A novel two-component early-strength high-strength 3D printing building material and a method of using the same

Abstract

The application discloses a novel two-component early-strength high-strength 3D printing building material and a use method thereof, and comprises component A and component B, and the mass ratio of the component A and the component B is 1.0-1.3:1; wherein the component A comprises the following components in percentage by mass: fast-hardening cement clinker 200-500 parts, A filler 0-200 parts, aggregate 300-600 parts, A functional additive 8-15 parts, and water 140-200 parts; the component B comprises the following components in percentage by mass: gypsum 120-400 parts, lime 15-80 parts, B filler 0-200 parts, aggregate 300-600 parts, B functional additive 5-15 parts, and water 140-220 parts. The two components are mixed together, the overall mass of the component A and the component B is matched, the balance of hardness and setting is realized, the two components are matched with each other, the adaptability to the cementitious system is ensured, the comprehensive performance of the material is improved, the material has excellent early-strength high-strength performance, crack resistance and durability, is suitable for 3D printing construction of various building components, and has a wide application range.

Description

Technical Field

[0001] This invention relates to the field of 3D printed building materials, specifically to a novel two-component early-strength and high-strength 3D printed building material and its application method. Background Technology

[0002] With the continuous development of the construction industry, 3D printing technology is rapidly penetrating and changing traditional construction methods. The application of 3D printing technology in the construction industry not only improves the efficiency of construction production but also prompts higher requirements for the performance of printing materials. Specifically, these materials need to possess early-strength characteristics such as rapid setting and hardening to ensure that they can quickly reach a certain strength during the printing process, thereby guaranteeing the stability and safety of the structure.

[0003] Comparing this to Chinese patent CN107162451B, which discloses a high water-resistant magnesium phosphate cement that does not require a retarder, it is made from four raw materials: sintered magnesium oxide, dihydrogen phosphate, water, and silica fume. By weight, the composition is 50-70 parts sintered magnesium oxide, 10-40 parts dihydrogen phosphate, and 10-20 parts silica fume. The amount of water added is 0.14-0.18 times the sum of the weights of sintered magnesium oxide, silica fume, and dihydrogen phosphate, minus the amount of water of crystallization released by the dihydrogen phosphate dissolving in water. The dihydrogen phosphate is one or a mixture of two of K2HPO4·3H2O and disodium hydrogen phosphate. The above-mentioned cement uses magnesium powder, dihydrogen phosphate, and silica fume as core components. No additional retarder is needed, and the setting time is controlled to be above 30 minutes. The water resistance is improved by optimizing the silica fume content. However, due to its fast overall setting speed and high rheological properties, its yield value is too low and it is prone to sagging. The interlayer bond strength is less than 1.8 MPa. When 3D printing, it is easy to encounter the situation of not being able to stack, which cannot meet the requirements for stacking stability of the printed structure.

[0004] Comparing this to Chinese patent CN113816635B, which discloses a fast-hardening, early-strength, high-water-resistant magnesium phosphate-alkali-activated mixed cementitious material, the amounts of each raw material used by weight are: 3852 parts of calcined magnesium oxide, 820 parts of alkaline hydrogen phosphate, 620 parts of silica fume, 820 parts of water, 628 parts of activatable minerals, and 0.2-9 parts of water-storing material. This mixed cementitious material uses the product of high-alkalinity magnesium phosphate cementitious material prepared by alkaline hydrogen phosphate and reacted with water as an activating substance to alkali-activate the activatable minerals, thereby forming a structure in which magnesium phosphate cementitious material and alkali-activated cementitious material are interwoven. However, its overall rheological properties are mainly controlled through a single-component structure, which makes it difficult to control, prone to clogging during printing, and has low overall strength, making it difficult to meet the different needs of architectural printing.

[0005] Therefore, there is a need for a novel two-component early-strength high-strength 3D printing building material and its application method, which have higher interlayer bonding strength, easier control of viscosity and setting time, and higher compressive strength, in order to solve the above problems. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a novel two-component early-strength and high-strength 3D printing building material and its application method, so as to solve the problems of low interlayer bonding strength, difficulty in controlling viscosity and setting time, low compressive strength and limited applicability in the prior art.

