CN104961411A - High-performance powder concrete for 3D (three-dimensional) printing - Google Patents
High-performance powder concrete for 3D (three-dimensional) printing Download PDFInfo
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Abstract
The invention relates to high-performance powder concrete for 3D (three-dimensional) printing. The concrete is prepared from the following raw materials in parts by weight: 500-900 parts of ordinary Portland cement, 250-350 parts of active mineral admixture, 800-1,300 parts of inert filler, 10-20 parts of composite efficient water reducing agent powder, 2-5 parts of thickener, 4-10 parts of self-curing agent, 2-10 parts of fast setting time regulator, 145-230 parts of water, 3 parts of organic fiber and 40-200 parts of copper plated fiber. The concrete material for 3D printing has the characteristics of ultrahigh strength and toughness, good durability, long full life cycle, high curing rate, good flowing property and easiness in pumping and lifting and is suitable for constructing 3D-printed building structural materials in all kinds of engineering.
Description
Technical field
The present invention relates to technical field of concrete, particularly a kind of in construction work for 3D print high-performance powder concrete.
Background technology
In fact, 3D printing technique is that the mode utilizing photocuring and ply of paper to fold realizes the shaping technology of rapid coagulation.3D printer built with powdery resin, metal or Plastic other compound can jointing material, after being connected with computer, by the multilayer printing type of layer upon layer, finally the blueprint on computer is become in kind.3D printing technique can be applied in building trade, after computer design draws relevant buildings pattern, realizes the axial motion of X by portalframe travel mechanism; The motion in Y direction is realized by crossbeam; Print bar by printhead top realizes the motion in Z direction.By the flexible of printhead self with rotate, realize the local motion of printing head, thus by the continuous accumulation of " plane layer " that print buildings, generate different building structure.
Wherein, " ink " that sprays at 3D printer head is the material comprising concrete, at Chinese literature " 3D prints Building technology and premixed concrete industry is looked forward to " (Li Fuping, Deng Chunlin, Wan Jingzhu, refer to " the concrete world " 03 phase in 2013) disclose in a literary composition: print the building epoch at 3D, the starting material of commerical ready-mixed concrete will become more extensive, and such as gelling material may adopt special cement, resin, magnesium gelatinous material etc.; The specification of quality of coarse-fine aggregate can be higher, to meet the needs that 3D prints, new crushing process likely can be adopted to produce and be different from present material completely; Admixture may fundamentally change, and its effect played in concrete system and the mechanism of action are also different from completely now.For meeting the needs that 3D prints, concrete must possess better rheological and can condense rapidly in atmosphere, and maximum aggregate size can become less, and granule-morphology is closer to circle; How perfectly in conjunction with problem also need to solve between each layer, this needs new additive.That is, reach desirable 3D printing effect, the concrete printing building for 3D needs to possess following four features on self property: (1) curing speed is fast; (2) Self-curing performance is good; (3) good fluidity, is easy to promote and pumping; (4) caking ability is high.Wherein, by adding autogenous curing agent in concrete, concrete can being made under the state of natural curing to be converted into stable crystallization, thus to obtain larger intensity, concrete flowing property can be improved by adding the pumping agents such as water reducer.
But, the concrete generally used in construction work does not have the character that may be used for 3D and print, if application number is that 201410262231.X is called " a kind of concrete of very-high performance " Chinese invention patent application and discloses a kind of ultra-high performance concrete, described ultra-high performance concrete comprises the material of following mass parts ratio: gelling material: 950 ~ 1000 parts, gather materials: 1057 ~ 1107 parts, water: 171 ~ 180 parts, steel fiber: 78 parts, water reducer: 14.25 ~ 15 parts, defoamer: 5.7 ~ 6 parts; Gather materials and comprise: the Machine-made Sand of particle diameter 3 ~ 5mm, the Machine-made Sand of particle diameter 1 ~ 3mm and particle diameter are the river sand of 0.21 ~ 0.42mm, to be wherein the mass ratio of the river sand of 0.21 ~ 0.42mm be for the Machine-made Sand of 3 ~ 5mm, the Machine-made Sand of particle diameter 1 ~ 3mm and particle diameter: 1: 0.6: 0.4; Gelatinous material comprises the material of following massfraction: silicate cement 50% ~ 60%, rapid hardening cement 15% ~ 25% and grinding fine cement 15% ~ 25%; The particle diameter of grinding fine cement is: 5 ~ 20 μm.Although this type of concrete has possessed good Self-curing performance on the one hand, concrete can obtain good toughness and intensity after natural curing, also good mobility has been possessed on the other hand, be applicable to pumping and lifting, but, it does not have preferably solidifying performance soon, in 3D print procedure, is difficult to the strong concrete structure forming anticipation; Caking ability is not high, and the buildings finished laminar phenomenon of printing can be caused so obvious, cannot be one-body molded, is unfavorable for the stable of this body structure of buildings.
