Temperature-sensitive concrete slurry and concrete 3D printing temperature control forming construction method

Abstract

The invention relates to temperature-sensitive concrete slurry and a concrete 3D printing temperature-control forming construction method, and relates to the field of 3D printing concrete, and the method comprises the following steps: obtaining an application scene and a printing demand; determining the type of a temperature-sensitive material based on the application scene; searching a corresponding material doping proportion from a preset response database based on the printing demand and the type of the temperature-sensitive material; the temperature-sensitive concrete slurry is formed based on the material doping proportion and is printed, and the temperature control instruction is executed, so that the physical characteristics of the concrete are adjusted by controlling the temperature of the concrete, and rapid hardening, continuous printing, strength improvement and function diversification of the concrete are realized; the structural strength and the stability of the concrete are improved.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing concrete, and in particular to a temperature-sensitive concrete slurry and a concrete 3D printing temperature-controlled molding construction method. Background Art

[0002] 3D printing technology, also known as additive manufacturing technology, is an advanced manufacturing method that manufactures three-dimensional objects by stacking materials layer by layer based on digital model files. At present, 3D printing technology has been deeply explored and widely used in many fields such as manufacturing, automotive industry, healthcare, aerospace and energy equipment. Especially in the field of construction, concrete 3D printing technology has brought revolutionary changes to building design, production and construction with its high manufacturing efficiency, strong design flexibility, excellent resource utilization and outstanding production consistency. At the same time, concrete 3D printing technology can not only significantly shorten the construction cycle and reduce construction costs, but also realize the precise construction of complex geometric shapes, providing architects with unprecedented innovation possibilities.

[0003] In the field of construction, extrusion 3D concrete printing technology is the most basic and widely used type of printing. This technology uses a layer-by-layer concrete extrusion process to eventually form the desired building structure or component.

[0004] The following problems exist in the prior art: since the concrete itself solidifies slowly, as the number of printed layers increases, the cumulative load borne by the bottom concrete gradually increases, causing deformation or insufficient strength of the bottom structure, which in turn affects the stability of the overall structure. There is still room for improvement. Summary of the invention

[0005] In order to improve the problem that the concrete itself solidifies slowly, as the number of printed layers increases, the cumulative load borne by the bottom concrete gradually increases, resulting in deformation or insufficient strength of the bottom structure, which in turn affects the stability of the overall structure. The present application provides a temperature-sensitive concrete slurry and a concrete 3D printing temperature-controlled molding construction method.

[0006] In a first aspect, the present application provides a temperature-sensitive concrete slurry, which adopts the following technical solution: A temperature-sensitive concrete slurry comprises a first concrete layer, wherein a temperature-sensitive component made of a temperature-sensitive material is mixed in the first concrete layer.

[0007] By adopting the above technical solution and introducing temperature-sensitive materials inside the concrete 3D printer, the physical properties of the concrete can be adjusted by controlling the temperature of the concrete, ensuring that the printing process achieves the expected effect, thereby achieving rapid hardening, continuous printing, strength improvement and functional diversification of the concrete, thereby improving the structural strength and stability of the concrete.

[0008] Optionally, there are two types of temperature-sensitive materials corresponding to the temperature-sensitive component.

[0009] By adopting the above technical solution, different types of temperature-sensitive materials can be used to flexibly change the properties of concrete in response to different problems in concrete, thereby expanding the scope of use of concrete.

[0010] Optionally, it further includes a first temperature-sensitive material layer made of a temperature-sensitive material, the number of the first concrete layers is several and they are arranged in the form of upper and lower layers, and the first temperature-sensitive material layer is arranged between two adjacent first concrete layers.

[0011] By adopting the above technical solution, the thermosensitive material is added to the surface of the printed concrete. The characteristic of the thermosensitive material that its overall hardness will change when the temperature changes is utilized. When the temperature changes, the overall voids of the thermosensitive material are reduced to form a hard and durable three-dimensional cross-linked network structure. This process increases the stiffness and forms a dense structure that can support each layer of cement and form a skeleton to support the cement formation.

[0012] In a second aspect, the present application provides a temperature-sensitive concrete slurry, which adopts the following technical solution: A temperature-sensitive concrete slurry comprises a second concrete layer and a second temperature-sensitive material layer. The second concrete layers are multiple in number and are arranged in the form of upper and lower layers. The second temperature-sensitive material layer is arranged between two adjacent second concrete layers.

[0013] By adopting the above technical solution, the thermosensitive material is added to the surface of the printed concrete. The characteristic of the thermosensitive material that its overall hardness will change when the temperature changes is utilized. When the temperature changes, the overall voids of the thermosensitive material are reduced to form a hard and durable three-dimensional cross-linked network structure. This process increases the stiffness and forms a dense structure that can support each layer of cement and form a skeleton to support the cement formation.

[0014] In a third aspect, the present application provides a concrete 3D printing temperature-controlled molding construction method, which adopts the following technical solution: A concrete 3D printing temperature-controlled molding construction method, applied to a temperature-sensitive concrete slurry as described above, comprises: Obtain application scenarios and printing requirements; Determine the type of temperature-sensitive material based on the application scenario; Based on the printing requirements and the type of temperature-sensitive materials, the corresponding material mixing ratio is found from the preset response database; A temperature-sensitive concrete slurry is formed and printed based on the material mixing ratio, and temperature control instructions are executed.

[0015] By adopting the above technical solution, the type of temperature-sensitive material is determined based on the application scenario, and then the mixing ratio and temperature control conditions are determined according to the printing requirements. The physical properties of concrete are adjusted by controlling the temperature of concrete to ensure that the printing process achieves the expected results, thereby achieving rapid hardening of concrete, continuous printing, strength improvement and functional diversification, and improving the structural strength and stability of concrete.

