CN115010428A

CN115010428A - Building 3D printing material, preparation method and application thereof, and product

Info

Publication number: CN115010428A
Application number: CN202210584640.6A
Authority: CN
Inventors: 陈佳佳; 马义和
Original assignee: Yingchuang New Material Suzhou Co ltd
Current assignee: Yingchuang New Material Suzhou Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-06
Also published as: CN117209222A

Abstract

The application provides a building 3D printing material, a preparation method and application thereof and a 3D product, and relates to the technical field of building 3D printing and waste recycling. A building 3D printing material comprises the following components in parts by weight: 200-400 parts of cement, 400-650 parts of regenerated red brick powder, 1000-1250 parts of regenerated red brick particles, 0.2-1.2 parts of a stabilizer, 0.1-1 part of a binder, 0.1-1.5 parts of a defoaming agent, 0.1-5 parts of fibers and 0-5 parts of a water reducing agent; wherein the particle size of the regenerated red brick powder is smaller than that of the regenerated red brick particles. The building 3D printing material has good strength, meets the requirements of building 3D printing ink pumpability, constructability and the like, uses a large amount of regenerated red brick powder and regenerated red brick particles, changes waste into valuable, can utilize red bricks as resources, and has high economic benefit, environmental benefit and social benefit.

Description

Building 3D printing material, preparation method and application thereof, and product

Technical Field

The application relates to the technical field of building 3D printing and waste recycling, in particular to a building 3D printing material, a preparation method and application thereof and a 3D product.

Background

The 3D printing technology belongs to one of the rapid prototyping technologies, and is a technology for constructing an object by using a powdery bondable material and printing layer by layer on the basis of a digital model file, namely, the technology is a manufacturing technology for finishing a solid structure by overlapping the material layer by layer, and has the advantages of no need of a mold, shortened manufacturing period, reduced cost and the like.

When the 3D printing is applied to the building industry, a material which takes mortar or concrete as a printing ink material is usually sprayed out of a 3D printer nozzle, so that the 3D printing technology is applied to an intelligent construction technology in the field of building engineering. The application of the 3D printing technology in the field of buildings can not only greatly reduce the construction cost and improve the construction efficiency, but also improve the safety, applicability and accuracy of construction, and simultaneously enable a complex construction form to be possible. In order to meet the requirement of 3D printing, mortar (or concrete) needs to have good rheological property and to be able to quickly set in air, and needs to have high plasticity.

Meanwhile, nowadays, the social demand is continuously increased and the consumption level is increasingly improved, the energy shortage becomes a major subject restricting the continuous and coordinated development of economy and society. The energy is saved, the energy consumption is reduced, the resource utilization of wastes is realized, and the method is a difficult task of independency for workers in the related field. Under the background, how to prepare the building energy-saving and environment-friendly 3D printing material, considering the environmental and economic benefits of the building material and considering the characteristics of high strength, good rheological property, strong plasticity and the like of the building 3D printing material is a hotspot problem in the field.

In addition, due to urban construction and transformation in China, a large amount of waste red bricks are discarded as construction waste, so that the environment is polluted, land resources are occupied, and the recycling cost is high. How to effectively and comprehensively utilize waste resources and change waste into valuable becomes a problem which is urgently needed to be solved by industry workers.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a building 3D printing material, a preparation method and application thereof and a 3D product, which have the characteristics of higher strength and difficult collapse or brittle failure; meanwhile, a large amount of the regenerated red brick powder and the regenerated red brick particles are used in the building 3D printing material, so that waste resources can be recycled, the cost is reduced, and the building 3D printing material has high environmental benefit and social benefit.

According to one aspect of the application, the building 3D printing material comprises the following components in parts by weight:

200-420 parts of cement, 300-650 parts of regenerated red brick powder, 1000-1250 parts of regenerated red brick particles, 0.2-1.2 parts of a stabilizer, 0.1-1 part of a binder, 0.1-1.5 parts of a defoaming agent, 0.1-5 parts of fibers and 0-5 parts of a water reducing agent;

wherein the particle size of the regenerated red brick powder is smaller than that of the regenerated red brick particles.

In one possible embodiment, the architectural 3D printed material comprises the following components in parts by weight: 220-410 parts of cement, 410-600 parts of regenerated red brick powder, 1000-1230 parts of regenerated red brick particles, 0.2-1 part of stabilizer, 0.2-1 part of binder, 0.1-1 part of defoamer, 0.5-3.5 parts of fiber and 0.1-4 parts of water reducer.

In one possible embodiment, the architectural 3D printed material comprises the following components in parts by weight: 250-350 parts of cement, 450-550 parts of regenerated red brick powder, 1000-1200 parts of regenerated red brick particles, 0.5-1 part of stabilizer, 0.3-0.8 part of binder, 0.2-0.7 part of defoamer, 1-2.5 parts of fiber and 0.3-3 parts of water reducer.

In one possible embodiment, the recycled red brick powder is in the micro-scale or nano-scale, and/or the recycled red brick particles are in the millimeter-scale.

In one possible embodiment, the particle size range of the regenerated red brick powder is less than or equal to 100 μm, and more preferably less than or equal to 75 μm.

In one possible embodiment, the particle size of the recycled red brick particles is in the range of ≦ 5mm, more preferably ≦ 3 mm.

In one possible embodiment, the preparation method of the recycled red brick powder comprises the following steps: crushing the waste red bricks in the building, and then ball-milling the crushed red bricks into powder with the particle size of less than or equal to 100 mu m to obtain the regenerated red brick powder.

In one possible embodiment, the preparation method of the recycled red brick particles comprises the following steps: crushing the waste red bricks into particles with the particle size of less than or equal to 5mm to obtain the regenerated red brick particles.

In one possible embodiment, the architectural 3D printing material further includes an active material including at least one of silica fume, fly ash, or mineral fines.

In a possible embodiment, the weight parts of the silica fume is 0-150 parts, the weight parts of the fly ash is 0-200 parts, and the weight parts of the mineral powder is 0-300 parts.

In one possible embodiment, the architectural 3D printing material further comprises a thickening agent, the thickening agent comprising a starch ether.

Preferably, the weight part of the thickening agent is 0.1-1 part.

