Methods, apparatus, electronic equipment and storage media for detecting concrete erosion heterogeneity

Abstract

This application relates to a method, apparatus, electronic device, and storage medium for detecting the unevenness of concrete erosion. The method includes: acquiring at least one concrete sample; performing a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion; determining the degree of damage in each region of the concrete sample based on the first and second sound velocities; wherein the degree of damage includes minor, moderate, and severe damage; and conducting erosion performance testing on a target region with severe damage to determine the erosion unevenness result of the target region. Thus, by utilizing changes in sound velocity, changes in the internal structure of concrete can be intuitively and qualitatively reflected, accurately locating the damage status of different regions of the concrete; and by conducting erosion performance testing on a target region with severe damage to determine the erosion unevenness result, the uneven distribution of internal erosion can be discovered, providing a reliable basis for engineering maintenance and repair decisions.

Description

Technical Field

[0001] This application relates to the field of engineering material testing technology, and in particular to a method, apparatus, electronic device and storage medium for detecting uneven erosion of concrete. Background Technology

[0002] Sulfate ion erosion of concrete in a sulfate environment is one of the key factors affecting structural durability. The internal structural characteristics of concrete, such as porosity and aggregate distribution, significantly influence the sulfate erosion process, leading to strong regional differences in erosion damage. This non-uniform distribution of erosion damage easily induces stress concentration in service structures, accelerating structural deterioration and significantly increasing the risk of structural failure.

[0003] Currently, most methods for detecting and evaluating sulfate damage in concrete focus on the macroscopic description of overall structural performance degradation, and generally use averaged indicators for damage assessment, severely neglecting the spatial heterogeneity of concrete degradation. This evaluation method fails to accurately reflect the true damage state of the structure, leading to significant biases in the assessment of actual structural damage and degradation risks. It cannot provide a reliable basis for engineering maintenance and repair decisions, becoming a bottleneck restricting the development of concrete structure durability assessment technology.

[0004] Therefore, how to achieve rapid and precise analysis and evaluation of the unevenness of internal erosion damage in concrete is an urgent problem to be solved. Summary of the Invention

[0005] Therefore, it is necessary to provide a method, apparatus, electronic device, and storage medium for detecting the unevenness of concrete erosion in order to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a method for detecting uneven erosion in concrete, the method comprising:

[0007] Obtain at least one concrete sample;

[0008] The concrete sample was subjected to sound velocity testing to determine the first sound velocity before erosion and the second sound velocity after erosion.

[0009] Based on the first and second sound velocities, the degree of damage in each region of the concrete sample is determined; wherein the degree of damage includes mild damage, moderate damage, and severe damage.

[0010] The erosion performance of the target area with the degree of severe damage is tested to determine the erosion unevenness of the target area.

[0011] In one embodiment, the step of performing a sound velocity test on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion includes:

[0012] The concrete sample was divided into multiple acoustic testing surfaces;

[0013] An initial sound velocity test was performed on each of the acoustic measurement surfaces in the concrete sample to obtain the first sound velocity.

[0014] The concrete sample was subjected to a sulfate wet-dry cycle erosion test to obtain the test sample.

[0015] The second sound velocity is obtained by testing the damage sound velocity on each of the acoustic measurement surfaces in the experimental sample.

[0016] In one embodiment, the acoustic surface includes N equally spaced test lines; where N is a positive integer; determining the degree of damage in each region of the concrete sample based on the first and second sound velocities includes:

[0017] Based on the first sound velocity corresponding to the j-th test line, determine the j-th initial dynamic elastic modulus before erosion; wherein, j is a positive integer and j is less than or equal to N;

[0018] Based on the second sound velocity corresponding to the test line, determine the dynamic elastic modulus of the j-th damage after erosion;

[0019] The damage range of the acoustic surface is determined based on the first to Nth initial dynamic elastic moduli and the first to Nth damaged dynamic elastic moduli.

[0020] Based on the damage range, determine the damage parameter range;

[0021] The degree of damage in each region of the acoustic surface is determined by matching the first to Nth erosion damage indices with the damage parameter range.

[0022] The degree of damage in each region of the concrete sample is determined based on the degree of damage in each region of each acoustic surface.

[0023] In one embodiment, determining the damage range of the acoustic surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damaged dynamic elastic moduli includes:

[0024] The j-th erosion damage index is determined based on the j-th initial dynamic elastic modulus and the j-th damage dynamic elastic modulus.

[0025] The damage range is determined based on the maximum and minimum values ​​of the first to Nth erosion damage indices of the acoustic surface.

[0026] In one embodiment, the step of performing erosion performance testing on the target area where the damage level is severe, and determining the erosion unevenness result of the target area, includes:

[0027] The initial structural image of the concrete sample before erosion, the damaged structural image after erosion, the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment are obtained; wherein, the critical sulfate concentration represents the maximum sulfate ion content that a unit of concrete can support and consume.

[0028] The current erosion depth of the concrete sample is determined based on the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment.

[0029] The extent of erosion in the concrete sample is determined based on the current erosion depth.

[0030] Extract the initial target structure image before erosion and the target damage structure image after erosion corresponding to the erosion range.

[0031] Based on the initial target structural image and the target damaged structural image, the average porosity damage index and the target porosity damage index of the target region are calculated respectively.

[0032] The erosion heterogeneity result is determined based on the average pore damage index and the target pore damage index.