[0016] Optionally, also include: Based on the printing requirements and the type of temperature-sensitive materials, the corresponding theoretical negative feedback state is found from the preset feedback database; Monitor and obtain response status during printing; When the response state is a theoretical negative feedback state, a preset deceleration instruction is output; When the response state is not a theoretical negative feedback state, the response state continues to be acquired.

[0017] By adopting the above technical solution, when the temperature and humidity sensors detect environmental changes at the same time, the response state of the thermosensitive material aggregate can be judged more accurately. If the humidity is high, it may be necessary to adjust the temperature of the temperature adjustment rod to compensate for the impact of humidity on the thermosensitive material and ensure that the density and pore quantity inside the concrete are controlled within a reasonable range.

[0018] Optionally, a specific method for forming a temperature-sensitive concrete slurry based on a material mixing ratio and printing includes: Acquire a printing drawing, and determine a printing trajectory based on the printing drawing, wherein the printing trajectory includes a concrete printing trajectory and a temperature-sensitive material layer printing trajectory; Determine whether there is a temperature-sensitive material layer; When there is a temperature-sensitive material layer, determining whether the quantity corresponding to the type of temperature-sensitive material is 1; When the number corresponding to the temperature-sensitive material type is not 1, the temperature-sensitive material type corresponding to the temperature-sensitive element is defined as a first temperature-sensitive material type, the material incorporation ratio corresponding to the first temperature-sensitive material type is defined as a first material incorporation ratio, the temperature-sensitive material type corresponding to the first temperature-sensitive material layer is defined as a second temperature-sensitive material type, and the material incorporation ratio corresponding to the second temperature-sensitive material type is defined as a second material incorporation ratio; Controlling the first extrusion port of the 3D printer to add the temperature-sensitive material and cement corresponding to the first temperature-sensitive material type according to the first material mixing ratio, and adding the temperature-sensitive material corresponding to the second temperature-sensitive material type according to the second material mixing ratio into the second extrusion port of the 3D printer, the 3D printer is provided with a first extrusion port for adding printed concrete and a second extrusion port for adding the first temperature-sensitive material layer, the 3D printer is provided with a first nozzle for extruding the material added in the first extrusion port and a second nozzle for extruding the material added in the second extrusion port, and the 3D printer is also provided with a temperature regulating rod for controlling the temperature; When printing the concrete printing track, the first nozzle on the 3D printer is controlled to print according to the concrete printing track, and the temperature regulating rod controls the temperature of the temperature-sensitive component on the concrete printing track according to the temperature control instruction; When printing the printing track of the temperature-sensitive material layer, the second nozzle on the 3D printer is controlled to print according to the printing track of the temperature-sensitive material layer, and the temperature regulating rod controls the temperature of the temperature-sensitive material on the printing track of the temperature-sensitive material layer according to the temperature control instruction; When the quantity corresponding to the type of temperature-sensitive material is 1, the temperature-sensitive component and cement corresponding to the type of temperature-sensitive material are added into the first extrusion port of the 3D printer according to the material mixing ratio, and the temperature-sensitive material corresponding to the type of temperature-sensitive material is added into the second extrusion port of the 3D printer; When printing the concrete printing track, the first nozzle on the 3D printer is controlled to print according to the concrete printing track, and the temperature regulating rod controls the temperature of the temperature-sensitive component on the concrete printing track according to the temperature control instruction; When printing the printing track of the temperature-sensitive material layer, the second nozzle on the 3D printer is controlled to print according to the printing track of the temperature-sensitive material layer, and the temperature regulating rod controls the temperature of the temperature-sensitive material on the printing track of the temperature-sensitive material layer according to the temperature control instruction; When there is no temperature-sensitive material layer, controlling the first extrusion port of the 3D printer to add a temperature-sensitive component and cement corresponding to the type of the temperature-sensitive material according to the material mixing ratio; The first nozzle on the 3D printer is controlled to print according to the concrete printing track, and the temperature regulating rod controls the temperature of the temperature-sensitive component on the concrete printing track according to the temperature control instruction.

[0019] By adopting the above technical solution, when there is no temperature-sensitive layer, it is directly mixed and then printed. When there is a temperature-sensitive layer, it is divided into two channels. The temperature-sensitive parts and concrete are placed in one channel, and the temperature-sensitive material layer is placed in the other channel. Printing is carried out in sequence and the temperature is controlled. When the temperature-sensitive layer does not exist, there is only one channel. The temperature-sensitive parts and concrete are directly placed in one of the channels, and printing is carried out through a 3D printer, which improves the efficiency of concrete 3D printing.

[0020] Optionally, when there is a temperature-sensitive material layer and the number corresponding to the type of temperature-sensitive material is 1, the method of controlling the first extrusion port of the 3D printer to add a temperature-sensitive component and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio, and adding the temperature-sensitive material corresponding to the type of temperature-sensitive material to the second extrusion port of the 3D printer includes: Determine whether there are temperature-sensitive parts; When the temperature-sensitive component exists, the temperature-sensitive component and cement corresponding to the type of the temperature-sensitive material are added to the first extrusion port of the 3D printer according to the material mixing ratio, and the temperature-sensitive material corresponding to the type of the temperature-sensitive material is added to the second extrusion port of the 3D printer; When printing the concrete printing track, the first nozzle on the 3D printer is controlled to print according to the concrete printing track, and the temperature regulating rod controls the temperature of the temperature-sensitive component on the concrete printing track according to the temperature control instruction; When printing the printing track of the temperature-sensitive material layer, the second nozzle on the 3D printer is controlled to print according to the printing track of the temperature-sensitive material layer, and the temperature regulating rod controls the temperature of the temperature-sensitive material on the printing track of the temperature-sensitive material layer according to the temperature control instruction; When the temperature-sensitive component is not present, cement is added into the first extrusion port of the 3D printer, and a temperature-sensitive material corresponding to the type of the temperature-sensitive material is added into the second extrusion port of the 3D printer according to the mixing ratio of the second material; When printing the concrete printing track, controlling the first nozzle on the 3D printer to print according to the concrete printing track; When printing the temperature-sensitive material layer printing track, the second nozzle on the 3D printer is controlled to print according to the temperature-sensitive material layer printing track, and the temperature regulating rod controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction.

