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Analysis method for three-dimensional visual structure of asphalt mixture based on 3D printing

A technology of asphalt mixture and analysis method, which is applied in the direction of material analysis, analysis materials, and measurement devices using wave/particle radiation, which can solve the problems of breakthrough in printing process, high cost, and limited types of printing materials, etc., and achieve printing The effect of precise and efficient process and high geometric similarity

Pending Publication Date: 2020-05-19
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many technologies that need to be improved, such as high printing and manufacturing costs, limited types of printing materials, and breakthroughs in printing processes.

Method used

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  • Analysis method for three-dimensional visual structure of asphalt mixture based on 3D printing
  • Analysis method for three-dimensional visual structure of asphalt mixture based on 3D printing
  • Analysis method for three-dimensional visual structure of asphalt mixture based on 3D printing

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment is an analysis method based on the 3D visualization structure of 3D printed asphalt mixture, and its process is as follows figure 1 shown, including the following steps:

[0034] S1, making asphalt mixture test specimens indoors; asphalt mixture test specimens include but not limited to Marshall test specimens and / or rotary compaction test specimens.

[0035] Marshall test piece Standard test piece (double-sided compaction 75 times): a cylinder with a diameter of 101.6mm×63.5mm, suitable for standard Marshall test and indirect tensile test;

[0036] Rotary compaction test piece: The sample diameter is 150mm or 100mm, suitable for measuring the physical and mechanical properties of asphalt mixture.

[0037] S2, CT scan the asphalt mixture specimen to obtain continuous two-dimensional tomographic images; when CT scanning the asphalt mixture specimen, set the scanning interval, and scan continuously along the longitudinal direction of the asphalt mixture s...

Embodiment 2

[0054] In this embodiment, an analysis method based on the 3D visualization structure of 3D printed asphalt mixture includes the following steps:

[0055] S1. According to the asphalt mixture gradation required for mechanical tests, make a standard Marshall test piece for indoor testing. The compaction standard is double-sided compaction 75 times, and the size of the test piece is a cylinder with a diameter of 101.6mm×63.5mm.

[0056] S2. Carry out CT scanning on the Marshall specimen standard specimen under dry conditions. The CT scan can be carried out by using X-ray three-dimensional microscope and other equipment. Select the rotating scanning mode and scan continuously along the longitudinal direction of the Marshall specimen standard specimen. The scanning distance is set to 0.5mm, such as figure 2 As shown, 126 two-dimensional tomographic images can be obtained for each Marshall specimen standard specimen.

[0057] Step S3, performing filtering and noise reduction and ...

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Abstract

The invention provides an analysis method for a three-dimensional visual structure of asphalt mixture based on 3D printing. The analysis method comprises steps of manufacturing an asphalt mixture testpiece; carrying out CT scanning of the asphalt mixture test piece to obtain continuous two-dimensional tomography images; processing and segmenting the images to obtain image distribution characteristics of a coarse aggregate main skeleton, asphalt mortar and gaps; reconstructing a three-dimensional structure model of the asphalt mixture; sending the three-dimensional structure model of the asphalt mixture to a 3D printer, printing a three-dimensional solid structure model, and arranging stress sensors in the printing process; analyzing the microstructure composition characteristics of the asphalt mixture, and carrying out a mechanical test. The method is advantaged in that a three-dimensional digital model of the asphalt mixture is materialized, the microstructure composition characteristics of the asphalt mixture are analyzed and the mechanical property test is realized by utilizing the three-dimensional solid structure model, and the three-dimensional microstructure composition ofeach component material of the asphalt mixture can be accurately analyzed, so the design of the asphalt mixture is digitalized, refined and visualized.

Description

technical field [0001] The invention relates to the technical field of road engineering, and more specifically, relates to an analysis method based on the 3D visualization structure of 3D printed asphalt mixture. Background technique [0002] Asphalt mixture is a typical granular material system, which is a kind of porous defect body. The granular aggregate in its material composition accounts for more than 90% by mass ratio, and the main components are coarse aggregate, fine aggregate, asphalt and other The composition of the external admixture and the heterogeneity of the mesostructure of the asphalt mixture have a great influence on its physical and mechanical properties. In the internal structure of asphalt mixture, the coarse aggregate constitutes the main skeleton, and the asphalt mortar composed of fine aggregate, asphalt and other external admixtures fills the gaps between the main skeletons, bonds and restrains the main skeleton, and makes the asphalt mixture form ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/046
CPCG01N23/046
Inventor 石立万金昌宁肖鑫
Owner FOSHAN UNIVERSITY
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