Method and device for testing content distribution of moisture in aggregate surface layer
A technology of distribution detection and aggregation, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems that the moisture content cannot be reflected, cannot be analyzed, and the distribution of moisture content is uneven.
Active Publication Date: 2019-08-13
GUANGZHOU UNIVERSITY
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[0005] However, there is no quantitative analysis and research on the distribution of water content of different mineral components on the surface of aggregates in the prior art. The evaluation of water damage performance of asphalt mixtures is mainly based on the study of the adhesion between the overall water content of aggregates and asphalt. Evaluation of Water Stability of Asphalt Mixture
However, after moisture invades into the surface layer of the aggregate, due to the large differences in the mineral composition and internal texture structure of different aggregates, after the moisture enters the aggregate from the ruptured position of the asphalt film, the content distribution of the moisture on the surface layer of the aggregate is uneven, and the overall moisture content of the aggregate It cannot reflect the distribution of surface moisture, so there is a certain deviation between the analysis of the influence of moisture on the interfacial adhesion based on the overall moisture content of the aggregate and the actual situation, which makes it impossible to analyze the attenuation mechanism of the asphalt-aggregate interfacial adhesion under different mineral moisture contents
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0033] see figure 1 , a method for detecting the content distribution of moisture in the surface layer of the aggregate provided by the embodiment of the present invention includes the following steps. It should be noted that the sequence of the following steps is only illustrative and is not intended as a limitation of the present invention;
[0034] Step S101: Obtain several aggregates to be detected with the same material but different moisture content, and dete...
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Abstract
The invention discloses a method and device for testing content distribution of moisture in an aggregate surface layer. The method comprises the following steps of obtaining a plurality of aggregatesto be tested with the same material but different moisture contents, and detecting and identifying all the constituent components of the aggregate surface layer to obtain a plurality of components ofthe surface layer; obtaining a plurality of material sets to be tested, and performing spectral detection on each of the material set to be tested to obtain the hyperspectral images of the respectivepixels of the same material at different moisture contents and further obtain the hyperspectral images of the respective pixels of respective components of the surface layer at different moisture contents; performing spectral detection on the aggregate surface layer of each aggregate to be tested to obtain hyperspectral images of the respective pixels of the aggregate surface layer of the aggregates to be tested at different moisture contents; and performing matching to obtain the moisture contents of each surface layer component of the aggregate surface layer of the aggregates to be tested atdifferent moisture contents. By carrying out the embodiments of the invention, it is possible to quantitatively detect the content distribution of different components of moisture in the aggregate surface layer.
Description
technical field [0001] The invention relates to the technical field of asphalt mixture analysis, in particular to a method and device for detecting the content distribution of moisture in the aggregate surface layer. Background technique [0002] As an important road construction material, asphalt mixture has been widely used in the construction of high-grade pavement in our country. More and more studies believe that moisture is one of the main causes of interface damage between asphalt and aggregates and performance degradation of asphalt pavement. The research on water damage at the asphalt-aggregate interface in the prior art mainly focuses on the adhesion of aggregates, the densification method of asphalt mixture based on gradation optimization, the performance and mechanism of various anti-stripping agents, and water in asphalt mixing. The flow process in the material voids, etc., and the impact of water intrusion into the asphalt-aggregate interface on the macroscopi...
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IPC IPC(8): G01N21/25
CPCG01N21/25
Inventor 黄文柯崔文天
Owner GUANGZHOU UNIVERSITY