Summary of the invention
In order to overcome the defect of prior art, the object of the present invention is to provide that a kind of curing speed is fast, Self-curing performance is good, be easy to pumping and lifting, high performance concrete that adhesive property is excellent, be applicable to 3D in construction work and print building, one-body molded by the concrete structure of printing shaping, and possess good structural strength.
Object of the present invention is achieved by the following technical programs:
A kind of high-performance powder concrete for 3D printing is made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 500 ~ 900 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 250 ~ 350 parts for 7 days;
Particle diameter is less than below 2.50mm inert filler 800 ~ 1300 parts;
10 ~ 20 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 2 ~ 5 parts;
Autogenous curing agent 4 ~ 10 parts;
Rapid coagulation Timing agent 2 ~ 10 parts;
145 ~ 230 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 40 ~ 200 parts.
In this kind of high-performance powder concrete, add the rapid coagulation Timing agent of said components, concrete coagulating time can regulate.During printing, surface thixotroping skinning setting time generally can control at 2 ~ 10 minutes, initial set generally can control within 40 minutes, final setting time controls within 60 minutes, be conducive to utilizing the folded method of ply of paper to print concrete structure, the concrete structure printed through 3D can rapid shaping, nothing demixing phenomenon significantly, reaches integral structure, makes concrete structure obtain higher intensity; Add the raw materials such as the water reducer of said components, and use median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive for 7 days, to a certain degree can improve the compactness of the concrete mobility of this high-performance powder and the shaping rear structure of condensation, be adapted in 3D print procedure, concrete can smooth from printer nozzle, spray continuously; By adding the autogenous curing agent of said components, spray shaping concrete and be rapidly converted into stable crystalline under the state of natural curing, concrete inner structure is finer and close, makes it obtain more excellent structural strength.
Wherein, the agent of described rapid coagulation Timing is alkali-free quick-coagulant, and described alkali-free quick-coagulant is mixed by the raw material of following components by weight percent: water glass 3 ~ 5 parts, sodium aluminate 6 ~ 8 parts, 15 ~ 25 parts, Tai-Ace S 150, hydroxycarboxylic acid 3 ~ 8 parts.Use alkali-free quick-coagulant can regulate the concrete curing speed of high-performance powder on the one hand, to adapt to the needs of concrete structure rapid shaping in 3D printing, on the other hand, compared to conventional alkalescence or low alkali accelerating chemicals, the 3D adding alkali-free quick-coagulant prints high-performance powder concrete structure and does not occur whiting, reduce alkaloids to separate out, reduce chemical corrosivity of knowing clearly, improve concrete structure entirety firm, attractive in appearance.
Further, described active mineral Additive by components by weight percent be 80 ~ 140 parts of silica flours, one or more in 65 ~ 125 parts of polishing brick dusts, 55 ~ 125 parts of first level flour coal ash or 50 ~ 90 parts of S95 breezes mix.Its activeconstituents significantly can improve print component intensity and structural compactness by ton, improves weather resistance and service life of structure.
Further, described autogenous curing agent is for being that one or both in 30 ~ 50 parts of zeolite powders and 2 ~ 4 parts of water-absorbing resins are made by components by weight percent, the main cup shake reducing follow-up building construction of its effect, guarantee that intensity can normal development under dehydration curing condition, provide powerful guarantee to the Later development of structure structure intensity.Described thickening material is cellulose ethers thickening material.
