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Evaluation method of anti-skid performance of coarse aggregate based on AIMS aggregate imaging system

An imaging system and anti-skid performance technology, applied in the direction of analyzing materials, instruments, measuring devices, etc., can solve the disadvantages of not effectively reflecting the surface characteristics of coarse aggregate and the pros and cons of skid resistance, and the design and improvement of asphalt pavement skid resistance impact, large variability of coarse aggregate grinding value measurement results, etc., to achieve excellent long-term anti-skid performance, scientific and reasonable evaluation methods, and intuitive evaluation results

Active Publication Date: 2020-05-12
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this index is relatively single, and the measurement results of coarse aggregate polishing value have great variability, which cannot effectively reflect the surface characteristics and skid resistance of coarse aggregate. will adversely affect

Method used

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  • Evaluation method of anti-skid performance of coarse aggregate based on AIMS aggregate imaging system
  • Evaluation method of anti-skid performance of coarse aggregate based on AIMS aggregate imaging system
  • Evaluation method of anti-skid performance of coarse aggregate based on AIMS aggregate imaging system

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Embodiment 1

[0030] The anti-skid performance evaluation method of AIMS-based diorite A and diorite B in this embodiment comprises the following steps:

[0031] Use the AIMS aggregate imaging system to scan the images of the diorite A and B, measure and calculate the angularity index Ai of the coarse aggregate by using its own data processing system; the diorite A and B in this embodiment are before the scanning measurement , it should be cleaned first to remove dust and other impurities, so as not to interfere with the scanning results. Scan results see figure 1 and figure 2 , and the measurement data are shown in Table 1.

[0032] Table 1 Angular AIMS measurement results of diorite A and B

[0033] sample Particle size (mm) Ai(mm) Diorite A 4.75 2709.6 Diorite A 9.5 2697.8 Diorite B 4.75 2852.7 Diorite B 9.5 2593.2

[0034] Utilize AIMS aggregate material imaging system, carry out image scanning to diorite A, B, adopt wavelet method to m...

Embodiment 2

[0046] The present embodiment is based on the skid resistance evaluation method of the diabase of AIMS, limestone and comprises the following steps:

[0047](1) Utilize the AIMS aggregate imaging system to scan the image of diabase and limestone, measure and calculate the angularity index Ai of the coarse aggregate; before the diabase and limestone in the present embodiment are scanned and measured, they should be Perform a wash to remove impurities such as dust that could interfere with your scan results. scan result Figure 5 and Figure 6 , the measured data are shown in Table 5.

[0048] Table 5 Angular AIMS measurement results of diabase and limestone

[0049] sample Particle size (mm) Ai(mm) Diabase 4.75 2699.9 Diabase 9.5 2701.4 limestone 4.75 3092.1 limestone 9.5 2938.8

[0050] (2) Utilize AIMS aggregate material imaging system, image scanning is carried out to diabase, limestone, adopt wavelet method to measure and de...

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Abstract

The invention provides a method for evaluating the anti-skid performance of coarse aggregate based on the AIMS aggregate imaging system. The method includes the following steps: 1. Carry out image scanning on the coarse aggregate, measure and calculate the angularity index Ai of the coarse aggregate; 2. Scan the image of the coarse aggregate, measure and determine the surface texture index Tr of the coarse aggregate by using the wavelet method; 3. Calculate and determine the comprehensive index CAAT of the surface characteristics of the coarse aggregate; 4. Measure the coarse aggregate by using the Los Angeles abrasion test method The wear value Q; 5. Comprehensive evaluation of the anti-skid performance of coarse aggregate. The present invention comprehensively adopts the CAAT index and the abrasion value index instead of the traditional grinding value to evaluate the anti-skid performance of the coarse aggregate. The coarse aggregate can provide effective technical support to ensure the long-term skid resistance of asphalt pavement.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a method for evaluating the skid resistance of coarse aggregate based on an AIMS aggregate imaging system. Background technique [0002] In recent years, my country's expressways have developed rapidly. While providing efficient and convenient transportation services, they are also facing more and more threats of traffic accidents. The anti-skid performance of pavement is an important factor affecting the driving safety of expressways. How to improve the anti-skid performance of pavement has increasingly become the focus of attention. [0003] From the perspective of material composition, aggregates account for about 95% of asphalt mixtures, and the properties of aggregates (especially coarse aggregates) are crucial to the skid resistance of asphalt mixtures. Aggregate with rough surface and good angularity not only has a better microstructure, but also faci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor 徐金枝刘红瑛苏子兴董立鹏贺玲娟王春
Owner CHANGAN UNIV
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