Permeable 3D printing cement-based material interface reinforcing agent and application thereof

A technology of cement-based materials and interface enhancers, applied in the direction of adhesives, inorganic adhesives, adhesive additives, etc., can solve the problems of interface strength improvement, complex process, high printing equipment requirements, etc. The effect of improving overall performance

Active Publication Date: 2021-07-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still difficult to improve the interface strength to the matrix level with the above-mentioned common coating-type interface agents, and the coating operation needs to be carried out alternately with printing, the process is more complicated, and the printing equipment is highly required

Method used

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  • Permeable 3D printing cement-based material interface reinforcing agent and application thereof
  • Permeable 3D printing cement-based material interface reinforcing agent and application thereof
  • Permeable 3D printing cement-based material interface reinforcing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A permeable 3D printing cement-based material interface enhancer and application thereof, comprising the following steps:

[0022] Calcium formate: analytically pure;

[0023] Disodium edetate: analytically pure;

[0024] Sodium silicate solution: mass concentration 40%, modulus 3.3;

[0025] Lithium silicate solution: mass concentration 25%, modulus 4.8;

[0026] Nano-silica sol: Add sodium silicate solution dropwise to 1% acetic acid solution until pH=10.00±0.01.

[0027] 1) Dissolve calcium formate in a container with tap water at room temperature to prepare a calcium formate solution with a mass concentration of 10% as component A;

[0028] 2) At room temperature, mix 8.9 parts by mass of sodium silicate solution with 58 parts by mass of lithium silicate solution, and stir at 450 rpm for 1.5 h;

[0029] 3) Add 0.2 parts by mass of disodium edetate to the above solution, continue to stir at 450 rpm for 0.5 h; let stand for 12 h;

[0030] 4) Add 32.9 parts of nan...

Embodiment 2

[0035] A permeable 3D printing cement-based material interface enhancer and its application, its raw material formula and the preparation process of components A and B, that is, step 1)-step 4) are the same as in Example 1, and the subsequent steps are as follows:

[0036] 5) After the printing cement slurry to be processed has been formed for 24 hours, add component A twice at the gap of the vertical interface, each time at a dosage of 4 mL / m, with an interval of 6 hours, and then send it to the standard curing room for curing ;

[0037] 6) After the printing cement slurry to be processed is formed for 72 hours, add component B dropwise at the vertical interface gap twice, each time at a dosage of 4 mL / m, with an interval of 6 hours each time, and then maintain it in the standard curing room until 14 d age.

[0038] Example 2 provides enhanced effect on vertical printing interface at lower usage. Among them, the 14 d splitting tensile strength of the matrix material, the in...

Embodiment 3

[0040] A permeable 3D printing cement-based material interface enhancer and its application, its raw material formula and the preparation process of components A and B, that is, step 1)-step 4) are the same as in Example 1, and the subsequent steps are as follows:

[0041] 5) After the printing cement slurry to be processed is formed for 8 hours, add component A twice at the gap of the vertical interface, each time at a dosage of 4 mL / m, with an interval of 4 hours each time, and then send it to the standard curing room for curing ;

[0042] 6) After the printing cement slurry to be processed is formed for 24 hours, add component B dropwise at the gap of the vertical interface twice, each time at a dosage of 4 mL / m, with an interval of 4 hours each time, and then maintain it in the standard curing room until 14 d age.

[0043] Example 3 provides the enhanced effect of the earlier treatment on the vertical printing interface at lower usage. Among them, the 14 d splitting tens...

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Abstract

The invention relates to a permeable 3D printing cement-based material interface reinforcing agent and application thereof, the permeable 3D printing cement-based material interface reinforcing agent comprises a component A and a component B. The component A is a calcium formate solution; the component B is prepared by the following method: mixing a sodium silicate solution with a lithium silicate solution at room temperature; adding disodium ethylene diamine tetraacetate into the solution; and adding the nano silicon dioxide sol into the solution, and stirring until the solution is clear and transparent. According to the invention, the excellent interface strength improving effect is provided, the interface splitting tensile strength can be doubled during the 14 d curing period, the treated interface strength can achieve or even exceed the strength of the base material according to the use condition, and the overall performance of the printed product is greatly improved; the 3D printing cement-based material interface reinforcing agent has the advantages of easily available raw materials, simple preparation and convenient use, can realize an excellent interface reinforcing effect under a low dosage, and is suitable for interfaces of printed products with complex shapes in all directions.

Description

technical field [0001] The invention belongs to the field of 3D printing building materials, and in particular relates to a permeable 3D printing cement-based material interface enhancer and its application. Background technique [0002] 3D printing is a major research hotspot in the current construction field. Extrusion printing is to prepare mortar, concrete and other building materials into a printable "paste", and then use a 3D printer to extrude it to the position specified by the program. A technique for forming the desired shape and structure of layers. This technology has the advantages of no formwork and automation, and has been successfully applied in the fields of complex-shaped decorative parts and small-scale functional buildings. Extrusion 3D printing has high requirements on the fluidity of printing materials. Not only does the material need to maintain its own shape after extrusion, but it also needs to be able to bear the weight of the upper layer during pr...

Claims

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Application Information

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IPC IPC(8): C09J1/00C09J1/02C09J11/06
CPCC09J1/00C09J1/02C09J11/06
Inventor 佘伟耿子凡张文华
Owner SOUTHEAST UNIV
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