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Test method for bond strength between layers of 3D printed building structures

A 3D printing and building structure technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of inapplicable 3D printing special interlayer bonding methods, etc., and achieve intuitive and reliable detection results Good performance and high accuracy

Active Publication Date: 2020-12-08
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD +1
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AI Technical Summary

Problems solved by technology

However, the current test and evaluation methods for the bonding performance of building structures are no longer suitable for the special interlayer bonding method of 3D printing.

Method used

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  • Test method for bond strength between layers of 3D printed building structures
  • Test method for bond strength between layers of 3D printed building structures
  • Test method for bond strength between layers of 3D printed building structures

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Embodiment Construction

[0024] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] It should be noted that, in the description of the present invention, the terms "horizontal", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention.

[0026] refer to Figure 1 to Figure 3 , in this preferred embodiment, a method for testing the bond streng...

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Abstract

The invention discloses a method of testing interlayer adhesion strength of a 3D-printed building structure. The method includes the following steps: 1) using 3D printing technology to print a bottom-layer test piece and a top-layer test piece in equal width, height and length to obtain a concrete member test piece; 2) maintaining and drying the concrete member test piece, fixing connectors on thetwo sides of both the bottom-layer test piece and the top-layer test piece to obtain a test sample, wherein insert slots are formed between the two connectors at the same sides of the bottom-layer test piece and the top-layer test piece; 3) respectively placing an inverted-T-shaped test piece and a T-shaped test piece on the two ends of the test sample, wherein the inverted-T-shaped test piece and the T-shaped test piece are respectively fixed on the bottom surface and an upper pressure surface of a loading device and are inserted into the insert slots; 4) at constant speed, applying a load by means of a loading device until the test sample is fractured, measuring area of an interlayer joint surface, and calculating the interlayer adhesion strength according to the value of a maximum pressure applied by the loading device. The method is convenient to carry out and has high reliability.

Description

technical field [0001] The invention relates to the technical field of performance detection of building materials, in particular to a method for testing the bond strength between layers of a 3D printed building structure. Background technique [0002] 3D printing is a construction method that superimposes two-dimensional graphics layer by layer according to the digital model, and finally forms a three-dimensional entity. Compared with the traditional manufacturing mode, this additive manufacturing method has higher flexibility, diversity and economy. It has been used in many industries such as medical treatment, automobile industry, mold, design, aerospace, food and so on. It is also the future One of the main directions of technological development. [0003] In the field of construction, the application of 3D printing technology will subvert the current situation of high energy consumption and high pollution in the traditional construction mode. It will greatly enrich the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N19/04
CPCG01N3/08G01N19/04
Inventor 林家超王军吴雄杨文赵日煦
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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