3D printing concrete quality regulation and control method, system, equipment and medium

Abstract

The invention discloses a 3D printing concrete quality regulation and control method, which comprises the following steps: S1, obtaining a plurality of same to-be-detected 3D printing concrete and component proportions, and flattening to form a cubic test piece; s2, obtaining the setting time of the concrete; s3, carrying out a penetration test on the solidified concrete to obtain the height of a water mark; s4, carrying out anti-erosion test on the solidified concrete to obtain the mass conversion amount and the volume conversion amount of the concrete; s5, testing the compressive strength of the solidified concrete to obtain crack occurrence time and crushing time; s6, changing the proportion of each component of the concrete, and repeating a plurality of groups of experiments to obtain detection values of the plurality of groups of experiments; s7, calculating values obtained by multiple groups of experiments to obtain an average value; and S8, comparing different detection values of different components with the average value to obtain the most suitable concrete. The stability of the performance of the concrete required by 3D printing is ensured, and the problems of cracks, water seepage and the like caused by improper mixing proportion are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a 3D printing concrete quality control method, equipment and storage medium. Background Art

[0002] 3D printing, also known as additive manufacturing technology, is a technology that manufactures solid parts based on three-dimensional CAD data by accumulating materials layer by layer; concrete generally refers to cement as a binder, sand and stone as aggregates, and water (which may contain admixtures and additives) in a certain proportion, which is mixed and obtained by mixing. 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 formwork-free construction of complex building structures through precise layering and stacking of concrete materials.

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

[0005] To this end, this application specifically proposes a 3D printing concrete quality control method to solve the above technical problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a 3D printing concrete quality control method to solve the technical problems raised in the background technology.

[0007] The present invention adopts the following technical solutions to solve the above technical problems:

[0008] A 3D printing concrete quality control method includes the following specific operation steps:

[0009] S1. Obtain the ratio between the components of multiple identical 3D printed concretes to be tested and 3D printed concretes, and level the extracted 3D printed concretes to be tested to form multiple cubic specimens with a side length of 150 mm;

[0010] S2. Obtain the setting time α of the 3D printed concrete to be tested i ;

[0011] S3. Perform a penetration test on one of the solidified 3D printed concrete to obtain the water mark height h i ;

[0012] S4. Perform an anti-corrosion test on another solidified 3D printed concrete to obtain the concrete mass change Δm i and volume change Δv i ;

[0013] S5. Perform compressive strength tests on multiple 3D printed concretes after solidification to obtain the time t when cracks appear in the 3D printed concrete i and crushing time T j ;

[0014] S6. By changing the ratio between the components of the 3D printed concrete to be tested and the 3D printed concrete, repeat the above steps to perform multiple groups of experiments, and obtain the concrete solidification time α of the multiple groups of experiments respectively. i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j ;

[0015] S7. The concrete setting time α obtained from multiple groups of experiments i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j Calculate and obtain multiple average values ​​α k 、h k , Δm k , Δv k and T k , including:

[0016] Multiple groups of concrete setting time α i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j They are respectively formed into bar graphs;

[0017] The horizontal axis of the bar graph is the nth experiment, and the vertical axis is the obtained physical quantity. Use the average value formula to obtain multiple average values ​​α k 、h k , Δm k , Δv k and T k :

[0018] S8. The setting time of concrete with different compositions α i , water mark height h i , Concrete mass change Δmi , volume change Δv i and crushing time T j Respectively with multiple average values ​​α k 、h k , Δm k , Δv k and T k For comparison, the preset concrete setting time α i , water mark height h i , Concrete mass change Δm i , volume change Δv i and crushing time T j The weight parameter ρ 1 , 2 , 3 , 4 , 5 , calculate the total comparison deviation value Q of concrete with different components, and we have:

[0019] Q=ρ 1 (|α i -α k |)+ρ 2 (|h i -h k |)+ρ 3 (|Δm i -Δm k |)+ρ 4 (|Δv i -Δv k |)+ρ 5 (|T j -T k |)

[0020] The concrete with the smallest Q value is selected as the most suitable concrete.