[0033] In one embodiment, the step of calculating the average porosity damage index and the target porosity damage index of the target region based on the initial target structural image and the target damaged structural image, respectively, includes:

[0034] Based on the initial structural image of the target, determine the first porosity within the erosion range before erosion and the second porosity of the target region;

[0035] Based on the target damaged structure image, determine the third porosity within the erosion range and the fourth porosity of the target region after erosion;

[0036] The average pore damage index is determined based on the first porosity and the third porosity.

[0037] The target pore damage index is determined based on the first porosity, the second porosity, and the fourth porosity.

[0038] In one embodiment, the method further includes:

[0039] In response to a request to display the erosion detection interface, the erosion detection interface is displayed; wherein, the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be tested;

[0040] When a selection operation for a target concrete sample is received through the sample selection control, the degree of damage and / or the erosion heterogeneity result of each region in the target concrete sample are displayed according to the selection operation.

[0041] Secondly, this application also provides a device for detecting uneven concrete erosion, the device comprising:

[0042] Acquisition module, used to acquire at least one concrete sample;

[0043] An ultrasonic testing module is used to test the sound velocity of the concrete sample to determine the first sound velocity before erosion and the second sound velocity after erosion.

[0044] The determination module is used to determine the degree of damage in each region of the concrete sample based on the first sound velocity and the second sound velocity; wherein the degree of damage includes mild damage, moderate damage and severe damage;

[0045] The performance testing module is used to perform erosion performance testing on the target area where the damage level is severe, and to determine the erosion unevenness result of the target area.

[0046] Thirdly, this application also provides an electronic device, including a processor and a memory for storing a computer program of the processor; wherein the processor is configured to, when executing the computer program, implement the steps of the method described in any embodiment of this application.

[0047] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the methods described in any embodiment of this application.

[0048] The aforementioned method for detecting uneven concrete erosion has several advantages. First, by acquiring concrete samples and conducting sound velocity tests before and after erosion, the changes in sound velocity can intuitively and qualitatively reflect the changes in the internal structure of the concrete. Classifying the degree of damage into mild, moderate, and severe allows for more precise localization of damage in different areas of the concrete compared to vague and general assessment methods. Second, severely damaged areas are often the most vulnerable parts of the structure and most prone to safety issues. By conducting erosion performance tests on severely damaged areas to determine their uneven erosion distribution, the method can identify the uneven distribution of internal erosion, providing a reliable basis for engineering maintenance and repair decisions. Furthermore, it eliminates the need for quantitative analysis of all damaged areas in the concrete sample, saving resources and improving detection efficiency. Timely detection of severely damaged areas and uneven erosion in concrete structures allows for proactive preventative measures, reducing safety accidents caused by escalating structural damage and protecting life and property. Attached Figure Description

[0049] Figure 1 This is a schematic flowchart illustrating a method for detecting uneven erosion of concrete according to an exemplary embodiment.

[0050] Figure 2 This is a schematic diagram illustrating the division of acoustic surfaces in a concrete sample according to an exemplary embodiment.

[0051] Figure 3 This is a schematic diagram of test lines on an acoustic measurement surface according to an exemplary embodiment;

[0052] Figure 4 This is a schematic diagram illustrating the division of the acoustic measurement surface region according to an exemplary embodiment;

[0053] Figure 5 This is a schematic image of a damaged structure after erosion, according to an exemplary embodiment.

[0054] Figure 6 This is a schematic diagram of the partitioning of the severely damaged zone of a concrete specimen according to an exemplary embodiment.

[0055] Figure 7 This is a schematic diagram illustrating the degree of damage in each region of each acoustic measurement surface according to an exemplary embodiment;

[0056] Figure 8 This is a schematic diagram illustrating the uneven erosion of a concrete sample according to an exemplary embodiment;

[0057] Figure 9 This is a structural block diagram of a concrete erosion unevenness detection device according to an exemplary embodiment;

[0058] Figure 10This is an internal structural diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the application. The terms "first," "second," and "third" in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of those features. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0060] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0061] In some embodiments, the concrete erosion non-uniformity detection method provided in this application can be applied to electronic devices or cloud servers. The electronic device can be any mobile terminal or fixed terminal. The terminal can be a device that provides voice and / or data connectivity to the user. For example, the terminal can be an IoT terminal, such as a sensor device, a mobile phone or so-called "cellular" phone, and a computer with an IoT terminal, for example, a fixed, portable, pocket-sized, handheld, or computer-embedded device. The cloud server can be any virtualized computing resource or physical server cluster. The server can be a platform that provides on-demand, scalable computing, storage, networking, and application services to the user.

[0062] In some embodiments, such as Figure 1 As shown, a method for detecting uneven erosion in concrete is provided, the method comprising the following steps:

[0063] S101, Obtain at least one concrete sample.

[0064] In one embodiment, concrete samples of a predetermined proportion are prepared according to a predetermined concrete mix design. The predetermined proportion of concrete samples can be cylindrical samples with a diameter of 5 cm and a height of 10 cm, or cubic samples with a length, width and height of 10 cm. Standard curing is carried out in accordance with the "Standard for Test Methods of Physical and Mechanical Properties of Concrete" GB / T 50081-2019. After curing for 28 days, the samples are taken out of the curing room, and residual moisture and dirt on the surface of the concrete samples are cleaned. After drying in an oven, the samples are cooled to room temperature to ensure that the concrete samples are dry and clean.

[0065] S102, Perform a sound velocity test on the concrete sample to determine the first sound velocity before erosion and the second sound velocity after erosion.

