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Method for testing moisture distribution of asphalt mixture based on industrial computed tomography (CT)

A technology for asphalt mixture and distribution testing, which is applied in the direction of material analysis using radiation, etc., can solve the problem that the moisture distribution of asphalt mixture cannot be intuitively and accurately obtained, so as to avoid indistinguishability, improve analysis accuracy, and improve durability The effect of sex and usability

Active Publication Date: 2014-02-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing method for testing the moisture distribution of asphalt mixture cannot intuitively and accurately obtain the law of moisture distribution, and to provide a method for testing the moisture distribution of asphalt mixture based on industrial CT

Method used

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  • Method for testing moisture distribution of asphalt mixture based on industrial computed tomography (CT)
  • Method for testing moisture distribution of asphalt mixture based on industrial computed tomography (CT)
  • Method for testing moisture distribution of asphalt mixture based on industrial computed tomography (CT)

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specific Embodiment approach 1

[0031] Specific implementation mode 1: This implementation mode is based on the industrial CT-based asphalt mixture water distribution test method according to the following steps:

[0032] 1. Fix the foam jig to the support table of the industrial CT machine, so that the vertical axis of the jig coincides with the rotation axis of the support table of the industrial CT machine;

[0033] 2. Cover the X-ray exit position of the industrial CT machine with a metal sheet, start the industrial CT machine, warm up the industrial CT machine, and place the cylindrical dry asphalt mixture test piece in the fixture to ensure that the asphalt mixture When the test piece is within the receiving range of the detector, record the position coordinates of the asphalt mixture test piece;

[0034]3. Adjust the scanning parameters of the industrial CT machine. Set the scanning parameters to a voltage of 140-220kV, a current of 60-140μA, a number of rotating surfaces of 1500, an exposure time of ...

specific Embodiment approach 2

[0045] Embodiment 2: This embodiment differs from Embodiment 1 in that the gradation type of the asphalt mixture specimen is asphalt concrete AC, asphalt mastic macadam SMA, asphalt macadam AM or drainage asphalt wear layer OGFC. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0046] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that step 2 puts a metal sheet on the X-ray emission exit position of the industrial CT machine, and the metal sheet is a tin sheet or a copper sheet. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for testing the moisture distribution of an asphalt mixture based on industrial computed tomography (CT), relates to a testing method for the internal moisture distribution of the asphalt mixture, and aims to solve the problem that a moisture distribution law cannot be intuitively and accurately acquired through an existing method for testing the moisture distribution of the asphalt mixture. The method for testing the moisture distribution of the asphalt mixture comprises the following steps: fixing a clamp made of a foam material onto an industrial CT machine supporting table; covering an X-ray outlet with a metal sheet; starting an industrial CT machine; placing a dry test piece into the clamp; debugging scanning parameters of the industrial CT machine; scanning the test piece, performing image reconstruction on a scanning result through software; analyzing size parameters of the test piece; soaking the dry test piece in water; performing image reconstruction and parameter analysis on the scanning result again; and setting an addition area of a non-clearance substance as a moisture distribution area so as to complete testing of the moisture distribution of asphalt. By virtue of the testing method, the moisture distribution can be visualized, and the measurement accuracy is improved.

Description

technical field [0001] The invention relates to a test method for the internal moisture distribution of asphalt mixture, in particular to an industrial CT-based test and analysis method for the internal moisture distribution of asphalt mixture. Background technique [0002] As a seamless continuous pavement, asphalt pavement has the advantages of good continuity, smooth and comfortable driving, low noise, no dust, convenient maintenance, and easy recycling, so it occupies a dominant position in the construction of high-grade highways. For example, asphalt pavement accounts for more than 90% of the highways in the United States and Japan, and about 80% of the roads in the world are asphalt pavements. With the widespread use of asphalt pavement, the problem of its early damage has become increasingly prominent. Based on extensive investigations into the problem of asphalt pavement damage, road workers have found that most of the early damage to asphalt pavements is water rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04
Inventor 谭忆秋姚形傲徐慧宁许聪张红许振宇任俊达邢超龚湘兵
Owner HARBIN INST OF TECH
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