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

[0022] S31. Fully remove the cement slurry film on both ends of the 3D printed concrete surface;

[0023] S32. After the 3D printed concrete surface is dry, apply the sealing material evenly on the side of the 3D printed concrete, and the thickness of the sealing material is about 1mm to 2mm;

[0024] S33. Use a screw press to press the 3D printed concrete into the preheated test mold to ensure that the seal between the 3D printed concrete and the sealing material is good and there is no water leakage;

[0025] S34. Placing the 3D printed concrete in a concrete impermeability tester, which applies a constant water pressure to the 3D printed concrete;

[0026] S35. When water seepage appears on the end surface of the 3D printed concrete, the concrete impermeability tester stops working, and then the 3D printed concrete is removed and cut, and the water marks are drawn with ink as the water seepage contour;

[0027] 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 T 1 ~T 10 ;

[0028] S37. Use the average value formula to calculate the water mark height h i :

[0029]

[0030] in, It is the sum of the water mark heights after n measurements.

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

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

[0033] S42. placing the 3D printed concrete in a sulfate solution of a specified concentration and soaking it for one day, and performing a dry-wet exchange on the 3D printed concrete after the soaking is completed;

[0034] S43 repeats the above steps S41 to S42 for 10 times;

[0035] S44. The 3D printed concrete after being soaked is taken out for cleaning and drying, and weighed to obtain the mass m of the 3D printed concrete after the change. 1 ;

[0036] S45. Place the weighed 3D printed concrete in a box filled with pure water to obtain the mass of the water overflowing from the water tank, and calculate the volume v of the 3D printed concrete after the change using the liquid volume calculation formula. 1 ;

[0037] S46. The mass m of the concrete printed by 3D printing will be obtained after the change 1 The difference between the weight of the initial 3D printed concrete is calculated to obtain the concrete mass change Δm i , the concrete mass change Δm i The difference calculation formula is:

[0038] Δm i =m 0 -m 1

[0039] Among them, m 0 is the initial 3D printed concrete weight, m 1 is the mass of 3D printed concrete after the change, Δm i is the mass change of 3D printed concrete;

[0040] S47. 3D printed concrete volume v 1 The difference between the volume of the 3D printed concrete and the volume change Δv is obtained. i , the liquid volume calculation formula is:

[0041]

[0042] Among them, v 1 is the calculated volume of the liquid, m' is the mass of the water overflowing from the tank, and ρ is the density of pure water;

[0043] The liquid volume change Δv i The difference calculation formula is:

[0044] Δv i =v 0 -v 1

[0045] Among them, v 0 is the initial 3D printed concrete volume, v 1 is the volume of 3D printed concrete after the change, Δv i is the volume change of 3D printed concrete.

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

[0047] S51. Place the 3D printed concrete on a pressure testing machine, use a scanner to perform a full-scale scan of the 3D printed concrete, and use the pressure testing machine to slowly apply pressure to the 3D printed concrete. When cracks appear in the 3D printed concrete, the scanner records from this moment and obtains the crack appearance time t i ;

[0048] S52. The pressure 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 crushing time T is obtained. j ;

[0049] S53. The scanner records the occurrence of cracks in the 3D printed concrete and the complete breakage of the 3D printed concrete. The specific operation steps include:

[0050] S531. The scanner scans the plane images of multiple surfaces of the 3D printed concrete and marks them as B1 , B 2 , B 3 and B 4 ;

[0051] S532. Construct a matrix with the scanned plane image, with the lower left corner of the plane image as the origin, the origin along the plane image length direction as the x-axis direction, and the origin along the matrix height direction as the y-axis direction to construct an xy coordinate system, and two pixels close to each other are marked as 1 on the coordinate axis;

[0052] S533. Scan the 3D printed concrete crack area to obtain the corresponding coordinates of the 3D printed concrete crack in the xy coordinate system, and at the same time obtain the depth w of the concrete crack xy ;

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

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

[0055] Control module, used for data transmission within the system;

[0056] Timing module, used to record the setting time of 3D printed concrete;

[0057] Test modules for penetration testing, corrosion testing and compressive strength testing of concrete.

