An online testing method for dynamic characteristics of 3D printing of cement-based materials

Abstract

The invention relates to an online testing method for 3D printing dynamic characteristics of a cement-based material. The online testing method comprises the following steps of 1) constructing an online testing platform for 3D printing dynamic characteristics of the cement-based material; (2) collecting the printing process parameters in the 3D printing process on line and in real time, and (3) establishing a 3D printing dynamic characteristic prediction model of the cement-based material, and evaluating the 3D printing quality of the cement-based material, namely the printability of the cement-based material. Compared with the prior art, the method has the advantages of comprehensive consideration factors, automatic continuous testing and high applicability.

Description

technical field [0001] The invention relates to the technical field of 3D printing detection of cement-based materials, in particular to an online testing method for dynamic characteristics of 3D printing of cement-based materials. Background technique [0002] 3D printing of cement-based materials is a disruptive construction technology. Different from the concrete materials used in traditional construction, cement-based materials for 3D printing must be printable. Since there is no corresponding national or industry standard at present, how to design and evaluate the performance of concrete printing is the key to breaking through the bottleneck of architectural 3D printing technology. Printability is not only closely related to the rheology of the material, but also process-dependent. However, the existing rheological measurement technology does not consider the dynamic changes of material properties caused by the process, and most of the research on printability is still...

AI Technical Summary

Problems solved by technology

The Chinese patent "A Test Device and Test Method for Construction Performance of Architectural 3D Printing Materials" proposes a test device that fits and creates parameters that characterize the construction performance of 3D printed cement materials based on multiple data tested, but it is still A static measurement method that deviates from the actual 3D printing process

At present, the existing testing instruments mainly perform static tests on one or two indicators of the rheological properties of materials. The test is carried out on a separate testing instrument, which is separated from the actual cement 3D printing equipment and difficult to integrate, so it cannot be comprehensively reflected. The correlation between each indicator and each parameter of the 3D printing equipment cannot be dynamically fed back to the performance parameters, nor can it reflect the changes in the performance parameters during the actual printing process

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