[0066] In some embodiments, ultrasonic testing technology, as a core testing technology in the field of non-destructive testing, is based on the theory of sound wave propagation. A signal generator inside the testing instrument (such as a non-metallic ultrasonic tester) generates an electrical signal of a specific frequency and waveform. This electrical signal is transmitted to an ultrasonic transducer connected to the instrument, where it is converted into ultrasonic waves based on the piezoelectric effect and emitted towards the concrete component under test. The ultrasonic waves propagate through the concrete medium and are captured by a receiving probe. By accurately analyzing the test parameters such as the sound velocity, amplitude, and frequency of the ultrasonic waves, the strength grade and internal integrity performance of the concrete material can be effectively inferred. After concrete is subjected to sulfate attack, the propagation of internal cracks alters its internal structure, and the sound velocity test parameters of the medium during ultrasonic testing change accordingly. By comparing the first sound velocity before attack and the second sound velocity after attack, qualitative damage detection of the corresponding concrete properties can be achieved.

[0067] In some embodiments, performing sound velocity testing on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion includes:

[0068] The concrete sample was divided into multiple acoustic testing surfaces;

[0069] An initial sound velocity test was performed on each of the acoustic measurement surfaces in the concrete sample to obtain the first sound velocity.

[0070] The concrete sample was subjected to a sulfate wet-dry cycle erosion test to obtain the test sample.

[0071] The second sound velocity is obtained by testing the damage sound velocity on each of the acoustic measurement surfaces in the experimental sample.

[0072] In one embodiment, such as Figure 2As shown, the concrete sample is a cylinder with a height of 10 cm. Acoustic testing surfaces are arranged along the axis of the cylinder, for example, four acoustic testing surfaces H1, H2, H3, and H4 are arranged at 2 cm intervals. Before acoustic testing, butter or petroleum jelly is used as a coupling agent to evenly coat each acoustic testing surface. A non-metallic ultrasonic instrument is used to test each acoustic testing surface in the concrete sample layer by layer in sequence to obtain multiple first sound velocities. After the initial test, the residual coupling agent on the surface of the concrete sample is cleaned, and a sulfate wet-dry cycle erosion test is conducted according to the sulfate erosion resistance test method in GB / T 50082-2024 "Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete". After the erosion test, the damage sound velocity is tested on each acoustic testing surface of the experimental sample to obtain multiple second sound velocities.

[0073] S103, based on the first sound velocity and the second sound velocity, determine the degree of damage in each region of the concrete sample; wherein the degree of damage includes mild damage, moderate damage and severe damage.

[0074] In some embodiments, the acoustic testing surface includes N equally spaced test lines; N is a positive integer; determining the degree of damage in each region of the concrete sample based on the first sound velocity and the second sound velocity includes:

[0075] Based on the first sound velocity corresponding to the j-th test line, determine the j-th initial dynamic elastic modulus before erosion; wherein, j is a positive integer and j is less than or equal to N;

[0076] Based on the second sound velocity corresponding to the test line, determine the dynamic elastic modulus of the j-th damage after erosion;

[0077] The damage range of the acoustic surface is determined based on the first to Nth initial dynamic elastic moduli and the first to Nth damaged dynamic elastic moduli.

[0078] Based on the damage range, determine the damage parameter range;

[0079] The degree of damage in each region of the acoustic surface is determined by matching the first to Nth erosion damage indices with the damage parameter range.

[0080] The degree of damage in each region of the concrete sample is determined based on the degree of damage in each region of each acoustic surface.

[0081] In one embodiment, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the test lines on the acoustic measurement surface. An arbitrary location is selected as the measurement starting point M1 on the first acoustic measurement surface. 1 Following a clockwise direction, set up measurement points M1 on the acoustic surface at equal intervals according to a preset number.2 M1 3 M1 18 The preset number of measurement points can be changed, for example, it can be 24, 30, etc.; based on two measurement points spaced 180° apart, nine test lines L1, L2, ..., L9 are formed passing through the center of the first acoustic surface; for other acoustic surfaces, the measurement points and test lines are marked according to the circumferential positions corresponding to the measurement points on the first acoustic surface. Using the test lines as the center lines, the acoustic surface is divided into multiple regions at equal intervals based on a predetermined number of measurement points, for example, ... Figure 4 As shown, Figure 4 This is a schematic diagram of the division of the acoustic measurement surface area, with a predetermined quantity of 18.

[0082] In one embodiment, during the sound velocity test, the transducer center is aligned with the measurement points at both ends of the test line, and initial sound measurement is performed on each test line in sequence to obtain the first sound velocity corresponding to multiple test lines.

[0083] In this embodiment, when ultrasound propagates in solid materials such as concrete samples, the propagation speed of the longitudinal wave (compression wave) is closely related to the dynamic elastic modulus, density, and Poisson's ratio of the material; the dynamic elastic modulus can be determined by inversely using the longitudinal wave velocity of the concrete.

[0084] In some embodiments, determining the damage range of the acoustic surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli includes:

[0085] The j-th erosion damage index is determined based on the j-th initial dynamic elastic modulus and the j-th damage dynamic elastic modulus.

[0086] The damage range is determined based on the maximum and minimum values ​​of the first to Nth erosion damage indices of the acoustic surface.

[0087] For example, an electronic device can determine the erosion damage index based on the j-th initial dynamic elastic modulus and the j-th damaged dynamic elastic modulus; where j is a positive integer; one method for calculating the erosion damage index is as follows:

[0088] ;

[0089] in, Indicates the initial dynamic elastic modulus of the j-th acoustic surface; Indicates the dynamic elastic modulus of the j-th damage in the i-th acoustic surface; Indicates the first sound velocity corresponding to the j-th test line in the i-th acoustic measurement surface; Indicates the second sound velocity corresponding to the j-th test line in the i-th acoustic measurement surface.