[0058] Preferably, the test module is internally provided with a concrete penetration test unit, a concrete corrosion resistance test unit and a concrete compressive strength test unit, wherein:

[0059] A concrete penetration test unit, which is used to perform a penetration test on 3D printed concrete, obtain the water seepage profile inside the 3D printed concrete, and calculate the water mark height according to the water seepage profile;

[0060] A concrete anti-erosion testing unit, which is used to perform an anti-erosion test on 3D printed concrete, measure the 3D printed concrete after the test, and obtain a mass change and a volume change of the concrete;

[0061] The concrete compressive strength testing unit is used to perform a compressive strength test on 3D printed concrete to obtain cracking time and crushing time of the 3D printed concrete.

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

[0063] An image acquisition module, which is used to acquire images of 3D printed concrete and obtain real-time 3D printed concrete surface crack data and real-time crack depth;

[0064] A data storage module, the data storage module is used to store the water mark height, concrete mass change, volume change and crushing time obtained in the test;

[0065] The data analysis module analyzes the setting time, water mark height, concrete mass change, volume change and crushing time of the concrete to be managed to obtain the best comprehensive value, thereby obtaining the best 3D printed concrete ratio.

[0066] On the other hand, the present invention further discloses a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the above method.

[0067] On the other hand, the present invention further 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 executes the steps of the above method.

[0068] It can be seen from the above technical solution that the present invention provides a method for controlling the quality of 3D printed concrete.

[0069] Compared with the prior art, the present invention has the following advantages:

[0070] 1. The present invention tests multiple groups of concrete with the same components but different proportions to obtain multiple groups of experimental data, and obtains the ratio between the components of the best concrete based on the experimental data, thereby ensuring the stability of the concrete performance required for 3D printing, greatly improving the safety and durability of the building, avoiding problems such as cracks and water seepage caused by improper mix ratios, and extending the service life of the building.

[0071] 2. The present invention can comprehensively record the surface status and accurately capture the crack position and morphology by scanning and marking the 3D printed concrete surface. By scanning the crack area and obtaining its coordinates and depth information, the three-dimensional characteristics of the crack can be recorded in detail, and the severity of the crack can be comprehensively evaluated, providing a reliable basis for structural safety assessment. At this time, the scanned image is constructed into a matrix and an xy coordinate system is established. By mapping the crack depth to the matrix point coordinates and connecting them to form a three-dimensional image of the crack, the three-dimensional morphology of the crack can be intuitively displayed, the crack distribution can be more accurately understood and analyzed, and ultimately crack repair and structural analysis and processing are facilitated.

[0072] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easy to understand through the following description. Of course, it is not necessary to achieve all of the advantages described above simultaneously for any product implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0074] Figure 1 It is a schematic diagram of the overall process of the method of the present invention;

[0075] Figure 2 It is a schematic diagram of the process of concrete penetration test of the present invention;

[0076] Figure 3 It is a schematic diagram of the process of concrete anti-corrosion test of the present invention;

[0077] Figure 4 It is a schematic diagram of the process of concrete compressive strength test of the present invention;

[0078] Figure 5 It is a schematic flow chart of the scanning step in the concrete compressive strength test of the present invention;

[0079] Figure 6 A schematic diagram of a process for obtaining average values ​​of multiple physical quantities according to the present invention;

[0080] Figure 7 It is a schematic diagram of the comprehensive comparison of the present invention;

[0081] Figure 8 It is the overall structural framework diagram of the system of the present invention. DETAILED DESCRIPTION

[0082] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0083] In the embodiment, see Figures 1 to 8 .

[0084] like Figure 1As shown, a 3D printing concrete quality control method proposed in an embodiment of the present invention includes the following specific operation steps:

[0085] S1. Obtain the ratio between multiple identical 3D printed concretes to be tested and the components of 3D printed concrete, and flatten the extracted 3D printed concrete to be tested to form multiple cubic specimens with a side length of 150 mm. At this time, obtaining multiple identical 3D printed concrete samples to be tested and forming cubic specimens of standard size can ensure the consistency and comparability of the 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;

[0086] S2. Obtain the setting time α of the 3D printed concrete to be tested i ;

[0087] At this time, obtaining the solidification time of the 3D printed concrete to be tested can play a role in monitoring the curing rate of the material, thereby achieving the effect of optimizing the construction process and improving work efficiency;

[0088] S3. Perform a penetration test on one of the solidified 3D printed concrete to obtain the water mark height h i , at this time, it can play a role in evaluating the waterproof performance of the material, such as Figure 2 As shown, the specific operation process includes:

