A method, system, equipment and medium for quality control of 3D printed concrete

Abstract

This invention discloses a method for controlling the quality of 3D printed concrete, comprising the following steps: S1. Obtaining multiple identical 3D printed concrete samples with the same component ratios, and flattening them to form cubic specimens; S2. Obtaining the concrete setting time; S3. Conducting a watermark height test on the set concrete; S4. Conducting an erosion resistance test on the set concrete to obtain the concrete mass change and volume change; S5. Conducting a compressive strength test on the set concrete to obtain the time of crack appearance and the time of pulverization; S6. Changing the proportions of the various components of the concrete, repeating multiple sets of experiments, and obtaining multiple sets of test values; S7. Calculating the average value of the values ​​obtained from multiple sets of experiments; S8. Comparing the different test values ​​of different components with the average value to obtain the most suitable concrete. This invention ensures the stability of the concrete performance required for 3D printing and avoids problems such as cracks and water seepage caused by improper mix proportions.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a method, equipment, and storage medium for controlling the quality of 3D printed concrete. Background Technology

[0002] 3D printing, also known as additive manufacturing technology, is a technology that manufactures solid parts by adding materials layer by layer based on three-dimensional CAD data. Concrete generally refers to cement concrete, which is made by mixing cement as a binder, sand and stone as aggregates, and water (which may contain admixtures and additives) in a certain proportion. It is widely used in civil engineering.

[0003] 3D printed concrete is an emerging construction technology that combines 3D printing technology with concrete material technology. It achieves the construction of complex building structures without formwork by precisely layering and stacking materials.

[0004] In the traditional 3D printing concrete mixing process, due to the lack of precise control methods and data support, it is often difficult to achieve precise control and optimization of the raw material mix ratio. This leads to the instability of 3D printed concrete quality, increases the safety risks and maintenance costs of buildings, and the traditional mixing method is also prone to waste of raw materials, which is not conducive to the effective use of resources and environmental protection.

[0005] Therefore, this application proposes a method for quality control of 3D printed concrete to solve the above-mentioned technical problems. Summary of the Invention

[0006] The main objective of this invention is to provide a method for controlling the quality of 3D printed concrete, so as to solve the technical problems mentioned in the background art.

[0007] The present invention solves the above-mentioned technical problems by adopting the following technical solutions:

[0008] A method for controlling the quality of 3D printed concrete includes the following specific steps:

[0009] S1. Obtain the ratio between multiple 3D printed concrete samples to be tested and the components of the 3D printed concrete, and flatten the 3D printed concrete samples to be tested to form multiple cubic specimens with a side length of 150mm.

[0010] S2. Obtain the setting time of the concrete to be tested in the 3D printing process. ;

[0011] S3. A penetration test was performed on one of the solidified 3D-printed concrete samples to obtain the watermark height. ;

[0012] S4. Conduct an erosion resistance test on another solidified 3D-printed concrete to obtain the concrete mass change. and volume transformation amount ;

[0013] S5. Compressive strength tests were conducted on multiple solidified 3D-printed concrete samples to determine the time it took for cracks to appear in the 3D-printed concrete. and grinding time ;

[0014] S6. By changing the ratio between the 3D-printed concrete to be tested and the various components of the 3D-printed concrete, repeat the above steps to conduct multiple sets of experiments, and obtain the concrete setting time for each set of experiments. Watermark height Concrete mass change Volume transformation amount and grinding time ;

[0015] S7. Concrete setting time obtained from multiple sets of experiments Watermark height Concrete mass change Volume transformation amount and grinding time Calculations were performed to obtain multiple average values. , , , and Specifically, it includes:

[0016] Setting times of multiple concrete groups Watermark height Concrete mass change Volume transformation amount and grinding time Each constitutes a bar chart;

[0017] Let the horizontal axis of the bar chart be the [missing information]. In this experiment, the vertical axis represents the obtained physical quantity, and multiple average values ​​are obtained using the average value formula. , , , and : , , , , ;

[0018] S8. Setting time of concrete with different compositions Watermark height Concrete mass change Volume transformation amount and grinding time Comparing with multiple average values ​​respectively , , , and For comparison, preset concrete setting time Watermark height Concrete mass change Volume transformation amount and grinding time weight parameters , , , , Calculate the deviation value of the total proportion of concrete with different components. ,have:

[0019]

[0020] Select The concrete with the lowest value is considered the most suitable concrete.

