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Alkali-activated cementitious material for 3D printing

A gelling material and 3D printing technology, which is applied in the direction of additive processing, etc., can solve the problems of too fast setting time and poor fluidity of alkali-induced gelling materials, and achieve the requirements of alleviating shrinkage cracking, short setting time, and ensuring work performance Effect

Inactive Publication Date: 2019-02-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: In view of the shortage of alkali-activated gelling materials in 3D printing application technology, the purpose of this invention is to provide an alkali-activated gelling material for 3D printing, which can improve the alkali-activated gelation from the processing, composition and proportion of raw materials. The material coagulation time is too fast and the fluidity is poor, so that it can meet the technical requirements of 3D printing

Method used

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  • Alkali-activated cementitious material for 3D printing

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A new type of alkali-activated gelling material for 3D printing, the mass percentage of each component of the raw material is 46% of ground fine-grained blast furnace slag, and the specific surface area is 450m 2 / kg; ferronickel slag 7%, specific surface area 345m 2 / kg; lithium slag 7%, specific surface area 530m 2 / kg; red brick powder 7%, specific surface area 650m 2 / kg; attapulgite 0.45%, fineness 430 mesh; sodium bentonite 0.45%, fineness 320 mesh; sisal fiber 0.1%, diameter 0.12mm, length 8mm; the addition of the alkali activator lithium hydroxide It is 2%, and the addition of described water is 30%.

[0025] Take by weight percentage respectively 46% grinding fine grained blast furnace slag, 7% ferronickel slag, 7% lithium slag and 7% red brick powder, ferronickel slag, lithium slag and 7% red brick powder in this embodiment The red brick powder has not been treated by microwave heating activity excitation, and at the same time, 0.45% attapulgite and 0.45% s...

Embodiment 2

[0027] A new type of alkali-activated gelling material for 3D printing, the mass percentage of each component of the raw material is 46% of ground fine-grained blast furnace slag, and the specific surface area is 450m 2 / kg; nickel-iron slag 7%, specific surface area 345m2 / kg; lithium slag 7%, specific surface area 530m 2 / kg; red brick powder 7%, specific surface area 650m2 / kg; attapulgite 0.45%, fineness 430 mesh; sodium bentonite 0.45%, fineness 320 mesh; sisal fiber 0.1%, diameter 0.12mm, length 8mm; The added amount of the alkali activator lithium hydroxide is 2%, and the added amount of the water is 30%.

[0028] Take by weight percentage respectively 46% grinding fine grained blast furnace slag, 7% ferronickel slag, 7% lithium slag and 7% red brick powder, ferronickel slag, lithium slag and 7% red brick powder in this embodiment The red brick powder has been activated by microwave heating, and at the same time, 0.45% of attapulgite and 0.45% of sodium bentonite are add...

Embodiment 3

[0030] A new type of alkali-activated gelling material for 3D printing, the mass percentage of each component of the raw material is 31% of ground fine-grained blast furnace slag, and the specific surface area is 550m 2 / kg; ferronickel slag 22%, specific surface area 600m 2 / kg; lithium slag 7%, specific surface area 550m2 / kg; red brick powder 7%, specific surface area 700m 2 / kg; attapulgite 0.7%, fineness 450 mesh; sodium bentonite 0.7%, fineness 330 mesh; coconut shell fiber 0.1%, diameter 0.16mm, length 10mm; the addition of the alkali activator lithium hydroxide It is 3.5%, and the addition of described water is 28%.

[0031] Take by weight percentage respectively 31% grinding fine grained blast furnace slag, 22% ferronickel slag, 7% lithium slag and 7% red brick powder, ferronickel slag, lithium slag and The red brick powder has been activated by microwave heating. The microwave heating temperature is 500°C, the power is 800W, and the time is 60 minutes; at the same ...

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Abstract

The invention discloses a novel alkali-activated cementitious material for 3D printing. The novel alkali-activated cementitious material for the 3D printing is prepared from following raw materials inpercentage by weight: 20%-46% of ground granulated blast furnace slag, 7%-22% of nickel iron slag, 7%-14% of lithium slag, 7%-14% of red brick powder, 2%-3.5% of a solid alkali activator, 0.3%-0.7% of attapulgite, 0.3%-0.7% of bentonite, 0.07%-0.14% of plant fiber and 28%-31% of water. The novel alkali-activated cementitious material for the 3D printing has good workability, has good cohesive property and high stability due to the characteristics of quick setting, rapid hardening and early strength and completely meets the material performance requirement of the 3D printing technology.

Description

technical field [0001] The invention belongs to the technical field of building materials and the direction of resource utilization of solid waste, and in particular relates to a novel alkali-activated gelling material for 3D printing. Background technique [0002] 3D printing is an emerging science and technology that developed rapidly in the world in the mid-1980s. Based on digital model files, resin, metal, cement or ceramics are used as bonding materials, and the rapid prototyping method of accumulating and constructing objects is adopted layer by layer. Compared with traditional manufacturing, 3D printing technology can abandon the factory production line, does not require mechanical cutting or molds, can significantly increase productivity, and greatly reduce the time, money and labor costs of product manufacturing. [0003] In recent years, 3D printing technology has developed rapidly and has begun to be used in the field of building materials technology. In addition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00B33Y70/00
CPCB33Y70/00C04B28/006C04B2111/00181C04B2201/05C04B2201/50C04B18/141C04B18/144C04B18/0427C04B14/104C04B14/102C04B18/248C04B22/062
Inventor 张亚梅曹瑞林张超李保亮
Owner SOUTHEAST UNIV
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