Cement-based composite for 3D (three dimensional) building printing and preparation method of cement-based composite

A composite material and 3D printing technology, applied in the field of building materials, to achieve the effect of improving compactness and bonding strength, good fluidity and pumpability, and improving thixotropy

Inactive Publication Date: 2018-01-23
南京嘉翼数字化增材技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the characteristics of the building itself, the building has specific requirements for the construction performance, mechanical properties, functionality, durability and economy of the materials used during the printing and manufacturing process and after the building is completed. As far as the current situation is conc...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a cement-based environmentally friendly composite material for building 3D printing, and its components and component mass percentages are as follows:

[0035] Ordinary portland cement 32%, flow aluminate cement 2%, quartz sand 50%, kaolin 2%, silica fume 2%, polyanthic acid superplasticizer 0.15%, starch ether 0.02, sodium carbonate 0.5%, poly Propylene fiber 0.08%, mixing water 11.25%.

[0036] The above-mentioned 3D printing material preparation method is to mix and stir the above fibers and powdery raw materials except starch ether evenly, add water and then add starch ether, stir to the required consistency at the printing site, then pump it into the hopper of the 3D printer, and supply it at the end of the hopper. Sodium carbonate is added to the feeder, and the printing construction is performed after the second stirring.

[0037] The physical properties of the 3D printed cement-based environmentally friendly composite material in this e...

Embodiment 2

[0039] This embodiment provides a cement-based environmentally friendly composite material for building 3D printing, and its components and component mass percentages are as follows:

[0040] 35% of ordinary portland cement, 2% of flow aluminate cement, 41.7% of quartz sand, 2% of kaolin, 5% of silica fume, 0.2% of polyanthracic high-efficiency superplasticizer, 0.3% of air-entraining agent, and 0.15% of polypropylene fiber %, bentonite 0.5%, mixing water 13.15%.

Embodiment 3

[0043] This embodiment provides a cement-based environmentally friendly composite material for building 3D printing, and its components and component mass percentages are as follows:

[0044] Ordinary Portland cement 28%, sulfoaluminate cement 5%, quartz sand 42%, kaolin 1.5%, silica fume 5%, polyanthic acid superplasticizer 0.25%, polypropylene fiber 0.05%, perlite 2.5% , fly ash 3.7%, mixing water 12%, initial setting time 30min, final setting time 45min. Cubic compressive strength R 3d =40.5MPa,R 28d =52.5MPa, flexural strength R 3d =6.5MPa,R 28d =7.8MPa

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Abstract

The invention discloses an environment-friendly cement-based composite for 3D (three dimensional) building printing. The composite comprises the following raw materials by mass percentage: 25-35% of cement, 2-8% of a reinforced rheologic material, 40-60% of quartz sand, 0.02-0.2% of a mixture improving material, 0.1-0.2% of a water reducer, 8-14% of blended water, 0.05-0.1% of fiber and 0-5% of perlite. Building waste broken powder replaces part of the quartz sand; and the composite is directly conveyed into a 3D building printer for 3D building printer construction by on-site mixing and addition of an accelerator, a thickening rheologic agent and the like into a printing tail end. According to the composite, the building waste and industrial waste can be applied greatly; the composite islow in cost and environmentally friendly; the strength, cost and forming time of the composite can be flexibly controlled; the composite can be used for the 3D printing of common buildings and landscape buildings under different environment scenes and requirements, and meets the requirements on the efficiency under different building strength conditions; and the development, popularization and application of a 3D building printing technology are greatly promoted.

Description

technical field [0001] The invention relates to a cement-based composite material for building 3D printing and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] 3D printing technology is a technology based on digital model files, using bondable materials such as powdered metal or plastic, to construct objects by layer-by-layer printing; compared with traditional construction technology, 3D printing construction technology The advantages are reflected in: the speed can be more than 10 times faster than traditional construction technology; it can manufacture complex and diverse buildings that are difficult to build in traditional methods, and it does not need to use formwork, which reduces construction costs; it does not require a large number of construction workers, which reduces construction costs. safety risks; and reduce waste by-products, can effectively use building materials, greatly reduce the demand fo...

Claims

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Application Information

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IPC IPC(8): C04B28/06B33Y70/00
Inventor 刘培善李进高凌云
Owner 南京嘉翼数字化增材技术研究院有限公司
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