[0021] Optionally, the method of controlling the first nozzle on the 3D printer to print according to the concrete printing trajectory when the temperature-sensitive component is not present includes: Determine the optimal initial temperature based on the type of temperature-sensitive material; Based on the optimal initial temperature and concrete printing trajectory, the corresponding temperature control scheme is found from the preset temperature control database; While controlling the first nozzle on the 3D printer to print according to the concrete printing track, the temperature regulating rod controls the temperature of the concrete on the printing track of the temperature-sensitive material layer according to the temperature control scheme.

[0022] By adopting the above technical solution, when there is no temperature-sensitive material in the concrete, but only cement, and there is a temperature-sensitive material layer on the top of the concrete layer, the temperature can be pre-controlled in advance so that the temperature is appropriate when the temperature-sensitive material layer is added, thereby improving the efficiency of printing the temperature-sensitive material layer.

[0023] Optionally, the method of controlling the first extrusion port of the 3D printer to add the temperature-sensitive material and cement corresponding to the first temperature-sensitive material type according to the first material mixing ratio and then printing includes: Conduct simulation tests on the temperature-sensitive material and cement in the first extrusion port to obtain a predicted state; Based on the printing demand, the corresponding demand status is found from the preset status database; Printing is performed when the forecast status and demand status are the same; When the forecast state and the demand state are different, determining the positive and negative value of the state based on the forecast state and the demand state; Determine the content to be added based on the positive and negative values ​​of the state, wherein the content to be added is a temperature-sensitive material or cement; The first extrusion port of the 3D printer is controlled to add the mixed content according to the preset adjustment amount and then continue testing until the predicted state and the required state are the same, and when the predicted state and the required state are the same, the actual material mixing ratio is determined based on all the adjustment amounts to update the response database.

[0024] By adopting the above technical solution and using simulation software, the temperature changes under different printing process parameters and temperature-sensitive material characteristics are simulated, the molding quality and performance of concrete are predicted, and the performance stability of concrete molding is improved.

[0025] In summary, the present application includes at least the following beneficial technical effects: 1. By controlling the temperature of concrete to adjust the physical properties of concrete, the rapid hardening, continuous printing, strength improvement and functional diversification of concrete can be achieved, thereby improving the structural strength and stability of concrete; 2. Detect environmental changes to determine the response state of temperature-sensitive material aggregates. The temperature of the temperature regulating rod needs to be adjusted to compensate for the effect of humidity on temperature-sensitive materials and ensure that the density and pore quantity inside the concrete are controlled within a reasonable range; 3. By pre-controlling the temperature in advance, the temperature is appropriate when adding the temperature-sensitive material layer, which improves the efficiency of printing the temperature-sensitive material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a temperature-sensitive concrete slurry in Example 1 of the present application.

[0027] Figure 2 It is a structural schematic diagram of a temperature-sensitive concrete slurry in Example 2 of the present application.

[0028] Figure 3 It is a structural schematic diagram of a temperature-sensitive concrete slurry in Example 3 of the present application.

[0029] Figure 4 It is a structural schematic diagram of a temperature-sensitive concrete slurry in Example 4 of the present application.

[0030] Figure 5 This is a flow chart of a concrete 3D printing temperature-controlled molding construction method in Example 5 of the present application.

[0031] Figure 6 It is a flow chart of a specific method for forming a temperature-sensitive concrete slurry and printing it based on the material mixing ratio in Example 5 of the present application.

[0032] Figure 7 It is a schematic diagram of the structure of the 3D printer in Example 5 of the present application.

[0033] Figure 8It is a flowchart of a method in Example 5 of the present application for controlling the first extrusion port of the 3D printer to add temperature-sensitive parts and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio when there is a temperature-sensitive material layer and the quantity corresponding to the type of temperature-sensitive material is 1, and adding the temperature-sensitive material corresponding to the type of temperature-sensitive material into the second extrusion port of the 3D printer.

[0034] Fig. 9 It is a flowchart of a method for controlling the first nozzle on a 3D printer to print according to a concrete printing trajectory when no temperature-sensitive component is present in Example 5 of the present application.

[0035] Fig.10 It is a flowchart of a method for controlling a first extrusion port of a 3D printer in Example 5 of the present application to add a temperature-sensitive material and cement corresponding to a first temperature-sensitive material type according to a first material mixing ratio and then perform printing.

[0036] Explanation of the accompanying drawings: 1. first concrete layer; 2. temperature-sensitive component; 3. first temperature-sensitive material layer; 4. second concrete layer; 5. second temperature-sensitive material layer; 6. first extrusion port; 7. second extrusion port; 8. first nozzle; 9. second nozzle; 10. temperature regulating rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-Figure 10 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] The embodiment of the present application discloses a temperature-sensitive concrete slurry.

[0039] Example 1 Reference Figure 1 A thermosensitive concrete slurry method includes a first concrete layer 1. The number of the first concrete layer 1 is several layers and they are arranged in the form of upper and lower layers. The first concrete layer 1 is mixed with a thermosensitive part 2 made of a thermosensitive material. Here, the thermosensitive part 2 can be made of any material whose structure and form change due to temperature. For example: phase change materials, thermoplastic resins or plastics, cross-linked materials such as hydrogels, liquid metals, etc. Aggregates are made using the thermosensitive part 2. The thermosensitive aggregate responds quickly to temperature changes before cement solidifies, which can provide strength support for the printing process and prevent concrete collapse during the printing process.