[0007] The objective of this invention is achieved as follows: This invention provides a novel two-component early-strength, high-strength 3D printing building material, comprising component A and component B, wherein the mass ratio of component A to component B is 1.0-1.3:1; Component A, by mass fraction, includes the following components: 200-500 parts of rapid-hardening cement clinker, 0-200 parts of filler A, 300-600 parts of aggregate, 8-15 parts of functional admixture A, and 140-200 parts of water; Component B, by mass fraction, includes the following components: 120-400 parts gypsum, 15-80 parts lime, 0-200 parts filler B, 300-600 parts aggregate, 5-15 parts functional admixture B, and 140-220 parts water.

[0008] In some embodiments, the functional admixture A, by mass fraction, includes 0.1-1 parts of thickening and water-retaining agent, 2-5 parts of retarder, 0.1-2 parts of water-reducing agent, 0.1-1 parts of thixotropic lubricant, 0.1-1 parts of anti-sagging agent, 2-5 parts of early strength agent, 2-5 parts of waterproofing agent, and 0.1-2 parts of crack-resistant fiber; In some embodiments, the functional additive B includes 0-1.3% retarder, 0.05-0.15% defoamer, 0.2-1% thickener and water-retaining agent, 0.3-2% water-reducing agent, 0.2-1% thixotropic lubricant, 0.2-1% anti-sagging agent, 2-4% early strength agent, 2-5% waterproofing agent, and 0.3-2% crack-resistant fiber.

[0009] In some embodiments, the rapid-hardening cement clinker is one or more of rapid-hardening sulfoaluminate cement clinker, rapid-hardening ferroaluminate cement clinker, and high-alumina cement clinker.

[0010] In some embodiments, filler A is one or more of heavy calcium carbonate powder, stone powder, mineral powder, fly ash, and silica fume; filler B is one or more of heavy calcium carbonate powder, stone powder, fly ash, silica fume, and metakaolin.

[0011] In some embodiments, the A filler is a combination of mineral powder and silica fume, a combination of fly ash and mineral powder, or a combination of heavy calcium carbonate powder and stone powder; The B filler is a combination of metakaolin, silica fume and heavy calcium carbonate powder, fly ash and heavy calcium carbonate powder, or stone powder and heavy calcium carbonate powder.

[0012] In some embodiments, the functional admixture A and the water-reducing agent in B are one or more of polycarboxylate water-reducing agents or lignin water-reducing agents.

[0013] In some embodiments, the retarder in the functional admixture B is citric acid, tartaric acid, or a gypsum-specific polyphosphate retarder; The defoamer in the functional additive B is a silicone defoamer or a polyether defoamer, and the effective ingredient of the silicone defoamer is ≥10%.

[0014] A method for using a novel two-component early-strength, high-strength 3D-printed building material includes the following steps: S1, Raw material mixing Mixing of Component A: Add the rapid-hardening cement clinker, filler A, and aggregate to the mixing tank in sequence, and stir at 80-100 r / min for 3-5 minutes. Add the powder from functional admixture A and continue stirring for 2 minutes. Then, add 80% of the water mass of component A to the liquid material of functional admixture A for dilution. Add the diluted liquid material to the mixing tank in 2-3 batches and stir for 3-4 minutes. Add the remaining 10%-20% of the water mass according to the required slurry consistency until the slurry viscosity stabilizes at 800-1200 mPa·s. Mixing of Component B: Add gypsum, lime, filler B, and aggregate to another mixing tank in sequence, and stir at 80-100 r / min for 3-5 minutes. Dilute the liquid material in the functional admixture B with 75% of the water mass of component B. Pour the diluted functional admixture mixture into the mixing tank and stir for 2-6 minutes. Add the remaining 10%-25% of water mass according to the required slurry consistency until the slurry viscosity stabilizes at 700-1000 mPa·s. S2, Two-component synergistic mixing Pour the well-stirred A component slurry into the mixing tank and stir at a speed of 60-80 r / min. According to the preset ratio, pour the A component slurry and the B component slurry into the mixing tank and continue stirring for 2-3 minutes. Control the viscosity of the mixed slurry to be 900-1300 mPa·s and the setting time to be 30-60 minutes. S3, 3D printing construction The properly mixed slurry is fed into the 3D printer via a delivery pump and printed at a speed of 30-50 mm / s and a layer thickness of 2-5 cm. The interval between adjacent printed layers is controlled at 10-20 minutes. S4, Post-treatment maintenance After printing, let it stand for 24 hours, then spray water for curing for 7 consecutive days, spraying the wall with water every 6 hours.

[0015] Preferably, in a novel two-component early-strength and high-strength 3D printing building material, when mixing component B in S1, after adding all the water by mass to the mixing tank, an antifoaming agent is added and the mixture is stirred for 2-10 minutes.

