CN110256039B - Lunar soil concrete and preparation method thereof - Google Patents
Lunar soil concrete and preparation method thereof Download PDFInfo
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- CN110256039B CN110256039B CN201910612421.2A CN201910612421A CN110256039B CN 110256039 B CN110256039 B CN 110256039B CN 201910612421 A CN201910612421 A CN 201910612421A CN 110256039 B CN110256039 B CN 110256039B
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- 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
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- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- 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
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- 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
- C04B28/30—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 magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
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- 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
- C04B2111/00146—Sprayable or pumpable mixtures
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- 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
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
Abstract
The invention relates to lunar soil 'concrete' and a preparation method thereof, which are mainly used in the technical fields of aerospace, aviation, building coatings and the like. The lunar soil 'concrete' mixed 3D printing technology is an important key technology for construction of subsequent lunar surface bases of the future moon, and the lunar soil simulant mixed 3D printing device can realize continuous and controllable extrusion molding of lunar soil 'concrete' by designing the lunar soil simulant mixed 3D printing head. The hybrid 3D printing head is a key component of the lunar soil hybrid printing device and is used for realizing continuous and controllable extrusion of lunar soil concrete. The device is a functional assembly integrating parts such as a driving motor, a coupler, a screw pump, a connector, a screw extrusion device, a printing nozzle and the like, and realizes continuous and controllable extrusion molding of lunar soil concrete materials.
Description
Technical Field
The invention relates to lunar soil 'concrete' and a preparation method thereof, which are mainly used in the technical fields of aerospace, aviation, building coatings and the like.
Background
The development plan of Chang' e lunar exploration project in China has successfully completed two stages of winding and falling, namely the third stage of returning. A long-term life and scientific research base is established on the moon, and becomes an achievable plan more and more. The establishment of the lunar-based large facility can bring many benefits, scientific activities such as space observation and the like can be better developed by depending on the advantages of no atmosphere layer and the like of the moon, the lunar-based large facility can become a sentinel position for human beings to carry out scientific research in the future, rich lunar soil resources existing on the moon can be exploited, and the moon can be used as a platform to provide important support for deep space exploration in China. The formation of actual lunar soil is mainly controlled by physical disruption, where merle and micromineral strikes play a dominant role. As the meteorite device generates high-temperature melting and crushing actions due to impact, lunar soil often contains glass spheres, bonding particles, basalt, breccia fragments and the like, the particle composition is complex, the interior of the lunar soil is lack of water, and the whole lunar soil is in the nature of discrete particles. Lunar soil exhibits the following typical properties: (1) the internal friction angle is large, and because of the lack of the carrying and abrasion effects of water power and wind power, the particle edges and corners of the lunar soil are generally obvious, so that the internal friction angle is large, and the internal friction angle of the compact lunar soil is as high as 50 degrees. (2) The compactness is high, the lunar soil is formed to be subjected to long-term meteorite impact, and the lunar soil presents very high compactness due to vibration formed by the impact. (3) Lunar soil with complex lunar soil gradation and different landing areas has uncertainty.
The establishment of a long-term life on the moon requires the construction of a lunar base, and the in-situ resources that can be used for the construction of the lunar base are basically lunar soil.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: overcomes the defects of the prior art and provides lunar soil concrete and a preparation method thereof.
The technical solution of the invention is as follows:
the lunar soil 'concrete' comprises lunar soil simulants, magnesium oxide, magnesium chloride and water; calculated by taking the mass of the lunar soil simulant as 100 parts, the mass parts of magnesium oxide are 19-20 parts, the mass parts of magnesium chloride are 5-6 parts, and the mass parts of water are 13-14 parts.
A preparation method of lunar soil 'concrete' uses devices including a driving motor, a coupler, a screw extrusion device and a printing nozzle; the printing nozzle comprises a spray head and a shell, wherein the spray head is made of nylon, and the shell is made of 316 stainless steel;
the driving motor is connected with the coupler, the coupler is connected with the screw extrusion device, and the printing nozzle is connected with the extrusion end of the screw extrusion device; the screw extrusion device is provided with a feed inlet;
the driving motor drives the coupler to rotate after being started, the coupler drives the screw rod in the screw rod extrusion device to rotate, mixed extrusion of materials in the screw rod extrusion device is realized in the screw rod rotation process, and an extruded material is printed and molded through the printing nozzle;
the method comprises the following steps: adding lunar soil concrete into the screw extrusion device through a feed inlet on the screw extrusion device, and then starting the driving motor to complete the extrusion molding of the lunar soil concrete.
Compared with the prior art, the invention has the advantages that:
(1) the continuous and controllable small-batch feeding mode realizes instant filling of small-batch lunar soil simulant mixtures by connecting the 3D printing funnel with a certain size, prevents blockage and scrapping of a printing head caused by short-time solidification of a large amount of slurry, and is easier to realize regulation and control of process parameters.