Preferably, to be describedly made up of the raw material of following components by weight percent for 3D printing technique high-performance powder concrete:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 700 ~ 800 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 270 ~ 320 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 900 ~ 1100 parts;
15 ~ 20 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 3 ~ 5 parts;
Autogenous curing agent 6 ~ 9 parts;
Rapid coagulation Timing agent 5 ~ 8 parts;
180 ~ 210 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 100 ~ 180 parts.
Preferably, to be describedly made up of the raw material of following components by weight percent for 3D printing technique high-performance powder concrete:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 750 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 300 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 1000 parts;
18 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 4 parts;
Autogenous curing agent 8 parts;
Rapid coagulation Timing agent 7 parts;
200 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 150 parts.
Wherein 3D printing high-performance powder concrete is prepared from by the following method:
S1, the copper plated steel fiber limited by formula, organic fibre, silicate cement and active blending material add stirrer and are stirred to and are uniformly dispersed;
S2, the inert mineral admixture adding formula restriction again in stirrer, compound diminishing pulvis, thickening material, autogenous curing agent, the agent of rapid coagulation Timing continue to be stirred to evenly;
S3, the lay-by material be stirred by step S2 carry out packing and obtain powder;
S4, the powder obtained by step S3 carry out before printing putting into stirrer according to 3D building structure printing side amount and add corresponding restriction formula rate water, rapid stirring 1 ~ 2 minute, can become building structure 3D marking ink, formally print.
Compared with prior art, beneficial effect of the present invention is as follows:
(1) the 3D printing high-performance powder concrete that relates to of technical solution of the present invention, divergence diameter is not less than 500mm, be easy to pumping and lifting, time of coagulation adjustable, during printing, surface thixotroping skinning setting time generally can control at 3 ~ 10 minutes, initial set generally can control within 40 minutes, and final setting time controls within 60 minutes, and the total material interface of print procedure is combined with integration, without demixing phenomenon, Highrise buildings or the different component such as special can be carried out print and produce by sequential production.
(2) utilize the concrete structural strength of this kind of high performance concrete printing shaping excellent, good endurance, antidetonation, shock resistance is good, its 2 hours structural strengths are not less than 20 MPas, within 1 day, intensity is not less than 50 MPas, within 3 days, intensity is not less than 70 MPas, folding strength is not less than 10 MPas, bullet mould is not less than 35GP 28 days intensity and is not less than 110 MPas, folding strength is not less than 14 MPas, play mould and be not less than 42GP, printed material adopts and is processed as powder packaging, the site operation stirring that directly adds water got final product pumping after 2 ~ 3 minutes, engineering time is short, fast, be applicable to site operation to print or quick Fabrication concrete precast element.
(3) this high-performance concrete material comprehensive cost cost is low, and material source is extensive, large dosage industrial waste, because intensity is high, good endurance, therefore can significantly alleviate structure design weight, save material of construction and energy consumption, can be and realize industrial production building intelligent fast and support.
Embodiment
Below in conjunction with specific embodiment the present invention made and elaborating further, but embodiment does not limit in any form the present invention.
embodiment 1
A kind of high-performance powder concrete for 3D printing is made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 500 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 250 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 800 parts;
10 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 2 parts;
Autogenous curing agent 4 parts;
Alkali-free rapid coagulation Timing agent 2 parts;
145 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 40 parts.
Wherein, described alkali-free rapid time conditioning agent is mixed by the raw material of following components by weight percent: water glass 3 parts, sodium aluminate 6 parts, 15 parts, Tai-Ace S 150, hydroxycarboxylic acid 3 parts.
Described active mineral Additive by components by weight percent be 80 parts of silica flours, one or more in 65 parts of polishing brick dusts, 55 parts of first level flour coal ash or 50 parts of S95 breezes mix, described autogenous curing agent is make in 30 parts of zeolite powders and 2 parts of water-absorbing resins, and described thickening material is cellulose ethers thickening material.
