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Local thermal regenerative heating effect indoor test simulation method for asphalt pavement

A technology for asphalt pavement and heating effect, which is applied in the field of thermal regeneration of asphalt pavement, can solve the problems that the heating effect is difficult to evaluate accurately, and achieve the effects of low test cost, incomplete evaluation, and high electrothermal conversion rate

Inactive Publication Date: 2015-07-22
NANJING FORESTRY UNIV
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Problems solved by technology

[0011] The purpose of the present invention is to provide an indoor test simulation method for accurately analyzing the heating effect of hot-in-place regeneration of asphalt pavement. Provide basis for pavement structure temperature field change law

Method used

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  • Local thermal regenerative heating effect indoor test simulation method for asphalt pavement

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Embodiment Construction

[0018] The purpose of the present invention is to provide a kind of indoor test simulation method for accurately analyzing the in-situ thermal regeneration heating effect of asphalt pavement, and the specific implementation steps are as follows:

[0019] (1) Mix the asphalt mixture in accordance with the relevant requirements of "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011), and spread the cut newspapers on the bottom and surrounding sides of the rut slab test mold, so that the bottom and sides are uniform. Separated by newspapers, draw marks with a marker pen at 1cm intervals on the newspapers around the trial mold;

[0020] (2) Take the hot asphalt mixture and spread it quickly into the rut plate test mold, and use a compaction hammer to preliminarily compact the asphalt mixture with a thickness of 1cm. figure 1 No. 1 and No. 2 temperature sensors are arranged in the center of the specimen and a quarter of the diagonal, respectivel...

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Abstract

The invention discloses a local thermal regenerative heating effect indoor test simulation method for an asphalt pavement, which can be used for accurately analyzing a local heat regenerative heating effect, belongs to the technical field of thermal regeneration of the asphalt pavement, and is used for solving the problem that a heating effect of the interior of the pavement in a local thermal regenerative continuous construction process of the asphalt pavement is difficultly and accurately judged. A track plate test piece is prepared at first, temperature sensors are embedded in the center of the test piece and on the 1 / 4 part of a diagonal in a different-thickness form; the surrounding of the test piece is covered by using a heatproof asbestos board, and a thermocouple wire is connected with a temperature recording instrument; a local thermal regenerative heating device is simulated by using a far-infrared quartz heating plate, the heating plate is fixed above a track plate in certain height by utilizing an iron frame; a power switch of the heating plate is switched on and regulated to the required radiation power to be preheated; finally, the test piece is heated by simulating two heating ways including one-off scene local thermal regeneration and intermittent scene local thermal regeneration respectively, the different position temperatures of the test piece in a heating process can be recorded, and the heating effect of the interior of the track plate test piece of an asphalt mixture under different heating ways can be analyzed.

Description

technical field [0001] The invention relates to a method for accurately analyzing the heating effect of in-situ thermal regeneration of asphalt pavement, in particular to a method for simulating the heating effect of asphalt pavement by indoor test, and belongs to the technical field of thermal regeneration of asphalt pavement. Background technique [0002] Asphalt pavement recycling technology is divided into four categories according to the construction temperature and process requirements: plant-mixed hot recycling, in-situ hot recycling, factory-mixed cold recycling, and in-situ cold recycling. Among them, hot-in-place regeneration refers to the use of special hot-in-place regeneration equipment to heat and mill the asphalt pavement, mix a certain amount of new asphalt, new aggregates, regeneration agents, etc. Rolling and other processes, one-time realization of the old asphalt pavement regeneration technology within a certain depth range on the surface, basically appli...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 许涛黄凯袁峻马翔
Owner NANJING FORESTRY UNIV
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