[0040] Here, the phase change material is a spherical structure in the figure. Phase change materials will undergo a phase change when a specific phase change temperature is reached, that is, they will convert between solid and liquid. When the phase change material changes from liquid to solid, its own stiffness and mechanical properties will be significantly improved, thereby affecting the stability of the overall structure. Select phase change materials that are liquid at room temperature, such as polyethylene glycol, paraffin, etc. These materials have good phase change properties and heat storage capacity. Selecting a phase change material with a suitable phase change temperature can allow it to absorb ambient heat when the ambient temperature is high during the day; when the ambient temperature drops at night, it releases heat into the room, thereby regulating the indoor temperature.

[0041] Thermoplastic resins will solidify quickly when heated, and the rapid change in structure will increase the strength of the material. During the heating process, the molecular chain activity of the thermoplastic resin intensifies, and a stable cross-linked network structure gradually forms inside the material, which significantly improves its own stiffness and mechanical properties. The rapid solidification of thermoplastic resins optimizes the molding speed of concrete and effectively improves the construction efficiency of 3D printing. It is especially suitable for printing projects with large spans or complex geometric structures, which helps to improve construction efficiency and reduce errors and material waste.

[0042] The hydrogen-bonded hydrogel is a linear structure in the figure. The structure of the hydrogen-bonded hydrogel becomes tighter and more stable at lower temperatures. When the hydrogen-bonded hydrogel is added as a thermosensitive material to concrete 3D printing, the temperature regulating rod 10 passes through the hydrogen-bonded hydrogel in the direction of travel. The decrease in temperature will lead to an increase in the stability of the hydrogen bonds, thereby strengthening the intermolecular forces within the hydrogel. As the hydrogen bonds are strengthened, the distance between the polymer chains is shortened, resulting in a tightening of the grid structure and an increase in density, thereby improving the mechanical properties of the hydrogel, significantly and effectively reducing the voids inside the cement, improving the density of the concrete, and effectively assisting the printing of the cement substrate. The reversible characteristics of the hydrogen-bonded hydrogel also add self-healing capabilities to concrete 3D printing. When the temperature returns to an appropriate range, the hydrogel can absorb a certain amount of water again, thereby restoring some flexibility and providing long-term toughness and fatigue resistance to the concrete.

[0043] Example 2 Reference Figure 2 The difference between this embodiment and embodiment 1 is that there are two types of corresponding temperature-sensitive materials, wherein the phase change material is a spherical structure in the figure, and the hydrogen bond hydrogel is a linear structure in the figure.

[0044] Example 3 Reference Figure 3The difference between this embodiment and embodiment 1 is that there is a first temperature-sensitive material layer 3 between two adjacent first concrete layers 1. Taking thermoplastic resin as an example, during the heating process, the molecular chain activity of the thermoplastic resin intensifies, and a stable cross-linked network structure is gradually formed inside the material, thereby significantly improving its own stiffness and mechanical properties.

[0045] Example 4 Reference Figure 4 A thermosensitive concrete slurry method includes a second concrete layer 4 and a second thermosensitive material layer 5. The second concrete layer 4 is provided in a plurality of layers and is stacked up and down. The second thermosensitive material layer 5 is laid between two adjacent second concrete layers 4.

[0046] Example 5 Based on the same inventive concept, an embodiment of the present invention provides a concrete 3D printing temperature-controlled molding construction method.

[0047] Reference Figure 5 , a concrete 3D printing temperature-controlled molding construction method, comprising: Step 100: Obtain application scenarios and printing requirements.

[0048] The application scenario is the scenario in which the concrete needs to be cured in a certain state, such as the application design scenario of increasing stiffness through the cooling process or the application design scenario of increasing stiffness through the heating process. The printing demand is the demand for the concrete structure, such as rapid prototyping or high requirements for strength and durability. Both are human input methods, or they can be human selection methods based on specific options.

[0049] Step 101: Determine the type of temperature-sensitive material based on the application scenario.

[0050] The type of temperature-sensitive material is the type of temperature-sensitive material. The distinction of types here is mainly about the distinction of temperature control. The determination method can be a database search method, and the database stores the mapping relationship between application scenarios and types of temperature-sensitive materials. It is finally obtained by the staff in this field based on the changes of temperature-sensitive materials discovered in actual research, a lot of experience and experiments. When the system receives the corresponding application scenario, it automatically finds the corresponding type of temperature-sensitive material from the database for output.

[0051] Step 102: Based on the printing requirements and the type of temperature-sensitive material, the corresponding material mixing ratio and temperature control instruction are searched from a preset response database.

[0052] The material incorporation ratio is the ratio of the temperature-sensitive material incorporated into the concrete. By adjusting the amount of the temperature-sensitive material incorporated, the rheological properties of the concrete and the temperature control response capability are controlled, making it printable and controllable. The database stores the mapping relationship between printing requirements, types of temperature-sensitive materials, and material incorporation ratios. The actual situation obtained by the staff in this field after experiments and performance tests based on different types of temperature-sensitive materials and material incorporation ratios is converted into corresponding printing requirements and recorded. When the system receives the corresponding printing requirements and types of temperature-sensitive materials, it automatically searches the database for the corresponding material incorporation ratio for output.

[0053] Step 103: forming a temperature-sensitive concrete slurry based on the material mixing ratio and printing it, and executing a temperature control instruction.

[0054] The temperature control command is a command to control the temperature control adjustment rate. Concrete will be tested here. If the strength and durability of the printed concrete are high enough or it is formed quickly, it means that different temperature adjustment rates are required at this time. If it is a concrete structure that needs to be formed quickly, the faster the temperature change rate, the faster the temperature sensitive materials such as paraffin or hydrogen bond hydrogel can increase their own stiffness or density. If the printed concrete has high requirements for strength and durability, the slower the temperature adjustment rate, the more fully the temperature sensitive materials can be cured, and the performance will be more stable.

