CN111978024A - Powder bonding 3D printing soft rock alkali-activated material and application method thereof - Google Patents
Powder bonding 3D printing soft rock alkali-activated material and application method thereof Download PDFInfo
- Publication number
- CN111978024A CN111978024A CN202010907923.0A CN202010907923A CN111978024A CN 111978024 A CN111978024 A CN 111978024A CN 202010907923 A CN202010907923 A CN 202010907923A CN 111978024 A CN111978024 A CN 111978024A
- Authority
- CN
- China
- Prior art keywords
- powder
- alkali
- group
- activated material
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/62—Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00181—Mixtures specially adapted for three-dimensional printing (3DP), stereo-lithography or prototyping
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00991—Uses not provided for elsewhere in C04B2111/00 for testing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Composite Materials (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The invention relates to a powder bonding 3D printing soft rock alkali-activated material and an application method thereof, wherein the alkali-activated material comprises the following components in parts by weight: 0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace slag powder, 0.05-0.15 part of silica fume, 0.4-0.6 part of quartz powder, 0.1-0.2 part of limestone powder, 0.005-0.02 part of clay, 0.05-0.2 part of alkali activator powder, 0.01-0.05 part of PVA powder, 0.002-0.005 part of glycerol, 0.002-0.005 part of cooling liquid and 0.2-0.4 part of water. The alkali-activated material can realize the printing of a soft rock mechanical property simulation model, can be smoothly taken out within 2h after the printing in the step (4), and has the compressive strength of more than 10MPa in 28 days.
Description
Technical Field
The invention relates to the field of geotechnical engineering and inorganic materials, in particular to a powder bonding 3D printing soft rock alkali-activated material and an application method thereof.
Background
The soft rock mass structure is a common structure in major infrastructure and energy engineering, and the research on the catastrophe mechanism and the damage characteristic of the soft rock mass structure is a foundation for ensuring the safety of the major infrastructure and the energy engineering. However, because the soft rock mass has discontinuous bodies and surfaces such as cracks and the like, no mature method for manufacturing the three-dimensional physical model of the soft rock mass exists internationally at present.
The 3D printing technology is an emerging technology in recent years, including many aspects of advanced technical knowledge, and has a high technological content of manufacturing technology, which has a very high degree of flexibility and automation, and has been used in the fields of biomedical, aerospace, mold manufacturing, electronic information manufacturing, automobile manufacturing, and the like. Among them, the powder bonding 3D printing technology is one of the widely applied technologies. The technology comprises the steps of firstly laying powder, then spraying a binder on the laid powder to bond and harden the powder, repeating the process, and stacking layer by layer to finally obtain the required three-dimensional object. The powder bonding 3D printing technology is adopted to prepare the soft rock physical model, so that the potential is great, and the research and development of 3D printing materials capable of simulating mechanical properties of soft rock and the like are the basis for preparing the physical model. Chinese patents CN104230289A, CN104291720A and CN104744000A each disclose a 3D printing material prepared using gypsum powder. However, the gypsum materials produced are of low strength and exhibit significant ductility and do not mimic the brittle nature of rock materials.
Based on the above problems, new green and environmentally friendly materials that can be used in powder bonding 3D printing technology must be sought. The alkali-activated material is a two-component green gelled material which is formed by taking fly ash and blast furnace slag as main active raw materials and taking alkali or sodium silicate as an activator. At present, alkali-activated materials are not widely applied to the powder bonding 3D printing technology, and the main problems are that the viscosity of the adopted activator is high, the activator cannot be directly used as a binder to be sprayed and printed through a spray head, and the binder sprayed in the powder bonding 3D printing process is difficult to be uniformly distributed in the existing alkali-activated powder, so that the existing alkali-activated materials are not suitable for the powder bonding 3D printing. Therefore, it is necessary to develop an alkali-activated composite material suitable for the powder bonding 3D printing technology, which is used for making a physical model of a soft rock mass.
Disclosure of Invention
The primary objects of the present invention are: the powder bonding 3D printing soft rock alkali-excited material for soft rock mechanical property simulation is provided, and is used for manufacturing a real physical model of a soft rock body.