In one possible embodiment, the cement includes at least one of portland cement, slag cement, sulphoaluminate cement, or aluminate-modified portland cement.

In one possible embodiment, the cement is white cement and/or grey cement, preferably grey cement.

In one possible embodiment, the stabilizer comprises at least one of diatomaceous earth, methyl hydroxyethyl cellulose ether, methyl cellulose, methyl hydroxypropyl cellulose ether, lignocellulose, CMC cellulose or HPMC cellulose, preferably HPMC cellulose.

In one possible embodiment, the binder includes at least one of latex powder, resin or polyvinyl alcohol, preferably latex powder.

In one possible embodiment, the fibers comprise at least one of polypropylene fibers, polyethylene fibers, alkali-resistant glass fibers, alkali-resistant chopped glass fibers, or basalt fibers, preferably alkali-resistant chopped glass fibers.

According to another aspect of the application, a preparation method of an architectural 3D printing material is provided, where the architectural 3D printing material is the architectural 3D printing material, and the preparation method includes:

and mixing and stirring the cement, the regenerated red brick powder, the regenerated red brick particles, the stabilizer, the binder, the defoamer, the fibers and the water reducer to be uniform to obtain the building 3D printing material.

In one possible embodiment, cement, recycled red brick powder, recycled red brick particles, a stabilizer, a binder, a defoamer, fibers, a water reducer, a thickener, and optionally an active material are mixed and stirred to homogeneity, resulting in a building 3D printed material.

In one possible embodiment, the stirring time is 5 to 90min, and/or the stirring temperature is 20 to 50 ℃.

According to a further aspect of the application, there is provided a use of the architectural 3D printed material or the method as described above in the field of 3D printed buildings.

According to still another aspect of the application, a 3D product printed by the building 3D printing material or the building 3D printing material prepared by the method is provided.

The above embodiments can be combined arbitrarily without departing from the spirit and scope of the present invention, based on common general knowledge in the field.

Compared with the prior art, the invention has the following remarkable advantages and effects:

according to the invention, the components and the proportion of the components for forming the building 3D printing material are limited, so that the 3D printing material which is high in strength, not easy to collapse or brittle failure and good in bonding performance is obtained. According to the building 3D printing material, the recycled red brick powder is used for replacing the existing partial cementing material or active material such as cement or mineral powder or fly ash, the recycled red brick particles are used for replacing the existing aggregate such as sand, and a certain amount of cement, a stabilizing agent, a binding agent, a defoaming agent, fiber, a water reducing agent and the like are matched, through mutual matching of the components, the material has strong cohesiveness, so that the material has good strength and pumping performance, and the requirements of pumpability, extrudability and constructability of printing ink are met, so that the building 3D printing requirement can be met. Meanwhile, the invention uses a large amount of regenerated red brick powder and regenerated red brick particles, can improve the utilization rate of the red brick powder and the red brick particles (fine aggregate) to at least 85 percent, changes waste into valuable, not only can carry out resource utilization on the red bricks, greatly reduces the utilization rate of clay, but also can reduce the utilization rate of energy and the emission of carbon, can be repeatedly utilized to become raw materials of buildings, considers the resource recycling of wastes, and has higher economic benefit, environmental benefit and social benefit.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it should be apparent that the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those skilled in the art without any creative effort based on the technical solutions and the given embodiments provided in the present application belong to the protection scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For numerical ranges, one or more new numerical ranges may be obtained by combining the individual values, or by combining the individual values.

In the description of the present application, use of the term "at least one of," "at least one of," or other like terms to connote any combination of items listed. For example, if item A, B is listed, the phrase "at least one of A, B" means only a; only B; or A and B. In another example, if item A, B, C is listed, the phrase "at least one of A, B, C" means a only; or only B; only C; a and B (excluding C); a and C (excluding B); b and C (excluding A); or A, B and C. Item a may comprise a single element or multiple elements. Item B may comprise a single element or multiple elements. Item C may comprise a single element or multiple elements.

The red brick is a sintered building brick which is made by using clay, shale, coal gangue and the like as raw materials, crushing, mixing and kneading the raw materials, then manually or mechanically pressing and forming the raw materials, drying the raw materials and then firing the dried raw materials at the temperature of about 900 ℃ by using oxidizing flame, and belongs to inorganic non-metallic materials. The red brick is used as a common building material and has been widely used in China for decades, and the red brick can support a high-rise building and cause certain harm to the environment. The production of the red brick belongs to the industries with high energy consumption, high pollution and low intensification, because the production of the red brick has high energy consumption and severe environmental pollution, and a large amount of clay is consumed, so that certain environmental pollution can be caused; in addition, since the building has a certain life span, red bricks are continuously polluted by new environment from production to abandonment. The waste red brick is a waste brick block in red brick production or a waste red brick produced after a building is dismantled, and is common solid waste in the building industry. In recent years, a large amount of waste red bricks are generated, and are generally discarded or buried as construction wastes, so that the method occupies land, pollutes the environment, and how to effectively recycle the waste red bricks comprehensively and turn waste into wealth is a problem worthy of research.

In view of this, this application uses useless red brick to building 3D printing material field, utilizes abandonment red brick to replace partial cement and sand, is used for preparing building 3D printing material, has not only reduced the price, has avoided environmental pollution, also provides new way for useless rational utilization of red brick in addition, has filled the blank of useless red brick application in building 3D printing material field. The specific technical scheme is described in the following.

In some embodiments of the present application, there is provided an architectural 3D printed material comprising, in parts by weight:

200-420 parts of cement, 400-650 parts of regenerated red brick powder, 1000-1250 parts of regenerated red brick particles, 0.2-1.2 parts of a stabilizer, 0.1-1 part of a binder, 0.1-1.5 parts of a defoaming agent, 0.1-5 parts of fibers and 0-5 parts of a water reducing agent;

According to the technical scheme provided by the embodiment of the invention, the waste red bricks generated after the building is dismantled are treated to obtain the regenerated red bricks, for example, the waste red bricks are crushed and then used in a grading manner, the regenerated red brick particles with a certain particle size can be used as fine aggregate, and the regenerated red brick powder with a smaller relative particle size can be used for replacing part of cement or mineral powder or fly ash, that is, at least two regenerated red brick materials with different particle sizes can be applied to a 3D printing material of the building and used as a raw material for 3D printing of the building. Therefore, the building 3D printing material containing the recycled red brick powder and the recycled red brick particles can improve the utilization rate of the red brick powder and the red brick particles (fine aggregate) to at least 85% under the condition of meeting different strength requirements, changes waste into valuable, can not only recycle red bricks, greatly reduce the utilization of clay, but also reduce the utilization of energy, reduce the emission of carbon, can be recycled to become raw materials of buildings, takes the resource recycling of waste into consideration, and has higher economic benefit, environmental benefit and social benefit.