[0016] Positive and beneficial effects: (1) The two-component synergistic mixing is adopted. Component A is based on fast-hardening cement clinker to improve early strength and high strength performance, while component B is based on gypsum and lime to adjust setting time and strength. When the mass ratio of component A to component B is large, higher viscosity and faster setting time can be obtained. By matching the overall mass of component A and component B, a balance between hardness and setting can be achieved. By adjusting the overall mass ratio of component A and component B, the material can be adapted to different scenarios for use. (2) Component A is specifically added with a retarder to adapt to the rapid setting characteristics of fast-hardening cement; (3) The 3D printed building material prepared by the present invention has an overall 1d compressive strength ≥30MPa, a 28d compressive strength ≥50MPa, and an interlayer bond strength ≥2.5MPa. It has excellent early strength and high strength performance, crack resistance and durability, and is suitable for 3D printing construction of various building components. It has a wide range of applications. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments.

[0018] First embodiment: This invention provides a novel two-component early-strength, high-strength 3D printing building material, wherein component A, by mass fraction: 450 parts of rapid-hardening sulfoaluminate cement clinker, A filler (120 parts mineral powder + 55 parts silica fume), 400 parts of aggregate, 12 parts of A functional admixture (0.5 parts thickening and water-retaining agent, 3 parts retarder, 1 part polycarboxylate superplasticizer, 0.5 parts thixotropic lubricant, 0.5 parts anti-sagging agent, 3 parts aluminum sulfate early strength agent, 3 parts organosilicon waterproofing agent, 0.5 parts polypropylene fiber), and 170 parts of water.

[0019] Component B, by mass fraction: 270 parts gypsum, 35 parts lime, B filler (70 parts metakaolin + 20 parts silica fume + 50 parts heavy calcium carbonate powder), 380 parts aggregate, 10 parts B functional admixtures (0.5 parts thickening and water-retaining agent, 1 part polycarboxylate superplasticizer, 0.5 parts thixotropic lubricant, 0.5 parts anti-sagging agent, 3 parts aluminum sulfate early strength agent, 3 parts silicone waterproofing agent, 0.8 parts polypropylene fiber, 1.5 parts citric acid retarder, 0.12 parts silicone defoamer), and 180 parts water.

[0020] The method of using the above-mentioned novel two-component early-strength high-strength 3D printing building material involves the following steps: S1. Raw material mixing: Add the rapid-hardening cement clinker, filler A, and aggregate from component A to the mixing tank and dry mix at 80-100 r / min for 3-5 minutes. Add the powdered admixture from functional admixture A to the mixing tank and mix for 2 minutes. Add 80% water to the liquid admixture from functional admixture A for preliminary mixing, and then add it to the dry-mixed material in 3 portions. After each addition of water to the mixing tank, mix for 3 minutes before adding the second portion of liquid. After all the diluted liquid admixture has been added to the mixing tank, add the remaining water as needed and adjust the viscosity to 1000 mPa·s. The gypsum, lime, filler B, and aggregate in component B are added sequentially to another mixing tank and stirred at 80-100 r / min for 3-5 minutes. The liquid material in functional admixture B is diluted with 75% of the water mass in component B. The diluted functional admixture mixture is then sent to the mixing tank and stirred for 4 minutes. The defoamer is diluted separately with 5% of the remaining water. The diluted defoamer is added to the mixing tank, and the remaining water is added according to the consistency of the slurry to adjust the overall viscosity to 800 mPa·s.

[0021] S2. Two-component synergistic mixing: Add components A and B at a mass ratio of 1.1:1, stir at 60 r / min for 2.5 minutes, and obtain sample 1.

[0022] S3 3D printing operation: ambient temperature 25℃, humidity 60%, nozzle diameter 30mm, printing speed 40mm / s, layer thickness 3mm, interlayer interval 8 minutes.

[0023] S4. Post-maintenance: After standing for 24 hours, spray water 4 times a day for 7 days.

[0024] Performance testing: The sample viscosity in S2 was 1100 Pa·s, and the solidification time was approximately 10-30 minutes.

[0025] Because the rapid-hardening cement clinker (sulfoaluminate cement) of component A undergoes a hydration reaction with gypsum and lime of component B after mixing, products such as hydrated calcium aluminate and hydrated calcium sulfoaluminate are generated, which forms a preliminary network structure inside the slurry, resulting in an increase in viscosity. In particular, the cement clinker of component A itself has rapid hardening characteristics, and the rapid hydration after mixing will enhance the cohesiveness of the slurry, pushing the viscosity up from "average viscosity of the two components 900 mPa·s" to 1100 mPa·s.

