054]

[0055] Table 2 asphalt mixture ratio

[0056]

[0057] Table 3 Micromechanical parameters

[0058]

[0059] The implementation steps of the semicircular bending numerical test method of asphalt mixture provide...

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Abstract

The invention provides a semicircular bending numerical test method of asphalt mixture, which relates to the technical field of traffic civil engineering. The semicircular bending numerical test method, by determining the fundamental parameters and micromechanical parameters in the PFC 2D The simulated specimens are built on the platform and the test process is simulated, without the need to make semicircular bending indoor test specimens, which improves the test efficiency and saves research costs; the application of the semicircular bending numerical test method in the analysis of the mechanical properties of asphalt mixture can be convenient, Accurately predict the crack resistance of asphalt mixture, reveal the change law of macroscopic and microscopic mechanical properties of asphalt mixture, and solve the lack of a convenient and accurate prediction of the macroscopic and microscopic mechanical properties of asphalt mixture in the laboratory test process of asphalt mixture. Technical aspects of the method of observing mechanical behavior.

Description

technical field [0001] The invention relates to the field of traffic civil engineering, in particular to a semicircular bending numerical test method of asphalt mixture. Background technique [0002] In the field of traffic civil engineering, crack resistance is an important road performance index of asphalt mixture. The semicircular bending indoor test is a widely used test method to predict the crack resistance of asphalt mixture. The basic principle and steps of the semicircle bending indoor test are as follows: (1) prepare the asphalt mixture cylinder specimen according to the target mix ratio; (2) cut the asphalt mixture cylinder specimen according to the size requirements of the semicircle bending specimen; (3) Carry out the semicircular bending loading test on the cut specimen; (4) Arrange the test results to obtain the contact force-displacement curve of the asphalt mixture. [0003] The traditional semicircular bending indoor test method has the following defects:...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/20G01N1/28
CPCG01N1/28G01N3/20
Inventor 任皎龙贾致荣张世义
Owner SHANDONG UNIV OF TECH
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