Moreover, the building 3D printing material provided by the invention has the advantages that through the mutual cooperation of proper and proper amounts of cement, regenerated red brick powder, regenerated red brick particles, a stabilizer, a binder, a defoaming agent, fibers, a water reducing agent and the like, under the mutual cooperation and support of functions of raw material components and mutual restriction and collocation among proportions, the relevant performance of the building 3D printing material is improved, for example, the 3D printing material has better strength and pumping performance, is stronger in cohesiveness and not easy to collapse, and meets the requirements of the pumping performance, the extrusion performance and the constructability of 3D printing ink, so that the requirement of building 3D printing can be met.

Herein, percentages, ratios or parts referred to are by weight unless otherwise indicated. The term "part by weight" as used herein means the basic unit of measurement in the relationship of the weight proportions of the components, and 1 part may represent an arbitrary unit weight, and 1 part may represent 1g, 1.68g, 5g, or the like, for example.

According to the embodiment of the application, the building 3D printing material comprises cement, wherein the cement is 200-420 parts by weight, and the cement can be 200 parts, 205 parts, 210 parts, 220 parts, 240 parts, 260 parts, 280 parts, 300 parts, 350 parts, 380 parts, 400 parts, 410 parts, 420 parts and any value in a range formed by any two of the values. The cement can be used as a cementing material, is a powdery hydraulic inorganic cementing material, can be hardened in air or better in water after being added with water and stirred into slurry, and can firmly bond materials such as sand, aggregate and the like together.

According to the embodiment of the application, the building 3D printing material comprises 300-650 parts of recycled red brick powder, typically, but not limited to, 300 parts, 310 parts, 380 parts, 400 parts, 410 parts, 420 parts, 450 parts, 460 parts, 500 parts, 510 parts, 520 parts, 550 parts, 600 parts, 650 parts and any value in a range formed by any two of the values. The regenerated red brick powder can be used as an active mineral admixture of a 3D printing material, can be mixed with clinker powder to prepare cement due to large specific surface area and good activity, can be used as an admixture to replace part of cement to be directly doped into the 3D printing material, can produce a high-performance 3D printing material with excellent performance, reduces the cost of the cement and the 3D printing material, provides an effective way for preparing a green high-performance 3D printing material, and realizes the comprehensive utilization of waste red brick resource and high-valued waste red brick.

According to the embodiment of the application, the building 3D printing material comprises recycled red brick particles, the particle size of the recycled red brick powder is smaller than that of the recycled red brick particles, the weight part of the recycled red brick particles is 1000-1250 parts, and the typical but non-limiting values can be any value in the range formed by 1000 parts, 1100 parts, 1150 parts, 1180 parts, 1200 parts, 1210 parts, 1220 parts, 1230 parts, 1240 parts and 1250 parts and any two of the values. The recycled red brick particles can replace traditional fine aggregates such as sand and the like, and are used as granular loose materials which can play a role in framework or filling in 3D printing materials.

According to the embodiment of the application, the building 3D printing material comprises a stabilizer in an amount of 0.2 to 1.2 parts by weight, and typically, but not limited to, for example, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 1.1 part, 1.2 part, and any value in a range formed by any two of the above points. The stabilizer can be used for improving the dispersibility of cement and aggregates such as recycled red brick particles and greatly improving the plasticity and water-retaining property of the building 3D printing material or mortar. Can also be used as a water-retaining agent and a retarder of cement mortar to ensure that the mortar has pumpability.

According to the embodiment of the application, the building 3D printing material comprises a binder, and the weight part of the binder is 0.1-1 part, and typically, but not limited to, for example, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, and any value in a range formed by any two of the above points. The adhesive can be used for improving the adhesive force, the breaking strength, the plasticity, the wear resistance and the construction performance of the building 3D printing material, and does not have any adverse effect on the fluidity, the thixotropy, the water retention property and the like of the material. In addition, the binder can be compatible with various mortar additives for achieving certain special properties.

According to the embodiment of the present application, the building 3D printing material includes an antifoaming agent in an amount of 0.1 to 1.5 parts by weight, and typically, but not limited to, for example, 0.1 part, 0.12 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 1.2 part, 1.5 part, and any value in a range of any two of these points. The defoamer is mainly designed aiming at the foaming characteristic in the cement mortar stirring process, and the cement mortar defoamer can effectively control the generation of foam in a cement mortar system, so that the finally prepared member is more compact and bright.

According to the embodiment of the application, the building 3D printing material comprises fibers, and the weight part of the fibers is 0.1-1.5 parts, and typically, but not limited to, for example, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0, 9 parts, 1 part, 1.2 parts, 1.4 parts, 1.5 parts, and any value in a range formed by any two of the point values. The fiber adopted by the embodiment has good alkali resistance, can effectively resist the erosion of high-alkali substances in cement, has strong bond stress, high elastic modulus, impact resistance, tensile strength and bending strength, strong non-combustion, anti-freezing, temperature and humidity change resistance and excellent anti-cracking and anti-permeability performance, has the characteristics of strong designability, easy forming and the like, and belongs to a novel environment-friendly reinforcing material.

According to the embodiment of the application, the building 3D printing material comprises a water reducing agent, wherein the water reducing agent is 0-5 parts by weight, and typically, but not limited to, 0 part, 0.1 part, 0.2 part, 0.4 part, 0.5 part, 0.6 part, 0.8 part, 1 part, 1.2 part, 1.5 part, 2 parts, 2.5 parts, 3 parts, 4 parts, 5 parts and any value in a range formed by any two of the point values. The water reducing agent has the effect of reducing water and dispersing, and can reduce the residual admixture of the mixing water consumption under the condition of maintaining the constant slump of the building 3D printing material or mortar. After the mortar mixture is added, the cement particles are dispersed, the workability of the cement particles can be improved, the unit water consumption is reduced, and the fluidity of the mortar mixture is improved.