[0090] In one embodiment, the damage range is determined based on the maximum and minimum values ​​of the first to Nth erosion damage indices in the i-th acoustic surface. For example, one method for calculating the damage range is as follows:

[0091] ;

[0092] in, The maximum value in the set of indicators of erosion damage; The minimum value in the set of indicators of erosion damage.

[0093] In one embodiment, the electronic device compares the damage range with a preset range to determine the measurement surface type of each acoustic measurement surface; sorts the 1st to Nth (all) erosion damage indicators in the same measurement surface in a predetermined order (e.g., from smallest to largest), and divides the damage parameter intervals proportionally according to the measurement surface type; matches the jth erosion damage indicator with the damage parameter interval to determine the damage degree of the area corresponding to the jth erosion damage indicator; and so on, to determine the damage degree of each area in the acoustic measurement surface.

[0094] For example, as shown in Table 1 below, Table 1 is a schematic table of damage area division. If the damage range of the first acoustic surface is between 0.5 and 1, then the first acoustic surface can be determined as a bipartite surface, and the damage area within the first acoustic surface includes a lightly damaged area and a moderately damaged area. The electronic device can match the j-th erosion damage index with the damage parameter range characterized by each damage area to determine the damage degree of the successfully matched damage area as the damage degree of the area corresponding to the j-th erosion damage index.

[0095] Table 1

[0096]

[0097] In one embodiment, the electronic device can evaluate the overall heterogeneity of the concrete sample using a superposition method, as shown in Table 2 below. Table 2 is a schematic table of damage area assignment. Damage assignments are sequentially superimposed on the test lines corresponding to the same position (with the same numbering principle) in multiple acoustic surfaces to obtain the target assignment. The target damage area is divided according to the multiple target assignments included in the concrete sample, as shown in Table 3 below. Table 3 is a schematic table of target damage area division. The electronic device can determine the degree of damage in the three-dimensional region corresponding to the test line at the same position in multiple acoustic surfaces of the concrete sample based on the target assignment and the target damage area.

[0098] Table 2

[0099]

[0100] Table 3

[0101]

[0102] In this way, by dividing the concrete sample into multiple acoustic testing surfaces, the previous extensive method of testing the entire sample is changed, and sound velocity data can be obtained from different angles and regions. In large concrete components, different parts are subjected to different stresses and environmental influences. By dividing the sample into acoustic testing surfaces, the spatial variation of sound velocity inside the concrete can be captured more precisely, thus comprehensively and accurately reflecting the performance status of each region of the concrete sample and avoiding the omission of local defects due to overall testing.

[0103] S104, perform erosion performance testing on the target area with the degree of severe damage to determine the erosion unevenness result of the target area.

[0104] In one embodiment, the electronic device can screen out the target area of ​​severe damage (i.e. the key erosion damage area) through multi-point ultrasonic testing, and perform erosion performance testing on the target area of ​​severe damage to determine the structural characteristic index, damage characteristic index and protection characteristic index of the target area; based on at least one of the structural characteristic index, damage characteristic index and protection characteristic index, the erosion non-uniformity result of the target area can be determined.

[0105] In one embodiment, the electronic device can screen out the target area of ​​severe damage through multi-point ultrasonic testing, and use X-CT to precisely measure the erosion damage of the target area of ​​severe damage, for example, by precisely analyzing the pore content of the target area of ​​severe damage; thus, by combining ultrasonic testing and X-CT scanning, a rapid and precise analysis and evaluation of the non-uniformity of erosion damage inside concrete can be achieved.

[0106] The aforementioned method for detecting uneven concrete erosion has several advantages. First, by acquiring concrete samples and conducting sound velocity tests before and after erosion, the changes in sound velocity can intuitively and qualitatively reflect the changes in the internal structure of the concrete. Classifying the degree of damage into mild, moderate, and severe allows for more precise localization of damage in different areas of the concrete compared to vague and general assessment methods. Second, severely damaged areas are often the most vulnerable parts of the structure and most prone to safety issues. By conducting erosion performance tests on severely damaged areas to determine their uneven erosion distribution, the method can identify the uneven distribution of internal erosion, providing a reliable basis for engineering maintenance and repair decisions. Furthermore, it eliminates the need for quantitative analysis of all damaged areas in the concrete sample, saving resources and improving detection efficiency. Timely detection of severely damaged areas and uneven erosion in concrete structures allows for proactive preventative measures, reducing safety accidents caused by escalating structural damage and protecting life and property.

[0107] In some embodiments, the step of performing erosion performance testing on the target area where the damage level is severe, and determining the erosion unevenness result of the target area, includes:

[0108] The initial structural image of the concrete sample before erosion, the damaged structural image after erosion, the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment are obtained; wherein, the critical sulfate concentration represents the maximum sulfate ion content that a unit of concrete can support and consume.

[0109] The current erosion depth of the concrete sample is determined based on the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment.

[0110] The extent of erosion in the concrete sample is determined based on the current erosion depth.

[0111] Extract the initial target structure image before erosion and the target damage structure image after erosion corresponding to the erosion range.

[0112] Based on the initial target structural image and the target damaged structural image, the average porosity damage index and the target porosity damage index of the target region are calculated respectively.

[0113] The erosion heterogeneity result is determined based on the average pore damage index and the target pore damage index.

