Methods, apparatus and storage media for determining the mixing uniformity of mortar

Abstract

This application provides a method, apparatus, and storage medium for determining the mixing uniformity of mortar, belonging to the technical field of dry-mixed mortar production quality control. The method includes: determining the quantitative relationship between the content of a target additive in the mortar and the water retention rate of the mortar; based on the quantitative relationship, determining a second threshold for the coefficient of variation of the water retention rate according to a preset first threshold for the coefficient of variation of the target additive content; after the mortar to be tested is mixed, obtaining multiple samples distributed at different spatial locations from the mixed materials; obtaining the second water retention rate of the multiple samples; determining the central tendency and dispersion of the second water retention rate for all samples; calculating the current actual water retention rate coefficient of variation of the mortar to be tested based on the central tendency and dispersion; comparing the actual water retention rate coefficient of variation with the second threshold, and determining whether the mixing uniformity of the mortar to be tested is qualified based on the comparison result.

Description

Technical Field

[0001] This application relates to the field of quality control technology for dry-mixed mortar production, specifically to a method, apparatus, and storage medium for determining the mixing uniformity of mortar. Background Technology

[0002] With the accelerated modernization of the construction industry, dry-mixed mortar has become an indispensable core material in construction projects due to its advantages such as precise factory mixing, stable performance, and environmental friendliness. Decorative mortar, as a key product for surface decoration and beautification, directly determines the integrity, aesthetics, and long-term durability of the building's appearance. Among these factors, mixing uniformity is a core indicator for decorative mortar. Existing methods for testing mortar mixing uniformity mainly employ the methyl violet tracer method. However, after using the methyl violet tracer method for mixing uniformity assessment, the product cannot be used normally. Furthermore, because decorative mortar contains natural or artificial pigments, these components can superimpose or interfere with the purple color of methyl violet, making it impossible for spectrophotometers to accurately measure the absorbance of methyl violet and calculate the coefficient of variation from the absorbance data. This results in an inability to quantitatively assess the mixing uniformity of colored decorative mortar. Summary of the Invention

[0003] The purpose of this application is to provide a method, apparatus, and storage medium for determining the mixing uniformity of mortar.

[0004] To achieve the above objectives, the first aspect of this application provides a method for determining the mixing uniformity of mortar, comprising: Determine the quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar; Based on the quantitative relationship, the second threshold of the water retention rate variation coefficient is determined according to the first threshold of the target additive content variation coefficient. After the mortar to be tested is mixed, multiple samples distributed in different spatial locations are obtained from the mixed material. Obtain the second water retention rate of multiple samples; For all samples, determine the central tendency and dispersion of the second water retention rate; Based on the central tendency and the degree of dispersion, the coefficient of variation of the actual water retention rate of the mortar to be tested is calculated. The coefficient of variation of the actual water retention rate is compared with the second threshold, and the mixing uniformity of the mortar to be tested is determined based on the comparison results.

[0005] In this embodiment of the application, determining the quantitative relationship between the target additive content and the water retention rate of the mortar includes: preparing multiple sets of sample mortar materials and mixing each set of sample mortar materials evenly, wherein the target additive content of each set of sample mortar materials is different, and the proportions of other components except for the target additive content are the same; obtaining the first water retention rate of the multiple sets of sample mortar materials; and performing linear regression analysis on the target additive content and the first water retention rate for all sample mortar materials to obtain the quantitative relationship between the target additive content and the water retention rate of the mortar.

[0006] In this embodiment of the application, the method further includes, after determining the quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar, obtaining a preset average content value for the target additive, wherein the preset average content value is the commonly used design dosage of the target additive under normal application conditions, and determining a second threshold for the coefficient of variation of the water retention rate based on the quantitative relationship and a first threshold for the coefficient of variation of the target additive content, including: calculating the predicted value of the water retention rate of the mortar based on the preset average content value and the quantitative relationship; calculating the theoretical standard deviation of the target additive content based on the preset average content value and the first threshold; calculating the predicted standard deviation of the water retention rate of the mortar based on the theoretical standard deviation and the quantitative relationship; and determining the second threshold based on the ratio of the predicted standard deviation value to the predicted water retention rate value.