Another object of the invention is: the application method for performing powder bonding 3D printing on the alkali-activated material is provided, and the advantages of the powder bonding 3D printing and the alkali-activated material are perfectly combined to manufacture the three-dimensional physical model with the strength and the brittleness similar to those of real soft rock.
The purpose of the invention is realized by the following technical scheme:
a powder bonding 3D printing type soft rock alkali-activated material for soft rock mechanical property simulation comprises the following components in parts by weight:
0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace slag powder, 0.05-0.15 part of silica fume, 0.4-0.6 part of quartz powder, 0.1-0.2 part of limestone powder, 0.005-0.02 part of clay, 0.05-0.2 part of alkali activator powder, 0.01-0.05 part of PVA powder, 0.002-0.005 part of glycerol, 0.002-0.005 part of cooling liquid and 0.2-0.4 part of water.
The maximum particle size of the fly ash is not more than 0.1 mm; the maximum grain size of the blast furnace slag powder is not more than 0.1 mm; the fineness of the silica fume is 1500-2000 meshes; the maximum grain size of the quartz powder is not more than 0.6 mm; the maximum particle size of the limestone powder is not more than 0.3 mm; the maximum particle size of the clay is not more than 0.1 mm; the maximum grain size of the alkali-activated powder is not more than 0.1 mm; the PVA powder is 300-400 meshes.
The clay can be at least one of attapulgite, kaolin and other mineral raw materials, and can be in a nanometer level.
The alkali activator powder can be one or more of sodium metasilicate, sodium silicate powder, potassium silicate powder, sodium hydroxide powder and potassium hydroxide powder, and the modulus of the potassium silicate and the sodium silicate is 1.5-3.3.
The cooling liquid can be organic solvents such as absolute ethyl alcohol and isopropanol, and can naturally volatilize and absorb heat, reduce printing temperature and protect a printing head.
The PVA powder is 300-400 meshes, and is preferably re-dispersible latex powder.
The following problems exist when printing objects using the powder bonding process: the particle size distribution of the powder material is not proper, so that the powder cannot be densely paved; after the binder is sprayed on the surface of the powder, the permeability is too large or too small, and the binder is unevenly distributed in the powder material; geopolymer composites harden too quickly or too slowly and are not suitable for powder-bonded 3D printing processes. The invention solves the problems by adopting the following means: (1) by designing the proportion of the powder, the particle size distribution of the powder material is optimized, and the dense laying of the powder material is realized; (2) PVA powder (re-dispersible latex powder) with a specific proportion and type is used, so that the permeability of the binder on the surface of the powder is improved, the permeability of the binder in the powder material reaches an ideal state, and the uniform distribution of the binder is realized; (3) the powder bonding type printing process is characterized in that a layer of powder of fly ash, an alkali activator and the like is paved firstly, then a binder is sprayed, the alkali activator in the form of powder is used, the alkali activator powder and other powder raw materials are uniformly mixed and paved, the used binder mainly uses water instead of an alkali activator solution as the binder, and the problem of high viscosity of the binder is effectively solved.
An application method of the alkali-activated material for powder bonding 3D printing is provided, namely, the powder bonding 3D printing is performed, and the method comprises the following steps:
(1) the raw materials are divided into two groups according to the parts by weight, wherein the first group is a powder material, and the other group is a binder. The first group is: 0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace slag powder, 0.05-0.15 part of silica fume, 0.4-0.6 part of quartz powder, 0.1-0.2 part of limestone powder, 0.005-0.02 part of clay, 0.05-0.2 part of alkali activator powder and 0.01-0.05 part of PVA powder. The second group is: 0.002 to 0.005 part of glycerin, 0.002 to 0.005 part of cooling liquid and 0.2 to 0.4 part of water.
(2) Simultaneously feeding the first group of powder materials into a stirrer for mixing and stirring until the first group of powder materials are uniformly mixed for about 10 min;
(3) dissolving 0.002-0.005 part of glycerol and 0.002-0.005 part of cooling liquid in the second group in 0.2-0.4 part of water to prepare a binder;
(4) firstly, a first group of powder materials are paved, a second group of binding agents are sprayed on the tiled powder to enable the powder to be bonded and hardened, the process is repeated, and the powder is stacked layer by layer to finally obtain the required 3D object. And spraying the adhesive in the corresponding area according to the rock physical model. The powder spreading thickness is 0.1-0.6 mm.