[0021] Preferably, the specific operation process of step S3 includes:

[0022] S31. Thoroughly remove the cement paste film from both ends of the 3D-printed concrete surface;

[0023] After the concrete surface of the S32 3D printed is dried, the sealant is evenly applied to the side of the 3D printed concrete, and the thickness of the sealant is 1mm to 2mm.

[0024] S33. Use a screw press to press the 3D printed concrete into the preheated mold to ensure a good seal between the 3D printed concrete and the sealing material, with no leakage.

[0025] S34. Place the 3D-printed concrete into a concrete permeability tester, and apply constant water pressure to the 3D-printed concrete.

[0026] S35. When water seepage appears on the end face of the 3D printed concrete, the concrete seepage tester stops working. Then, the 3D printed concrete is removed and cut, and water marks are drawn with ink as the outline of the seepage.

[0027] S36. Randomly mark 10 test points on the watermark and measure the height of each of the 10 test points to obtain the watermark height. ~ ;

[0028] S37. Calculate the watermark height using the average value formula. :

[0029]

[0030] in, yes The heights of the watermarks were added together after each measurement.

[0031] Preferably, the specific operation process of step S4 includes:

[0032] S41. Measure the weight and volume of the 3D-printed concrete to obtain the initial weight and volume of the 3D-printed concrete.

[0033] S42. Soak the 3D-printed concrete in a sulfate solution of a specified concentration for one day. After soaking, perform wet-dry exchange on the 3D-printed concrete.

[0034] S43 Repeat steps S41 to S42 above until 10 times;

[0035] S44. The impregnated 3D-printed concrete is removed, cleaned, dried, and weighed to obtain the mass of the 3D-printed concrete after the change. ;

[0036] S45. Place the weighed 3D-printed concrete into a tank filled with pure water, obtain the mass of the water overflowing from the tank, and calculate the volume of the 3D-printed concrete after the change using the liquid volume calculation formula. ;

[0037] S46. The quality of the 3D-printed concrete after the change will be obtained. The difference between the initial 3D printed concrete weight and the original weight is calculated to obtain the concrete mass change. The concrete mass change amount The formula for calculating the difference is:

[0038]

[0039] in, That is the initial weight of the 3D-printed concrete. It is the quality of the 3D-printed concrete after the change. It is the mass transformation of concrete in 3D printing;

[0040] S47. 3D printed concrete volume The volume change is obtained by calculating the difference between the volume of the 3D-printed concrete and the volume of the 3D-printed concrete. The formula for calculating the liquid volume is:

[0041]

[0042] in, It calculates the volume of the liquid. It is the mass of water overflowing from the tank. The density of pure water;

[0043] The liquid volume change The formula for calculating the difference is:

[0044]

[0045] in, This is the initial 3D printed concrete volume. It is the volume of the 3D-printed concrete after the change. It refers to the volume change of concrete in 3D printing.

[0046] Preferably, the specific operation process of step S5 includes:

[0047] S51. Place the 3D-printed concrete on a pressure testing machine, scan the 3D-printed concrete from all angles using a scanner, slowly apply pressure to the 3D-printed concrete using the pressure testing machine, and record the moment when cracks appear in the 3D-printed concrete, thus obtaining the time of crack appearance. ;

[0048] S52. The pressure testing machine continues to apply pressure to the 3D-printed concrete until the 3D-printed concrete completely breaks apart, at which point the scanner stops recording and obtains the crushing time. ;

[0049] S53. The scanner records the process from the appearance of cracks in 3D-printed concrete to its complete breakage. Specific operational steps include:

[0050] S531. The scanner scans and labels planar images of multiple surfaces of 3D-printed concrete. , , and ;

[0051] S532. Construct a matrix using the scanned planar image, with the lower left corner of the planar image as the origin, the x-axis direction along the length of the planar image as the origin, and the y-axis direction along the height of the matrix as the origin, and two pixels that are close to each other have a scale of 1 on the coordinate axis.

[0052] S533. Scan the cracked area of ​​the 3D-printed concrete to obtain the corresponding coordinates of the 3D-printed concrete crack in the xy coordinate system, and simultaneously obtain the depth of the concrete crack. ;

[0053] S534. Depth of concrete cracks After mapping to the corresponding matrix point coordinates, adjacent coordinate points are connected to form a three-dimensional image of the crack.