[0089] S31. Use tools to clean the surface of the 3D printed concrete and fully remove the cement slurry film on both end surfaces;

[0090] S32. After the cleaned 3D printed concrete is dried, the sealing material is evenly applied to the side of the 3D printed concrete, and the thickness of the sealing material is about 1 mm to 2 mm;

[0091] S33. Use a screw press to press the 3D printed concrete into the preheated test mold to ensure that the seal between the 3D printed concrete and the sealing material is good and there is no water leakage;

[0092] S34. Placing the 3D printed concrete in a concrete impermeability tester, which applies a constant water pressure to the 3D printed concrete;

[0093] S35. When water seepage appears on the end surface of the 3D printed concrete, the concrete impermeability tester stops working, and then the 3D printed concrete is removed and cut, and the water marks are drawn with ink as the water seepage contour;

[0094] 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 T 1 ~T 10 ;

[0095] S37. Use the average value formula to calculate the water mark height h i :

[0096]

[0097] in, It is the sum of the water mark heights after n measurements;

[0098] It should be noted that 3D printed concrete with the same components but different proportions has different impermeability. During the test, the concrete impermeability meter 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 internal seepage profile of the 3D printed concrete and the measurement of the water mark height directly reflect the distribution of pores and cracks in the 3D printed concrete, thereby indirectly evaluating the density and impermeability of the 3D printed concrete.

[0099] S4. Perform an anti-corrosion test on another solidified 3D printed concrete to obtain the concrete mass change Δm i and volume change Δv i , at this time, it can play a role in evaluating the material's ability to resist environmental damage, such as Figure 3 As shown, the specific operation process includes:

[0100] S41. Measuring the weight and volume of the 3D printed concrete to obtain the initial 3D printed concrete weight and the 3D printed concrete volume;

[0101] S42. placing the 3D printed concrete in a sulfate solution of a specified concentration and soaking it for one day, and performing a dry-wet exchange on the 3D printed concrete after the soaking is completed;

[0102] S43 repeats the above steps S41 to S42 for 10 times;

[0103] S44. The 3D printed concrete after being soaked is taken out for cleaning and drying, and weighed to obtain the mass m of the 3D printed concrete after the change. 1 ;

[0104] S45. Place the weighed 3D printed concrete in a box filled with pure water to obtain the mass of the water overflowing from the water tank, and calculate the volume v of the 3D printed concrete after the change using the liquid volume calculation formula. 1 ;

[0105] S46. The mass m of the concrete printed by 3D printing will be obtained after the change 1 The difference between the weight of the initial 3D printed concrete is calculated to obtain the concrete mass change Δm i, concrete mass change Δm i The difference calculation formula is:

[0106] Δm i =m 0 -m 1

[0107] Among them, m 0 is the initial 3D printed concrete weight, m 1 is the mass of 3D printed concrete after the change, Δm i is the mass change of 3D printed concrete;

[0108] S47. 3D printed concrete volume v 1 The difference between the volume of the 3D printed concrete and the volume change Δv is obtained. i , the liquid volume calculation formula is:

[0109]

[0110] Among them, v 1 is the calculated volume of the liquid, m' is the mass of the water overflowing from the tank, and ρ is the density of pure water;

[0111] Liquid volume change Δv i The difference calculation formula is:

[0112] Δv i =v 0 -v 1

[0113] Among them, v 0 is the initial 3D printed concrete volume, v 1 is the volume of 3D printed concrete after the change, Δv i is the volume change of 3D printed concrete;

[0114] It should be noted that the 3D printed concrete with the same ingredients but different proportions has different corrosion resistance. The depth of the prepared sulfate solution is 75mm, and the 10 cycles and one-day soaking time setting can fully reflect the durability of the 3D printed concrete in an acid-base environment. Through the corrosion resistance test, while ensuring the accuracy of the test results, the test efficiency is improved, and the corrosion resistance of the material in a specific environment can be accurately evaluated to ensure that the material will not fail due to corrosion in actual application, thereby improving the overall performance and safety of the product.