(5) And finally, performing later maintenance on the printed test piece to improve the strength of the material.
Compared with the prior art, the invention has the beneficial effects that:
1) the alkali-activated material is different from cement or gypsum in composition and comprises silicon-aluminum phase raw materials such as fly ash and industrial waste residue and an activator. The fly ash, the quartz powder, the alkali-activator powder and the like are used as powder materials to be paved, and the binder is mainly water. The powder material has excellent particle size grading distribution, the composition and the particle grading of the alkali-activated material are proper, the binder can be reasonably permeated and diffused on the alkali-activated material, the uniform distribution is realized, the paving is compact, the powder laying effect is good, and the powder material is suitable for powder adhesion 3D printing.
2) The binder adopted by the method is mainly water, the viscosity of the binder is similar to that of the water, the designed binder has low viscosity, and the sprayed binder can be uniformly distributed in the alkali-activated powder, so that the problems that in the prior art, most of liquid alkali-activated agents are adopted as the binder, the viscosity of the alkali-activated agents is high, the alkali-activated agents are difficult to spray from a spray head, and if the alkali-activated agents are required to be sprayed, a large-size spray head is required, so that the printing precision is greatly reduced are solved; secondly, the alkalinity of the alkali excitant is large, which can corrode the spray head and pollute the working environment, and the alkali liquor diffused in the air can also cause harm to human body.
3) The brittleness of the test piece prepared by the method is similar to that of rock, the mechanical property of the rock can be well simulated, the limit strain is about 0.2%, the test piece is closer to a rock material, and the defects that the compressive strength of the existing gypsum material is only about 1MPa, the compressive peak value strain is 1%, the strength is low, and the ductility is obvious are overcome.
Detailed Description
The present invention is further explained with reference to the following examples, which should not be construed as limiting the scope of the present invention.
The invention relates to a powder bonding 3D printing type soft rock alkali-activated material for soft rock mechanical property simulation, which comprises the following components in parts by weight:
0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace slag powder, 0.05-0.15 part of silica fume, 0.4-0.6 part of quartz powder, 0.1-0.2 part of limestone powder, 0.005-0.02 part of clay, 0.05-0.2 part of alkali activator powder, 0.01-0.05 part of PVA powder, 0.002-0.005 part of glycerol, 0.002-0.005 part of cooling liquid and 0.2-0.4 part of water.
The loss on ignition of the fly ash is 8.2 percent, the water content is 0.08 percent, the fineness is 26.5 percent of the residue of a square-hole sieve with the fineness of 45 mu m, and the maximum particle size is 0.1 mm. The maximum particle size of the blast furnace slag powder is 0.1 mm.
The density of the silica fume is 2.8g/cm3A specific surface area of 350m2/kg, with a fineness of 1500-.
The PVA powder is 300-400 meshes, and the density is 1.19-1.31 g/cm3。
The average grain size of the quartz powder is 350 mu m, and the maximum grain size is 0.6 mm.
The maximum particle size of the limestone powder is 0.3 mm.
The alkali activator powder can be one or more of sodium metasilicate, sodium silicate powder, potassium silicate powder, sodium hydroxide powder and potassium hydroxide powder, the modulus of the potassium silicate and the sodium silicate is 1.5-3.3, and the density is 2.6g/cm3The maximum particle size was 0.1 mm.
The clay can be one of attapulgite and kaolin, and the maximum particle size of the clay is 0.1 mm.
The cooling liquid can be one of absolute ethyl alcohol, isopropanol and glycerol.
The density of the blast furnace slag powder is 2.8g/cm3A specific surface area of 350m2Per kg, water content 0.3%, maximum particle size 85 μm. The strength of the excitation material can be enhanced.