(2) The continuous and controllable large-batch feeding mode is realized by adopting the high-pressure resistant pipe with a certain length, and the lunar soil analogue hybrid 3D printing with the maximum motion stroke of 2m by 1m can be realized. Through set up the feeding interface on the print head, can connect the discharge end of anti high-pressure pipe, the lunar soil simulant thick liquids that stir get into behind the discharge gate of anti high-pressure pipe through screw rod material feeding unit's feed inlet and beat printer head, feed inlet and discharge gate through anti high-pressure pipe form circulation system, realize the flow transmission of lunar soil "concrete" after the mixture, the thick liquids through driving motor control misce bene enter into and beat printer head to realize 2m 1m large-scale structure appearance spare and make.
(3) The lunar soil concrete mixed 3D printing technology is an important key technology for construction of subsequent lunar surface bases of the future moon, and the lunar soil analogue mixed 3D printing device can realize continuous and controllable extrusion molding of lunar soil concrete by designing the lunar soil analogue mixed 3D printing head. The hybrid 3D printing head is a key component of the lunar soil hybrid printing device and is used for realizing continuous and controllable extrusion of lunar soil concrete. The device is a functional assembly integrating parts such as a driving motor, a coupler, a screw pump, a connector, a screw extrusion device, a printing nozzle and the like, and realizes continuous and controllable extrusion molding of lunar soil concrete materials.
(4) At present, the concrete 3D printing device for building materials usually enters the extrusion device by stirring slurry through a metal feeding funnel arranged above an extrusion head, the number of the discharged materials at the tail end of the extrusion head is limited, the materials are required to be fed through the metal feeding funnel for multiple times, and continuous feeding cannot be realized. The mass feeding has two limitations, one is easy to cause the waste of raw materials, and the other is easy to cause the blockage and even the scrapping of the printing head due to the over-high curing speed of the mixture in the initial test stage of the lunar soil concrete mixing process.
(5) The problem that the feeding amount of lunar soil concrete is not appropriate or a printing head is easy to block in a mixing process test stage is solved, and a printing funnel and a nozzle are formed through 3D printing, so that the filling method is easy to replace and low in cost, and can meet the filling requirements of small-batch lunar soil concrete slurry in a process test and large-batch lunar soil concrete slurry for a large structure with the maximum stroke of 2m 1 m.
(6) In particular to a mixed 3D printing of lunar soil simulant with the particle size of 10-100 mu m, light weight and large specific surface area, which can realize the filling of small-batch lunar soil simulant and the continuous filling of large-batch lunar soil simulant. Through set up feeding interface on the print head, can connect the discharge end of high-pressure resistant pipe, the moon soil simulant thick liquids that stir get into behind the discharge gate that high-pressure resistant pipe through screw rod material feeding unit's feed inlet and get into and beat printer head, the feed inlet and the discharge gate through high-pressure resistant pipe form circulation system, realize the flow transmission of the moon soil "concrete" after the mixture, the thick liquids that control the misce bene through driving motor get into and beat printer head to realize 2m 1m large-scale structural component's manufacturing. And the feeding interface of the printing head can be connected with a 3D printing funnel with a certain size, so that the lunar soil simulant slurry can be directly filled in small batches, and the method is suitable for a process groping test at the initial test stage of a structural member to be printed.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic view of the internal structure of the apparatus of the present invention;
FIG. 3 is a schematic view of a printhead according to the present invention connected to a feed hopper.
Detailed Description
Through set up the feeding interface on the print head, can connect the discharge end of anti high-pressure pipe, realize that the biggest stroke is 2m 1 m's large structure spare and prints to can connect the 3D of certain size and print the funnel on the print head, realize the instant filling of small batch lunar soil simulant mixture, prevent that a large amount of thick liquids from solidifying in short-term and causing the jam of beating the printer head and scrap even, realize technological parameter's regulation and control more easily.
Step 1: and designing the structure of the printing head assembly by using modeling software.
Step 2: 3D printing materials (such as nylon) with the printing precision of 0.1mm are selected as materials of a printing head nozzle, and controllable extrusion of lunar soil concrete slurry is guaranteed.
And step 3: the material with good corrosion resistance (such as 316 stainless steel) is selected as the shell material of the printing head, so that the corrosion of lunar soil 'concrete' material to the printing head is reduced.
And 4, step 4: connect feed hopper on the print head, pour into feed hopper with mixture such as lunar soil simulant, turn on motor switch, mix thick liquids and get into through the cavity and beat printer head, can carry out the printing of small batch.
And 5: one end of a high-pressure resisting pipe is connected to the printing head, the other end of the high-pressure resisting pipe is connected to the screw feeding device, and lunar soil slurry is extruded from the screw feeding device and then is conveyed to the printing nozzle through the high-pressure resisting pipe.
Step 6: using an extrusion command, the lunar soil slurry is extruded from the nozzle. The flow of the nozzle is controlled by the rotating speed of the driving motor, and the continuous and controllable extrusion molding of the lunar soil concrete is realized by matching with the movement speed of the 3D printing device.
