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A high-ductility fiber-reinforced cement-based composite material for 3D printing and its preparation method

A fiber-reinforced cement and composite material technology, which is applied in the field of cement-based composite material admixtures and 3D high-ductility fiber-reinforced cement-based composite materials, can solve the problems of inability to meet the printability, buildability, interlayer bonding strength, etc. Guaranteed structural integrity and mechanical properties, good buildability, and controllable lateral deformation

Active Publication Date: 2020-03-06
万玉君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the workability and the setting and hardening process of the existing high-ductility fiber-reinforced cement-based materials, these materials cannot meet the requirements of the 3D printing process for materials such as printability, buildability, and interlayer bond strength.

Method used

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  • A high-ductility fiber-reinforced cement-based composite material for 3D printing and its preparation method
  • A high-ductility fiber-reinforced cement-based composite material for 3D printing and its preparation method
  • A high-ductility fiber-reinforced cement-based composite material for 3D printing and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An admixture composition that can improve the applicability of concrete 3D printing, its specific components and dosage are shown in the following table 1:

[0041] Table 1

[0042] Component type Dosage (%) diatomite 18 Ultrafine slag powder 15 Hydroxyethyl Methyl Cellulose Ether 0.5 Lithium salt accelerator 10 Sodium Gluconate Retarder 5 Terpolymer rubber powder of ethylene, vinyl chloride and vinyl laurate 8 Calcium oxide expansion agent 6.5 Naphthalene series superplasticizer 5

Embodiment 2

[0044] An admixture composition that can improve the applicability of concrete 3D printing, its specific components and dosage are shown in Table 2 below:

[0045] Table 2

[0046] Component type Dosage (%) Silica fume 10 rice husk ash 7 xanthan gum 0.2 Sodium metasilicate 10 Sodium citrate retarder 4.8 Vinyl acetate, ethylene and higher fatty acid vinyl ester ternary copolymer rubber powder 10 ettringite expansion agent 16 Polycarboxylate High Performance Water Reducer 5

Embodiment 3

[0048] An admixture composition that can improve the applicability of concrete 3D printing, its specific components and dosage are shown in Table 3 below:

[0049] table 3

[0050] Component type Dosage (%) Nano silica 10 diatomite 7 Silica fume 8 Methylcellulose 0.2 Aluminum sulfate solution 7 Phosphate cellulose retarder 1.8 Acrylate and Styrene Copolymer Powder 2 Calcium oxide expansion agent 2 Polycarboxylate High Performance Water Reducer 2

[0051] Examples 4-8 are high-ductility fiber-reinforced cement-based composite materials for 3D printing prepared by using Portland cement, wherein the admixture composition described in Example 1 is added in Examples 4 and 7, and Example 1 5 added the admixture composition described in Example 2, and added the admixture composition described in Example 3 in Example 6. The mixing ratio of each embodiment is shown in Table 4, and the mechanical properties of the mat...

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Abstract

The invention provides an additive composition used for a high-ductility fiber-enhanced cement based composite material. The additive composition comprises, by weight percentage, 20-85% of a rheological adjusting component, 2-30% of a setting and hardening adjusting component, 1-20% of an interlayer bonding strength adjusting component, 4-40% of a volume stabilizer, and 1-10% of a water reducer. The invention further provides a high-ductility fiber-enhanced cement based composite material based on the additive composition. Through optimal design of the additive composition and aggregate, the workability and the setting and hardening speed of a material is adjusted, and the printability, constructability, and the interlayer bonding strength of the high-ductility fiber-enhanced cement based composite material in 3D printing are improved. Compared with a 3D printing building material in the prior art, the composite material shows excellent whole performance. A component made from the composite material can meet the ductility of structural requirements without steel bars, thereby solving the problem that a component made from a 3D printing building material in the prior art is finally broken in a brittle failure manner.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a cement-based composite material admixture, and at the same time relates to a 3D high-ductility fiber-reinforced cement-based composite material and a preparation method thereof. Background technique [0002] 3D printing, that is, Additive Manufacturing (Additive Manufacturing) technology is a technology that uses the method of gradually accumulating materials to manufacture solid parts, also known as Rapid Prototyping or Rapid Manufacturing (Rapid Manufacturing) technology. Since the rise of additive manufacturing in the 1980s, it has developed rapidly and has been hailed as a major innovation and progress in the field of material manufacturing, and is also considered "one of the important symbols of the third industrial revolution". [0003] In recent years, 3D printing technology has begun to be used in the field of construction. Researchers in the United States,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B24/38B33Y70/00
CPCB33Y70/00C04B28/04C04B40/0039C04B2111/00181C04B2201/50C04B14/08C04B18/141C04B24/383C04B2103/0068C04B24/10C04B24/2688C04B22/064C04B2103/302C04B18/146C04B18/101C04B24/38C04B12/04C04B24/06C04B22/142C04B14/062C04B22/148C04B24/243C04B24/26C04B18/08C04B18/142C04B14/14C04B14/48C04B16/0641C04B14/06C04B16/0625C04B14/204C04B14/22C04B14/28C04B14/46C04B14/185
Inventor 周健
Owner 万玉君
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