On-line detection method for particle size and shape of stacked aggregate

Abstract

The invention provides an on-line detection method for particle size and shape of stacked aggregate. The method comprises the following steps: directly performing image acquisition on the stacked aggregate under an actual production state; processing an acquired stacked aggregate image; performing geometric characteristic analysis on the processed stacked aggregate image, and calculating a geometric characteristic of each aggregate particle in the stacked aggregate image; according to the geometric characteristic of each aggregate particle in the stacked aggregate image, analyzing to obtain particle size statistics information and particle shape distribution information of the stacked aggregate. According to the on-line detection method for the particle size and shape of the stacked aggregate, sample selection detection of the aggregate is avoided, and the simultaneous aggregate particle size and shape on-line detection can be realized under the actual production state, so that aggregate particle size and shape information in the actual production can be effectively, accurately and timely provided on line.

Description

technical field [0001] The invention relates to detection technology, in particular to an online detection method of particle size and shape of stacked aggregates. Background technique [0002] As the main material of asphalt mixture and cement concrete, aggregate accounts for more than 3 / 4 of the volume and quality of concrete. Its characteristics have an important impact on the rheological properties of concrete, the mechanical properties and durability of hardened concrete. A good aggregate particle size distribution reduces the concrete bulk porosity, makes the concrete work better, has good stability and durability, and reduces the amount of cement slurry and reduces the cost of concrete. The particle shape characteristics also have a great influence on the characteristics of the aggregate. It is generally believed that the particle shape of the coarse aggregate is the best as a sphere or a cube. Conducive to pumping and construction. The scrambling strength of concre...

AI Technical Summary

Problems solved by technology

However, there is a big difference between the pretreated samples and the concrete aggregate state of the actual construction, so the current detection method cannot truly reflect the particle size and shape detection data of the aggregate under the actual working state.

Moreover, there is often a time lag between the test results of the samples and the actual production status of the concrete aggregate, so that online testing cannot be realized, and closed-loop control of the entire production process cannot be realized.

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