It will be appreciated that the water reducing agent is an optional water reducing agent, i.e. it may or may not be added. Preferably, a small amount of water reducing agent is added into the building 3D printing material.

According to some embodiments of the invention, the building 3D printing material can have good strength and pumping performance by adjusting the types and proportions of the raw material components and cooperating with other components, and by making the components within the above range, the building 3D printing material can meet the requirements of 3D printing ink pumpability, extrudability and constructability, and has stable performance. Specifically, the above components in the building 3D printing material are determined by comprehensively considering the contributions of the raw material components to the performance indexes of the building 3D printing material, such as strength, moldability, stability, and the like, and the cooperativity of the whole system, and by utilizing the synergistic cooperation of the cement, the recycled red brick powder, the recycled red brick particles, the stabilizer, the binder, the defoamer, the fibers and the water reducer with the above specific contents, various performances are balanced, so that the prepared building 3D printing material has good strength, pumping performance and binding performance, and the cost can be reduced while achieving the performance indexes.

It should be noted that the architectural 3D printing material of the present invention may be used as a dry powder in a mortar for architectural 3D printing, that is, the mortar for architectural 3D printing may include the architectural 3D printing material provided by the present invention and a solvent, and the solvent may be, for example, water. Architectural 3D printed materials (i.e., dry powders) are the primary solid substance for architectural 3D printed materials.

Optionally, the water in the mortar for building 3D printing may be deionized water or ordinary tap water.

Optionally, in the mortar for building 3D printing, the addition amount (by weight) of water may be 12% to 20% of the building 3D printing material (dry powder), further may be 13% to 18%, further may be 14% to 16%; typical but non-limiting examples are 12%, 13%, 14%, 14.5%, 15%, 15.5%, 16%, 18%, and any value in the range of any two of these values. Water is the primary solvent for dispersing the solute. In addition, in other embodiments, the addition amount of water in the mortar can be adjusted according to actual conditions, and the amount of water used in this embodiment is not limited.

In some embodiments, the architectural 3D printing material comprises the following components in parts by weight: 220-410 parts of cement, 410-600 parts of regenerated red brick powder, 1000-1230 parts of regenerated red brick particles, 0.2-1 part of stabilizer, 0.2-1 part of binder, 0.1-1 part of defoamer, 0.5-3.5 parts of fiber and 0.1-4 parts of water reducer.

In some embodiments, the architectural 3D printed material comprises the following components in parts by weight: 250-350 parts of cement, 450-550 parts of regenerated red brick powder, 1000-1200 parts of regenerated red brick particles, 0.5-1 part of stabilizer, 0.3-0.8 part of binder, 0.2-0.7 part of defoamer, 1-2.5 parts of fiber and 0.3-3 parts of water reducer.

By reasonably adjusting and optimizing the content of each component in the building 3D printing material, the synergistic cooperation effect among the components is fully exerted, the strength, the pumping performance, the bonding performance or the comprehensive performance of the building 3D printing material are further improved, and meanwhile, the production cost of the building 3D printing material is reduced.

The recycled red brick materials with different particle sizes, namely the recycled red brick powder and the recycled red brick particles, contained in the building 3D printing material can be used for more fully utilizing red brick resources. The regenerated red brick powder can be used as an active mineral admixture of a 3D printing material, can be mixed with clinker powder to prepare cement due to large specific surface area and good activity, can be used as an additive to replace part of cement to be directly doped into the 3D printing material, can produce a high-performance 3D printing material with excellent performance, reduces the cost of the cement and the 3D printing material, provides an effective way for preparing a green high-performance 3D printing material, and realizes the comprehensive utilization of waste red brick resources and high-valued materials. In some embodiments, the recycled red brick powder is micro-sized or nano-sized. In some embodiments, the recycled red brick powder has a particle size in the range of 100 μm or less, more preferably 75 μm or less. Illustratively, the particle size of the recycled red brick powder can be 100 μm, 90 μm, 85 μm, 80 μm, 75 μm, 70 μm, 65 μm, 60 μm, 50 μm, 40 μm, 30 μm, 20 μm, etc., and the present embodiment is not limited to the specific particle size of the recycled red brick powder. Preferably, in practical application, the regenerated red brick powder can be obtained by screening with a sieve of about 200 meshes.

In some embodiments, the method for preparing the recycled red brick powder comprises the following steps: crushing the waste red bricks, and then performing ball milling (or grinding) to obtain powder with the particle size of less than or equal to 100 mu m, particularly to obtain regenerated red brick powder with the particle size of less than or equal to 75 mu m. In addition, when the regenerated red brick powder is prepared, the steps of pretreatment or light substance treatment and the like can be further included to remove impurities.

The particle size of the regenerated red brick particles is larger than that of the regenerated red brick powder, the regenerated red brick particles can replace traditional fine aggregates such as sand, the fine aggregates are aggregates with relatively smaller diameters compared with coarse aggregates, and the regenerated red brick particles can be used as granular loose materials which can play a role in framework or filling in 3D printing materials. In some embodiments, the recycled red brick particles are in the millimeter scale. In some embodiments, the recycled red brick particles have a particle size in the range of 5mm or less, more preferably 3mm or less. For example, the particle size of the regenerated red brick particles can be 5mm, 4.75mm, 4.5mm, 4mm, 3.5mm, 3mm, 2.75mm, 2.5mm, 2mm, 1.5mm, 1mm, etc., and the specific particle size of the regenerated red brick particles is not limited in this embodiment.

In some embodiments, the method of making the recycled red brick particles comprises: the waste red bricks of the building are crushed into particles with the particle size of less than or equal to 5mm, particularly into particles with the particle size of less than or equal to 3mm, and the regenerated red brick particles are obtained. In addition, when the regenerated red brick particles are prepared, the steps of pretreatment or light substance treatment and the like can be further included to remove impurities.

In some embodiments, the architectural 3D printing material can further include an active material including at least one of silica fume, fly ash, or mineral fines.