[0115] S5. Perform compressive strength tests on multiple 3D printed concretes after solidification to obtain the time t when cracks appear in the 3D printed concrete i and crushing time T j ,like Figure 4 As shown, the specific operation process includes:

[0116] S51. Place the 3D printed concrete on a pressure testing machine, use a scanner to perform a full-scale scan of the 3D printed concrete, and use the pressure testing machine to slowly apply pressure to the 3D printed concrete. When cracks appear in the 3D printed concrete, the scanner records from this moment and obtains the crack appearance time t i ;

[0117] S52. The pressure 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 crushing time T is obtained. j ;

[0118] S53. The scanner records the occurrence of cracks in the 3D printed concrete and the complete breakage of the 3D printed concrete;

[0119] It should be noted that the compressive strength of 3D printed concrete with the same components but different proportions varies. The compressive strength test is an important indicator for evaluating the maximum pressure that a material or structure can withstand without being damaged when subjected to compression. The press slowly pressurizes the 3D printed concrete from zero, and the scanner scans the 3D printed concrete in real time. When cracks appear in the 3D printed concrete, the scanner records the time of the cracks and stores the 3D printed concrete shape at that moment. The scanner then stores each change of the 3D printed concrete until the 3D printed concrete is crushed.

[0120] Further, such as Figure 5 As shown, the specific operation process of step S53 includes:

[0121] S531. The scanner scans the plane images of multiple surfaces of the 3D printed concrete and marks them as B 1 , B 2 , B 3 and B 4 At this time, by scanning and marking multiple surfaces of 3D printed concrete, it can play a role in comprehensively recording the surface status of concrete, thereby achieving the effect of accurately capturing the location and morphology of cracks, and finally providing a detailed data basis for subsequent analysis;

[0122] S532. Construct a matrix with the scanned plane image, with the lower left corner of the plane image as the origin, the origin along the plane image length direction as the x-axis direction, and the origin along the matrix height direction as the y-axis direction to construct an xy coordinate system, and two pixels close to each other are marked as 1 on the coordinate axis;

[0123] S533. Scan the 3D printed concrete crack area to obtain the corresponding coordinates of the 3D printed concrete crack in the xy coordinate system, and at the same time obtain the depth w of the concrete crack xy ;

[0124] S534. The concrete crack depth w xy After being mapped to the corresponding matrix point coordinates, two adjacent coordinate points are connected to form a three-dimensional crack image. 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 crack image, which can intuitively display the three-dimensional morphology of the crack, thereby achieving a more accurate understanding and analysis of the crack distribution.

[0125] In summary, the multiple matrices of the 3D printed concrete side obtained by scanning enable subsequent processing to accurately determine the accurate coordinate plane of each point on the 3D printed concrete surface. Accurate coordinate information helps to maintain the consistency and continuity of the image during the scanning process. At the same time, during the scanning process, the depth information of each point is obtained. By combining the two-dimensional image and the depth information, cracks can be more accurately identified and located to avoid missed detection or false detection. At the same time, the three-dimensional image formed provides a full-view of the cracks, which helps analysts to understand the cracks more comprehensively and make more accurate assessments and decisions. At the same time, the staff can analyze the three-dimensional image to obtain the crack resistance of the 3D printed concrete.

[0126] S6. By changing the ratio between the components of the 3D printed concrete to be tested and the 3D printed concrete, repeat the above steps to perform multiple groups of experiments, and obtain the concrete solidification time α of the multiple groups of experiments respectively. i , water mark height h i , Concrete mass change Δm i , volume change Δv i and crushing time T j ;

[0127] S7. The concrete setting time α obtained from multiple groups of experiments i , water mark height h i , Concrete mass change Δm i , volume change Δv i and crushing time T j Calculate and obtain multiple average values ​​α k 、h k , Δm k , Δv k and T k ,like Figure 6 As shown, the specific operation process includes:

[0128] Multiple groups of concrete setting time α i , water mark height hi , Concrete mass change Δm i , volume change Δv i and crushing time T j They are respectively formed into bar graphs;

[0129] The horizontal axis of the bar graph is the nth experiment, and the vertical axis is the obtained physical quantity. Use the average value formula to obtain multiple average values ​​α k 、h k , Δm k , Δv k and T k :

[0130] At this time, a bar chart is constructed based on the information obtained. Through the length or height of the bar, the staff can intuitively feel the size and change trend of the data, and can easily understand the information represented by the bar chart and quickly obtain the required data from it. Through the average values ​​of different physical quantities, the different properties of 3D printed concrete can be preliminarily analyzed. At the same time, the average value can be used as the most important reference standard to help determine which formula has better physical properties.

