Non-cement-based cementitious material for 3D printing and preparation method of non-cement-based cementitious material

Abstract

The invention relates to the technical field of materials for 3D printing and provides a non-cement-based cementitious material for 3D printing and a preparation method of the non-cement-based cementitious material. The non-cement-based cementitious material is prepared from raw materials including fly ash, slag powder, silica fume, lithium silicate, a polycarboxylate superplasticizer and graphene oxide. When the non-cement-based cementitious material is used actually, an appropriate water-binder ratio can be selected according to actually required setting time and compressive strength to meet different requirements in actual production, so that the non-cement-based cementitious material has a wider application range and a better printing effect; meanwhile, the cost of the raw materials is lower, waste can be recycled and changed into wealth, besides, the production cost and the energy consumption can be effectively reduced in a preparation process, no industrial pollutant is produced in a production process, and accordingly, the invention is an environment-friendly technology with advantages of easily available materials, low raw material cost and production cost, simple preparation method and low energy consumption.

Description

Technical field

[0001] The invention relates to the technical field of materials for 3D printing, and is a non-cement based cementitious material for 3D printing and a preparation method thereof. Background technique

[0002] With the continuous development of science and technology, many new technologies and new materials have emerged. 3D printing technology is one of the best. Its appearance has brought about revolutionary changes in many industries. In the past, the manufacture of high-precision parts and complex structural shapes depended heavily on equipment technology and personnel experience. Now, 3D printers will subvert this view, so that companies no longer rely on the accuracy of production equipment and the work experience of personnel, and no longer consider whether the production process can be realized. No matter how precise parts or complex shapes are, they can be produced by 3D printers. achieve.

[0003] Printing technology integrates advanced technologies such...

Examples

Embodiment 1

[0033] In Example 1, the raw materials of the non-cement-based cementitious material for 3D printing include in parts by mass: 210 to 630 parts of fly ash, 630 to 210 parts of slag powder, 30 to 60 parts of silica fume, silicic acid 50 parts to 100 parts of lithium, 4 parts to 12 parts of polycarboxylic acid water reducing agent, and 0.2 part to 1 part of graphene oxide.

[0034] Among them, fly ash and slag powder are active powder fines. They will undergo hydration reaction under the excitation of lithium silicate to form a gel-like hydration product to play a role in cementing. The degree of reaction is high or low, and the reaction speed is The speed depends entirely on the concentration and amount of lithium silicate, which makes the initial and final setting time and early strength of this cementitious material reach a "controllable" state. On the other hand, fly ash and slag powder are due to their The internal chemical composition is different, the particle shape is diffe...

Embodiment 2

[0035] In Example 2, the raw materials of the non-cement-based cementitious material for 3D printing include in parts by mass: 210 or 630 parts of fly ash, 630 or 210 parts of slag powder, 30 or 60 parts of silica fume, and silicic acid 50 parts or 100 parts of lithium, 4 parts or 12 parts of polycarboxylic acid water reducing agent, 0.2 parts or 1 part of graphene oxide.

Embodiment 3

[0036] Example 3, as an optimization of the above example, the specific surface area of ​​fly ash is 450m 2 / kg or more; or / and, the specific surface area of ​​the slag powder is 450m 2 / kg above.

Technical field

[0001] The invention relates to the technical field of materials for 3D printing, and is a non-cement based cementitious material for 3D printing and a preparation method thereof. Background technique

[0002] With the continuous development of science and technology, many new technologies and new materials have emerged. 3D printing technology is one of the best. Its appearance has brought about revolutionary changes in many industries. In the past, the manufacture of high-precision parts and complex structural shapes depended heavily on equipment technology and personnel experience. Now, 3D printers will subvert this view, so that companies no longer rely on the accuracy of production equipment and the work experience of personnel, and no longer consider whether the production process can be realized. No matter how precise parts or complex shapes are, they can be produced by 3D printers. achieve.

[0003] Printing technology integrates advanced technologies such...

Examples

Embodiment 1

[0033] In Example 1, the raw materials of the non-cement-based cementitious material for 3D printing include in parts by mass: 210 to 630 parts of fly ash, 630 to 210 parts of slag powder, 30 to 60 parts of silica fume, silicic acid 50 parts to 100 parts of lithium, 4 parts to 12 parts of polycarboxylic acid water reducing agent, and 0.2 part to 1 part of graphene oxide.

[0034] Among them, fly ash and slag powder are active powder fines. They will undergo hydration reaction under the excitation of lithium silicate to form a gel-like hydration product to play a role in cementing. The degree of reaction is high or low, and the reaction speed is The speed depends entirely on the concentration and amount of lithium silicate, which makes the initial and final setting time and early strength of this cementitious material reach a "controllable" state. On the other hand, fly ash and slag powder are due to their The internal chemical composition is different, the particle shape is diffe...

Embodiment 2

[0035] In Example 2, the raw materials of the non-cement-based cementitious material for 3D printing include in parts by mass: 210 or 630 parts of fly ash, 630 or 210 parts of slag powder, 30 or 60 parts of silica fume, and silicic acid 50 parts or 100 parts of lithium, 4 parts or 12 parts of polycarboxylic acid water reducing agent, 0.2 parts or 1 part of graphene oxide.

Embodiment 3

[0036] Example 3, as an optimization of the above example, the specific surface area of ​​fly ash is 450m 2 / kg or more; or / and, the specific surface area of ​​the slag powder is 450m 2 / kg above.

Images