It can be understood that the recycled red brick powder of this embodiment can be used as an active material (also referred to as an active admixture), and therefore, the silica fume, the fly ash or the mineral powder is optional, that is, one or more of the silica fume, the fly ash or the mineral powder may be added to the building 3D printing material, or none of them may be added. In general, the active admixture is used for improving the performance of concrete, saving water, adjusting the strength grade of the concrete, and adding natural or artificial powdery mineral substances capable of improving the performance of the concrete during the mixing of the concrete.

Optionally, the silica fume is 0-150 parts by weight, the fly ash is 0-200 parts by weight, and the mineral powder is 0-300 parts by weight. Further, the weight parts of the silica fume are 5-105 parts, the weight parts of the fly ash are 5-150 parts, and the weight parts of the mineral powder are 5-200 parts. Further, the weight parts of the silica fume are 50-105 parts, the weight parts of the fly ash are 20-100 parts, and the weight parts of the mineral powder are 50-150 parts.

The silica fume, fly ash or mineral powder can be of various conventional types commonly used in the field and applicable to building 3D printing materials, and the specific type or source of the silica fume, fly ash or mineral powder is not strictly limited in this embodiment. For example, the ore fines may be a general term for engineered stone fines and their substitutes, which are the product of the comminution process of the ore. The fly ash can be fine ash collected from flue gas generated after coal combustion, and is main solid waste discharged from a coal-fired power plant.

In some embodiments, the architectural 3D printing material further comprises a thickening agent comprising a starch ether. Alternatively, the starch ether may be carboxymethyl starch ether, and of course, other types of starch ethers may also be used, which is not limited in this embodiment.

Optionally, the weight part of the thickener is 0.1-1 part. Further, the weight part of the thickening agent is 0.2-0.8 part. Further, the weight part of the thickening agent is 0.3-0.6.

According to the embodiment of the application, the building 3D printing material may include a thickener, the thickener may be starch ether, and the weight part of the thickener is 0.1 to 1 part, and may be, for example, typically but not limited to, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0, 9 part, 1 part, and any value in a range formed by any two of the above points. The starch ether adopted by the embodiment has very good quick thickening capacity, medium viscosity, higher water retention and small dosage, and can achieve very high effect by very low addition amount; the anti-sagging capability of the material can be improved; has good lubricity, and can improve the operation performance of the material and make the operation smoother.

In some specific embodiments, the architectural 3D printed material comprises the following components in parts by weight: 200-420 parts of cement, 300-650 parts of regenerated red brick powder, 1000-1250 parts of regenerated red brick particles, 0.2-1.2 parts of a stabilizer, 0.1-1 part of a binder, 0.1-1.5 parts of a defoaming agent, 0.1-5 parts of fibers, 0-5 parts of a water reducing agent, 0-150 parts of silica fume, 0-200 parts of fly ash, 0-300 parts of mineral powder and 0.1-1 part of a thickening agent starch ether. In some specific embodiments, the building 3D printing material comprises, by weight, 220-410 parts of cement, 410-600 parts of regenerated red brick powder, 1000-1230 parts of regenerated red brick particles, 0.2-1 part of a stabilizer, 0.2-1 part of a binder, 0.1-1 part of an antifoaming agent, 0.5-3.5 parts of fibers, 0.1-4 parts of a water reducing agent, 0-105 parts of silica fume, 0-150 parts of fly ash, 0-200 parts of mineral powder and 0.2-8 parts of a thickener starch ether.

In the building 3D printing material, cement is a powdery hydraulic inorganic cementing material, and the powdery hydraulic inorganic cementing material is added with water and stirred to form slurry which can be hardened in the air or better in water and can firmly bond materials such as sand, aggregate and the like together. In this example, the type of cement is not limited, and any commercially available cement can be used. In some embodiments, the cement includes at least one of portland cement, slag cement, sulphoaluminate cement, or aluminate-modified portland cement. Typical but non-limiting cements are for example: portland cement, slag cement, sulphoaluminate cement or aluminate-modified portland cement, white cement or grey cement, and the like.

In some embodiments, the cement is white cement and/or grey cement. Preferably, in some embodiments, the cement is a cement.

In addition, in other embodiments, the cement is not limited to the above listed types, and other types of cement may be adopted in the case of meeting the requirements of better strength, pumping performance and the like of the 3D printing of the building, and are not described in detail herein.

In the building 3D printing material, the stabilizer can be used for improving the dispersibility of cement and aggregates such as recycled red brick particles, and greatly improving the plasticity and water retention of the building 3D printing material or mortar; can also be used as a water-retaining agent and a retarder of cement mortar to ensure that the mortar has pumpability. In this example, the kind of the stabilizer is not limited, and any commercially available cement can be used. In some embodiments, the stabilizing agent comprises at least one of diatomaceous earth, methyl hydroxyethyl cellulose ether, methyl cellulose, methyl hydroxypropyl cellulose ether, lignocellulose, CMC cellulose, or HPMC cellulose. For example, diatomaceous earth, methylhydroxyethyl cellulose ether, methylcellulose, methylhydroxypropyl cellulose ether, lignocellulose, CMC cellulose, HPMC cellulose and the like can be used as the stabilizer. Preferably, in some embodiments, HPMC cellulose is used as the stabilizer. The water retention performance of the hydroxypropyl methyl cellulose HPMC ensures that the pulp does not crack due to drying too fast after output, and the strength after hardening is enhanced.

In addition, in other embodiments, the stabilizer is not limited to the above-mentioned ones, and other types of stabilizers may be used to meet the requirements of better strength and pumping performance of architectural 3D printing, and will not be described in detail herein.

In the building 3D printing material, the adhesive is the guarantee of the adhesive strength between the abrasive and the substrate, can be used for improving the adhesive force, the breaking strength, the plasticity, the wear resistance and the construction performance of the building 3D printing material, and does not generate any adverse effect on the fluidity, the thixotropy, the water retention property and the like of the material. In addition, the binder may be well compatible with various mortar additives for achieving certain specific properties. In some embodiments, the binder includes, but is not limited to, at least one of latex powder, resin, or polyvinyl alcohol. Preferably, in some embodiments, the binder is latex powder. The latex powder may be redispersible latex powder, which is not limited in this embodiment.

In addition, in other embodiments, the adhesive is not limited to the above-mentioned ones, and other types of adhesives may be used to meet the requirements of better strength and pumping performance of architectural 3D printing, and will not be described in detail herein.