[0055] Step 104: Find the corresponding theoretical negative feedback state from a preset feedback database based on the printing requirements and the type of temperature-sensitive material.

[0056] The theoretical negative feedback state is the performance index corresponding to the state of the negative feedback if there is negative feedback in theory. Negative feedback includes the degradation of aggregate performance or failure of temperature control. At this time, the corresponding performance index may be a slowdown in temperature change, an increase in pressure, an increase in humidity, etc. The database stores the mapping relationship between printing requirements, types of temperature-sensitive materials, and theoretical negative feedback states. It is obtained by analyzing the negative feedback states that occur when printing according to the printing requirements in actual experiments by staff in this field. When the system receives the corresponding printing requirements and types of temperature-sensitive materials, it automatically finds the corresponding theoretical negative feedback state from the database and outputs it.

[0057] Step 105: Monitor and obtain the response status during the printing process.

[0058] The response state is the state of the concrete feedback during the printing process. The acquisition method can be a corresponding sensor detection method, such as: a humidity sensor or a temperature sensor.

[0059] Step 106: Output a preset deceleration instruction when the response state is a theoretical negative feedback state.

[0060] The deceleration instruction is an instruction to reduce the temperature control adjustment rate, and is also a type of temperature control instruction. When the response state is the same as the theoretical negative feedback state, it means that a negative feedback state has occurred at this time, and the structural performance is affected. If the temperature drops too low, it may slow down the hydration reaction of the cement, and also prolong the hardening time, which may lead to insufficient early strength. If the temperature rises too high, it may cause thermal stress and cracks. For example: when the data received by the sensor shows that the humidity is too high, high humidity will affect the performance and hardening process of the printed concrete, slow down the hydration reaction of the cement in the concrete, slow down the hardening process, and delay the formation of early strength. The temperature of the temperature adjustment rod 10 needs to be adjusted to compensate for the effect of humidity on the temperature-sensitive material and cement. At this time, the temperature adjustment rate needs to be slowed down.

[0061] Step 107: When the response state is not the theoretical negative feedback state, continue to obtain the response state.

[0062] When the response state is not the theoretical negative feedback state, it indicates that the printing is normal at this time, and the instructions of step 103 are continued to be executed to ensure the smooth progress of the printing process.

[0063] Reference Figure 6 , the specific method of forming a temperature-sensitive concrete paste and printing based on the material mixing ratio includes: Step 200: Obtain a printing drawing, and determine a printing trajectory based on the printing drawing.

[0064] The printed drawings are drawings of the concrete structure that need to be printed.

[0065] The printing track includes the concrete printing track and the temperature-sensitive material layer printing track, which is the travel track of the 3D printer. The method of determination is to read directly, that is, the travel track is described and explained on the printed drawing, and then read and analyze it.

[0066] Step 201: Determine whether there is a temperature-sensitive material layer.

[0067] The purpose of the judgment is to determine whether it is necessary to print the temperature-sensitive material layer. It should be noted that the temperature-sensitive material layer here can be either the first temperature-sensitive material layer 3 or the second temperature-sensitive material layer 5.

[0068] Step 202: When there is a temperature-sensitive material layer, determine whether the quantity corresponding to the temperature-sensitive material type is 1.

[0069] The purpose of the judgment is to determine whether different temperature-sensitive materials are mixed in the corresponding channels, thereby causing different temperature controls.

[0070] Step 203: When the number corresponding to the temperature-sensitive material type is not 1, the temperature-sensitive material type corresponding to the temperature-sensitive component 2 is defined as the first temperature-sensitive material type, the material incorporation ratio corresponding to the first temperature-sensitive material type is defined as the first material incorporation ratio, the temperature-sensitive material type corresponding to the first temperature-sensitive material layer 3 is defined as the second temperature-sensitive material type, and the material incorporation ratio corresponding to the second temperature-sensitive material type is defined as the second material incorporation ratio.

[0071] Step 204: Control the first extrusion port 6 of the 3D printer to add the temperature-sensitive material and cement corresponding to the first temperature-sensitive material type according to the first material mixing ratio, and control the second extrusion port 7 of the 3D printer to add the temperature-sensitive material corresponding to the second temperature-sensitive material type according to the second material mixing ratio.

[0072] like Figure 7 As shown, the 3D printer has a first extrusion port 6 for adding printed concrete and a second extrusion port 7 for adding the first temperature-sensitive material layer 3. The 3D printer has a first nozzle 8 for extruding the material added in the first extrusion port 6 and a second nozzle 9 for extruding the material added in the second extrusion port 7. The first extrusion port 6 is connected to the first nozzle 8, and the second extrusion port 7 is connected to the second nozzle 9. The 3D printer also has a temperature regulating rod 10 for controlling the temperature, so as to control the temperature of the printed concrete or temperature-sensitive material layer.

[0073] Step 205: When printing the concrete printing track, the first nozzle 8 on the 3D printer is controlled to print according to the concrete printing track, and the temperature regulating rod 10 controls the temperature of the temperature sensitive component 2 on the concrete printing track according to the temperature control instruction.

[0074] For concrete structures that require rapid prototyping, a higher temperature change rate can be used to speed up the response of temperature-sensitive material aggregates; for concrete structures with higher requirements for strength and durability, a lower temperature change rate can be used to ensure sufficient curing of the concrete and stable performance.

[0075] Step 206: When printing the temperature-sensitive material layer printing track, control the second nozzle 9 on the 3D printer to print according to the temperature-sensitive material layer printing track, and the temperature regulating rod 10 controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction.

