Method for testing semicircle bending number of asphalt mixture

A kind of asphalt mixture, numerical test technology, applied in the direction of testing material strength by applying stable bending force, preparation of test samples, etc., can solve the problem of lack of macro and micro mechanical behavior, so as to save research cost and improve test efficiency , the effect of improving performance

Active Publication Date: 2018-06-19
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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  • Method for testing semicircle bending number of asphalt mixture
  • Method for testing semicircle bending number of asphalt mixture
  • Method for testing semicircle bending number 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 method for testing semicircle bending number of an asphalt mixture, and relates to the technical field of traffic civil engineering. The method for testing the semicircle bending number of the asphalt mixture has the advantages that by testing the basic parameters and micro-mechanics parameters, building a simulation specimen on a PFC2D platform, and simulating the testingprocess, the manufacturing of a semicircle bending indoor test specimen is not needed, the testing efficiency is improved, and the study cost is reduced; after the method for testing semicircle bending number is applied into the analysis of mechanics characteristic of the asphalt mixture, the anti-cracking property of the asphalt mixture can be rapidly and accurately predicted, the macro-micro mechanics property change rule of the asphalt mixture is disclosed, and the technical problem of lack of one method for rapidly and accurately predicting the macro-micro mechanics behavior of the material in the semicircle bending indoor testing process of the asphalt mixture in the prior art is solved.

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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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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