In the building 3D printing material, the fiber is a material for enhancing the strength and the anti-seepage performance of concrete, and the fiber technology is combined with the concrete technology, so that the steel fiber and the synthetic fiber which can improve the performance of the concrete and the quality of civil engineering can be developed. In some embodiments, the fibers comprise at least one of polypropylene fibers, polyethylene fibers, alkali resistant glass fibers, alkali resistant chopped glass fibers, or basalt fibers. Preferably, in some embodiments, the fibers are alkali-resistant chopped strand glass fibers. The alkali-resistant glass fiber, also known as AR glass fiber, has good alkali resistance, can effectively resist the erosion of high-alkali substances in cement, has strong bond stress, high elastic modulus, impact resistance, tensile strength and bending strength, strong non-combustibility, freezing resistance, temperature resistance and humidity change resistance, excellent crack resistance and impermeability, has the characteristics of strong designability, easy molding and the like, and is a novel green environment-friendly reinforcing material widely applied to high-performance reinforced (cement) concrete.

In addition, in other embodiments, the fibers are not limited to the above listed ones, and the fibers may be of other types in case of meeting the requirements of better strength, pumping performance and the like of architectural 3D printing, and are not described in detail herein.

In the building 3D printing material, the defoaming agent can effectively control the generation of foam in a cement mortar system, so that the finally prepared member is more compact and bright. The water reducing agent is a concrete admixture capable of reducing the mixing water consumption under the condition of keeping the slump of concrete basically unchanged, and most of the water reducing agent belongs to an anionic surfactant. The embodiment of the invention does not strictly limit the specific types or sources of the defoaming agent and the water reducing agent, and the defoaming agent and the water reducing agent can adopt any defoaming agent and water reducing agent which can be applied to the building 3D printing material. Illustratively, the defoamer can be a concrete specific defoamer. The water reducing agent may be a polycarboxylic acid type water reducing agent, or the water reducing agent may be a lignosulfonate salt, a β -methylnaphthalene sulfonate polycondensate, a melamine formaldehyde polycondensate, or the like.

In some embodiments, the mortar for architectural 3D printing includes an architectural 3D printing material (i.e., dry powder) and a solvent (e.g., water), and the amount of water added (by weight) may be 12% to 20% of the architectural 3D printing material (dry powder), i.e., the weight ratio of the solvent to the dry powder may be 12% to 20%, further may be 13% to 18%, further may be 14% to 16%. By optimizing the proportion of the dry powder to the solvent, the water-cement ratio can be further optimized, so that the moisture content can better match the slump and strength requirements of 3D printing on the material. In some embodiments, the architectural 3D printed material comprises, in weight percent: 10-20% of cement, 20-30% of regenerated red brick powder, 50-60% of regenerated red brick particles, 0.02-0.06% of stabilizer, 0.01-0.05% of binder, 0.1-0.3% of defoamer, 0.05-0.2% of fiber, 0-1% of water reducer, 0-5% of silica fume, 0-10% of fly ash, 0-15% of mineral powder and 0.01-0.05% of thickener starch ether.

In some embodiments of the present application, there is provided a preparation method of an architectural 3D printed material, where the architectural 3D printed material is the architectural 3D printed material described above, the preparation method includes:

and mixing and stirring the cement, the regenerated red brick powder, the regenerated red brick particles, the stabilizer, the binder, the defoaming agent, the fibers and the water reducing agent uniformly to obtain the building 3D printing material.

Optionally, mixing and stirring at least one of cement, recycled red brick powder, recycled red brick particles, a stabilizer, a binder, a defoaming agent, fibers, a water reducing agent, a thickening agent and an optional active material such as silica fume, fly ash or mineral powder until the mixture is uniform, so as to obtain the building 3D printing material.

According to the preparation method of the building 3D printing material, the components with proper content are uniformly mixed, the process is simple, the operation is easy, and the preparation method is suitable for industrial mass production.

Optionally, the stirring time is 5-90 min, and/or the stirring temperature is 20-50 ℃. In practical application, the specific stirring time and stirring temperature can be adjusted according to actual conditions.

In addition, when mortar for building 3D printing is prepared, the building 3D printing material can be mixed with water and uniformly stirred, and the mortar for building 3D printing can be obtained

In some embodiments of the present application, there is also provided a use of the architectural 3D printed material or the method as described above in the field of 3D printed buildings.

In some embodiments of the present application, there is also provided a 3D product printed by the architectural 3D printed material or the architectural 3D printed material prepared by the method as described above.

The 3D product has the same advantages as the building 3D printing material, such as higher strength, difficult collapse or brittle failure and better bonding property of the 3D product.

In order to fully explain the relevant performance of the building 3D printing material provided by the application and facilitate understanding of the invention, a plurality of groups of experimental verifications are carried out in the application. The present invention will be further described with reference to specific examples and comparative examples. Those skilled in the art will appreciate that only some of the examples described herein are within the scope of the present application and that any other suitable specific examples are within the scope of the present application.

Example 1

The building 3D printing material comprises the following components in parts by weight:

410 parts of cement, 410 parts of regenerated red brick powder, 1230 parts of regenerated red brick particles, 0.5 part of a stabilizer, 0.3 part of a thickener, 0.3 part of a binder, 0.12 part of a defoaming agent, 1.5 parts of fibers and 0.6 part of a water reducing agent.

Wherein the cement is cement ash; the regenerated red brick powder is powder with the particle size of less than or equal to 75 mu m which is obtained by crushing the building waste red bricks and then ball-milling the crushed red bricks; the regenerated red brick particles are particles obtained by crushing the waste red bricks of the building into particles with the particle size of less than or equal to 5 mm; the stabilizer is HPMC cellulose; the thickening agent is starch ether; the binder is latex powder; the defoamer is a defoamer special for concrete, and the water reducer is a polycarboxylic acid water reducer; the fiber is alkali-resistant chopped glass fiber.

The preparation method of the building 3D printing material comprises the following steps: and mixing and stirring the cement, the regenerated red brick powder, the regenerated red brick particles, the stabilizer, the thickening agent, the binder, the defoaming agent, the fibers and the water reducing agent in proportion until the mixture is uniform to obtain the building 3D printing material.