[0114] In one embodiment, the electronic device can acquire an initial structural image of the concrete sample using X-CT scanning technology before erosion; acquire a damaged structural image of the sample after erosion using X-CT scanning technology; estimate the diffusion range of the erosion source during erosion based on Fick's second law, and delineate the erosion damage image area; determine the current erosion depth of the concrete sample after erosion for time t based on the concrete diffusion coefficient, critical sulfate concentration, and sulfate ion content in the external environment; determine the erosion range in the concrete sample based on the current erosion depth; extract the target initial structural image within the erosion range before erosion from the initial structural image, and extract the target damaged structural image within the erosion range after erosion from the damaged structural image; determine the porosity of the concrete sample based on the target initial structural image and the target damaged structural image; calculate the average porosity damage index and the target porosity damage index of the target area with severe damage based on the porosity, and determine the heterogeneity result of the target area based on the average porosity damage index and the target porosity damage index.

[0115] For example, such as Figure 5 As shown, Figure 5This is a schematic diagram of a damaged structure after erosion. A method for calculating the current erosion depth of a concrete sample after erosion for time t is as follows: ;in, Indicator of concrete diffusion coefficient; Indicator of critical sulfate concentration; It indicates the sulfate ion content in the external environment.

[0116] In one embodiment, the electronic device can determine a first ratio based on the ratio of the target pore damage index to the average pore damage index; and compare the first ratio with a reference threshold to determine the erosion inhomogeneity result.

[0117] For example, one way to determine the first ratio is as follows: ;in, Indicators of target pore damage; Indicator of average pore damage.

[0118] For example, when the first ratio is greater than or equal to 2, the erosion heterogeneity result can be considered as extremely severe damage heterogeneity; when the first ratio is greater than or equal to 1.5 and less than 2, the erosion heterogeneity result can be considered as severe damage heterogeneity; when the first ratio is greater than or equal to 1 and less than 1.5, the erosion heterogeneity result can be considered as relatively severe damage heterogeneity.

[0119] In this embodiment, structural images before and after erosion are extracted, and pore features before and after damage are calculated to quantify the degree of sample damage. Based on the concrete erosion diffusion law, the erosion range is delineated using the current erosion depth as a benchmark. Simultaneously, damage evaluation analysis based on ultrasonic testing is combined to achieve precise, directional analysis of pore features in locally highly damaged areas. By comparing the pore damage of locally highly damaged areas with that of the entire sample, accurate quantitative characterization of damage inhomogeneity is achieved, which is beneficial for subsequent accurate early warning of structural risks.

[0120] In some embodiments, calculating the average porosity damage index and the target porosity damage index of the target region based on the initial target structural image and the target damaged structural image respectively includes:

[0121] Based on the initial structural image of the target, determine the first porosity within the erosion range before erosion and the second porosity of the target region;

[0122] Based on the target damaged structure image, determine the third porosity within the erosion range and the fourth porosity of the target region after erosion;

[0123] The average pore damage index is determined based on the first porosity and the third porosity.

[0124] The target pore damage index is determined based on the first porosity, the second porosity, and the fourth porosity.

[0125] For example, one method for determining the average pore damage index is as follows: ;in, Indicates the first porosity; Indicates the third porosity.

[0126] In one embodiment, the electronic device can divide the target area into two centrally symmetrical sub-regions and calculate the target porosity damage index corresponding to each sub-region. One method for determining the target porosity damage index is as follows: ;in, Indicates the first porosity; Indicates the second porosity; Indicating fourth porosity

[0127] For example, such as Figure 6 As shown, Figure 6 This is a schematic diagram showing the partitioning of the severely damaged zone in a concrete sample. The target area (severely damaged zone) L8 is divided into two centrally symmetrical sub-regions L... 81 and L 82 .

[0128] In this embodiment, the average porosity damage index can characterize the average damage across the entire erosion range, while the target porosity damage index can focus on the target area with severe damage, making it easier to detect the degree of local degradation and unevenness, thus achieving accurate measurement of erosion unevenness and tracing back the causes of unevenness.

[0129] In some embodiments, the method further includes:

[0130] In response to a request to display the erosion detection interface, the erosion detection interface is displayed; wherein, the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be tested;

[0131] When a selection operation for a target concrete sample is received through the sample selection control, the degree of damage and / or the erosion heterogeneity result of each region in the target concrete sample are displayed according to the selection operation.

[0132] In one embodiment, the degree of damage and / or the erosion heterogeneity of each region in the target concrete specimen can be presented in text, graph, curve and / or list form.

[0133] In one embodiment, the erosion detection interface includes multiple concrete samples. When a user wants to view the erosion heterogeneity results of a specific concrete sample, they can select it by clicking on the sample selection control, thereby viewing the degree of damage in each area of ​​the selected target concrete sample in the erosion detection interface. If there is a severely damaged target area in the target concrete sample, the user can further choose whether to view the erosion heterogeneity results of the target area. It can also support the simultaneous selection of multiple samples to achieve a lateral comparison of erosion heterogeneity.

[0134] In this embodiment of the application, a visual erosion detection interface allows users to easily select the concrete sample to be tested and view the degree of damage and erosion unevenness results in each area, making it convenient for users to intuitively analyze the erosion unevenness of the concrete sample.

[0135] In this application embodiment, specific examples are provided below in conjunction with any of the above embodiments:

[0136] Specific example 1:

[0137] 1) Prepare concrete samples according to the predetermined mix proportions, as shown in Table 4 below. Table 4 is a schematic table of concrete mix proportions.