[0076] Step 207: When the quantity corresponding to the type of temperature-sensitive material is 1, the first extrusion port 6 of the 3D printer is controlled to add the temperature-sensitive component 2 and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio, and the second extrusion port 7 of the 3D printer is controlled to add the temperature-sensitive material corresponding to the type of temperature-sensitive material.

[0077] When the number corresponding to the type of temperature-sensitive material is 1, it means that the materials are not differentiated and can all be mixed in. The only difference is that cement needs to be added into the first extrusion port 6.

[0078] Step 208: When printing the concrete printing track, the first nozzle 8 on the 3D printer is controlled to print according to the concrete printing track, and the temperature regulating rod 10 controls the temperature of the temperature sensitive component 2 on the concrete printing track according to the temperature control instruction.

[0079] Step 209: When printing the temperature-sensitive material layer printing track, control the second nozzle 9 on the 3D printer to print according to the temperature-sensitive material layer printing track, and the temperature regulating rod 10 controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction.

[0080] Step 210: When there is no temperature-sensitive material layer, control the first extrusion port 6 of the 3D printer to add the temperature-sensitive component 2 and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio.

[0081] When there is no temperature-sensitive material layer, it means that only the concrete layer needs to be printed, so there is only one material, that is, the temperature-sensitive component 2 mixed with the temperature-sensitive material, and no other material or mixture is needed.

[0082] Step 211: Control the first nozzle 8 on the 3D printer to print according to the concrete printing track, and the temperature regulating rod 10 controls the temperature of the temperature sensitive component 2 on the concrete printing track according to the temperature control instruction.

[0083] It should be noted that if the Figure 1 For the concrete slurry shown in the figure, cement needs to be added into the second extrusion port as well.

[0084] Reference Figure 8 , when there is a temperature-sensitive material layer and the number corresponding to the type of temperature-sensitive material is 1, the method of controlling the first extrusion port 6 of the 3D printer to add the temperature-sensitive component 2 and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio, and adding the temperature-sensitive material corresponding to the type of temperature-sensitive material into the second extrusion port 7 of the 3D printer includes: Step 300: Determine whether a temperature-sensitive component 2 exists.

[0085] This is mainly for the occurrence of Figure 4 Only the encapsulated second temperature-sensitive material layer 5 is shown.

[0086] Step 301: When the temperature-sensitive component 2 exists, the temperature-sensitive component 2 and cement corresponding to the temperature-sensitive material type are added into the first extrusion port 6 of the 3D printer according to the material mixing ratio, and the temperature-sensitive material corresponding to the temperature-sensitive material type is added into the second extrusion port 7 of the 3D printer.

[0087] If there is a temperature sensitive component 2, it means Figure 1 , 2 and 3, then follow steps 207-211, that is, control the first extrusion port 6 of the 3D printer to add the temperature-sensitive component 2 and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio, and add the temperature-sensitive material corresponding to the type of temperature-sensitive material into the second extrusion port 7 of the 3D printer.

[0088] Step 302: When printing the concrete printing track, the first nozzle 8 on the 3D printer is controlled to print according to the concrete printing track, and the temperature regulating rod 10 controls the temperature of the temperature sensitive component 2 on the concrete printing track according to the temperature control instruction.

[0089] Step 303: When printing the temperature-sensitive material layer printing track, control the second nozzle 9 on the 3D printer to print according to the temperature-sensitive material layer printing track, and the temperature adjustment rod 10 controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction.

[0090] Step 304: When the temperature-sensitive component 2 does not exist, cement is added into the first extrusion port 6 of the 3D printer, and the temperature-sensitive material corresponding to the type of the temperature-sensitive material is added into the second extrusion port 7 of the 3D printer according to the second material mixing ratio.

[0091] When the temperature sensitive component 2 does not exist, it indicates that the 3D printed concrete is as follows Figure 4 As shown, only cement needs to be added to the first extrusion port 6 for forming concrete, and only temperature-sensitive material needs to be added to the second extrusion port 7 for forming the temperature-sensitive material layer.

[0092] Step 305: When printing the concrete printing track, control the first nozzle 8 on the 3D printer to print according to the concrete printing track.

[0093] Since only concrete is produced here and there are no temperature-sensitive materials, there is no need for temperature control and the process can proceed normally.

[0094] Step 306: When printing the temperature-sensitive material layer printing track, control the second nozzle 9 on the 3D printer to print according to the temperature-sensitive material layer printing track, and the temperature adjustment rod 10 controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction.

[0095] Reference Fig. 9 The method of controlling the first nozzle 8 on the 3D printer to print according to the concrete printing trajectory when the temperature-sensitive component 2 does not exist includes: Step 400: Determine the optimal initial temperature based on the type of temperature-sensitive material.

[0096] The optimal initial temperature is the optimal temperature at which the temperature-sensitive material is printed on the concrete layer to form the concrete layer. The determination method may be a database search method, that is, the database stores a mapping relationship between the type of temperature-sensitive material and the optimal initial temperature. The optimal initial temperature is obtained by observing and evaluating the corresponding performance and printing conditions of the actual temperature-sensitive material when printed on different concrete layers. When the system receives the corresponding type of temperature-sensitive material, it automatically searches for the corresponding optimal initial temperature from the database and outputs it.

[0097] Step 401: Find a corresponding temperature control solution from a preset temperature control database based on the optimal initial temperature and the concrete printing trajectory.

[0098] The temperature control scheme is a temperature control scheme, that is, a scheme that controls the temperature so that the temperature is at the optimal initial temperature when the concrete returns to the corresponding position after printing according to the concrete printing trajectory. The database stores the mapping relationship between the optimal initial temperature, the concrete printing trajectory, and the temperature control scheme. The staff in this field observes the final temperature and records it according to different concrete printing trajectories and then executes different temperature control schemes.