[0131] S8. Figure 7 As shown, the setting time of concrete with different compositions α i , water mark height h i , Concrete mass change Δm i , volume change Δv i and crushing time T j Respectively with multiple average values ​​α k 、h k , Δm k , Δv k and T k For comparison, the preset concrete setting time α i , water mark height h i , Concrete mass change Δm i , volume change Δv i and crushing time T j The weight parameter ρ 1 , 2 , 3 , 4 , 5 , calculate the total comparison deviation value Q of concrete with different components, and we have:

[0132] Q=ρ 1 (|α i -α k |)+ρ 2 (|h i -h k|)+ρ 3 (|Δm i -Δm k |)+ρ 4 (|Δv i -Δv k |)+ρ 5 (|T j -T k |)

[0133] Selecting the concrete with the smallest Q value as the most suitable concrete can play a role in systematically improving product quality, thereby achieving the goal of continuously optimizing the production process;

[0134] At this time, the offset between the physical quantity obtained from each group of tests and the average value can be calculated, and the subsequent comprehensive comparison can be facilitated based on the offset data. When the weight parameter is not considered (the weight parameter is 1), the deviation degree of each physical quantity can be combined to form a unified evaluation index by summing up the offset data. 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;

[0135] In addition, it should be noted that the concrete setting time α is also entered here. i , water mark height h i , Concrete mass change Δm i , volume change Δv i and crushing time T j Different weight parameters are used according to different concrete usage purposes, which can quickly screen and obtain different concrete data according to requirements, making it convenient to screen and adjust according to actual usage purposes to obtain concrete data with specified effects (specific characteristics);

[0136] In addition, by testing multiple groups of concrete with the same ingredients but different proportions, multiple groups of experimental data were obtained. The ratio between the components of the best concrete was obtained based on the experimental data to ensure the stability of the concrete performance required for 3D printing, greatly improving the safety and durability of the building, avoiding problems such as cracks and water seepage caused by improper mix ratios, and extending the service life of the building.

[0137] On the other hand, Figure 8 As shown, the present invention also discloses a 3D printing concrete quality control system, which is used to implement the above-mentioned 3D printing concrete quality control method, including:

[0138] Control module, used for data transmission within the system;

[0139] Timing module, used to record the setting time of 3D printed concrete;

[0140] Test modules for penetration testing, erosion testing and compressive strength testing of concrete;

[0141] The test module is equipped with a concrete penetration test unit, a concrete erosion resistance test unit and a concrete compressive strength test unit, among which:

[0142] Concrete penetration test unit: The concrete penetration test unit is used to conduct a penetration test on 3D printed concrete, obtain the internal water seepage profile of the 3D printed concrete, and calculate the water mark height according to the water seepage profile;

[0143] A concrete anti-erosion test unit, which is used to perform an anti-erosion test on 3D printed concrete, measure the 3D printed concrete after the test, and obtain the mass change and volume change of the concrete;

[0144] Concrete compressive strength test unit: The concrete compressive strength test unit is used to test the compressive strength of 3D printed concrete and obtain the time when cracks and crushing of 3D printed concrete appear;

[0145] An image acquisition module is used to acquire images of 3D printed concrete and obtain real-time 3D printed concrete surface crack data and real-time crack depth;

[0146] A data storage module, the data storage module is used to store the water mark height, concrete mass change, volume change and crushing time obtained in the test;

[0147] Data analysis module: The data analysis module analyzes the setting time, water mark height, concrete mass change, volume change and crushing time of the concrete to be managed, and obtains the best comprehensive value, so as to obtain the best concrete ratio for 3D printing.

[0148] On the other hand, the present invention further discloses a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the above method.

[0149] On the other hand, the present invention further 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 executes the steps of the above method.

[0150] In another embodiment provided in the present application, a computer program product including instructions is also provided, which, when executed on a computer, enables the computer to execute any one of the 3D printing concrete quality control methods in the above embodiments.

[0151] It is understandable that the system provided by the embodiment of the present invention corresponds to the method provided by the embodiment of the present invention, and the explanation, examples and beneficial effects of the relevant contents can refer to the corresponding parts in the above method.

