CN113779487A - Method and device for detecting content of chloride ions in mortar, terminal and storage medium - Google Patents
Method and device for detecting content of chloride ions in mortar, terminal and storage medium Download PDFInfo
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 420
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 154
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 199
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000004590 computer program Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 238000004448 titration Methods 0.000 claims description 9
- 230000003628 erosive effect Effects 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 230000006870 function Effects 0.000 description 15
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- 239000000523 sample Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
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- 239000010959 steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
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- 238000006731 degradation reaction Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000004445 quantitative analysis Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910001961 silver nitrate Inorganic materials 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000012086 standard solution Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
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Abstract
The application is applicable to the technical field of material detection, and provides a method, a device, a terminal and a storage medium for detecting the content of chloride ions in mortar, wherein the detection method comprises the following steps: acquiring direct wave amplitude of a mortar test piece and direct wave amplitude of mortar to be tested in different dry and wet cycle periods; acquiring a first corresponding relation between different mortar depths and chloride ion contents of the mortar test piece in the same dry-wet cycle period; determining candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to the first corresponding relation of the mortar test piece in the different dry-wet cycle periods; establishing a second corresponding relation between the direct wave amplitude and the candidate parameters of the mortar test piece in the same dry-wet cycle period; and determining the chloride ion content of each mortar depth in the mortar to be tested according to the direct wave amplitude of the mortar to be tested and the first corresponding relation and the second corresponding relation of the mortar test piece under different dry-wet cycle periods. The scheme realizes nondestructive detection of the content of chloride ions in the mortar.
Description
Technical Field
The application belongs to the technical field of material detection, and particularly relates to a method, a device, a terminal and a storage medium for detecting the content of chloride ions in mortar.
Background
The concrete structure exposed in the environments of the ocean, the deicing salt and the like is usually subjected to structural degradation due to the corrosion of chloride ions in the environments of the ocean, the deicing salt and the like, and the structural degradation is usually expressed in that a concrete protective layer is cracked, peeled and layered. The cracking, peeling and delamination of the concrete protective layer can lead to the corrosion damage of the bond between the concrete and the steel bars, and further lead to the corrosion damage of the steel bars. Therefore, it is very important to detect the distribution of chloride ions in the mortar of concrete accurately in time.
The detection of the distribution of chloride ions in mortar requires the detection of the content of chloride ions corresponding to the depth of any mortar in the mortar. The existing method for detecting the content of chloride ions in mortar comprises the following steps: the method comprises a drilling sampling method, an extrusion method and a Random Controlled Trial (RCT) detection method, wherein the methods for detecting the content of chloride ions in mortar all need to be broken for sampling, the method is inconvenient to apply in actual engineering, and the detection result is greatly influenced by test conditions and is not universal. Therefore, in order to solve the problem that the methods for detecting the content of chloride ions in the prior art are destructive, it is necessary to provide a nondestructive detection method for detecting the content of chloride ions corresponding to any depth of mortar in the mortar, and further detecting the distribution of chloride ions in the mortar.
Disclosure of Invention
The embodiment of the application provides a method, a device, a terminal and a storage medium for detecting the content of chloride ions in mortar, and realizes nondestructive detection of the content of chloride ions in mortar.
The first aspect of the embodiment of the application provides a method for detecting the content of chloride ions in mortar, and the method comprises the following steps:
acquiring direct wave amplitude of a mortar test piece and direct wave amplitude of mortar to be tested in different dry-wet cycle periods, wherein the mixing ratio of the mortar test piece is the same as that of the mortar to be tested;
aiming at different dry-wet cycle periods, acquiring first corresponding relations between different mortar depths and chloride ion contents of the mortar test piece in the same dry-wet cycle period, and acquiring first corresponding relations of the mortar test piece in different dry-wet cycle periods;
determining candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to the first corresponding relation of the mortar test piece in different dry-wet cycle periods, wherein the candidate parameters are parameters which form the corresponding first corresponding relation and are related to the chloride ion content of the mortar test piece;
aiming at different dry-wet cycle periods, establishing a second corresponding relation between the direct wave amplitude and the candidate parameters of the mortar test piece in the same dry-wet cycle period to obtain a second corresponding relation of the mortar test piece in different dry-wet cycle periods;
and determining the chloride ion content of each mortar depth in the mortar to be tested according to the direct wave amplitude of the mortar to be tested, the first corresponding relation of the mortar test piece in different dry-wet cycle periods and the second corresponding relation of the mortar test piece in different dry-wet cycle periods.
A second aspect of the embodiments of the present application provides a device for detecting a chloride ion content in mortar, where the device includes:
the amplitude acquisition module is used for acquiring direct wave amplitude of a mortar test piece and direct wave amplitude of mortar to be detected under different dry-wet cycle periods, and the mixing ratio of the mortar test piece is the same as that of the mortar to be detected;
the relation acquisition module is used for acquiring first corresponding relations between different mortar depths and chloride ion contents of the mortar test piece in the same dry-wet cycle period aiming at different dry-wet cycle periods to obtain the first corresponding relations of the mortar test piece in different dry-wet cycle periods;
the parameter determination module is used for determining candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to the first corresponding relation of the mortar test piece in different dry-wet cycle periods, wherein the candidate parameters are parameters which form the corresponding first corresponding relation and are related to the chloride ion content of the mortar test piece;
the relation establishing module is used for establishing a second corresponding relation between the direct wave amplitude and the candidate parameters of the mortar test piece in the same dry-wet cycle period aiming at different dry-wet cycle periods to obtain a second corresponding relation of the mortar test piece in different dry-wet cycle periods;
and the content determination module is used for determining the chloride ion content of each mortar depth in the mortar to be detected according to the direct wave amplitude of the mortar to be detected, the first corresponding relation of the mortar test piece in different dry-wet cycle periods and the second corresponding relation of the mortar test piece in different dry-wet cycle periods.