[0054] A 3D-printed concrete quality control system, used to implement any of the above-described 3D-printed concrete quality control methods, comprising:

[0055] The control module is used for data transmission within the system.

[0056] A timing module is used to record the setting time of 3D-printed concrete;

[0057] The testing module is used to perform penetration tests, erosion tests, and compressive strength tests on concrete.

[0058] Preferably, the testing module internally includes a concrete penetration testing unit, a concrete erosion resistance testing unit, and a concrete compressive strength testing unit, wherein:

[0059] A concrete penetration test unit is used to conduct penetration tests on 3D printed concrete, obtain the internal water seepage profile of the 3D printed concrete, and calculate the water mark height based on the water seepage profile.

[0060] A concrete erosion resistance testing unit is used to test the erosion resistance of 3D printed concrete, measure the 3D printed concrete after the test, and obtain the concrete mass change and volume change.

[0061] A concrete compressive strength testing unit is used to test the compressive strength of 3D-printed concrete and obtain the time when cracks appear and the time when the 3D-printed concrete crumbles.

[0062] Preferably, the 3D printed concrete quality control system further includes:

[0063] The image acquisition module is used to acquire images of 3D printed concrete and obtain real-time data on surface cracks and real-time crack depth of the 3D printed concrete.

[0064] A data storage module is used to store the watermark height, concrete mass change, volume change, and crushing time obtained from the test.

[0065] The data analysis module analyzes the setting time, watermark height, concrete mass change, volume change, and crushing time of the concrete to be managed, and obtains the optimal comprehensive value to obtain the optimal concrete mix ratio for 3D printing.

[0066] In another aspect, the present invention also discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the method described above.

[0067] In another aspect, the present invention also discloses a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the method described above.

[0068] As can be seen from the above technical solution, the present invention provides a method for controlling the quality of 3D printed concrete. Compared with the prior art, the present invention has the following advantages:

[0069] 1. This invention obtains multiple sets of experimental data by testing multiple groups of concrete with the same composition but different proportions. Based on the experimental data, the optimal proportions of each component in the concrete are determined, ensuring the stability of the concrete performance required for 3D printing. This greatly improves the safety and durability of buildings, avoids problems such as cracks and water seepage caused by improper mix proportions, and extends the service life of buildings.

[0070] 2. This invention, by scanning and marking the surface of 3D printed concrete, can comprehensively record the surface condition, accurately capture the location and shape of cracks, and obtain the coordinates and depth information of crack areas by scanning crack areas. It can record the three-dimensional features of cracks in detail, comprehensively assess the severity of cracks, and provide a reliable basis for structural safety assessment. At this time, the scanned images are used to construct a matrix and establish an xy coordinate system. By mapping the crack depth to the coordinates of matrix points and connecting them to form a three-dimensional image of cracks, the three-dimensional morphology of cracks can be intuitively displayed, and the distribution of cracks can be understood and analyzed more accurately. Ultimately, this facilitates crack repair and structural analysis.

[0071] It should be understood that the descriptions in this section are not intended to identify key or essential features of embodiments of the invention, nor are they intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Of course, implementing any product of the invention does not necessarily require achieving all of the advantages described above simultaneously. Attached Figure Description

[0072] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0073] Figure 1 This is a schematic diagram of the overall process of the method of the present invention;

[0074] Figure 2This is a schematic diagram of the concrete penetration test process of the present invention;

[0075] Figure 3 This is a schematic diagram of the concrete erosion resistance test process of the present invention;

[0076] Figure 4 This is a schematic diagram of the concrete compressive strength test process of the present invention;

[0077] Figure 5 This is a flowchart illustrating the scanning steps in the concrete compressive strength test of this invention.

[0078] Figure 6 This is a schematic diagram of the process for obtaining the average value of multiple physical quantities according to the present invention;

[0079] Figure 7 This is a flowchart illustrating the comprehensive comparison of the present invention;

[0080] Figure 8 This is a structural framework diagram of the system of the present invention. Detailed Implementation

[0081] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0082] For details in the embodiments, please refer to Figures 1 to 8 .

[0083] like Figure 1 As shown in the embodiments of the present invention, a method for controlling the quality of 3D printed concrete includes the following specific operation steps:

[0084] S1. Obtain the proportions of various components of multiple 3D-printed concrete samples to be tested, and flatten the 3D-printed concrete samples to be tested to form multiple cubic specimens with a side length of 150mm. At this time, obtaining multiple identical 3D-printed concrete samples to be tested and forming standard-sized cubic specimens can ensure the consistency and comparability of test results, thereby achieving the effect of accurately evaluating the performance of 3D-printed concrete under different formulations, and finally providing a reliable comparison basis for subsequent experiments.