[0007] In this embodiment of the application, determining the second threshold based on the ratio of the predicted standard deviation value and the predicted water retention rate value further includes: obtaining a preset operation error of the water retention rate test; correcting the predicted standard deviation value based on the preset operation error; and determining the second threshold based on the ratio of the corrected predicted standard deviation value and the predicted water retention rate value.

[0008] In this embodiment of the application, the average value of the second water retention rate of multiple samples is used to define the central tendency of the second water retention rate, and the standard deviation of the second water retention rate of multiple samples is used to define the degree of dispersion.

[0009] In this embodiment of the application, comparing the actual water retention rate variation coefficient with a second threshold and determining whether the mixing uniformity of the mortar to be tested is qualified based on the comparison result includes: if the actual water retention rate variation coefficient is less than or equal to the second threshold, determining that the mixing uniformity of the mortar to be tested is qualified; if the actual water retention rate variation coefficient is greater than the second threshold, determining that the mixing uniformity of the mortar to be tested is unqualified, and adjusting the mixing parameters.

[0010] In this embodiment of the application, the mortar to be tested is mixed using a mixer, and multiple samples distributed in different spatial locations are obtained from the mixed material. This includes obtaining mortar samples to be tested at multiple preset sampling points within the mixer. The preset sampling points are set in the upper, middle and lower parts of the mixer, and each height includes at least two central sampling points and four edge sampling points.

[0011] In this embodiment, the mortar is decorative mortar, and the target additive is cellulose ether.

[0012] A second aspect of this application provides an apparatus for determining the mixing uniformity of mortar, comprising: The memory is configured to store instructions; The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement the aforementioned method for determining the mixing uniformity of mortar.

[0013] A third aspect of this application provides a machine-readable storage medium storing instructions that, when executed by a processor, configure the processor to perform the aforementioned method for determining the mixing uniformity of mortar.

[0014] The above technical solution establishes a quantitative relationship between the content of the target additive in the mortar and its water retention rate. Based on this quantitative relationship, a second threshold for the water retention rate variation coefficient is determined according to a preset first threshold for the coefficient of variation of the target additive content and the average content of the target additive. Multiple samples of the mixed mortar from different spatial locations are then acquired, and the water retention rate of these samples is tested. The actual water retention rate variation coefficient of the mortar is calculated, and compared with the second threshold. Based on the comparison results, the mixing uniformity of the mortar is determined to be acceptable. This achieves a quantitative evaluation of mortar mixing uniformity without the use of tracers, solving the problem that colored mortar cannot be evaluated for uniformity using tracer methods. Furthermore, the quantitative evaluation of mixing uniformity does not affect the normal use of the product.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1 The schematic diagram illustrates a process flow diagram of a method for determining the mixing uniformity of mortar according to an embodiment of this application; Figure 2 The diagram illustrates a linear relationship curve between the cellulose ether content and the water retention rate of mortar according to an embodiment of this application. Figure 3 This illustration schematically shows a distribution diagram of preset sampling points according to an embodiment of this application; Figure 4The diagram illustrates the internal structure of a computer device according to an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] Figure 1 The illustration schematically shows a flowchart of a method for determining the mixing uniformity of mortar according to an embodiment of this application. Figure 1 As shown in one embodiment of this application, a method for determining the mixing uniformity of mortar is provided, comprising the following steps: Step 101: Determine the quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar.

[0019] Step 102: Based on the quantitative relationship, determine the second threshold of the water retention rate variation coefficient according to the first threshold of the target additive content variation coefficient.

[0020] Step 103: After the mortar to be tested is mixed, obtain multiple samples distributed in different spatial locations from the mixed materials.

[0021] Step 104: Obtain the second water retention rate of multiple samples.

[0022] Step 105: For all samples, determine the central tendency and dispersion of the second water retention rate.