[0026] The thickening and water-retaining agent in component A works synergistically with the thickening and water-retaining agent and thixotropic lubricant (modified bentonite) in component B to form a double-bonded network in the slurry, significantly increasing the yield value and thus increasing the viscosity. The anti-sagging agent (fumed silica) in component B is superimposed on the anti-sagging agent in component A, which enhances the stability of the slurry structure through particle adsorption and further increases the viscosity.

[0027] It has a 1-day compressive strength of 32 MPa, a 7-day compressive strength of 42 MPa, a 28-day compressive strength of 53 MPa, an interlaminar bond strength of 2.8 MPa, and high overall compressive strength, making it suitable for use in the processing of load-bearing components.

[0028] Comparative Example 1: The difference from the first embodiment is that a single-component system is used (only component A of the first embodiment is retained, and component B is removed), while the other raw materials and usage methods remain unchanged.

[0029] Performance testing: 1-day compressive strength 26MPa, 28-day compressive strength 42MPa. The printing speed slowed down when the printing operation window was longer than 120 minutes, affecting printing efficiency. Moreover, obvious shrinkage cracks appeared on the surface of the printed component after about 17 hours.

[0030] Comparative Example 2: The difference from the first embodiment is that the aggregate mass of component B is reduced to 300 parts by mass, and no defoamer is added, while the other raw materials and usage methods remain unchanged.

[0031] Performance testing: 1-day compressive strength 28MPa, 28-day compressive strength 46MPa, many large air bubbles were present in the slurry, the density of the printed component was insufficient, and the interlayer bond strength was 1.8MPa.

[0032] Comparative Example 3: The difference from the first embodiment is that fillers A and B are both single heavy calcium carbonate powder, while the other raw materials and usage methods remain unchanged.

[0033] Performance testing: 1-day compressive strength 25MPa, 28-day compressive strength 40MPa, poor workability of the slurry, prone to dripping during printing.

[0034] By comparing the components and properties of the first embodiment with those of Comparative Examples 1, 2, and 3, it can be seen that the two-component system, differentiated admixture configuration, and composite filler combination of the present invention can significantly improve the early strength and high strength performance, construction adaptability, and durability of 3D printed building materials, and solve many defects of the prior art.

[0035] Second embodiment: A novel two-component early-strength and high-strength 3D printing building material, wherein the mass ratio of component A to component B is 1.0:1; Component A, by mass fraction: 400 parts of rapid-hardening aluminoferrite cement clinker, A filler (80 parts fly ash + 40 parts mineral powder), 380 parts aggregate, 10 parts of A functional admixture (0.4 parts thickening and water-retaining agent, 2.5 parts retarder, 0.8 parts polycarboxylate superplasticizer, 0.4 parts thixotropic lubricant, 0.4 parts anti-sagging agent, 2.5 parts lithium carbonate early-strength agent, 2.5 parts calcium stearate waterproofing agent, 0.5 parts alkali-resistant glass fiber), and 160 parts water.

[0036] Component B, by mass fraction: 220 parts gypsum, 30 parts lime, B filler (60 parts fly ash + 60 parts heavy calcium carbonate powder), 350 parts aggregate, 8 parts B functional admixtures (0.4 parts thickening and water-retaining agent, 0.8 parts polycarboxylate superplasticizer, 0.4 parts thixotropic lubricant, 0.4 parts anti-sagging agent, 2 parts lithium carbonate early strength agent, 2 parts calcium stearate waterproofing agent, 0.6 parts alkali-resistant glass fiber, 1.2 parts gypsum-specific retarder, 0.1 parts polyether defoamer), and 170 parts water.

[0037] The usage method is the same as in the first embodiment.

[0038] Performance testing: In the second embodiment, the viscosity of the sample in S2 was 1000 Pa·s, and the solidification time was approximately 30-50 minutes.

[0039] The compressive strength at 1 day is 31 MPa, the compressive strength at 7 days is 38 MPa, the compressive strength at 28 days is 49 MPa, and the interlaminar bond strength is 2.6 MPa. Overall, it meets the volume stability requirements of large-volume components.

[0040] Third embodiment: A novel two-component early-strength and high-strength 3D printing building material, wherein the mass ratio of component A to component B is 1.2:1.