[0138] Table 4

[0139]

[0140] The concrete sample was divided into four acoustic testing surfaces, and the concrete sample was subjected to 180 cycles of strong wet-dry cycling with a 10% Na2SO4 solution. The specific cycling operation method was referred to GB / T 50082-2024 "Standard for Test Methods of Long-Term Performance and Durability of Concrete" to obtain the test sample.

[0141] 2) Based on the experimental specimens, the erosion damage index of each test line in each acoustic test surface was determined, as shown in Table 5 below. Table 5 is a schematic table of erosion damage index of the experimental specimens.

[0142] Table 5

[0143]

[0144] 3) Based on the erosion damage index of each test line in each acoustic surface, calculate the damage range of each acoustic surface and determine the surface type of each acoustic surface; as shown in Table 6 below, Table 6 is a schematic table of erosion damage index and surface type of each acoustic surface.

[0145] Table 6

[0146]

[0147] 4) Sort all erosion damage indicators in the same measurement surface in a predetermined order (e.g., from smallest to largest), and divide the damage parameter ranges proportionally according to the measurement surface type, as shown in Table 7 below. Table 7 is a schematic table of damage parameter ranges for each acoustic measurement surface.

[0148] Table 7

[0149]

[0150] 5) Match each erosion damage index with the damage parameter range to determine the damage degree of the corresponding area for each erosion damage index, that is, determine the damage degree of each area in the acoustic surface; for example... Figure 7 As shown, Figure 7 This is a schematic diagram showing the degree of damage in each region of each acoustic surface.

[0151] 6) The damage values ​​of the test lines with the same number on each acoustic surface are superimposed according to the superposition method to determine the target value; as shown in Table 8 below, Table 8 is a schematic table for calculating the target value.

[0152] Table 8

[0153]

[0154] 7) Divide the concrete sample into target damage areas based on multiple target values, and determine the damage degree of the three-dimensional region corresponding to the test line at the same location on multiple acoustic surfaces of the concrete sample, i.e., the damage degree of each region in the concrete sample, based on the target values ​​and target damage areas; for example... Figure 8 As shown, Figure 8 This is a schematic diagram of the uneven erosion of a concrete sample.

[0155] 8) Obtain initial structural images of the concrete sample before erosion and damaged structural images after erosion, and calculate the concrete diffusion coefficient based on the water-cement ratio. It is 6.42*10 -13 m 2 / s, critical sulfate concentration 339 mol / m 3 Sulfate ion content in the external environment 705 mol / m 3 The erosion time t is 180 days (6220800 s).

[0156] 9) Determine the current erosion depth X of the concrete sample based on the concrete diffusion coefficient, critical sulfate concentration, and sulfate ion content in the external environment. D =4.1mm.

[0157] 10) The total volume of the concrete sample was 196350 mm². 3As shown in Table 9 below, Table 9 is a schematic table of pore volume; based on the target value, it can be determined that there is a severely damaged zone L8 in the concrete sample, which is the target area; such as Figure 6 As shown, the target region is divided into two centrally symmetrical sub-regions L. 81 and L 82 .

[0158] Table 9

[0159]

[0160] 11) Determine the average pore damage index of the concrete specimen. The target porosity damage index is 2.48, and the target porosity damage indexes of the two sub-regions in the target area are respectively... Based on the target pore damage index and the average pore damage index, the first ratio of the two sub-regions can be determined as follows: Then the sub-region L in the target region can be determined. 81 The erosion heterogeneity results in severe damage heterogeneity and sub-region L 82 The erosion heterogeneity results in severe damage heterogeneity.

[0161] In this embodiment, on the one hand, by acquiring concrete samples and conducting sound velocity tests before and after erosion, the changes in sound velocity can intuitively and qualitatively reflect the changes in the internal structure of the concrete. Classifying the degree of damage into mild, moderate, and severe allows for more precise localization of damage in different areas of the concrete compared to vague and general assessment methods. On the other hand, severely damaged areas are often the most vulnerable parts of the structure and most prone to safety issues. By conducting erosion performance tests on target areas with severe damage, determining their erosion heterogeneity results, the uneven distribution of internal erosion can be identified, providing a reliable basis for engineering maintenance and repair decisions. Furthermore, it eliminates the need for quantitative analysis of all damaged areas in the concrete sample, saving resources and improving testing efficiency. Moreover, timely detection of severely damaged areas and erosion heterogeneity in concrete structures allows for proactive preventative measures, reducing safety accidents caused by escalating structural damage and protecting life and property.

[0162] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0163] Based on the same inventive concept, this application also provides a concrete erosion unevenness detection device for implementing the concrete erosion unevenness detection method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more concrete erosion unevenness detection device embodiments provided below can be found in the limitations of the concrete erosion unevenness detection method described above, and will not be repeated here.

[0164] In one embodiment, such as Figure 9 As shown, a device for detecting uneven concrete erosion is provided, the device comprising:

[0165] Acquisition module 10 is used to acquire at least one concrete sample;

[0166] The ultrasonic testing module 20 is used to test the sound velocity of the concrete sample to determine the first sound velocity before erosion and the second sound velocity after erosion.

[0167] The determination module 30 is used to determine the degree of damage in each region of the concrete sample based on the first sound velocity and the second sound velocity; wherein the degree of damage includes mild damage, moderate damage and severe damage;

[0168] The performance testing module 40 is used to perform erosion performance testing on the target area where the damage level is severe, and to determine the erosion unevenness result of the target area.

[0169] In one embodiment, the ultrasonic detection module 20 includes:

[0170] A dividing unit is used to divide the concrete sample into multiple acoustic testing surfaces;

[0171] The first acoustic measurement unit is used to perform initial acoustic velocity testing on each of the acoustic measurement surfaces in the concrete sample to obtain the first acoustic velocity.

