Flowing water flushing numerical experiment method for asphalt pavement

A technique for asphalt pavement and numerical testing, which is applied in the fields of testing wear resistance, permeability/surface area analysis, suspension and porous material analysis, etc. It can solve problems such as numerical testing of asphalt pavement pore dynamic water brushing, and reduce research cost, shorten the research cycle, and achieve difficult effects

Inactive Publication Date: 2015-07-01
JILIN UNIV
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Problems solved by technology

[0006] However, there is no relevant research on the numerical test and indoor test of asphalt pavement pore dynamic water brushing at the mesoscopic angle.

Method used

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  • Flowing water flushing numerical experiment method for asphalt pavement
  • Flowing water flushing numerical experiment method for asphalt pavement
  • Flowing water flushing numerical experiment method for asphalt pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] S1. Establishment of physical model

[0047] S11. Analysis of internal pores of asphalt pavement

[0048] According to the Marshall test mix design technical standard for asphalt stabilized crushed stone mixture, three Marshall specimens with a size of 101.6mm×63.5mm, 75 double-sided compactions, and a porosity between 3% and 6% were produced. CT imaging was performed on it, and the surface and bottom surface of the specimen were scanned and photographed every 10 mm from the surface. The same specimen was photographed 8 times, and a total of 24 pictures were extracted. The images collected by CT show that the distribution of pores inside the specimen is not uniform, and the shapes of the pores are also different. There are more pores with a width of 1-3mm, and the number of pores with a width of 3-5mm is significantly less than that of 1-3mm, and there are also several pores larger than 10mm.

[0049] S12. Determination of the shape of the standard model

[0050] In ...

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Abstract

The invention discloses a flowing water flushing numerical experiment method for an asphalt pavement. On the basis of a CFD-ACE (computational fluid dynamics-adaptive communication environment) and software platform, the size and the distribution condition of flowing water pressure of an asphalt mixture in a single hole of the asphalt pavement under the vehicle loading action can be rapidly and accurately calculated, so as to analyze the law of a water damage failure mechanism of the asphalt pavement structure. Realization of the flowing water flushing experiment for the asphalt pavement from the microscomic view is difficult, high in cost and long in cycle. The flowing water flushing numerical experiment method aims at overcoming the defects of a traditional indoor experiment, shortening the research cycle, and reducing the research cost on the law of the water damage failure mechanism of the asphalt pavement.

Description

technical field [0001] The invention relates to the field of traffic civil engineering, in particular to a numerical test method for dynamic water scouring of asphalt pavement. Background technique [0002] Highways have become the main transportation infrastructure at present. There are 21 provinces, autonomous regions and municipalities whose highway mileage exceeds 1,000 kilometers. Among them, Henan and Shandong provinces exceed 4,000 kilometers, and Jiangsu and Guangdong provinces exceed 3,000 kilometers. As of 2005, there were approximately 2.6 million miles of asphalt and concrete roads across the United States, approximately 91 percent of which were asphalt. With the increase of traffic volume and traffic load, more asphalt roads need to be built, but the more important issue is that the asphalt pavement must maintain good performance to ensure the comfort and safety of driving. In the past, the failure forms of asphalt pavement mainly manifested as rutting, low te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N15/08
Inventor 郭学东孙明志张强曹健陈爽李赫王振勇朱凯旋
Owner JILIN UNIV
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