[0099] Step 402: while controlling the first nozzle 8 on the 3D printer to print according to the concrete printing track, the temperature regulating rod 10 controls the temperature of the concrete on the printing track of the temperature-sensitive material layer according to the temperature control scheme.

[0100] When there is no temperature-sensitive material in the concrete, but only cement, and there is a temperature-sensitive material layer on top of the concrete layer, the temperature can be pre-controlled in advance so that the temperature is appropriate when the temperature-sensitive material layer is added, thereby improving the efficiency of printing the temperature-sensitive material layer.

[0101] It should be noted that the temperature control solution here is also applicable to the 3D printing solution where the number of temperature-sensitive materials is 1.

[0102] Reference Fig.10 , the method for controlling the first extrusion port 6 of the 3D printer to add the temperature-sensitive material and cement corresponding to the first temperature-sensitive material type according to the first material mixing ratio to perform printing comprises: Step 500: Conduct simulation tests on the temperature-sensitive material and cement in the first extrusion port 6 to obtain a predicted state.

[0103] The predicted state is the state of the 3D printed concrete predicted after the corresponding model is established, and is obtained by performing a local test on the concrete material in the first extrusion port 6, that is, a corresponding test area is provided in the corresponding 3D printer.

[0104] Step 501: Based on the printing demand, the corresponding demand status is searched from the preset status database.

[0105] The demand state is the state of the concrete after printing according to the printing demand conditions. The mapping relationship between printing demand and demand state is stored in the database. It is understood and analyzed by the staff in this field according to the actual printing demand. When the system receives the corresponding printing demand, it automatically finds the corresponding demand state from the database and outputs it.

[0106] Step 502: Printing is performed when the forecast status and the demand status are the same.

[0107] If the predicted state and the required state are the same, it means that the mixed concrete meets the requirements, and printing can begin.

[0108] Step 503: When the predicted state and the demand state are different, determine the state positive and negative value based on the predicted state and the demand state.

[0109] The positive and negative values ​​of the state are the difference between the corresponding states. Here, the predicted state and the demand state are quantified and then subtracted.

[0110] Step 504: Determine the mixed content based on the status positive and negative values.

[0111] The admixture is temperature-sensitive material or cement. For example, if it is a negative value, that is, the hardness is low, it means that the admixture is excessive, and more cement is needed.

[0112] Step 505: Control the first extrusion port 6 of the 3D printer to add the mixed content according to the preset adjustment amount and continue testing until the predicted state and the required state are the same, and when the predicted state and the required state are the same, determine the actual material mixing ratio based on all the adjustment amounts to update the response database.

[0113] The adjustment amount is a controllable adjustment amount, that is, adding these amounts will not cause a large change in performance, making the state more unsatisfactory. The first extrusion port 6 of the 3D printer is controlled to add the admixture according to the preset adjustment amount so that the tested concrete changes its rheological properties.

[0114] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A temperature-sensitive concrete slurry, characterized in that: It comprises a first concrete layer (1), wherein a temperature-sensitive component (2) made of a temperature-sensitive material is mixed in the first concrete layer (1).

2. The temperature-sensitive concrete slurry according to claim 1, characterized in that: There are two types of temperature-sensitive materials corresponding to the temperature-sensitive component (2).

3. The temperature-sensitive concrete slurry according to claim 1, characterized in that: It also comprises a first temperature-sensitive material layer (3) made of a temperature-sensitive material, the first concrete layers (1) are provided in a plurality of layers in a stacked manner, and the first temperature-sensitive material layer (3) is provided between two adjacent first concrete layers (1).

4. A temperature-sensitive concrete slurry, characterized in that: It comprises a second concrete layer (4) and a second temperature-sensitive material layer (5), wherein the second concrete layers (4) are provided in a plurality of layers in a stacked manner, and the second temperature-sensitive material layer (5) is provided between two adjacent second concrete layers (4).

5. A concrete 3D printing temperature-controlled molding construction method, applied to a temperature-sensitive concrete slurry as described in any one of claims 1 to 3 or to a temperature-sensitive concrete slurry as described in claim 4, characterized in that: include: Obtain application scenarios and printing requirements; Determine the type of temperature-sensitive material based on the application scenario; Based on the printing requirements and the type of temperature-sensitive materials, the corresponding material mixing ratio is found from the preset response database; A temperature-sensitive concrete slurry is formed and printed based on the material mixing ratio, and temperature control instructions are executed.

6. A concrete 3D printing temperature-controlled molding construction method according to claim 5, characterized in that: Also includes: Based on the printing requirements and the type of temperature-sensitive materials, the corresponding theoretical negative feedback state is found from the preset feedback database; Monitor and obtain response status during printing; When the response state is a theoretical negative feedback state, a preset deceleration instruction is output; When the response state is not a theoretical negative feedback state, the response state continues to be acquired.