The described high-performance powder concrete for 3D printing is prepared from by the following method:
S1, the copper plated steel fiber limited by formula, organic fibre, silicate cement and active blending material add stirrer and stir and be uniformly dispersed for 4 minutes;
S2, in stirrer, add the inert mineral admixture that formula limits again, compound diminishing pulvis, thickening material, autogenous curing agent, the agent of rapid coagulation Timing continue stirring 4 minutes to evenly;
S3, step S2 is stirred lay-by material, carries out packing and obtain powder;
S4, the powder obtained by step S3 carry out putting into stirrer before printing according to 3D building structure printing side amount and add corresponding restriction formula rate water, rapid stirring 2 minutes, can become building structure 3D marking ink and formally print.
embodiment 2
Except print for 3D high-performance powder concrete, the agent of alkali-free rapid coagulation Timing, active mineral Additive, autogenous curing agent formula difference except, other are with embodiment 1;
A kind of high-performance powder concrete for 3D printing is made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 900 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 350 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 1300 parts;
20 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 5 parts;
Autogenous curing agent 10 parts;
Alkali-free rapid coagulation Timing agent 10 parts;
230 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 200 parts.
Wherein, described alkali-free conditioning agent time of coagulation is mixed by the raw material of following components by weight percent: water glass 5 parts, sodium aluminate 8 parts, 25 parts, Tai-Ace S 150, hydroxycarboxylic acid 8 parts.
Described active blending material by components by weight percent be 140 parts of silica flours, one or more in 125 parts of polishing brick dusts, 125 parts of first level flour coal ash or 90 parts of S95 breezes mix.Described autogenous curing agent is made up of one or both in 50 parts of zeolite powders and 4 parts of water-absorbing resins.
embodiment 3
Except the concrete formula difference of the high-performance powder printed for 3D, other are with embodiment 1;
A kind of high-performance powder concrete for 3D printing is made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 700 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 270 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 900 parts;
15 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 3 parts;
Autogenous curing agent 6 parts;
Alkali-free rapid coagulation Timing agent 5 parts;
180 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 100 parts.
embodiment 4
Except the concrete formula difference of the high-performance powder printed for 3D, other are with embodiment 1;
A kind of high-performance powder concrete for 3D printing is made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 800 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 320 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 1100 parts;
20 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 5 parts;
Autogenous curing agent 9 parts;
Alkali-free rapid coagulation Timing agent 8 parts;
210 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 180 parts.
embodiment 5
Except the concrete formula difference of the high-performance powder printed for 3D, other are with embodiment 1;
A kind of high-performance powder concrete for 3D printing is made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 750 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 300 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 1000 parts;
18 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 4 parts;
Autogenous curing agent 8 parts;
Alkali-free rapid coagulation Timing agent 7 parts;
200 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 150 parts.
Its preparation method is with embodiment 1;
comparative example 1
Except the addition of alkali-free rapid coagulation Timing agent is 1 part, the addition of autogenous curing agent is 1 part, and the addition of water reducer pulvis is 5 parts, and active mineral Additive is 200 parts, and other conditions are with embodiment 1.
comparative example 2
Except the addition of alkali-free rapid coagulation Timing agent is 15 parts, the addition of autogenous curing agent is 15 parts, and the addition of water reducer pulvis is 25 parts, and active mineral Additive is 400 parts, and other conditions are with embodiment 2.
comparative example 3
Except adding alkaline accelerating chemicals as the agent of rapid coagulation Timing, other conditions are with embodiment 5.
Wherein, the composition of alkaline accelerating chemicals is the bauxitic clay of 35%, the soda ash of 24%, the Wingdale of 30%, the coal of 11%.
