Method and equipment for collecting three-dimensional morphological characteristics of coarse aggregate based on laser scanning

Abstract

The invention discloses a method and equipment for collecting three-dimensional morphological characteristics of coarse aggregate based on laser scanning. The method comprises the following steps: selecting the coarse aggregate needing to be subjected to three-dimensional morphological characteristic collection; washing the coarse aggregate with water to obtain clean coarse aggregate; placing the coarse aggregate on a laser scanning workbench; scanning the coarse aggregate by using a laser scanning device to obtain a first three-dimensional image of the coarse aggregate; turning over the coarse aggregate to obtain a second three-dimensional image of the shielded part of the coarse aggregate; splicing the first three-dimensional image and the second three-dimensional image of the coarse aggregate to obtain a complete coarse aggregate three-dimensional image; and based on the complete three-dimensional image of the coarse aggregate, obtaining three-dimensional morphological characteristic parameters of the coarse aggregate. Through laser scanning and three-dimensional image splicing, the complete coarse aggregate three-dimensional image can be directly obtained, the defect that three-dimensional morphological characteristic parameters of the coarse aggregate are obtained through an indirect method and a two-dimensional image is overcome, and rapid parameter identification measurement and quantitative description of coarse aggregate particles can be carried out.

Description

technical field [0001] The invention belongs to the technical field of coarse aggregates, and in particular relates to a method and equipment for collecting three-dimensional shape characteristics of coarse aggregates based on laser scanning. Background technique [0002] Asphalt mixture is a commonly used pavement material for high-grade pavement. Coarse aggregate accounts for 50%-80% of the total mass of asphalt mixture. The morphological characteristics (shape, angle and texture) of coarse aggregate have an important impact on the performance of asphalt mixture. . [0003] There have been a lot of research on the influence of coarse aggregate on the performance of asphalt mixture at home and abroad, and some basic consensus has been obtained. In terms of shape, an increase in the content of needle-like aggregates will lead to an increase in the optimum asphalt ratio and void ratio of the asphalt mixture, which will reduce the high temperature stability, water stability a...

AI Technical Summary

Problems solved by technology

However, the two-dimensional image can only reflect the contour changes on a certain section of the aggregate, and cannot fully reflect the morphological characteristics of the aggregate.

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