[0023] Step 106: Calculate the coefficient of variation of the actual water retention rate of the mortar to be tested based on central tendency and dispersion.

[0024] Step 107: Compare the actual water retention rate variation coefficient with the second threshold, and determine whether the mixing uniformity of the mortar to be tested is qualified based on the comparison result.

[0025] The uniformity of mortar mixing refers to the evenness of the distribution of each component in the mortar. This uniformity directly affects the mortar's performance and appearance. Mortar water retention rate refers to the mortar's ability to retain moisture under specified conditions, which can be quantitatively determined using standardized testing methods. The processor can determine the quantitative relationship between the content of a target additive in the mortar and its water retention rate. Based on this quantitative relationship, and according to a preset first threshold for the coefficient of variation of the target additive content, a second threshold for the coefficient of variation of the water retention rate is determined. The preset average content of the target additive is the commonly designed dosage of the target additive under normal application conditions. Then, after the mortar to be tested is mixed, the processor can obtain multiple samples distributed at different spatial locations from the resulting mixture and obtain the second water retention rate of each sample. Specifically, in one embodiment, the second water retention rate of the sample can be determined according to the filter plate method specified in European standard DIN EN 18555-7 (2019). Furthermore, the processor can determine the central tendency and dispersion of the second water retention rate based on the water retention rate measurement results of all samples, and calculate the coefficient of variation of the current actual water retention rate of the mortar under test based on the central tendency and dispersion. Specifically, the central tendency of the second water retention rate is defined by the average value of the second water retention rate of multiple samples, and the dispersion is defined by the standard deviation of the second water retention rate of multiple samples. The coefficient of variation of the current actual water retention rate of the mortar under test is determined based on the ratio of the standard deviation to the average value of the second water retention rate. Further, the processor can compare the actual water retention rate coefficient of variation with a second threshold, and determine whether the mixing uniformity of the mortar under test is qualified based on the comparison result.

[0026] In one embodiment, determining the quantitative relationship between the target additive content and the water retention rate of the mortar includes: preparing multiple sets of sample mortar materials and mixing each set of sample mortar materials evenly, wherein the target additive content of each set of sample mortar materials is different, and the proportions of other components except the target additive content are the same; obtaining the first water retention rate of the multiple sets of sample mortar materials; and performing linear regression analysis on the target additive content and the first water retention rate for all sample mortar materials to obtain the quantitative relationship between the target additive content and the water retention rate of the mortar. For example, in one embodiment, 6 sets of sample mortar materials are prepared, and the proportions of all components except the sample additive are fixed. The target additive content (mass percentage) is set to 0%, 0.01%, 0.02%, 0.03%, 0.04%, and 0.05%. 5 kg of material from each set is slowly stirred for 120 s, and the water retention rate of the mortar is determined according to the filter plate method specified in European standard DIN EN 18555-7 (2019). Each set is measured in parallel 5 times, and the average value is taken as the water retention rate data corresponding to the cellulose ether content. Plot a linear relationship curve between the target additive content (x-axis) and the corresponding average water retention rate (y-axis), and perform linear regression analysis to obtain the regression equation (e.g., y = ax + b, where y is the water retention rate, x is the target additive content, and a and b are regression coefficients). Specifically, the linear correlation coefficient R² of the regression equation should be greater than or equal to 0.98 to ensure the reliability of the linear correlation between the target additive content and the water retention rate.

[0027] In one embodiment, the method further includes, after determining the quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar, obtaining a preset average content value for the target additive, where the preset average content value is the commonly designed dosage of the target additive under normal application conditions. Based on the quantitative relationship, determining a second threshold for the coefficient of variation of the water retention rate according to a preset first threshold for the coefficient of variation of the target additive content includes: calculating a predicted value for the water retention rate of the mortar based on the preset average content value and the quantitative relationship; calculating a theoretical standard deviation for the target additive content based on the preset average content value and the first threshold; calculating a predicted standard deviation for the water retention rate of the mortar based on the theoretical standard deviation and the quantitative relationship; and determining the second threshold based on the ratio of the predicted standard deviation to the predicted water retention rate. Specifically, determining the second threshold based on the ratio of the predicted standard deviation to the predicted water retention rate further includes: obtaining a preset operating error for the water retention rate test; correcting the predicted standard deviation based on the preset operating error; and determining the second threshold based on the ratio of the corrected predicted standard deviation to the predicted water retention rate.