[0041] Component A, by mass fraction: 500 parts high-alumina cement clinker, A filler (60 parts heavy calcium carbonate powder + 50 parts stone powder), 450 parts aggregate, 13 parts A functional admixture (0.6 parts thickening and water-retaining agent, 3.5 parts retarder, 1.2 parts lignin water-reducing agent, 0.6 parts thixotropic lubricant, 0.6 parts anti-sagging agent, 3.5 parts aluminum sulfate early strength agent, 3 parts organosilicon waterproofing agent, 0.6 parts polypropylene fiber), and 180 parts water.

[0042] Component B, by mass fraction: 300 parts gypsum, 40 parts lime, B filler (50 parts stone powder + 50 parts heavy calcium carbonate powder), 420 parts aggregate, 12 parts B functional admixtures (0.6 parts thickening and water-retaining agent, 1.2 parts lignin water-reducing agent, 0.6 parts thixotropic lubricant, 0.6 parts anti-sagging agent, 3 parts aluminum sulfate early strength agent, 3 parts organosilicon waterproofing agent, 1 part polypropylene fiber, 2 parts tartaric acid retarder, 0.16 parts organosilicon defoamer), and 190 parts water.

[0043] The usage method is the same as in the first embodiment.

[0044] Performance testing: The viscosity after mixing is 11500 mPa·s, and the setting time is 38-46 minutes. The 1-day compressive strength is 32 MPa, the 7-day compressive strength is 47 MPa, the 28-day compressive strength is 57 MPa, the interlayer bond strength is 2.9 MPa, the molded surface is smooth, and it meets the requirements for non-load-bearing and decorative purposes. The overall cost is reduced by about 15% compared with the first embodiment. This component is not suitable for non-load-bearing partitions in ordinary ground-floor residential buildings, but is more suitable for use in walls in areas with high humidity and for load-bearing frames.

[0045] Fourth embodiment: A novel two-component early-strength and high-strength 3D printing building material, wherein the mass ratio of component A to component B is 1.0:1.

[0046] Component A, by mass fraction: 350 parts rapid-hardening sulfoaluminate cement clinker, A filler (60 parts heavy calcium carbonate powder + 40 parts stone powder), 350 parts aggregate, A functional admixture 9 parts (0.3 parts thickening and water-retaining agent, 2 parts retarder, 0.7 parts lignin water-reducing agent, 0.3 parts thixotropic lubricant, 0.3 parts anti-sagging agent, 2 parts aluminum sulfate early-strength agent, 2 parts calcium stearate waterproofing agent, 0.4 parts polypropylene fiber), and 150 parts water.

[0047] Component B, by mass fraction: 200 parts gypsum, 25 parts lime, B filler (50 parts stone powder + 50 parts heavy calcium carbonate powder), 320 parts aggregate, 7 parts B functional admixtures (0.3 parts thickening and water-retaining agent, 0.7 parts lignin water-reducing agent, 0.3 parts thixotropic lubricant, 0.3 parts anti-sagging agent, 2 parts aluminum sulfate early strength agent, 2 parts calcium stearate waterproofing agent, 0.5 parts polypropylene fiber, 1 part tartaric acid retarder, 0.1 part organosilicon defoamer), and 160 parts water.

[0048] The usage method is the same as in the first embodiment.

[0049] Performance testing: The viscosity after mixing is 950 mPa·s, and the setting time is 63-78 minutes. The compressive strength is 27 MPa at 1 day, 39 MPa at 7 days, and 48 MPa at 28 days. The interlayer bond strength is 2.1 MPa. The molded surface is smooth, meeting the requirements for non-load-bearing and decorative applications. The overall cost is reduced by about 15% compared to the first embodiment, making it suitable for the construction of decorative non-load-bearing building walls.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel two-component early-strength, high-strength 3D printing building material, characterized in that: It includes component A and component B, wherein the mass ratio of component A to component B is 1.0-1.3:1; Component A, by mass fraction, includes the following components: 200-500 parts of rapid-hardening cement clinker, 0-200 parts of filler A, 300-600 parts of aggregate, 8-15 parts of functional admixture A, and 140-200 parts of water; Component B, by mass fraction, includes the following components: 120-400 parts gypsum, 15-80 parts lime, 0-200 parts filler B, 300-600 parts aggregate, 5-15 parts functional admixture B, and 140-220 parts water.