7. A concrete 3D printing temperature-controlled molding construction method according to claim 5, characterized in that: The specific method of forming a temperature-sensitive concrete paste and printing based on the material mixing ratio includes: Acquire a printing drawing, and determine a printing trajectory based on the printing drawing, wherein the printing trajectory includes a concrete printing trajectory and a temperature-sensitive material layer printing trajectory; Determine whether there is a temperature-sensitive material layer; When there is a temperature-sensitive material layer, determining whether the quantity corresponding to the type of temperature-sensitive material is 1; When the number corresponding to the type of temperature-sensitive material is not 1, the type of temperature-sensitive material corresponding to the temperature-sensitive element (2) is defined as a first type of temperature-sensitive material, the material incorporation ratio corresponding to the first type of temperature-sensitive material is defined as a first material incorporation ratio, the type of temperature-sensitive material corresponding to the first temperature-sensitive material layer (3) is defined as a second type of temperature-sensitive material, and the material incorporation ratio corresponding to the second type of temperature-sensitive material is defined as a second material incorporation ratio; Controlling the first extrusion port (6) of the 3D printer to add a temperature-sensitive material and cement corresponding to the first temperature-sensitive material type according to the first material mixing ratio, and controlling the second extrusion port (7) of the 3D printer to add a temperature-sensitive material corresponding to the second temperature-sensitive material type according to the second material mixing ratio, the 3D printer being provided with a first extrusion port (6) for adding printed concrete and a second extrusion port (7) for adding the first temperature-sensitive material layer (3), the 3D printer being provided with a first nozzle (8) for extruding the material added to the first extrusion port (6) and a second nozzle (9) for extruding the material added to the second extrusion port (7), and the 3D printer being further provided with a temperature regulating rod (10) for controlling the temperature; When printing a concrete printing track, controlling the first nozzle (8) on the 3D printer to print according to the concrete printing track, and the temperature regulating rod (10) to control the temperature of the temperature sensitive component (2) on the concrete printing track according to the temperature control instruction; When printing the temperature-sensitive material layer printing track, controlling the second nozzle (9) on the 3D printer to print according to the temperature-sensitive material layer printing track, and the temperature adjustment rod (10) controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction; When the quantity corresponding to the type of temperature-sensitive material is 1, the first extrusion port (6) of the 3D printer is controlled to add the temperature-sensitive component (2) and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio, and the second extrusion port (7) of the 3D printer is controlled to add the temperature-sensitive material corresponding to the type of temperature-sensitive material; When printing a concrete printing track, controlling the first nozzle (8) on the 3D printer to print according to the concrete printing track, and the temperature regulating rod (10) to control the temperature of the temperature sensitive component (2) on the concrete printing track according to the temperature control instruction; When printing the temperature-sensitive material layer printing track, controlling the second nozzle (9) on the 3D printer to print according to the temperature-sensitive material layer printing track, and the temperature adjustment rod (10) controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction; When no temperature-sensitive material layer exists, controlling the first extrusion port (6) of the 3D printer to add a temperature-sensitive component (2) and cement corresponding to the type of temperature-sensitive material according to the material mixing ratio; The first nozzle (8) on the 3D printer is controlled to print according to a concrete printing track, and the temperature regulating rod (10) controls the temperature of the temperature sensitive component (2) on the concrete printing track according to a temperature control instruction.

8. A concrete 3D printing temperature-controlled molding construction method according to claim 7, characterized in that: When a temperature-sensitive material layer exists and the quantity corresponding to the type of temperature-sensitive material is 1, a method for controlling a first extrusion port (6) of a 3D printer to add a temperature-sensitive component (2) and cement corresponding to the type of temperature-sensitive material according to a material mixing ratio, and adding a temperature-sensitive material corresponding to the type of temperature-sensitive material into a second extrusion port (7) of the 3D printer comprises: Determine whether there is a temperature-sensitive component (2); When the temperature-sensitive component (2) is present, the temperature-sensitive component (2) and cement corresponding to the type of temperature-sensitive material are added to the first extrusion port (6) of the 3D printer according to the material mixing ratio, and the temperature-sensitive material corresponding to the type of temperature-sensitive material is added to the second extrusion port (7) of the 3D printer; When printing a concrete printing track, controlling the first nozzle (8) on the 3D printer to print according to the concrete printing track, and the temperature regulating rod (10) to control the temperature of the temperature sensitive component (2) on the concrete printing track according to the temperature control instruction; When printing the temperature-sensitive material layer printing track, controlling the second nozzle (9) on the 3D printer to print according to the temperature-sensitive material layer printing track, and the temperature adjustment rod (10) controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction; When the temperature-sensitive component (2) is not present, cement is added into the first extrusion port (6) of the 3D printer, and a temperature-sensitive material corresponding to the type of the temperature-sensitive material is added into the second extrusion port (7) of the 3D printer according to the mixing ratio of the second material; When printing a concrete printing track, controlling a first nozzle (8) on the 3D printer to print along the concrete printing track; When printing the temperature-sensitive material layer printing track, the second nozzle (9) on the 3D printer is controlled to print according to the temperature-sensitive material layer printing track, and the temperature adjustment rod (10) controls the temperature of the temperature-sensitive material on the temperature-sensitive material layer printing track according to the temperature control instruction.

9. A concrete 3D printing temperature-controlled molding construction method according to claim 8, characterized in that: The method of controlling a first nozzle (8) on a 3D printer to print according to a concrete printing trajectory when a temperature-sensitive component (2) is not present comprises: Determine the optimal initial temperature based on the type of temperature-sensitive material; Based on the optimal initial temperature and concrete printing trajectory, the corresponding temperature control scheme is found from the preset temperature control database; While controlling the first nozzle (8) on the 3D printer to print along the concrete printing track, the temperature regulating rod (10) controls the temperature of the concrete on the printing track of the temperature-sensitive material layer according to the temperature control scheme.

10. A concrete 3D printing temperature-controlled molding construction method according to claim 7, characterized in that: The method for controlling the first extrusion port (6) of the 3D printer to add a temperature-sensitive material and cement corresponding to a first temperature-sensitive material type according to a first material mixing ratio and then printing comprises: Conducting simulation tests on the temperature-sensitive material and cement in the first extrusion port (6) to obtain a predicted state; Based on the printing demand, the corresponding demand status is found from the preset status database; Printing is performed when the forecast status and demand status are the same; When the forecast state and the demand state are different, determining the positive and negative value of the state based on the forecast state and the demand state; Determine the content to be added based on the positive and negative values ​​of the state, wherein the content to be added is a temperature-sensitive material or cement; The first extrusion port (6) of the 3D printer is controlled to add the mixed content according to the preset adjustment amount and then continue testing until the predicted state and the required state are the same, and when the predicted state and the required state are the same, the actual material mixing ratio is determined based on all the adjustment amounts to update the response database.

Images