After utilizing concrete described in embodiment 1 ~ 5 and comparative example 1 ~ 3 to carry out 3D printing formation concrete structure, and carry out experiment test to its flowing property, intensity, condensation situation and delamination, experimental data is as shown in the table:
Comparative example 1,2 and embodiment 1,2 contrast, its performance perameter is all nothing like embodiment 1,2, visible, the assembly of the agent of alkali-free rapid coagulation Timing, autogenous curing agent, water reducer pulvis and active mineral Additive is on the impact of 3D printing effect, and the weight part of the agent of alkali-free rapid coagulation Timing, autogenous curing agent, water reducer pulvis and active mineral Additive is respectively 2 ~ 10 parts, 4 ~ 10 parts, 10 ~ 20 parts, 250 ~ 350 parts for optimum; Comparative example 3 is as the agent of rapid coagulation Timing using alkaline accelerating chemicals, contrast with embodiment 5, not only performance perameter can not show a candle to embodiment 3, and in test also there is whiting in comparative example 3, affect building surface color, and be not suitable for 3D printing, and visible, be suitable for as the agent of rapid coagulation Timing and select alkali-free quick-coagulant.
Claims (7)
1., for the high-performance powder concrete that 3D prints, it is characterized in that, be made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 500 ~ 900 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 250 ~ 350 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 800 ~ 1300 parts;
10 ~ 20 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 2 ~ 5 parts;
Autogenous curing agent 4 ~ 10 parts;
Rapid coagulation Timing agent 2 ~ 10 parts;
145 ~ 230 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 40 ~ 200 parts.
2. the high-performance powder concrete printed for 3D according to claim 1, it is characterized in that, the agent of described rapid coagulation Timing is alkali-free quick-coagulant; Described alkali-free quick-coagulant is mixed by the raw material of following components by weight percent: water glass 3 ~ 5 parts, sodium aluminate 6 ~ 8 parts, 15 ~ 25 parts, Tai-Ace S 150, hydroxycarboxylic acid 3 ~ 8 parts.
3. the high-performance powder concrete printed for 3D according to claim 1, it is characterized in that, described active mineral Additive by components by weight percent be 80 ~ 140 parts of silica flours, one or more in 65 ~ 125 parts of polishing brick dusts, 55 ~ 125 parts of first level flour coal ash or 50 ~ 90 parts of S95 breezes mix.
4. the high-performance powder concrete printed for 3D according to claim 1, is characterized in that, one or both in described autogenous curing agent to be components by weight percent be 30 ~ 50 parts of zeolite powders and 2 ~ 4 parts of water-absorbing resins are made; Described thickening material is cellulose ethers thickening material.
5. the high-performance powder concrete printed for 3D according to claim 1, is characterized in that, be made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 700 ~ 800 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 270 ~ 320 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 900 ~ 1100 parts;
15 ~ 20 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 3 ~ 5 parts;
Autogenous curing agent 6 ~ 9 parts;
Rapid coagulation Timing agent 5 ~ 8 parts;
180 ~ 210 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 100 ~ 180 parts.
6. the high-performance powder concrete printed for 3D according to claim 1, is characterized in that, be made up of the raw material of following components by weight percent:
Median size 20 ~ 60 μm be not less than 42.5 grade ordinary Portland cement 750 parts;
Median size 0.1 ~ 60 μm, activity index is greater than 120% active mineral Additive 300 parts for 7 days;
Particle diameter is less than below 2.5mm inert filler 1000 parts;
18 parts, the composite efficient water reducer pulvis that water-reducing rate is greater than 30%;
Thickening material 4 parts;
Autogenous curing agent 8 parts;
Rapid coagulation Timing agent 7 parts;
200 parts, water;
The organic fibre of length 6 ~ 12mm 3 parts;
Length 6 ~ 15mm, diameter 0.08 ~ 0.25 mm Cu coated fibre 150 parts.
7. the high-performance powder concrete printed for 3D according to claim 1, is characterized in that, described 3D prints high-performance powder concrete and is prepared from by the following method:
S1, the copper plated steel fiber limited by formula, organic fibre, silicate cement and active blending material add stirrer and are stirred to and are uniformly dispersed;
S2, the inert mineral admixture adding formula restriction again in stirrer, compound diminishing pulvis, thickening material, autogenous curing agent, the agent of rapid coagulation Timing continue to be stirred to evenly;
S3, the lay-by material be stirred by step S2 carry out packing and obtain powder;
S4, the powder obtained by step S3 carry out before printing putting into stirrer according to 3D building structure printing side amount and add corresponding restriction formula rate water, rapid stirring 1 ~ 2 minute, can become building structure 3D marking ink, formally print.
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