2. The novel two-component early-strength high-strength 3D printing building material according to claim 1, characterized in that: The functional additive A, by mass fraction, includes 0.1-1 parts thickening and water-retaining agent, 2-5 parts retarder, 0.1-2 parts water-reducing agent, 0.1-1 parts thixotropic lubricant, 0.1-1 parts anti-sagging agent, 2-5 parts early strength agent, 2-5 parts waterproofing agent, and 0.1-2 parts crack-resistant fiber.

3. The novel two-component early-strength high-strength 3D printing building material according to claim 3, characterized in that: The functional additives B include 0-1.3% retarder, 0.05-0.15% defoamer, 0.2-1% thickener and water-retaining agent, 0.3-2% water-reducing agent, 0.2-1% thixotropic lubricant, 0.2-1% anti-sagging agent, 2-4% early strength agent, 2-5% waterproofing agent, and 0.3-2% crack-resistant fiber.

4. The novel two-component early-strength high-strength 3D printing building material according to claim 1, characterized in that: The rapid-hardening cement clinker is one or more of the following: rapid-hardening sulfoaluminate cement clinker, rapid-hardening ferroaluminate cement clinker, and high-alumina cement clinker.

5. A novel two-component early-strength, high-strength 3D printing building material according to claim 4, characterized in that: The filler A is one or more of heavy calcium carbonate powder, stone powder, mineral powder, fly ash, and silica fume; the filler B is one or more of heavy calcium carbonate powder, stone powder, fly ash, silica fume, and metakaolin.

6. A novel two-component early-strength, high-strength 3D printing building material according to claim 5, characterized in that: The A filler is a combination of mineral powder and silica fume, fly ash and mineral powder, or heavy calcium carbonate powder and stone powder. The B filler is a combination of metakaolin, silica fume and heavy calcium carbonate powder, fly ash and heavy calcium carbonate powder, or stone powder and heavy calcium carbonate powder.

7. A novel two-component early-strength, high-strength 3D printing building material according to claim 1, characterized in that: The functional additive A and the water-reducing agent in B are one or more of polycarboxylate water-reducing agents or lignin water-reducing agents.

8. A novel two-component early-strength, high-strength 3D printing building material according to claim 1, characterized in that: The retarder in the functional admixture B is citric acid, tartaric acid, or a gypsum-specific polyphosphate retarder; The defoamer in the functional additive B is a silicone defoamer or a polyether defoamer, and the effective ingredient of the silicone defoamer is ≥10%.

9. The method of using the two-component early-strength high-strength 3D printing building material according to any one of claims 1-8, characterized in that, Includes the following steps: S1, Raw material mixing Mixing of Component A: Add the rapid-hardening cement clinker, filler A, and aggregate to the mixing tank in sequence, and stir at 80-100 r / min for 3-5 minutes. Add the powder from functional admixture A and continue stirring for 2 minutes. Then, add 80% of the water mass of component A to the liquid material of functional admixture A for dilution. Add the diluted liquid material to the mixing tank in 2-3 batches and stir for 3-4 minutes. Add the remaining 10%-20% of the water mass according to the required slurry consistency until the slurry viscosity stabilizes at 800-1200 mPa·s. Mixing of Component B: Add gypsum, lime, filler B, and aggregate to another mixing tank in sequence, and stir at 80-100 r / min for 3-5 minutes. Dilute the liquid material in the functional admixture B with 75% of the water mass of component B. Pour the diluted functional admixture mixture into the mixing tank and stir for 2-6 minutes. Add the remaining 10%-25% of water mass according to the required slurry consistency until the slurry viscosity stabilizes at 700-1000 mPa·s. S2, Two-component synergistic mixing Pour the well-stirred A component slurry into the mixing tank and stir at a speed of 60-80 r / min. According to the preset ratio, pour the A component slurry and the B component slurry into the mixing tank and continue stirring for 2-3 minutes. Control the viscosity of the mixed slurry to be 900-1300 mPa·s and the setting time to be 30-60 minutes. S3, 3D printing construction The properly mixed slurry is fed into the 3D printer via a delivery pump and printed at a speed of 30-50 mm / s and a layer thickness of 2-5 cm. The interval between adjacent printed layers is controlled at 5-15 minutes. S4, Post-treatment maintenance After printing, let it stand for 24 hours, then spray water for curing for 7 consecutive days, spraying the wall with water every 6 hours.

10. The method of using a novel two-component early-strength high-strength 3D printing building material according to claim 9, characterized in that, When mixing component B in S1, after adding all the water by mass to the mixing tank, add the defoamer and stir for 2-10 minutes.