A method of powder-bonded 3D printing using the alkali-activated material, the method comprising the steps of:
(1) the raw materials are divided into two groups according to the parts by weight, wherein the first group is a powder material, and the other group is a binder. The first group is: 0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace slag powder, 0.05-0.15 part of silica fume, 0.4-0.6 part of quartz powder, 0.1-0.2 part of limestone powder, 0.005-0.02 part of clay, 0.05-0.2 part of alkali activator powder and 0.01-0.05 part of PVA powder. The second group is: 0.002 to 0.005 part of glycerin, 0.002 to 0.005 part of cooling liquid and 0.2 to 0.4 part of water.
(2) Simultaneously feeding the first group of powder materials into a stirrer to be mixed and stirred for 10 min;
(3) dissolving 0.002-0.005 part of glycerol and 0.002-0.005 part of cooling liquid in the second group in 0.2-0.4 part of water to prepare a binder;
(4) firstly, a first group of powder materials are paved, a second group of binding agents are sprayed on the tiled powder to enable the powder to be bonded and hardened, the process is repeated, and the powder is stacked layer by layer to finally obtain the required 3D object. And spraying the adhesive in the corresponding area according to the rock physical model. The powder spreading thickness is 0.1-0.6 mm.
(5) And finally, performing post-maintenance treatment on the printed test piece to improve the strength of the material.
Example 1
The powder bonding 3D printing type soft rock alkali-activated material for soft rock mechanical property simulation comprises the following components in parts by weight:
1.0 part of fly ash, 1.0 part of blast furnace slag powder, 0.05 part of silica fume, 0.5 part of quartz powder, 0.15 part of limestone powder, 0.01 part of clay, 0.15 part of alkali activator powder, 0.03 part of PVA powder, 0.003 part of glycerol, 0.003 part of cooling liquid and 0.3 part of water.
The loss on ignition of the fly ash is 8.2 percent, the water content is 0.08 percent, the fineness is 26.5 percent of the residue of a square-hole sieve with the fineness of 45 mu m, and the maximum particle size is 0.1 mm.
The alkali activator is anhydrous sodium metasilicate powder.
The PVA powder is 300-400 meshes, and the density is 1.19-1.31 g/cm3。
The quartz powder has an average particle size of 350 μm, a maximum particle size of 0.6mm, and a specific surfaceProduct 0.155m2/g。
A method of powder-bonded 3D printing using the alkali-activated material, the method comprising the steps of:
(1) the raw materials are divided into two groups according to the parts by weight, wherein the first group is a powder material, and the other group is a binder. The first group is: 1.0 part of fly ash, 1.0 part of blast furnace slag powder, 0.05 part of silica fume, 0.5 part of quartz powder, 0.15 part of limestone powder, 0.01 part of clay, 0.15 part of anhydrous sodium metasilicate powder and 0.03 part of PVA powder. The second group is: 0.003 part of glycerol, 0.003 part of cooling liquid and 0.3 part of water.
(2) Simultaneously feeding the first group of powder materials into a stirrer to be mixed and stirred for 10 min;
(3) dissolving 0.003 part of glycerol and 0.003 part of cooling liquid in 0.3 part of water to prepare a binder;
(4) firstly, a first group of powder materials are paved, a second group of binding agents are sprayed on the tiled powder to enable the powder to be bonded and hardened, the process is repeated, and the powder is stacked layer by layer to finally obtain the required 3D object. And spraying the adhesive in the corresponding area according to the rock physical model. The powder spreading thickness is 0.3 mm.
(5) And finally, curing the printed test piece in a 60 ℃ high-temperature curing box.
Printing was performed using this example, resulting in a printed structure. The printing process is smooth, and the printed structure has good integrity and good stability. The compressive strength was 10.2MPa and 18MPa for 3 days and 28 days, respectively. The material is suitable for simulating the mechanical properties of soft rock.
Comparative examples 1-3, the material ratio and the preparation process of the printed structure were the same as in example 1, except that the content of PVA powder was changed, and the specific experimental results are shown in the following table.
Comparative examples 4 to 6, the material ratio and the preparation process of the printed structure were the same as those of example 1, except that the content of the alkali activator powder was changed, and the specific experimental results are shown in the following table.