[0085] S2. Obtain the setting time of the concrete to be tested in the 3D printing process. ;

[0086] At this time, obtaining the setting time of the 3D printed concrete to be tested can play a role in monitoring the material curing rate, thereby optimizing the construction process and improving work efficiency.

[0087] S3. A penetration test was performed on one of the solidified 3D-printed concrete samples to obtain the watermark height. This can serve to evaluate the waterproof performance of materials, such as Figure 2 As shown, the specific operation process includes:

[0088] S31. Use tools to clean the surface of the 3D-printed concrete, and thoroughly remove the cement paste film from both ends;

[0089] S32. After the cleaned 3D printed concrete has dried, apply the sealant evenly to the side of the 3D printed concrete, and the thickness of the sealant should be about 1mm to 2mm.

[0090] S33. Use a screw press to press the 3D printed concrete into the preheated mold to ensure a good seal between the 3D printed concrete and the sealing material, with no leakage.

[0091] S34. Place the 3D-printed concrete into a concrete permeability tester, and apply constant water pressure to the 3D-printed concrete.

[0092] S35. When water seepage appears on the end face of the 3D printed concrete, the concrete seepage tester stops working. Then, the 3D printed concrete is removed and cut, and water marks are drawn with ink as the outline of the seepage.

[0093] S36. Randomly mark 10 test points on the watermark and measure the height of each of the 10 test points to obtain the watermark height. ~ ;

[0094] S37. Calculate the watermark height using the average value formula. :

[0095]

[0096] in, yes The heights of the watermarks were added together after each measurement.

[0097] It should be noted that 3D-printed concrete with the same composition but different proportions will have different impermeability. During the test, the concrete impermeability tester slowly applies water pressure to the 3D-printed concrete until the water flows through the other side of the 3D-printed concrete. The formation of the water seepage profile inside the 3D-printed concrete and the measurement of the water mark height directly reflect the distribution of pores and cracks inside the 3D-printed concrete, thereby indirectly evaluating the density and impermeability of the 3D-printed concrete.

[0098] S4. Conduct an erosion resistance test on another solidified 3D-printed concrete to obtain the concrete mass change. and volume transformation amount This can serve to assess the material's ability to resist environmental damage, such as... Figure 3 As shown, the specific operation process includes:

[0099] S41. Measure the weight and volume of the 3D-printed concrete to obtain the initial weight and volume of the 3D-printed concrete.

[0100] S42. Soak the 3D-printed concrete in a sulfate solution of a specified concentration for one day. After soaking, perform wet-dry exchange on the 3D-printed concrete.

[0101] S43 Repeat steps S41 to S42 above until 10 times;

[0102] S44. The impregnated 3D-printed concrete is removed, cleaned, dried, and weighed to obtain the mass of the 3D-printed concrete after the change. ;

[0103] S45. Place the weighed 3D-printed concrete into a tank filled with pure water, obtain the mass of the water overflowing from the tank, and calculate the volume of the 3D-printed concrete after the change using the liquid volume calculation formula. ;

[0104] S46. The quality of the 3D-printed concrete after the change will be obtained. The difference between the initial 3D printed concrete weight and the original weight is calculated to obtain the concrete mass change. Concrete mass change The formula for calculating the difference is:

[0105]

[0106] in, That is the initial weight of the 3D-printed concrete. It is the quality of the 3D-printed concrete after the change. It is the mass transformation of concrete in 3D printing;

[0107] S47. 3D printed concrete volume The volume change is obtained by calculating the difference between the volume of the 3D-printed concrete and the volume of the 3D-printed concrete. The formula for calculating liquid volume is:

[0108]

[0109] in, It calculates the volume of the liquid. It is the mass of water overflowing from the tank. The density of pure water;

[0110] Liquid volume change The formula for calculating the difference is:

[0111]

[0112] in, This is the initial 3D printed concrete volume. It is the volume of the 3D-printed concrete after the change. It refers to the volume transformation of concrete in 3D printing;

[0113] It should be noted that 3D-printed concrete with the same composition but different proportions has different degrees of erosion resistance. The prepared sulfate solution is 75mm deep, with 10 cycles and a soaking time of one day. This setting can fully reflect the durability of 3D-printed concrete in acid and alkaline environments. Through erosion resistance testing, the accuracy of test results is ensured while improving test efficiency. This allows for accurate evaluation of the material's corrosion resistance in specific environments, ensuring that the material will not fail due to corrosion in practical applications, thereby improving the overall performance and safety of the product.

