Interior uniformity recognition method based on relative density of all components of bituminous mixture

Abstract

The invention discloses an interior uniformity recognition method based on the relative density of all components of a bituminous mixture. The interior uniformity recognition method comprises the following steps: firstly, performing tomography in the axial direction of a bituminous mixture test piece to form a plurality of sections of which the effective areas are the same; secondly, dividing each section into a plurality of regular small areas, and establishing a digital image set of the interior structure of the bituminous mixture test piece; thirdly, performing compiled image segmentation and threshold selection; meanwhile, calculating the relative density of all the components in an image according to actual density values and the area ratio of coarse aggregates, gaps and mortar in each small area of the digital image, directly evaluating the interior structure uniformity of the bituminous mixture according to data, and quantitatively judging the damage position of the interior structure of the bituminous 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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