[0028] For example, in one embodiment, the first threshold is a globally accepted acceptable threshold for mixing uniformity in the dry-mixed mortar industry (additive content variation coefficient ≤ 5%), the mortar is decorative mortar, the target additive is cellulose ether, and under conventional application conditions, the commonly designed dosage of cellulose ether is 0.01%~0.05%. Therefore, those skilled in the art can set a preset average content of 0.02% based on experience. Figure 2 As shown, Figure 2 This is a schematic diagram illustrating the linear relationship between cellulose ether content and mortar water retention rate according to an embodiment of this application. The quantitative relationship between cellulose ether content and mortar water retention rate is as follows: ,in, For the water retention rate of mortar, The cellulose ether content is used. Based on the preset average content and quantitative relationship, the predicted water retention rate of the mortar is calculated:

[0029] in, This is the predicted water retention rate of the mortar. The average value of the preset content of cellulose ethers will be... Substituting into the above formula, we get: Based on the preset average content and the first threshold, the theoretical standard deviation of cellulose ether content is calculated:

[0030] in, The coefficient of variation for cellulose ether content is _____. This represents the theoretical standard deviation of the cellulose ether content. This represents the average value of the preset content of cellulose ethers. , Substituting into the above formula, we get: Based on the theoretical standard deviation and quantitative relationship, the predicted standard deviation of mortar water retention rate is calculated:

[0031] in, This represents the predicted standard deviation of the mortar water retention rate. The theoretical standard deviation of cellulose ethers is given. Substituting into the above formula, we can obtain, Furthermore, the predicted standard deviation is corrected based on a preset operating error. This preset operating error is set by those skilled in the art based on experience; in this embodiment, the preset operating error is set to 0.9%. Therefore, the water retention rate deviation caused by the operating error in the water retention rate test is... ,in, This is the predicted water retention rate of the mortar. The predicted standard deviation is corrected based on the following formula:

[0032] in, This is the corrected predicted standard deviation. The standard deviation predictions are as follows: To pre-determine the water retention rate deviation caused by operational errors, , Substituting into the above formula, we can obtain The second threshold is determined based on the ratio of the corrected standard deviation prediction to the water retention rate prediction.

[0033] in, The second threshold, This is the corrected predicted standard deviation. This is the predicted water retention rate of the mortar.

[0034] In one embodiment, mixing the mortar to be tested using a mixer and obtaining multiple samples distributed at different spatial locations from the resulting mixture includes: obtaining mortar samples to be tested at multiple preset sampling points within the mixer, wherein the preset sampling points are located in the upper, middle, and lower parts of the mixer, and each height includes at least two central sampling points and four edge sampling points. For example, in one embodiment, such as Figure 3 As shown, preset sampling points were set in the upper, middle, and lower parts of the mixer (depths 1, 2, and 3 in the diagram). Each height included two central sampling points (sampling point 2 and sampling point 5 in the diagram) and four edge sampling points (sampling point 1, sampling point 3, sampling point 4, and sampling point 6 in the diagram), for a total of 18 preset sampling points. Among them, sampling points 4 and 6 are located near the mixer valve, where residues or uneven mixing are likely to exist, which has a significant impact on the uniformity of mortar mixing. After the mortar to be tested was uniformly mixed, a powder sampler was used to sample at the 18 preset sampling points in the mixer, with 0.5 kg sampled at each sampling point, for a total of 18 samples.