[0114] S5. Compressive strength tests were conducted on multiple solidified 3D-printed concrete samples to determine the time it took for cracks to appear in the 3D-printed concrete. and grinding time ,like Figure 4 As shown, the specific operation process includes:

[0115] S51. Place the 3D-printed concrete on a pressure testing machine, scan the 3D-printed concrete from all angles using a scanner, slowly apply pressure to the 3D-printed concrete using the pressure testing machine, and record the moment when cracks appear in the 3D-printed concrete, thus obtaining the time of crack appearance. ;

[0116] S52. The pressure testing machine continues to apply pressure to the 3D-printed concrete until the 3D-printed concrete completely breaks apart, at which point the scanner stops recording and obtains the crushing time. ;

[0117] S53. The scanner records the process from the appearance of cracks in 3D-printed concrete to the complete breakage of the 3D-printed concrete.

[0118] It should be noted that 3D-printed concrete with the same composition but different proportions will have different compressive strengths. The compressive strength test is an important indicator to evaluate the maximum pressure that a material or structure can withstand without failure when subjected to compressive force. The press slowly increases the pressure on the 3D-printed concrete from zero, while the scanner scans the 3D-printed concrete in real time. When cracks appear in the 3D-printed concrete, the scanner records the time when the cracks appear and stores the shape of the 3D-printed concrete at that moment. Subsequently, the scanner stores every change in the 3D-printed concrete until the 3D-printed concrete is crushed.

[0119] Furthermore, such as Figure 5 As shown, the specific operation process of step S53 includes:

[0120] S531. The scanner scans and labels planar images of multiple surfaces of 3D-printed concrete. , , and At this point, by scanning and marking multiple surfaces of the 3D printed concrete, the surface condition of the concrete can be fully recorded, thereby accurately capturing the location and shape of cracks and providing a detailed data basis for subsequent analysis.

[0121] S532. Construct a matrix using the scanned planar image, with the lower left corner of the planar image as the origin, the x-axis direction along the length of the planar image as the origin, and the y-axis direction along the height of the matrix as the origin, and two pixels that are close to each other have a scale of 1 on the coordinate axis.

[0122] S533. Scan the cracked area of ​​the 3D-printed concrete to obtain the corresponding coordinates of the 3D-printed concrete crack in the xy coordinate system, and simultaneously obtain the depth of the concrete crack. ;

[0123] S534. Depth of concrete cracks After mapping to the corresponding matrix point coordinates, the two adjacent coordinate points are connected to form a three-dimensional image of the crack. At this time, the crack depth is mapped to the corresponding matrix point coordinates, and the adjacent coordinate points are connected to form a three-dimensional image of the crack. This can intuitively show the three-dimensional morphology of the crack, thereby achieving a more accurate understanding and analysis of the crack distribution.

[0124] In summary, the multiple matrices obtained from the scanning of the 3D-printed concrete side surface enable subsequent processing to accurately determine the precise coordinates of each point within the 3D-printed concrete surface. Precise coordinate information helps maintain image consistency and continuity during the scanning process. Simultaneously, depth information is acquired at each point during scanning. By combining the two-dimensional image and depth information, cracks can be identified and located more accurately, avoiding missed or false detections. Furthermore, the resulting three-dimensional image provides a comprehensive view of the cracks, helping analysts gain a more complete understanding of the crack situation and make more accurate assessments and decisions. Additionally, staff can analyze the three-dimensional image to obtain the crack resistance performance of the 3D-printed concrete.

