Method for testing bendability and extensibility of 3D printing cement-based material

A cement-based material, 3D printing technology, applied in the field of architectural 3D printing, can solve problems such as affecting the printing quality, prone to cracks in the printing corner, no detection method or standard, etc., to achieve the effect of quantitative performance
CN112213205AActive Publication Date: 2021-01-12SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD
Publication Date
2021-01-12

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Abstract

The invention discloses a method for testing the bendability and extensibility of a 3D printing cement-based material. The method comprises the following steps: step 1, testing the bendability of thecement-based material; wherein an extrusion device extrudes the cement-based material printing strip on a workbench according to a specified broken line path or a curve path, the broken line corner value of the broken line-shaped printing strip is gradually reduced in a gradient manner along with the increase of the detection times, and the broken line corner value of the printing strip when cracks occur at the broken line corner is recorded; the curvature value of the curve corner of the curve-shaped printing strip is gradually increased in a gradient manner along with the increase of the detection times, and the curvature value of the printing strip when the curve corner is cracked is recorded; step 2, comparing the bendability of the cement-based material; and step 3, testing the extensibility of the cement-based material. The method detects and evaluates the printing capability of the 3D printing cement-based material with an inclination or extensibility structure, is helpful to quantify the printing performance of the printing material, and has a guiding effect on the preparation of the 3D printing cement-based material.
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Description

technical field

[0001] The invention belongs to the technical field of architectural 3D printing, and in particular relates to a method for testing the bending and stretching properties of 3D printing cement-based materials. Background technique

[0002] In recent years, architectural 3D printing technology has begun to develop. Architectural 3D printing technology is an interdisciplinary digital construction technology. The requirements for building materials are different from those in the past. The materials used for architectural 3D printing are mainly cement-based materials. With the changes in performance requirements for cement-based materials and different application scenarios, relevant testing methods for materials also need to be updated and supplemented. In this regard, scholars at home and abroad have carried out a lot of research work, and have formulated or are formulating some performance testing standards for 3D printing cement-based materials. , the accumu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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