[0152] The embodiment of the present application also provides an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus.

[0153] Memory, used to store computer programs;

[0154] The processor is used to implement the above-mentioned 3D printing concrete quality control method when executing the program stored in the memory.

[0155] The communication bus mentioned in the above electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0156] The communication interface is used for communication between the above electronic device and other devices.

[0157] The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0158] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components.

[0159] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of 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, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0160] 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 principle of the present invention should be included in the protection scope of the present invention.

[0161] In addition, it should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0162] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, in the embodiments of the present invention, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. 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 required by the present invention.

Claims

1. A 3D printing concrete quality control method, characterized in that: The specific steps are as follows: S1. Obtain the ratio between the components of multiple identical 3D printed concretes to be tested and 3D printed concretes, and level the extracted 3D printed concretes to be tested to form multiple cubic specimens with a side length of 150 mm; S2. Obtain the setting time α of the 3D printed concrete to be tested i ; S3. Perform a penetration test on one of the solidified 3D printed concrete to obtain the water mark height h i ; S4. Perform an anti-corrosion test on another solidified 3D printed concrete to obtain the concrete mass change Δm i and volume change Δv i ; S5. Perform compressive strength tests on multiple 3D printed concretes after solidification to obtain the time t when cracks appear in the 3D printed concrete i and crushing time T j ; S6. By changing the ratio between the components of the 3D printed concrete to be tested and the 3D printed concrete, repeat the above steps to perform multiple groups of experiments, and obtain the concrete solidification time α of the multiple groups of experiments respectively. i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j ; S7. The concrete setting time α obtained from multiple sets of experiments i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j Calculate and obtain multiple average values ​​α k 、h k , Δm k , Δv k and T k ; S8. The setting time of concrete with different compositions α i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j Respectively with multiple average values ​​α k 、h k , Δm k , Δv k and T k For comparison, the preset concrete setting time α i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j The weight parameters ρ1, ρ2, ρ3, ρ4, ρ5 are used to calculate the total comparison deviation Q of concrete with different components: Q=ρ1(|α i -a k |)+ρ2(|h i -h k |)+ρ3(|Δm i -Dm k |)+ρ4(|Δv i -Δv k |)+ρ5(|T j -T k |) The concrete with the smallest Q value is selected as the most suitable concrete.

2. The 3D printing concrete quality control method according to claim 1, characterized in that: The specific operation process of the S3 step includes: S31. Fully remove the cement slurry film on both ends of the 3D printed concrete surface; S32. After the 3D printed concrete surface is dry, apply the sealing material evenly on the side of the 3D printed concrete, and the thickness of the sealing material is about 1mm to 2mm; S33. Use a screw press to press the 3D printed concrete into the preheated test mold to ensure that the seal between the 3D printed concrete and the sealing material is good and there is no water leakage; S34. Placing the 3D printed concrete in a concrete impermeability tester, which applies a constant water pressure to the 3D printed concrete; S35. When water seepage appears on the end surface of the 3D printed concrete, the concrete impermeability tester stops working, and then the 3D printed concrete is removed and cut, and the water marks are drawn with ink as the water seepage contour; S36. Randomly mark 10 test points on the water mark and measure the height of the 10 test points to obtain the water mark heights T1~T 10 ; S37. Use the average value formula to calculate the water mark height h i : in, It is the sum of the water mark heights after n measurements.

3. The 3D printing concrete quality control method according to claim 1, characterized in that: The specific operation process of the S4 step includes: S41. Measuring the weight and volume of the 3D printed concrete to obtain the initial 3D printed concrete weight and the 3D printed concrete volume; S42. placing the 3D printed concrete in a sulfate solution of a specified concentration and soaking it for one day, and performing a dry-wet exchange on the 3D printed concrete after the soaking is completed; S43 repeats the above steps S41 to S42 for 10 times; S44. The soaked 3D printed concrete is taken out for cleaning and drying, and weighed to obtain the mass m1 of the 3D printed concrete after the change; S45. The weighed 3D printed concrete is placed in a box filled with pure water to obtain the mass of the water overflowing from the water tank, and the volume v1 of the 3D printed concrete after the change is obtained by the liquid volume calculation formula; S46. Calculate the difference between the mass m1 of the 3D printed concrete after the change and the initial 3D printed concrete weight to obtain the concrete mass change Δm i , the concrete mass change Δm i The difference calculation formula is: Δm i =m0-m1 Where m0 is the initial 3D printed concrete weight, m1 is the 3D printed concrete mass after the change, and Δm i is the mass change of 3D printed concrete; S47. Calculate the difference between the 3D printed concrete volume v1 and the 3D printed concrete volume to obtain the volume change Δv i , the liquid volume calculation formula is: Among them, v1 is the calculated volume of the liquid, m , is the mass of water overflowing from the water tank, and ρ is the density of pure water; The liquid volume change Δv i The difference calculation formula is: Δv i =v0-v1 Where v0 is the initial 3D printed concrete volume, v1 is the 3D printed concrete volume after the change, and Δv i is the volume change of 3D printed concrete.