[0125] S6. By changing the ratio between the 3D-printed concrete to be tested and the various components of the 3D-printed concrete, repeat the above steps to conduct multiple sets of experiments, and obtain the concrete setting time for each set of experiments. Watermark height Concrete mass change Volume transformation amount and grinding time ;

[0126] S7. Concrete setting time obtained from multiple sets of experiments Watermark height Concrete mass change Volume transformation amount and grinding time Calculations were performed to obtain multiple average values. , , , and ,like Figure 6 As shown, the specific operation process includes:

[0127] Setting times of multiple concrete groups Watermark height Concrete mass change Volume transformation amount and grinding time Each constitutes a bar chart;

[0128] Let the horizontal axis of the bar chart be the [missing information]. In this experiment, the vertical axis represents the obtained physical quantity, and multiple average values ​​are obtained using the average value formula. , , , and : , , , , ;

[0129] At this point, a bar chart is constructed based on the obtained information. Through the length or height of the bars, the staff can intuitively feel the size and trend of the data, and can easily understand the information represented by the bar chart and quickly obtain the required data. Through the average value of different physical quantities, the different properties of 3D printed concrete can be preliminarily analyzed. At the same time, the average value can serve as the most important reference standard to help determine which formula has better physical properties.

[0130] S8. For example Figure 7 As shown, the setting time of concrete with different compositions is... Watermark height Concrete mass change Volume transformation amount and grinding time Comparing with multiple average values ​​respectively , , , and For comparison, preset concrete setting time Watermark height Concrete mass change Volume transformation amount and grinding time weight parameters , , , , Calculate the deviation value of the total proportion of concrete with different components. ,have:

[0131]

[0132] Select The concrete with the lowest value is the most suitable concrete, which can play a role in systematically improving product quality, thereby achieving the goal of continuously optimizing the production process.

[0133] At this point, the deviation between the physical quantities obtained from each group of tests and the average value can be calculated. Based on the deviation data, it is convenient to make a comprehensive comparison later. When the weight parameter is not considered (the weight parameter is 1), by summing the deviation data, the degree of deviation of each physical quantity can be combined to form a unified evaluation index. The smaller the comprehensive value, the closer the data of this group of experiments is to the average value, that is, the more stable the performance of this group of concrete is and the closer it is to the ideal state.

[0134] In addition, it should be noted that the concrete setting time is also entered here. Watermark height Concrete mass change Volume transformation amount and grinding time Different weighting parameters can be used to quickly filter and obtain concrete data with specific effects (specific characteristics) according to different concrete uses.

[0135] Furthermore, by testing multiple groups of concrete with the same composition but different proportions, multiple sets of experimental data were obtained. Based on the experimental data, the optimal proportions between the components of the concrete were determined, ensuring the stability of the concrete performance required for 3D printing. This greatly improves the safety and durability of the building, avoids problems such as cracks and water seepage caused by improper mix proportions, and extends the service life of the building.

[0136] On the other hand, such as Figure 8 As shown, the present invention also discloses a 3D printed concrete quality control system for implementing the above-mentioned 3D printed concrete quality control method, comprising:

[0137] The control module is used for data transmission within the system.

[0138] A timing module is used to record the setting time of 3D-printed concrete;

[0139] The testing module is used to perform penetration tests, erosion tests, and compressive strength tests on concrete.

[0140] The testing module includes a concrete penetration test unit, a concrete erosion resistance test unit, and a concrete compressive strength test unit, among which:

[0141] The concrete penetration test unit is used to conduct penetration tests on 3D printed concrete, obtain the internal water seepage profile of the 3D printed concrete, and calculate the water mark height based on the water seepage profile.

[0142] The concrete erosion resistance testing unit is used to test the erosion resistance of 3D printed concrete, measure the 3D printed concrete after the test, and obtain the concrete mass change and volume change.

[0143] The concrete compressive strength testing unit is used to test the compressive strength of 3D printed concrete and obtain the time when cracks appear and the time when the 3D printed concrete crumbles.

[0144] The image acquisition module is used to acquire images of 3D printed concrete, and obtain real-time data on surface cracks and crack depths of the 3D printed concrete.

[0145] The data storage module is used to store the watermark height, concrete mass change, volume change, and crushing time obtained from the test.

[0146] The data analysis module analyzes the setting time, watermark height, concrete mass change, volume change, and crushing time of the concrete to be managed, and obtains the optimal comprehensive values ​​to obtain the optimal concrete mix ratio for 3D printing.

[0147] In another aspect, the present invention also discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the steps of the method described above.

[0148] In another aspect, the present invention also discloses a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the method described above.

[0149] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute any of the 3D printed concrete quality control methods described above.

[0150] It is understood that the system provided in the embodiments of the present invention corresponds to the method provided in the embodiments of the present invention, and the explanation, examples and beneficial effects of the relevant content can be referred to the corresponding parts of the above methods.

[0151] This application also provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, communication interface, and memory communicate with each other via the communication bus.