[0035] In one embodiment, comparing the actual water retention rate coefficient of variation with a second threshold and determining whether the mixing uniformity of the mortar to be tested is qualified based on the comparison result includes: if the actual water retention rate coefficient of variation is less than or equal to the second threshold, determining that the mixing uniformity of the mortar to be tested is qualified; if the actual water retention rate coefficient of variation is greater than the second threshold, determining that the mixing uniformity of the mortar to be tested is unqualified, and adjusting the mixing parameters. For example, in one embodiment, the second threshold is 1%, then when the actual water retention rate coefficient of variation CV ≤ 1%, the mixing uniformity of the decorative mortar is determined to be qualified; when CV > 1%, the mixing uniformity is determined to be unqualified, and the mixing parameters need to be adjusted and remixed.

[0036] In one embodiment, the mortar is decorative mortar, and the target additive is cellulose ether. Decorative mortar is a mortar product used for the decoration and beautification of building surfaces. Its appearance color has specific design requirements, and it contains natural or artificial pigments. Cellulose ether is a key additive in decorative mortar, and its content is significantly linearly correlated with the water retention rate of the mortar.

[0037] Through the above embodiments, by determining the quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar, and based on the quantitative relationship, a second threshold for the coefficient of variation of the water retention rate is determined according to a first threshold for the coefficient of variation of the target additive content and the average content of the target additive. Multiple samples of the mixed mortar from different spatial locations were obtained, and the water retention rate of the samples was tested. The coefficient of variation of the actual water retention rate of the mortar was calculated, and the coefficient of variation was compared with a second threshold. Based on the comparison results, it was determined whether the mixing uniformity of the mortar was qualified. This method achieves quantitative evaluation of mortar mixing uniformity without the use of tracers, solving the problem that the mixing uniformity of colored decorative mortar cannot be quantitatively evaluated using the methyl violet tracer method. The applicability covers all types of decorative mortar. It avoids the situation of "uniform tracer but unqualified actual performance", and the evaluation results are more practically valuable. By plotting a standard curve to establish a linear relationship between cellulose ether content and water retention rate, and combining the water retention rate measurement data from multiple sampling points to calculate the coefficient of variation, accurate quantitative evaluation of mixing uniformity was achieved. The calculation method of the coefficient of variation is scientific, reliable, and highly repeatable. Compared with the traditional methyl violet tracer method, the normal use of the product is not affected after the quantitative evaluation of mixing uniformity is completed.

[0038] Figure 1 This is a flowchart illustrating a method for determining the mixing uniformity of mortar in one embodiment. It should be understood that, although... Figure 1 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise explicitly stated herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0039] In one embodiment, a device for determining the mixing uniformity of mortar (not shown) is provided, comprising: The memory is configured to store instructions; The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement the aforementioned method for determining the mixing uniformity of mortar.

[0040] The device for determining the mixing uniformity of mortar includes a processor and a memory. The processor contains a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be configured, and the method for determining the mixing uniformity of mortar can be implemented by adjusting the kernel parameters.

[0041] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0042] This application provides a storage medium storing a program that, when executed by a processor, implements the above-described method for determining the mixing uniformity of mortar.

[0043] This application provides a processor for running a program, wherein the program executes the above-described method for determining the mixing uniformity of mortar.

[0044] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown, the computer device includes a processor A01, a network interface A02, and a memory (not shown) connected via a system bus. The processor A01 provides computing and control capabilities. The memory includes internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01 and a computer program B02. The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 stored in the non-volatile storage medium A04. The network interface A02 is used for communication with external terminals via a network connection. When executed by the processor A01, the computer program B02 implements a method for determining the mixing uniformity of mortar.

[0045] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0046] This application provides a computer (electronic) device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of any of the above methods for determining the mixing uniformity of mortar.

[0047] This application also provides a computer program product that, when executed on a data processing device, is adapted to execute a program that initializes a method for determining the mixing uniformity of mortar.