Example 2
The invention relates to a powder bonding 3D printing type soft rock alkali-activated material for soft rock mechanical property simulation, which comprises the following components in parts by weight:
0.8 part of fly ash, 1.0 part of blast furnace slag powder, 0.07 part of silica fume, 0.6 part of quartz powder, 0.10 part of limestone powder, 0.005 part of clay, 0.12 part of alkali activator powder, 0.02 part of PVA powder, 0.002 part of glycerol, 0.004 part of cooling liquid and 0.35 part of water.
The loss on ignition of the fly ash is 8.2 percent, the water content is 0.08 percent, the fineness is 26.5 percent of the residue of a square-hole sieve with the fineness of 45 mu m, and the maximum particle size is 0.1 mm.
The density of the blast furnace slag powder is 2.8g/cm3A specific surface area of 350m2Per kg, water content 0.3%, maximum particle size 85 μm.
The alkali activator powder comprises 0.07 part of sodium silicate powder and 0.05 part of sodium hydroxide powder, and the modulus of the sodium silicate powder is 2.0.
The PVA powder is 300-400 meshes, and the density is 1.19-1.31 g/cm3。
The average grain diameter of the quartz powder is 350 mu m, the maximum grain diameter is 0.6mm, and the specific surface area is 0.155m2/g。
A method of powder-bonded 3D printing using the alkali-activated material, the method comprising the steps of:
(1) the raw materials are divided into two groups according to the parts by weight, wherein the first group is a powder material, and the other group is a binder. The first group is 0.8 part of fly ash, 1.0 part of blast furnace slag powder, 0.07 part of silica fume, 0.6 part of quartz powder, 0.10 part of limestone powder, 0.005 part of clay, 0.07 part of sodium silicate powder, 0.05 part of sodium hydroxide powder and 0.02 part of PVA powder. The second group is: 0.002 parts of glycerol, 0.004 parts of cooling liquid and 0.35 part of water.
(2) Simultaneously feeding the first group of powder materials into a stirrer to be mixed and stirred for 10 min;
(3) dissolving 0.002 parts of glycerol and 0.004 parts of cooling liquid in the second group in 0.35 part of water to prepare a binder;
(4) firstly, a first group of powder materials are paved, a second group of binding agents are sprayed on the tiled powder to enable the powder to be bonded and hardened, the process is repeated, and the powder is stacked layer by layer to finally obtain the required 3D object. And spraying the adhesive in the corresponding area according to the rock physical model. The powder spreading thickness is 0.3 mm.
(5) And finally, soaking the printed test piece into 20% sodium hydroxide, and then curing in a high-temperature curing box at 60 ℃.
Printing was performed using this example, resulting in a printed structure. The printing process is smooth, and the printed structure has good integrity and good stability. The compressive strengths of the steel sheets were 11MPa and 28MPa in 3 days and 28 days, respectively. The material is suitable for simulating the mechanical properties of soft rock.
Comparative examples 7-9, the material ratio and the preparation process of the printed structure were the same as those of example 2, except that the content of the cooling liquid was changed, and the specific experimental results are shown in the following table.
The excited material can realize the printing of a soft rock mechanical property simulation model, and meets the following two points that 1, the excited material can be smoothly taken out in a short time (within 2 h) after being printed, even can be printed just after being beaten, and the compressive strength reaches more than 10MPa in 2.28 days.
Nothing in this specification is said to apply to the prior art.
Claims (9)
1. The powder bonding 3D printing soft rock alkali-activated material is characterized by comprising the following components in parts by weight:
0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace slag powder, 0.05-0.15 part of silica fume, 0.4-0.6 part of quartz powder, 0.1-0.2 part of limestone powder, 0.005-0.02 part of clay, 0.05-0.2 part of alkali activator powder, 0.01-0.05 part of PVA powder, 0.002-0.005 part of glycerol, 0.002-0.005 part of cooling liquid and 0.2-0.4 part of water.