4. The 3D printing concrete quality control method according to claim 1, characterized in that: The specific operation process of step S5 includes: S51. Place the 3D printed concrete on a pressure testing machine, use a scanner to perform a full-scale scan of the 3D printed concrete, and use the pressure testing machine to slowly apply pressure to the 3D printed concrete. When cracks appear in the 3D printed concrete, the scanner records from this moment and obtains the crack appearance time t i ; S52. The pressure 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 crushing time T is obtained. j ; S53. The scanner records the occurrence of cracks in the 3D printed concrete and the complete breakage of the 3D printed concrete.

5. The 3D printing concrete quality control method according to claim 4, characterized in that: The specific operation process of step S53 includes: S531. The scanner scans the planar images of multiple surfaces of the 3D printed concrete and marks them as B1, B2, B3 and B4; S532. Construct a matrix with the scanned plane image, with the lower left corner of the plane image as the origin, the origin along the plane image length direction as the x-axis direction, and the origin along the matrix height direction as the y-axis direction to construct an xy coordinate system, and two pixels close to each other are marked as 1 on the coordinate axis; S533. Scan the 3D printed concrete crack area to obtain the corresponding coordinates of the 3D printed concrete crack in the xy coordinate system, and at the same time obtain the depth w of the concrete crack xy ; S534. The concrete crack depth w xy After mapping to the corresponding matrix point coordinates, two adjacent coordinate points are connected to form a three-dimensional image of the crack.

6. The 3D printing concrete quality control method according to claim 1, characterized in that: The specific operation process of step S7 includes: Multiple groups of concrete setting time α i , water mark height h i , concrete mass change Δm i , volume change Δv i and crushing time T j They are respectively formed into bar graphs; The horizontal axis of the bar graph is the nth experiment, and the vertical axis is the obtained physical quantity. Use the average value formula to obtain multiple average values ​​α k 、h k , Δm k , Δv k and T k :

7. A 3D printing concrete quality control system, used to implement the 3D printing concrete quality control method according to any one of claims 1 to 6, characterized in that: include: Control module, used for data transmission within the system; Timing module, used to record the setting time of 3D printed concrete; Test modules for penetration testing, erosion testing and compressive strength testing of concrete; The test module is internally provided with a concrete penetration test unit, a concrete corrosion resistance test unit and a concrete compressive strength test unit, wherein: A concrete penetration test unit, which is used to perform a penetration test on 3D printed concrete, obtain the water seepage profile inside the 3D printed concrete, and calculate the water mark height according to the water seepage profile; A concrete anti-erosion testing unit, which is used to perform an anti-erosion test on 3D printed concrete, measure the 3D printed concrete after the test, and obtain a mass change and a volume change of the concrete; The concrete compressive strength testing unit is used to perform a compressive strength test on 3D printed concrete to obtain cracking time and crushing time of the 3D printed concrete.

8. The 3D printing concrete quality control system according to claim 7, characterized in that: Also includes: An image acquisition module, which is used to acquire images of 3D printed concrete and obtain real-time 3D printed concrete surface crack data and real-time crack depth; A data storage module, the data storage module is used to store the water mark height, concrete mass change, volume change and crushing time obtained in the test; The data analysis module analyzes the setting time, water mark height, concrete mass change, volume change and crushing time of the concrete to be managed to obtain the best comprehensive value, thereby obtaining the best 3D printed concrete ratio.

9. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the processor is caused to execute the steps of the method according to any one of claims 1 to 6.

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

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