Example 2

410 parts of cement, 310 parts of regenerated red brick powder, 100 parts of mineral powder, 1230 parts of regenerated red brick particles, 0.5 part of stabilizer, 0.3 part of thickener, 0.3 part of binder, 0.12 part of defoamer, 1.5 parts of fiber and 0.6 part of water reducer.

The rest was the same as in example 1.

Example 3

The aqueous dye ink comprises the following components in percentage by weight:

260 parts of cement, 460 parts of regenerated red brick powder, 50 parts of silica fume, 28 parts of fly ash, 22 parts of mineral powder, 1230 parts of regenerated red brick particles, 0.5 part of stabilizer, 0.3 part of thickener, 0.3 part of binder, 0.12 part of defoamer, 1.5 parts of fiber and 0.6 part of water reducer.

The rest is the same as in example 1.

Example 4

The aqueous dye ink comprises the following components in percentage by weight:

205 parts of cement, 513 parts of regenerated red brick powder, 102 parts of silica fume, 1230 parts of regenerated red brick particles, 0.5 part of stabilizing agent, 0.3 part of thickening agent, 0.3 part of binding agent, 0.12 part of defoaming agent, 1.5 parts of fiber and 0.6 part of water reducing agent.

The rest is the same as in example 1.

Example 5

300 parts of cement, 550 parts of regenerated red brick powder, 1250 parts of regenerated red brick particles, 1.2 parts of a stabilizer, 0.8 part of a thickening agent, 0.8 part of a binder, 0.6 part of a defoaming agent, 3.5 parts of fibers and 2 parts of a water reducing agent.

Wherein the cement is cement ash; the regenerated red brick powder is powder with the particle size of less than or equal to 100 mu m which is obtained by crushing the building waste red bricks and then ball-milling the crushed red bricks; the regenerated red brick particles are particles obtained by crushing the building waste red bricks into particles with the particle size of less than or equal to 3 mm; the stabilizer is HPMC cellulose; the thickening agent is starch ether; the binder is latex powder; the defoamer is a defoamer special for concrete, and the water reducer is a polycarboxylic acid water reducer; the fiber is alkali-resistant chopped glass fiber.

Example 6

420 parts of cement, 300 parts of regenerated red brick powder, 30 parts of silica fume, 1250 parts of regenerated red brick particles, 1.0 part of stabilizing agent, 1.0 part of thickening agent, 1.0 part of binder, 1.5 parts of defoaming agent, 5 parts of fiber and 5 parts of water reducing agent.

Wherein the cement is cement ash; the regenerated red brick powder is powder with the particle size of less than or equal to 75 mu m which is obtained by crushing the building waste red bricks and then ball-milling the crushed red bricks; the regenerated red brick particles are particles obtained by crushing the waste red bricks of the building into particles with the particle size of less than or equal to 3 mm; the stabilizer is HPMC cellulose; the thickening agent is starch ether; the binder is latex powder; the defoamer is a defoamer special for concrete, and the water reducer is a polycarboxylic acid water reducer; the fiber is polyethylene fiber.

Example 7

200 parts of cement, 300 parts of regenerated red brick powder, 1000 parts of regenerated red brick particles, 0.2 part of a stabilizer, 0.1 part of a thickening agent, 0.1 part of a binder, 0.1 part of a defoaming agent, 1 part of fiber and 0.2 part of a water reducing agent.

Wherein the cement is cement ash; the regenerated red brick powder is powder with the particle size of less than or equal to 75 mu m which is obtained by crushing the building waste red bricks and then ball-milling the crushed red bricks; the regenerated red brick particles are particles obtained by crushing the building waste red bricks into particles with the particle size of less than or equal to 3 mm; the stabilizer is lignocellulose; the thickening agent is starch ether; the binder is latex powder; the defoamer is a defoamer special for concrete, and the water reducer is a polycarboxylic acid water reducer; the fibers are polypropylene fibers.

Example 8

250 parts of cement, 550 parts of regenerated red brick powder, 1000 parts of regenerated red brick particles, 0.8 part of stabilizer, 0.2 part of thickener, 0.5 part of binder, 0.3 part of defoamer, 2.5 parts of fiber and 0.8 part of water reducer.

Wherein the cement is grey cement; the regenerated red brick powder is powder with the particle size of less than or equal to 75 mu m which is obtained by crushing the building waste red bricks and then ball-milling the crushed red bricks; the regenerated red brick particles are particles obtained by crushing the building waste red bricks into particles with the particle size of less than or equal to 3 mm; the stabilizer is CMC cellulose; the thickening agent is starch ether; the binder is polyvinyl alcohol; the defoamer is a defoamer special for concrete, and the water reducer is a polycarboxylic acid water reducer; the fiber is alkali-resistant chopped glass fiber.

Example 9

200 parts of cement, 500 parts of regenerated red brick powder, 50 parts of mineral powder, 50 parts of fly ash, 1000 parts of regenerated red brick particles, 0.8 part of stabilizing agent, 0.2 part of thickening agent, 0.5 part of binding agent, 0.3 part of defoaming agent, 2.5 parts of fiber and 0.8 part of water reducing agent.

Wherein the cement is grey cement; the regenerated red brick powder is powder with the particle size of less than or equal to 75 mu m which is obtained by crushing the building waste red bricks and then ball-milling the crushed red bricks; the regenerated red brick particles are particles obtained by crushing the building waste red bricks into particles with the particle size of less than or equal to 5 mm; the stabilizer is HPMC cellulose; the thickening agent is starch ether; the binder is latex powder; the defoamer is a defoamer special for concrete, and the water reducer is a polycarboxylic acid water reducer; the fiber is alkali-resistant chopped glass fiber.

Comparative example 1

Compared with the example 1, the 3D printing material for the common building omits the recycled red brick powder in the comparative example 1, and the rest is the same as the example 1.

Comparative example 2

Compared with the example 1, the comparative example 2 replaces the recycled red brick particles with the common dry sand, and the rest is the same as the example 1.

Comparative example 3

Compared with the 3D printing material of the example 1, the 3D printing material of the common building omits the recycled red brick powder and the recycled red brick particles in the comparative example 2, and adds 640 parts by weight of cement and 1000 parts by weight of natural fine sand, and the rest is the same as the example 1.

