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Asphalt-aggregate adhesion quantitative evaluation method based on ultrasonic waved and image processing

An image processing and ultrasonic technology, applied in the direction of measuring devices, analysis materials, instruments, etc., can solve the problems of low accuracy and large human error, and achieve the effect of easy realization, small error and high simulation accuracy

Inactive Publication Date: 2020-06-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above defects or improvement needs of the prior art, the present invention proposes a method for quantitative evaluation of asphalt-aggregate adhesion based on ultrasound and image processing, thereby solving the problem of traditional water boiling and water immersion methods in evaluating asphalt and aggregate adhesion. The technical problems of low accuracy and large human error in the adhesion of aggregates

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  • Asphalt-aggregate adhesion quantitative evaluation method based on ultrasonic waved and image processing
  • Asphalt-aggregate adhesion quantitative evaluation method based on ultrasonic waved and image processing
  • Asphalt-aggregate adhesion quantitative evaluation method based on ultrasonic waved and image processing

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Embodiment 1

[0045] A method for quantitative evaluation of asphalt-aggregate adhesion based on ultrasonic and image processing, comprising the following steps:

[0046] 1) Take 100g of aggregates with a particle size of 9.5-13.2mm and 5.5±0.2g of asphalt and mix them evenly at a mixing temperature of 150°C, spread them on a glass plate, and cool them at room temperature for 1 hour for later use;

[0047] 2) Divide the asphalt-coated aggregates into three groups, and place them in an ultrasonic cleaning machine for ultrasonic peeling. The water temperature is controlled at 60°C, the ultrasonic frequency is 40khz, and the ultrasonic process lasts for 40 minutes;

[0048] 3) Take out the processed aggregates, select 6-8 aggregates and place them in a water-filled white porcelain bowl, and image the aggregates under the irradiation of a ring-shaped shadowless lamp to obtain a clear image representing the aggregates, such as figure 2 As shown, under the illumination of the annular shadowless ...

Embodiment 2

[0062] What is different from Example 1 is: No. 90 bitumen selected has been mixed with the liquid anti-stripping agent (non-amines, PM-JL-06A type asphalt anti-stripping agent) of 0.3wt%, after mixing the liquid anti-stripping agent, energy Significantly improves the adhesion between asphalt and acidic aggregates. Mix No. 90 asphalt heated to a fluid state with a specified amount of liquid anti-stripping agent, and shear it under a high-speed shear (150°C, 3000r / min) for 10 minutes to obtain the desired modified asphalt. Other steps are the same as in Example 1. Table 4 shows the asphalt coating rate after adding anti-stripping agent to No. 90 asphalt and four kinds of aggregates after ultrasonically accelerated water damage.

[0063] It can be seen from Table 4 that after the anti-stripping agent is added to the asphalt, the adhesion to the four kinds of stones is improved. Among them, the adhesion of asphalt to acidic aggregate granite and neutral aggregate andesite has b...

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Abstract

The invention discloses an asphalt-aggregate adhesion quantitative evaluation method based on ultrasonic waved and image processing and belongs to the field of road engineering. The method comprises steps of heating 5.3-5.7 g of asphalt and 100 g of aggregate to 150-160 DEG C, mixing for 1-2 min to obtain asphalt-coated aggregate, and placing the asphalt-coated aggregate in an ultrasonic cleaningmachine for ultrasonic stripping treatment; then, transferring the aggregate into a water-injected white porcelain bowl, and photographing to obtain a clear image of the aggregate; and performing grayprocessing of the aggregate image by utilizing image processing, performing statistics to obtain the total number of pixel points representing an asphalt coating area and an aggregate area, and taking the ratio of the asphalt coating area to the aggregate area as an asphalt coating rate of the aggregate surface so as to evaluate adhesion between asphalt and the aggregate. The method is advantagedin that the method overcomes defects of low accuracy and large personal error in evaluation of adhesion of the asphalt and the aggregate by traditional water boiling methods and water immersion methods, has advantages of high detection precision and good accuracy, and can be used for quantitative analysis of adhesion of the asphalt and the aggregate.

Description

technical field [0001] The invention belongs to the field of road engineering, and more specifically relates to a method for quantitative evaluation of asphalt-aggregate adhesion based on ultrasonic waves and image processing. Bitumen-Aggregate Adhesion. Background technique [0002] Asphalt pavement materials are widely used in high-grade highway construction because of their excellent road performance. However, asphalt pavement will suffer from various diseases due to factors such as vehicle load, sunlight, and rainwater during its service. Among them, the water damage of asphalt pavement is one of the most important diseases affecting the service life of asphalt pavement in my country. Water damage to asphalt pavement refers to the fact that water seeps into the asphalt pavement voids and generates hydrodynamic pressure under the action of wheel loads, water seeps into the interface between asphalt and aggregate, the asphalt gradually loses its cohesive force with the a...

Claims

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Application Information

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IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 陈美祝肖志峰吴少鹏刘全涛谢君杨天元任彦飞苟譞文
Owner WUHAN UNIV OF TECH