Concrete microscopic three-phase structure visualization method based on 3D printing technology

Abstract

The invention belongs to the technical field of concrete structure non-destructive microscopic detection, and specifically discloses a concrete microscopic three-phase structure visualization method based on a 3D printing technology. The method comprises the following steps: step one, subjecting a concrete test piece to CT scanning to obtain a plurality of two-dimensional tomography images of the concrete test piece in sequence; step two, cutting the obtained two-dimensional tomography images, and subjecting the cut images to three-dimensional model reconstruction; step three, sending the reconstructed three-dimensional model to a 3D printing machine, and printing a solid model by the 3D printing machine according to the received three-dimensional model. The provided method is based on a three-dimensional digital model, and is combined with a 3D printing technology. Aiming at three phases: mortar in concrete, aggregate, and pores, different composite materials are adopted to carry out 3D printing, a concrete three-phase structure interior visualization model, which cannot be produced by a conventional manufacturing technology, can be produced, and the printing is high efficient and repeatable.

Description

technical field [0001] The invention relates to the technical field of mesoscopic non-destructive testing of concrete structures, in particular to a method for visualizing the mesoscopic three-phase structure of concrete materials based on 3D printing technology. Background technique [0002] At the mesoscopic level, concrete can be regarded as a three-phase composite material composed of mortar, aggregate and pores. Due to the heterogeneity of its mesoscopic structure, there are great differences in the macroscopic mechanical properties of concrete materials. So far, domestic and foreign research on concrete mesostructure has been carried out extensively. The main research methods focus on the use of SEM technology and CT technology to detect the internal mesostructure characteristics of concrete. However, the current research is only at the stage of computer reconstruction of the digital model, and has not been able to realize the materialization of the three-dimensional m...

AI Technical Summary

Problems solved by technology

However, the current research is only at the stage of computer reconstruction of the digital model, and has not been able to realize the materialization of the 3D model, which brings a lot of inconvenience to the later research on mesomechanics

[0003] The invention of 3D printing technology is a revolution in the production of complex structures, but there are still many difficulties in printing complex multi-material integrated products

Previously, there have been complex core preparation methods based on CT scanning and 3D printing, but they are still limited to the production of single materials

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