Examples
A lunar soil 'concrete' is prepared by uniformly mixing lunar soil simulant and additive in a certain proportion, and preparing a viscous mixed material system suitable for 3D printing of lunar surface facilities. The weight ratio of the mixed material system consisting of the lunar soil simulant and the additive is as follows: the lunar soil simulant is calculated by 15kg, the weight portion of magnesium oxide is 2.8kg, the weight portion of magnesium chloride is 0.9kg, and the weight portion of water is 2 kg.
A preparation method of lunar soil 'concrete' uses devices including a driving motor, a coupler, a screw extrusion device and a printing nozzle, as shown in figures 1-3, the printing nozzle is made of nylon;
the driving motor is connected with the coupler, the coupler is connected with the screw extrusion device, and the printing nozzle is connected with the extrusion end of the screw extrusion device; the screw extrusion device is provided with a feed inlet;
the driving motor drives the coupler to rotate after being started, the coupler drives the screw rod in the screw rod extrusion device to rotate, mixed extrusion of materials in the screw rod extrusion device is realized in the screw rod rotation process, and an extruded material is printed and molded through the printing nozzle;
the method comprises the following steps: adding lunar soil concrete into the screw extrusion device through a feed inlet on the screw extrusion device, and then starting the driving motor to complete the extrusion molding of the lunar soil concrete.
The 3D printing nozzle with the internal threads, which is made of PA12 material, has the precision reaching 0.1mm, is connected to the tail end of the screw extrusion device through the internal threads, so that the requirements of lunar soil simulant hybrid 3D printing forming and mechanical property can be met, and the mixed material composed of lunar soil simulant and additive is easy to extrude and separate through the nozzle, and is easy to disassemble and replace after long-time work.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (1)
1. The lunar soil 'concrete' is characterized in that: the lunar soil concrete comprises lunar soil simulant, magnesium oxide, magnesium chloride and water; calculated by taking the mass parts of the lunar soil simulant as 100 parts, the mass parts of magnesium oxide are 19-20 parts, the mass parts of magnesium chloride are 5-6 parts, and the mass parts of water are 13-14 parts;
the mass of the lunar soil simulant is 15 kg;
the mass of the magnesium oxide is 2.8 kg;
the mass of the magnesium chloride is 0.9 kg;
the mass of water is 2 kg;
the preparation method of the lunar soil concrete comprises the following steps: adding lunar soil concrete into a screw extrusion device through a feed inlet on the screw extrusion device, and then starting a driving motor to complete the extrusion molding of the lunar soil concrete;
the device used by the method comprises a driving motor, a coupler, a screw extrusion device and a printing nozzle;
the driving motor is connected with the coupler, the coupler is connected with the screw extrusion device, and the printing nozzle is connected with the extrusion end of the screw extrusion device; the screw extrusion device is provided with a feed inlet;
the driving motor drives the coupler to rotate after being started, the coupler drives the screw rod in the screw rod extrusion device to rotate, mixed extrusion of materials in the screw rod extrusion device is realized in the screw rod rotation process, and an extruded material is printed and molded through the printing nozzle;
the printing nozzle comprises a spray head and a shell;
the material of the spray head is nylon;
the material of the housing is 316 stainless steel.
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| CN201910612421.2A CN110256039B (en) | 2019-07-08 | 2019-07-08 | Lunar soil concrete and preparation method thereof |
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| CN201910612421.2A CN110256039B (en) | 2019-07-08 | 2019-07-08 | Lunar soil concrete and preparation method thereof |
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| CN110256039A CN110256039A (en) | 2019-09-20 |
| CN110256039B true CN110256039B (en) | 2021-06-11 |
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| CN112620647A (en) * | 2020-12-15 | 2021-04-09 | 华中科技大学 | High-strength part 3D printing method and device for lunar environment |
| CN114474717B (en) * | 2021-12-28 | 2022-09-16 | 哈尔滨工业大学 | Powder bed cladding additive manufacturing device and method for constructing interplanetary base |
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| JP2009167761A (en) * | 2008-01-21 | 2009-07-30 | Nippon Sutakko Kk | Self-leveling material, finishing method of floor surface using this material and floor surface |
| CN105906304A (en) * | 2016-04-19 | 2016-08-31 | 兰州理工大学 | Water-proof type magnesium oxychloride cement concrete and a preparing method thereof |
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| JP2009167761A (en) * | 2008-01-21 | 2009-07-30 | Nippon Sutakko Kk | Self-leveling material, finishing method of floor surface using this material and floor surface |
| CN105906304A (en) * | 2016-04-19 | 2016-08-31 | 兰州理工大学 | Water-proof type magnesium oxychloride cement concrete and a preparing method thereof |
| CN208557866U (en) * | 2018-05-29 | 2019-03-01 | 中建西部建设西南有限公司 | A kind of concrete 3D printing spray head and printer |
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