[0152] Memory, used to store computer programs;

[0153] The processor, when executing the program stored in the memory, implements the above-mentioned method for controlling the quality of 3D printed concrete.

[0154] The communication bus mentioned in the aforementioned electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc.

[0155] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0156] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0157] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0158] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0159] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0160] Furthermore, it should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of the present invention, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0161] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, in the embodiments of this invention, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

Claims

1. A method for quality control of 3D printed concrete, characterized in that, The method comprises the following specific operation steps: S1. Obtain the proportions between the 3D-printed concrete to be detected and each component of the 3D-printed concrete, and level the 3D-printed concrete to be detected to form a plurality of cubic test pieces with a side length of 150 mm; S2. Acquiring the setting time of the 3D printed concrete to be detected ; S3. Perform a water penetration test on one of the set 3D printed concretes to obtain the water mark height ; S4. Perform an erosion resistance test on another 3D printed concrete after setting, resulting in a concrete mass change and volume change ; S5. Perform compressive strength tests on the plurality of solidified 3D printed concretes to obtain a time to crack for the 3D printed concretes and a time to crush ; S6. Repeat the above steps for multiple sets of experiments by changing the ratio between the 3D printed concrete to be detected and each component of the 3D printed concrete, respectively obtaining the concrete setting time of the multiple sets of experiments , the water mark height , the concrete mass change amount , the volume change amount , and the crushing time ; S7. Calculate the setting time of the concrete obtained from the multiple sets of experiments , the water mark height , the concrete mass transformation amount , the volume transformation amount , and the crushing time , respectively, to obtain multiple average values , , , , and ; S8. The setting time of the concrete of different ingredients , the water mark height , the concrete mass transformation amount , the volume transformation amount and the crushing time are compared with a plurality of average values , , , and respectively, the weight parameters of the setting time of the concrete , the water mark height , the concrete mass transformation amount , the volume transformation amount and the crushing time , , , , of the different ingredients are calculated, and the total comparison deviation value of the concrete of different ingredients is calculated. Selecting The concrete with the lowest value is selected as the most suitable concrete.

2. The method of claim 1, wherein the 3D-printed concrete quality is controlled by adjusting the amount of the at least one of the following: The specific operation process of the S3 step comprises: ​ S31. Sufficiently remove the cement paste film on the two end surfaces of the 3D-printed concrete; S32. After the 3D-printed concrete surface is dried, the sealing material is evenly applied to the side surface of the 3D-printed concrete, and the thickness of the sealing material is 1 mm to 2 mm; S33. The 3D-printed concrete is pressed into the preheated test mold using a spiral press, so as to ensure that the sealing between the 3D-printed concrete and the sealing material is good and there is no water leakage phenomenon; S34. The 3D-printed concrete is placed in the concrete impermeability instrument, and the concrete impermeability instrument applies constant water pressure to the 3D-printed concrete; S35. When water seeps out of the end surface of the 3D-printed concrete, the concrete impermeability instrument stops working, and then the 3D-printed concrete is taken out and cut, and the water mark is drawn as the water seepage contour using ink; S36. Randomly mark 10 test points on the water mark, and measure the height of the 10 test points to obtain the water mark height ;​ S37. Obtain water mark height using average value formula : wherein is Water mark height is added after the second measurement.

3. The method of claim 1, wherein the 3D printed concrete quality control method is characterized by, The specific operation process of the S4 step comprises: S41. Measure the weight and volume of the 3D-printed concrete to obtain the initial weight and volume of the 3D-printed concrete, respectively; S42. The 3D-printed concrete is immersed in a sulfate salt solution with a specified concentration for one day, and then the 3D-printed concrete is subjected to dry-wet exchange after the immersion is completed; S43. Repeat the above S41-S42 steps until 10 times; S44. The 3D printed concrete after soaking is removed for cleaning and drying, and weighed to obtain the mass of the 3D printed concrete after soaking ; S45. The weighed 3D printed concrete is placed in a tank filled with pure water, the mass of the overflow water is obtained, and the volume of the changed 3D printed concrete is obtained through a liquid volume calculation formula ; S46. Calculate the mass of the 3D printed concrete after the change The difference between the initial 3D printed concrete weight and the mass of the 3D printed concrete after the change is the mass change of the concrete The difference calculation formula of the mass change of the concrete is: ​ wherein, is the initial 3D printed concrete weight, is the changed 3D printed concrete mass, is the 3D printed concrete mass change amount; S47. Calculate the volume of the 3D printed concrete Subtract the volume of the 3D printed concrete from the volume of the 3D printed concrete, to obtain the volume change The liquid volume calculation formula is: wherein, is the volume of liquid calculated, is the mass of water overflowed from the tank, is the density of pure water; The liquid volume change amount The difference calculation formula is: wherein, is the initial 3D printed concrete volume, is the changed 3D printed concrete volume, is the 3D printed concrete volume change amount.