2. The alkali-activated material of claim 1, wherein the fly ash has a maximum particle size of no greater than 0.1 mm; the maximum grain size of the blast furnace slag powder is not more than 0.1 mm; the fineness of the silica fume is 1500-2000 meshes; the maximum grain size of the quartz powder is not more than 0.6 mm; the maximum particle size of the limestone powder is not more than 0.3 mm; the maximum particle size of the clay is not more than 0.1 mm; the maximum grain size of the alkali-activated powder is not more than 0.1 mm; the PVA powder is 300-400 meshes.
3. The alkali-activated material of claim 1, wherein the clay is at least one of attapulgite and kaolin, and the clay has a particle size of nanometer order.
4. The alkali-activated material as claimed in claim 1, wherein the alkali activator powder is one or more selected from sodium metasilicate, sodium silicate, potassium silicate, sodium hydroxide and potassium hydroxide, and the modulus of potassium silicate and sodium silicate is 1.5 to 3.3; the cooling liquid is absolute ethyl alcohol or isopropanol; the PVA powder is re-dispersible latex powder.
5. The alkali-activated material of claim 1, wherein the alkali-activated material is used in soft rock mechanical property simulation.
6. A method of applying the alkali-activated material of any one of claims 1 to 5 for powder-bonded 3D printing, the method comprising the steps of:
(1) dividing the raw materials into two groups according to the parts by weight, wherein the first group is a powder material, and the other group is a binder; the first group is: 0.6-1.3 parts of fly ash, 0.6-1.3 parts of blast furnace slag powder, 0.05-0.15 part of silica fume, 0.4-0.6 part of quartz powder, 0.1-0.2 part of limestone powder, 0.005-0.02 part of clay, 0.05-0.2 part of alkali activator powder and 0.01-0.05 part of PVA powder; the second group is: 0.002-0.005 part of glycerol, 0.002-0.005 part of cooling liquid and 0.2-0.4 part of water;
(2) simultaneously feeding the first group of powder materials into a stirrer for mixing and stirring until the first group of powder materials are uniformly mixed;
(3) dissolving 0.002-0.005 part of glycerol and 0.002-0.005 part of cooling liquid in the second group in 0.2-0.4 part of water to prepare a binder;
(4) firstly, laying a first group of powder materials, spraying a second group of adhesive on the tiled powder to bond and harden the powder, repeating the process, and stacking layer by layer to finally obtain the required 3D object; spraying a binder in the corresponding area according to the rock physical model;
(5) and finally, performing later maintenance on the printed test piece to obtain a three-dimensional physical model of the soft rock mass.
7. The use method as claimed in claim 6, wherein the powder-laying thickness of each layer in the step (4) is 0.1-0.6 mm.
8. The application method of claim 7, wherein the weight ratio of the fly ash to the blast furnace slag powder is 0.8-1.1; the density of the blast furnace slag powder is 2.8g/cm3A specific surface area of 350m2Per kg, water content 0.3%, maximum particle size 85 μm.
9. The application method of claim 7, wherein the alkali-activated material can be printed on a soft rock mechanical property simulation model, and can be smoothly taken out within 2h after being printed in the step (4), and the 28-day compressive strength of the alkali-activated material reaches more than 10 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010907923.0A CN111978024B (en) | 2020-09-02 | 2020-09-02 | Powder bonding 3D printing soft rock alkali-activated material and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010907923.0A CN111978024B (en) | 2020-09-02 | 2020-09-02 | Powder bonding 3D printing soft rock alkali-activated material and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111978024A true CN111978024A (en) | 2020-11-24 |
| CN111978024B CN111978024B (en) | 2021-04-27 |
Family
ID=73448667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010907923.0A Active CN111978024B (en) | 2020-09-02 | 2020-09-02 | Powder bonding 3D printing soft rock alkali-activated material and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111978024B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180885A (en) * | 2022-07-01 | 2022-10-14 | 佛山市交通科技有限公司 | 3D printing fly ash-based alkali-activated material and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107298546A (en) * | 2017-06-16 | 2017-10-27 | 南京理工大学 | Alkali-activated carbonatite binder materials and its Method of printing for 3D printing |