Comparative example 4

Compared with the example 1, the weight part of the recycled red brick powder added in the comparative example 3 is 150 parts, and the rest is the same as the example 1.

Comparative example 5

Compared with the example 1, the weight part of the recycled red brick particles added in the comparative example 4 is 650 parts, and the rest is the same as the example 1.

Performance testing

The architectural 3D printing materials of the examples and comparative examples were mixed with water to form a mortar for architectural 3D printing, and performance tests were performed. Wherein the weight addition amount of the water is 15% of the building 3D printing material.

Sampling and respectively testing each mortar for 3D printing of the building, wherein the compressive strength of the mortar for 3D printing of the building is carried out according to the national standard of cement mortar strength test (GB/T17071-1999), and the detection method of the slump comprises the following steps: the fluidity of the 3D printing material is measured by using a cement fluidity electric jump table, 15 times of vibration are used as a basic test basis, and the slump is 140-170 mm. The corresponding test results are shown in table 1 below.

Table 1 test results of 3D printed materials of each example and comparative example

Numbering	Compressive strength (MPa)	Slump (mm)
			Example 1	33.6	145
Example 2	38.5	140
			Example 3	20.8	170
Example 4	25.5	162
			Example 5	28.5	158
Example 6	25.6	160
			Example 7	32.2	146
Example 8	28.6	157
			Example 9	25.2	164
Comparative example 1	18.7	182
			Comparative example 2	29.8	175
Comparative example 3	28.6	178
			Comparative example 4	19.5	180
Comparative example 5	15.6	185

From the above, the building 3D printing material provided by the invention is prepared by mixing the regenerated red brick particles and the regenerated red brick powder into the building 3D printing material and adding other additives for regulation, so that the material not only meets the requirements of pumpability, extrudability and constructability of the building 3D printing ink, but also has higher strength and meets the requirements of slump and strength of 3D printing.

In conclusion, due to the use of the regenerated red brick particles and the regenerated red brick powder, on one hand, a new way is provided for recycling red bricks which are waste for building demolition, the utilization rate of waste red bricks is greatly improved, on the other hand, the utilization rate of clay is greatly reduced, the utilization rate of energy is reduced, the emission of carbon is reduced, natural resources are saved, and the production cost is reduced.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. The building 3D printing material is characterized by comprising the following components in parts by weight:

2. The architectural 3D printing material according to claim 1, comprising the following components in parts by weight: 220-410 parts of cement, 410-600 parts of regenerated red brick powder, 1000-1230 parts of regenerated red brick particles, 0.2-1 part of stabilizer, 0.2-1 part of binder, 0.1-1 part of defoamer, 0.5-3.5 parts of fiber and 0.1-4 parts of water reducer;

preferably, the composition comprises the following components in parts by weight: 250-350 parts of cement, 450-550 parts of regenerated red brick powder, 1000-1200 parts of regenerated red brick particles, 0.5-1 part of stabilizer, 0.3-0.8 part of binder, 0.2-0.7 part of defoamer, 1-2.5 parts of fiber and 0.3-3 parts of water reducer.

3. The architectural 3D printing material of claim 1, wherein the recycled red brick powder is micron-sized or nano-sized, and/or the recycled red brick particles are millimeter-sized;

preferably, the particle size range of the regenerated red brick powder is less than or equal to 100 mu m, and more preferably less than or equal to 75 mu m;

preferably, the particle size range of the regenerated red brick particles is less than or equal to 5mm, and more preferably less than or equal to 3 mm.

4. The architectural 3D printing material of claim 1, wherein the preparation method of the recycled red brick powder comprises: crushing the waste red bricks of the building, and then ball-milling the crushed red bricks into powder with the particle size of less than or equal to 100 mu m to obtain regenerated red brick powder;

preferably, the preparation method of the recycled red brick particles comprises the following steps: crushing the waste red bricks into particles with the particle size of less than or equal to 5mm to obtain the regenerated red brick particles.

5. The architectural 3D printed material of claim 1, further comprising an active material comprising at least one of silica fume, fly ash, or mineral fines;

preferably, the weight parts of the silica fume are 0-150 parts, the weight parts of the fly ash are 0-200 parts, and the weight parts of the mineral powder are 0-300 parts.

6. The architectural 3D printed material of claim 1, further comprising a thickener comprising a starch ether;

preferably, the weight part of the thickening agent is 0.1-1 part.

7. The architectural 3D printing material of any of claims 1-6, wherein the cement comprises at least one of portland cement, slag cement, sulphoaluminate cement, or aluminate-modified portland cement;

preferably, the cement is white cement and/or grey cement, preferably grey cement;

preferably, the stabilizer comprises at least one of diatomaceous earth, methyl hydroxyethyl cellulose ether, methyl cellulose, methyl hydroxypropyl cellulose ether, lignocellulose, CMC cellulose or HPMC cellulose, preferably HPMC cellulose;

preferably, the binder comprises at least one of latex powder, resin or polyvinyl alcohol, preferably latex powder;

preferably, the fibers comprise at least one of polypropylene fibers, polyethylene fibers, alkali-resistant glass fibers, alkali-resistant chopped glass fibers or basalt fibers, and preferably alkali-resistant chopped glass fibers.

8. A preparation method of a building 3D printing material, wherein the building 3D printing material is the building 3D printing material as claimed in any one of claims 1 to 7, and the preparation method comprises the following steps:

mixing and stirring cement, regenerated red brick powder, regenerated red brick particles, a stabilizer, a binder, a defoaming agent, fibers and a water reducing agent uniformly to obtain a building 3D printing material;

preferably, mixing and stirring cement, regenerated red brick powder, regenerated red brick particles, a stabilizer, a binder, a defoaming agent, fibers, a water reducing agent, a thickening agent and an optional active material uniformly to obtain a building 3D printing material;

preferably, the stirring time is 5-90 min, and/or the stirring temperature is 20-50 ℃.

9. Use of the architectural 3D printed material of any one of claims 1-7 or the method of claim 8 in the field of 3D printed buildings.

10. 3D products printed by the architectural 3D printing material of any one of claims 1 to 7 or the architectural 3D printing material prepared by the method of claim 8.