4. The method of claim 1, wherein the 3D printed concrete quality control method is characterized by, The specific operation process of the S5 step comprises: S51. Place the 3D printed concrete on the pressure testing machine, use the scanner to scan the 3D printed concrete in all directions, use the pressure testing machine to slowly apply pressure to the 3D printed concrete, when the 3D printed concrete appears cracks, the scanner records from this moment, and the crack appearance time is obtained ; S52. The compression testing machine continues to apply pressure to the 3D printed concrete until the 3D printed concrete is completely crushed, the scanner stops recording, and the crush time is obtained ; S53. The scanner records the occurrence of cracks in the 3D-printed concrete to the complete crushing of the 3D-printed concrete.

5. The method of claim 4, wherein the 3D printed concrete quality control method is characterized by, The specific operation process of the S53 step comprises: S531. The scanner scans and labels the planar images of the multiple surfaces of the 3D printed concrete as , , and ; S532. A matrix is constructed based on the scanned planar image, the lower left corner of the planar image is taken as the origin, the origin along the length direction of the planar image is taken as the x-axis direction, and the origin along the height direction of the matrix is taken as the y-axis direction to construct an xy coordinate system, and the scales of two pixel points close to each other on the coordinate axes are 1; S533. Scanning the 3D-printed concrete crack region to obtain the corresponding coordinates of the 3D-printed concrete crack in the xy coordinate system, and the depth in the concrete crack is obtained ; S534. mapping the concrete crack depth After mapping to the corresponding matrix point coordinates, connect the adjacent two coordinate points to form a three-dimensional image of the crack.

6. The method of claim 1, wherein the 3D printed concrete quality control method is characterized by, The specific operation process of the S7 step comprises: The multiple sets of concrete setting times , water mark heights , concrete mass transformation amounts , volume transformation amounts , and crushing times are respectively constituted into bar graphs; The horizontal axis of the bar chart is the number of experiments The vertical axis is the physical quantity obtained, and a plurality of average values are obtained using the average value formula 、 、 、 and : 、 、 、 、 , is the average value of the pulverization time.

7. A 3D printed concrete quality regulation system for implementing the 3D printed concrete quality regulation method according to any one of claims 1-6, characterized in that, It comprises: a control module for data transmission in the system; a timing module for recording the setting time of the 3D-printed concrete; a test module for immersion test, erosion test and compressive strength test of the concrete; The test module is internally provided with a concrete immersion test unit, a concrete erosion resistance test unit and a concrete compressive strength test unit, wherein: The concrete immersion test unit is used for immersion experiment of the 3D-printed concrete, and the water seepage contour of the 3D-printed concrete is obtained, and the water mark height is calculated according to the water seepage contour; The concrete erosion resistance test unit is used for erosion resistance test of the 3D-printed concrete, and the 3D-printed concrete after the test is measured to obtain the mass change and volume change of the concrete. The concrete compressive strength test unit is used for testing the compressive strength of 3D printed concrete, obtaining the crack time and crushing time of 3D printed concrete.

8. The 3D-printed concrete quality regulation system of claim 7, wherein, Also includes: An image acquisition module is used for image acquisition of 3D printed concrete, and real-time 3D printed concrete surface crack data and real-time crack depth are obtained. A data storage module is used to store the water mark height, concrete mass change, volume change and crushing time obtained by testing; A data analysis module analyzes the setting time, water mark height, concrete mass change, volume change and crushing time of the concrete to be managed, obtains the best comprehensive value, and obtains the best 3D printed concrete ratio.

9. A computer-readable storage medium, characterized in that, The computer program is stored in the memory and executed by the processor, so that the processor executes the steps of the method according to any one of claims 1 to 6.

10. A computer device, comprising: The memory stores a computer program, and the computer program is executed by the processor, so that the processor executes the steps of the method according to any one of claims 1 to 6.

Images