| KR20180075774A (en) * | 2016-12-26 | 2018-07-05 | 주식회사 세릭 | ceramic product of cement having self-healing performance for 3D print |
| CN108290390A (en) * | 2015-11-24 | 2018-07-17 | 西格里碳素欧洲公司 | The 3D printing of ceramic component |
| CN108529968A (en) * | 2018-04-25 | 2018-09-14 | 浙江大学 | A kind of fiber concrete material and preparation method thereof for 3D printing |
| CN109400031A (en) * | 2018-12-29 | 2019-03-01 | 河北工业大学 | 3D printing The Zhaozhou Bridge plant fiber enhances ground polymers and preparation method thereof |
-
2020
- 2020-09-02 CN CN202010907923.0A patent/CN111978024B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108290390A (en) * | 2015-11-24 | 2018-07-17 | 西格里碳素欧洲公司 | The 3D printing of ceramic component |
| KR20180075774A (en) * | 2016-12-26 | 2018-07-05 | 주식회사 세릭 | ceramic product of cement having self-healing performance for 3D print |
| CN107298546A (en) * | 2017-06-16 | 2017-10-27 | 南京理工大学 | Alkali-activated carbonatite binder materials and its Method of printing for 3D printing |
| CN108529968A (en) * | 2018-04-25 | 2018-09-14 | 浙江大学 | A kind of fiber concrete material and preparation method thereof for 3D printing |
| CN109400031A (en) * | 2018-12-29 | 2019-03-01 | 河北工业大学 | 3D printing The Zhaozhou Bridge plant fiber enhances ground polymers and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180885A (en) * | 2022-07-01 | 2022-10-14 | 佛山市交通科技有限公司 | 3D printing fly ash-based alkali-activated material and preparation method and application thereof |
| CN115180885B (en) * | 2022-07-01 | 2023-08-22 | 佛山市交通科技有限公司 | 3D printing fly ash-based alkali excitation material and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111978024B (en) | 2021-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nematollahi et al. | Effect of type of fiber on inter-layer bond and flexural strengths of extrusion-based 3D printed geopolymer | |
| CN109336492B (en) | High-impermeability concrete | |
| Al Bakri et al. | The processing, characterization, and properties of fly ash based geopolymer concrete | |
| CN113277791A (en) | Industrial solid waste geopolymer material for building 3D printing and preparation method thereof | |
| CN113087534B (en) | High-temperature-resistant alkali-activated aluminosilicate binder and preparation method thereof | |
| CN109384437B (en) | Hybrid fiber cement-based composite material for 3D printing and preparation method thereof | |
| CN111548084A (en) | Jet reinforced high-ductility concrete and preparation method thereof | |
| CN112028551B (en) | 3D printing geopolymer for complex rock physical model and use method thereof | |
| CN111978024B (en) | Powder bonding 3D printing soft rock alkali-activated material and application method thereof | |
| CN112456941A (en) | Autoclaved aerated concrete plate and preparation method thereof | |
| George et al. | Production and utilisation of artificial coarse aggregate in concrete-a review | |
| CN112573868B (en) | Granite micro-powder geopolymer composite base and preparation method and application thereof | |
| KR20120044014A (en) | Geopolymer composition having high strength and manufacturing method thereof | |
| CN111960755A (en) | Fine concrete with dredged sand as main raw material and preparation method thereof | |
| CN110590329A (en) | Foamed ceramic and preparation method thereof | |
| CN110590328A (en) | Foamed ceramic and preparation method thereof | |
| CN112759338B (en) | Slag-based cementing material for 3D printing and preparation method thereof | |
| CN112759298B (en) | Material for powder 3D printing test model and preparation method thereof | |
| CN109206080A (en) | It is a kind of using aluminium ash and waste residue manufacture inorganic artificial stone and its manufacturing method | |
| CN114014594A (en) | All-solid-waste ultrahigh-performance geopolymer concrete and preparation method thereof | |
| CN112299787A (en) | Method for preparing red regenerated bread bricks by using waste red brick grinding materials | |
| CN111205005A (en) | Cementing material, application and concrete | |
| CN112745074A (en) | High-ductility cement-based artificial stone | |
| CN111348863A (en) | Graphene/stone composite board and preparation method thereof | |
| CN115849747B (en) | Gangue-slag base polymer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |