Method for calculating thickness of asphalt membrane on surface of aggregate in asphalt mixture

A technology for asphalt mixture and asphalt film thickness, which is applied in the direction of measuring devices, instruments, and wave/particle radiation, etc., can solve the problems of different asphalt films and low accuracy, and achieve simple operation, great correlation, and good application foreground effect

Inactive Publication Date: 2016-10-19
CHANGAN UNIV
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Problems solved by technology

However, the most commonly used method for calculating the thickness of asphalt film is not very accurate. The traditional method of calculating the thickness of asphalt film is regarded as the same value, but in fact the thickness of the asphalt film covering the surface of aggregates with different particle sizes is different. of

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  • Method for calculating thickness of asphalt membrane on surface of aggregate in asphalt mixture
  • Method for calculating thickness of asphalt membrane on surface of aggregate in asphalt mixture
  • Method for calculating thickness of asphalt membrane on surface of aggregate in asphalt mixture

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Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0051] The invention uses X-ray CT scanning technology to obtain the thickness of the asphalt film, and realizes the purpose of more accurately determining the thickness of the asphalt film on the aggregate surface. The present invention specifically comprises the following steps:

[0052] Step 1: Prepare the sample: According to the determined optimal asphalt dosage and gradation, mix the asphalt mixture, and the mixing should be uniform and sufficient. The choice of asphalt dosage and gradation can choose different asphalt dosage and gradation according to the performance of the asphalt mixture used.

[0053] Step 101: According to the "Technical Specifications for Construction of Highway Asphalt Pavement", the mix ratio design of the asphalt mixture of the test piece is carried out, and the mixing and compaction temperature of the asphalt material is dete...

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Abstract

The invention relates to a method for calculating the thickness of an asphalt membrane on the surface of aggregate in an asphalt mixture. The method comprises the steps of selecting the aggregate from an asphalt mixture sample randomly to serve as a scanning sample; scanning the scanning sample to obtain a scanning image; obtaining the total area As of the aggregate and asphalt and the area Aa of the aggregate in the scanning image, calculating the equivalent circle radium Rs corresponding to the total area As through the total area As, and calculating the equivalent circle radium Ra corresponding to the aggregate area Aa through the aggregate area Aa; obtaining the thickness of the asphalt membrane on the surface of the aggregate according to the difference between the equivalent circle radium Rs and the equivalent circle radium Ra. The thickness of the asphalt membrane on the surface of aggregate with same asphalt content and different particle sizes can be scanned and calculated, and results show that the thickness of the asphalt membrane decreases while the particle size of the aggregate increases. According to the method, data are reliable and accurate.

Description

【Technical field】 [0001] The invention belongs to the field of asphalt film thickness calculation, in particular to a calculation method for the asphalt film thickness on the aggregate surface in asphalt mixture. 【Background technique】 [0002] The asphalt film thickness of asphalt mixture has an extremely important reference value for the mineral aggregate gradation design of asphalt mixture and the determination of the optimal asphalt dosage. In the asphalt mixture, in order to make the asphalt mixture have good characteristics such as high temperature anti-rutting, low temperature anti-cracking, water damage resistance, and fatigue resistance, it is necessary to ensure that the asphalt film wrapped around the aggregate has a certain thickness. The performance of the mixture is greatly affected. The thicker the asphalt film, the more flexible and durable the asphalt mixture; the thinner the asphalt film, the more brittle the asphalt mixture, and the easier it is to crack a...

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Application Information

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IPC IPC(8): G01B15/02
CPCG01B15/02
Inventor 汪海年张然姚晓光尤占平姜鑫
Owner CHANGAN UNIV
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