[0172] The erosion test unit is used to conduct sulfate wet-dry cycle erosion tests on the concrete sample to obtain the test sample.

[0173] The second acoustic measurement unit is used to perform damage sound velocity tests on each of the acoustic measurement surfaces in the experimental sample to obtain the second sound velocity.

[0174] In one embodiment, the acoustic measurement surface includes N equally spaced test lines; where N is a positive integer; the determining module 30 includes:

[0175] The first calculation unit is used to determine the j-th initial dynamic elastic modulus before erosion based on the first sound velocity corresponding to the j-th test line; wherein, j is a positive integer and j is less than or equal to N;

[0176] The second calculation unit is used to determine the dynamic elastic modulus of the j-th damage after erosion based on the second sound velocity corresponding to the test line.

[0177] The third calculation unit is used to determine the damage range of the acoustic surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damage dynamic elastic moduli.

[0178] The fourth calculation unit is used to determine the damage parameter range based on the damage range.

[0179] The first determining unit is used to match the first to Nth erosion damage indicators with the damage parameter range to determine the degree of damage in each region of the acoustic surface.

[0180] The second determining unit is used to determine the degree of damage in each region of the concrete sample based on the degree of damage in each region of each acoustic surface.

[0181] In one embodiment, the first determining unit is configured to perform at least one of the following steps:

[0182] The j-th erosion damage index is determined based on the j-th initial dynamic elastic modulus and the j-th damage dynamic elastic modulus.

[0183] The damage range is determined based on the maximum and minimum values ​​of the first to Nth erosion damage indices of the acoustic surface.

[0184] In one embodiment, the performance detection module 40 includes:

[0185] The acquisition unit is used to acquire the initial structural image of the concrete sample before erosion, the damaged structural image after erosion, the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; wherein, the critical sulfate concentration characterizes the maximum sulfate ion content that a unit of concrete can support and consume.

[0186] The depth determination unit is used to determine the current erosion depth of the concrete sample based on the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment.

[0187] The range determination unit is used to determine the erosion range in the concrete sample based on the current erosion depth.

[0188] The extraction unit is used to extract the initial target structure image before erosion and the target damage structure image after erosion corresponding to the erosion range.

[0189] The index calculation unit is used to calculate the average porosity damage index and the target porosity damage index of the target region based on the initial target structure image and the target damaged structure image, respectively.

[0190] The non-uniformity determination unit is used to determine the erosion non-uniformity result based on the average pore damage index and the target pore damage index.

[0191] In one embodiment, the indicator calculation unit is configured to perform the following steps:

[0192] Based on the initial structural image of the target, determine the first porosity within the erosion range before erosion and the second porosity of the target region;

[0193] Based on the target damaged structure image, determine the third porosity within the erosion range and the fourth porosity of the target region after erosion;

[0194] The average pore damage index is determined based on the first porosity and the third porosity.

[0195] The target pore damage index is determined based on the first porosity, the second porosity, and the fourth porosity.

[0196] In one embodiment, the apparatus further includes:

[0197] The display module is used to display the erosion detection interface in response to a display request; wherein the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be tested.

[0198] The display module is used to display the degree of damage and / or the erosion heterogeneity result of each region in the target concrete sample according to the selection operation when a selection operation for the target concrete sample is received through the sample selection control.

[0199] Each module in the above-mentioned concrete erosion unevenness detection device can be implemented in whole or in part through software, hardware and their combination. Each module can be embedded in the processor of the electronic device in hardware form or independent of the processor, or it can be stored in the memory of the electronic device in software form, so that the processor can call and execute the corresponding operations of each module.

[0200] In one embodiment, an electronic device is provided, the internal structure of which can be shown as follows: Figure 10 As shown, the electronic device includes a processor, memory, communication interface, display unit, and input device connected via a method bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores operating methods and computer programs. The internal memory provides an environment for the operation of the operating methods and computer programs stored in the non-volatile storage medium. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements an image processing method. The display screen can be a liquid crystal display (LCD) or an e-ink display. The input device can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the device's casing, or an external keyboard, touchpad, or mouse.

[0201] Those skilled in the art will understand that Figure 10 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 electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0202] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0203] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps performed by the processor of the electronic device of any of the above.

[0204] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0205] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, compilable logic units, quantum computing-based data processing logic units, etc., and are not limited to these.

