Internal homogeneity identification method based on the relative density of each component of asphalt mixture

Abstract

The invention discloses an internal uniformity identification method based on the relative density of each component of an asphalt mixture. First, tomographic scanning is carried out along the axial direction of the asphalt mixture specimen to form several sections with equal effective areas, and then each section is divided into several sections. Establish a digital image collection of the internal structure of the asphalt mixture specimen in a regular small area; then edit the image segmentation and threshold value selection; at the same time, calculate according to the actual density value and area ratio of the coarse aggregate, void and mortar in each small area of ​​the digital image The relative density of each component in the image can directly evaluate the uniformity of the internal structure of the asphalt mixture based on the data, and can also quantitatively determine the damage position in the internal structure of the asphalt mixture.

Description

technical field [0001] The invention relates to a method for identifying material uniformity, in particular to a method for evaluating the uniformity of the internal structure of asphalt mixture and judging the damage position. Background technique [0002] The existing research methods for the uniformity of the internal structure of asphalt mixture mainly divide the cross-section of the asphalt mixture specimen into four small areas with equal areas, and calculate the parameters such as aggregate quantity, centroid position and area ratio in each area to evaluate its uniformity performance. . Since the integrity of a small part of the coarse aggregate will inevitably be destroyed when dividing the area, errors will occur when calculating the centroid position of the aggregate. In addition, only the influence of coarse aggregate on the uniformity of asphalt mixture is considered, and the effect of mortar and voids is ignored, and this method is not accurate for judging the ...

AI Technical Summary

Problems solved by technology

Since the integrity of a small part of the coarse aggregate will inevitably be destroyed when dividing the area, an error will occur when calculating the centroid position of the aggregate

In addition, only the influence of coarse aggregate on the uniformity of asphalt mixture is considered, and the effect of mortar and voids is ignored, and this method is inaccurate for judging the damage location

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