[0048] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0049] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0050] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0051] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0052] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0053] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0054] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0055] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0056] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for determining the mixing uniformity of mortar, characterized in that, The method includes: Determine the quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar; Based on the quantitative relationship, a second threshold for the water retention rate variation coefficient is determined according to a first threshold for the target additive content variation coefficient. After the mortar to be tested is mixed, multiple samples distributed in different spatial locations are obtained from the mixed material. Obtain the second water retention rate of multiple samples; For all of the samples, determine the central tendency and dispersion of the second water retention rate; Based on the central tendency and the degree of dispersion, calculate the coefficient of variation of the current actual water retention rate of the mortar to be tested; The coefficient of variation of the actual water retention rate is compared with the second threshold, and the mixing uniformity of the mortar to be tested is determined based on the comparison result.

2. The method for determining the mixing uniformity of mortar according to claim 1, characterized in that, The quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar includes: Multiple sets of sample mortar materials are prepared, and each set of sample mortar materials is mixed evenly. The target additive content of each set of sample mortar materials is different, and the proportions of other components except for the target additive content are the same. Obtain the first water retention rate of mortar materials from multiple groups of samples; For all the sample mortar materials, a linear regression analysis was performed on the content of the target additive and the first water retention rate to obtain a quantitative relationship between the content of the target additive and the water retention rate of the mortar.

3. The method for determining the mixing uniformity of mortar according to claim 1, characterized in that, The method further includes, after determining the quantitative relationship between the content of the target additive in the mortar and the water retention rate of the mortar, obtaining a preset average content of the target additive, wherein the preset average content is the commonly designed dosage of the target additive under normal application conditions, and determining a second threshold for the coefficient of variation of the water retention rate based on the quantitative relationship and according to a preset first threshold for the coefficient of variation of the target additive content includes: Based on the preset average content and the quantitative relationship, the predicted water retention rate of the mortar is calculated; Based on the preset average content and the first threshold, the theoretical standard deviation of the target additive content is calculated; Based on the theoretical standard deviation and the quantitative relationship, the predicted standard deviation of the mortar water retention rate is calculated; The second threshold is determined based on the ratio of the predicted standard deviation value to the predicted water retention rate value.

4. The method for determining the mixing uniformity of mortar according to claim 3, characterized in that, The determination of the second threshold based on the ratio of the predicted standard deviation value to the predicted water retention rate value further includes: Obtain the preset operating error for the water retention rate test; The predicted standard deviation value is corrected based on the preset operating error; The second threshold is determined based on the ratio of the corrected standard deviation prediction value to the water retention rate prediction value.

5. The method for determining the mixing uniformity of mortar according to claim 1, characterized in that, The central tendency of the second water retention rate is defined by the average value of the second water retention rate of the multiple samples, and the dispersion is defined by the standard deviation of the second water retention rate of the multiple samples.

6. The method for determining the mixing uniformity of mortar according to claim 1, characterized in that, The step of comparing the actual water retention rate variation coefficient with a second threshold and determining whether the mixing uniformity of the mortar to be tested is qualified based on the comparison result includes: If the coefficient of variation of the actual water retention rate is less than or equal to the second threshold, the mixing uniformity of the mortar to be tested is determined to be qualified. If the coefficient of variation of the actual water retention rate is greater than the second threshold, it is determined that the mixing uniformity of the mortar to be tested is unqualified, and the mixing parameters are adjusted.

7. The method for determining the mixing uniformity of mortar according to claim 1, characterized in that, The process of mixing the mortar to be tested using a mixer, and obtaining multiple samples distributed at different spatial locations from the resulting mixture, includes: The mortar sample to be tested is obtained at multiple preset sampling points within the mixer, wherein the preset sampling points are set at the upper, middle and lower parts of the mixer, and each height includes at least two central sampling points and four edge sampling points.

8. The method for determining the mixing uniformity of mortar according to any one of claims 1 to 7, characterized in that, The mortar is a decorative mortar, and the target additive is a cellulose ether.

9. A device for determining the mixing uniformity of mortar, characterized in that, include: The memory is configured to store instructions; The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the method for determining the mixing uniformity of mortar according to any one of claims 1 to 8.

10. A machine-readable storage medium storing instructions thereon, characterized in that, When executed by a processor, this instruction causes the processor to be configured to perform the method for determining the mixing uniformity of mortar according to any one of claims 1 to 8.

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