[0206] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0207] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting uneven erosion in concrete, characterized in that, The method includes: Obtain at least one concrete sample; The concrete sample is subjected to sound velocity testing to determine a first sound velocity before erosion and a second sound velocity after erosion; wherein, the sound velocity testing of the concrete sample to determine the first sound velocity before erosion and the second sound velocity after erosion includes: dividing the concrete sample into multiple sound measurement surfaces; performing initial sound velocity testing on each of the sound measurement surfaces in the concrete sample to obtain the first sound velocity; conducting a sulfate wet-dry cycle erosion experiment on the concrete sample to obtain an experimental sample; and performing damage sound velocity testing on each of the sound measurement surfaces in the experimental sample to obtain the second sound velocity. Based on the first and second sound velocities, the degree of damage in each region of the concrete sample is determined; wherein the degree of damage includes mild damage, moderate damage, and severe damage; the acoustic testing surface includes N equally spaced test lines; where N is a positive integer; determining the degree of damage in each region of the concrete sample based on the first and second sound velocities includes: determining the j-th initial dynamic elastic modulus before erosion according to the first sound velocity corresponding to the j-th test line; wherein j is a positive integer and j is less than or equal to N; determining the j-th damaged dynamic elastic modulus after erosion according to the second sound velocity corresponding to the test line; determining the damage range of the acoustic testing surface according to the 1st to Nth initial dynamic elastic moduli and the 1st to Nth damaged dynamic elastic moduli; determining the damage parameter range according to the damage range; matching the 1st to Nth erosion damage indices with the damage parameter range to determine the degree of damage in each region of the acoustic testing surface; and determining the degree of damage in each region of the concrete sample according to the degree of damage in each region of each acoustic testing surface. The erosion performance of the target area with the severe damage level is tested to determine the erosion unevenness of the target area. This process includes: acquiring an initial structural image of the concrete sample before erosion, a damaged structural image after erosion, the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; wherein the critical sulfate concentration characterizes the maximum sulfate ion content that a unit of concrete can support and consume; determining the current erosion depth of the concrete sample based on the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; determining the erosion range within the concrete sample based on the current erosion depth; extracting the initial target structural image before erosion and the damaged target structural image after erosion corresponding to the erosion range; calculating the average porosity damage index and the target porosity damage index of the target area based on the initial target structural image and the damaged target structural image; and determining the erosion unevenness result based on the average porosity damage index and the target porosity damage index.

2. The method according to claim 1, characterized in that, The step of determining the damage range of the acoustic surface based on the first to Nth initial dynamic elastic moduli and the first to Nth damaged dynamic elastic moduli includes: The j-th erosion damage index is determined based on the j-th initial dynamic elastic modulus and the j-th damage dynamic elastic modulus. The damage range is determined based on the maximum and minimum values ​​of the first to Nth erosion damage indices of the acoustic surface.

3. The method according to claim 1, characterized in that, The step of calculating the average porosity damage index and the target porosity damage index of the target region based on the initial target structural image and the target damaged structural image includes: Based on the initial structural image of the target, determine the first porosity within the erosion range before erosion and the second porosity of the target region; Based on the target damaged structure image, determine the third porosity within the erosion range and the fourth porosity of the target region after erosion; The average pore damage index is determined based on the first porosity and the third porosity. The target pore damage index is determined based on the first porosity, the second porosity, and the fourth porosity.

4. The method according to claim 1, characterized in that, The method further includes: In response to a request to display the erosion detection interface, the erosion detection interface is displayed; wherein, the erosion detection interface includes a sample selection control; the sample selection control is used to select the concrete sample to be tested; When a selection operation for a target concrete sample is received through the sample selection control, the degree of damage and / or the erosion heterogeneity result of each region in the target concrete sample are displayed according to the selection operation.

5. A device for detecting uneven concrete erosion, characterized in that, The device includes: Acquisition module, used to acquire at least one concrete sample; An ultrasonic testing module is used to perform sound velocity testing on the concrete sample to determine a first sound velocity before erosion and a second sound velocity after erosion. The step of performing sound velocity testing on the concrete sample to determine the first sound velocity before erosion and the second sound velocity after erosion includes: dividing the concrete sample into multiple acoustic measurement surfaces; performing initial sound velocity testing on each of the acoustic measurement surfaces in the concrete sample to obtain the first sound velocity; conducting a sulfate wet-dry cycle erosion experiment on the concrete sample to obtain an experimental sample; and performing damage sound velocity testing on each of the acoustic measurement surfaces in the experimental sample to obtain the second sound velocity. A determination module is used to determine the degree of damage in each region of the concrete sample based on the first sound velocity and the second sound velocity; wherein the degree of damage includes mild damage, moderate damage, and severe damage; the acoustic testing surface includes N equally spaced test lines; where N is a positive integer; determining the degree of damage in each region of the concrete sample based on the first sound velocity and the second sound velocity includes: determining the j-th initial dynamic elastic modulus before erosion according to the first sound velocity corresponding to the j-th test line; wherein j is a positive integer and j is less than or equal to N; determining the j-th damaged dynamic elastic modulus after erosion according to the second sound velocity corresponding to the test line; determining the damage range of the acoustic testing surface according to the 1st to Nth initial dynamic elastic moduli and the 1st to Nth damaged dynamic elastic moduli; determining the damage parameter range according to the damage range; matching the 1st to Nth erosion damage indicators with the damage parameter range to determine the degree of damage in each region of the acoustic testing surface; and determining the degree of damage in each region of the concrete sample according to the degree of damage in each region of each acoustic testing surface. A performance testing module is used to perform erosion performance testing on a target area with severe damage to determine the erosion unevenness result of the target area. The erosion performance testing on the target area with severe damage to determine the erosion unevenness result includes: acquiring an initial structural image of the concrete sample before erosion, a damaged structural image after erosion, the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; wherein the critical sulfate concentration characterizes the maximum sulfate ion content that a unit of concrete can support and consume; determining the current erosion depth of the concrete sample based on the concrete diffusion coefficient, the critical sulfate concentration, and the sulfate ion content in the external environment; determining the erosion range in the concrete sample based on the current erosion depth; extracting the initial target structural image before erosion and the damaged target structural image after erosion corresponding to the erosion range; calculating the average porosity damage index and the target porosity damage index of the target area based on the initial target structural image and the damaged target structural image, respectively; and determining the erosion unevenness result based on the average porosity damage index and the target porosity damage index.

6. An electronic device, characterized in that, It includes a processor and a memory for storing a computer program of the processor; wherein the processor is configured to, when executing the computer program, implement the method as described in any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it performs the steps of the method according to any one of claims 1 to 4.

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