A third aspect of an embodiment of the present application provides a terminal device, including: the mortar content detection method comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the computer program to realize the mortar content detection method of the first aspect.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for detecting the content of chloride ions in mortar according to the first aspect is implemented.
A fifth aspect of embodiments of the present application provides a computer program product, which, when running on a terminal device, causes the terminal device to execute the method for detecting the content of chloride ions in mortar according to the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that: in the embodiment of the application, the direct wave amplitude of the mortar test piece and the direct wave amplitude of the mortar to be tested in different dry-wet cycle periods are firstly obtained, and the mixing ratio of the mortar test piece and the mortar to be tested is the same, so that the content of chloride ions in the mortar to be tested can be obtained by obtaining relevant information (such as a first corresponding relation, a second corresponding relation and the like) of the mortar test piece. And secondly, acquiring first corresponding relations between different mortar depths and chloride ion contents of the mortar test pieces in the same dry-wet cycle period according to different dry-wet cycle periods to obtain the first corresponding relations of the mortar test pieces in different dry-wet cycle periods, and determining candidate parameters of the mortar test pieces in the corresponding dry-wet cycle periods according to the first corresponding relations of the mortar test pieces in different dry-wet cycle periods. And finally, aiming at different dry-wet cycle periods, establishing a second corresponding relation between the direct wave amplitude of the mortar test piece and the candidate parameter in the same dry-wet cycle period to obtain a second corresponding relation between the direct wave amplitude of the mortar test piece and the corresponding candidate parameter, wherein the second corresponding relation can represent the corresponding relation between the direct wave amplitude of the mortar to be detected and the corresponding candidate parameter because the mixing ratio of the mortar test piece and the mortar to be detected is the same, so that the direct wave amplitude of the mortar to be detected, the first corresponding relation and the second corresponding relation of the mortar test piece in different dry-wet cycle periods can determine the chloride ion content of each mortar depth in the mortar to be detected without damaging the mortar to be detected, and the scheme realizes the nondestructive detection of the chloride ion content in the mortar to be detected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for detecting the content of chloride ions in mortar according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for detecting the content of chloride ions in mortar, provided in example two of the present application;
FIG. 3 is an exemplary graph of a chloride ion distribution curve;
FIG. 4 is a schematic structural diagram of a device for detecting the content of chloride ions in mortar, provided by the third embodiment of the present application;
fig. 5 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
It should be understood that, the sequence numbers of the steps in this embodiment do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation to the implementation process of the embodiment of the present application.
In the prior art, there are three main methods for detecting the content of chloride ions in mortar: 1. drilling and sampling: firstly, drilling and sampling, grinding to obtain a mortar powder sample, fully dissolving the mortar powder sample by using water or nitric acid, filtering, diluting and the like, and then measuring the content of chloride ions in the solution by using a quantitative analysis method such as chemical titration and the like, wherein the total content of free chloride ions or chloride can be respectively measured. 2. Extrusion method: the pore solution in the mortar powder sample is pressed out by a high-pressure device (applying a pressure of about 650 MPa), and then the chloride ion content in the solution is measured by quantitative analysis. 3. RCT assay: the content of the chloride ions in the chloride ion solution is obtained according to the direct proportional relation between the potential difference generated by the chloride ion solution without any impurities and the concentration of the chloride ion solution, a special extract liquid is used for extracting the chloride ions in the mortar powder sample in the detection process, other anions are shielded, in the extracted mortar powder sample solution, the chloride ions are easy to generate redox reaction, so that the potential difference is generated, and the concentration of the chloride ions can be obtained through the reverse deduction of a relational expression. Obviously, the three methods are destructive, the operation steps are complex and time-consuming, errors are easy to introduce, and the real-time monitoring of the mortar microenvironment is difficult to realize; in addition, the total pore solution of the sample is extruded by the extrusion method, but the chloride ion content of each depth in the mortar cannot be obtained, and is particularly obvious in an ocean engineering structure; the RCT method has high precision, but the extraction liquid used for detection is expensive, and the detection cost is high.
The method for measuring the content of the chloride ions in the mortar needs to perform shape breaking sampling, so that the method is inconvenient to apply in practical engineering, and the detection result is greatly influenced by test conditions and has no universal applicability. In order to realize nondestructive detection of the content of chloride ions in mortar, the application provides a method for detecting the content of chloride ions in mortar.
In order to explain the technical solution of the present application, the following description is given by way of specific examples.
Referring to fig. 1, a schematic flow chart of a method for detecting the content of chloride ions in mortar provided in an embodiment of the present application is shown. As shown in fig. 1, the method for detecting the content of chloride ions in mortar may include the following steps:
The mixing proportion of the mortar test piece is the same as that of the mortar to be detected, wherein the same mixing proportion means that the mortar test piece and the mortar to be detected are made of the same material and the same mixing proportion of the material, so that the mixing proportion of the material forming the mortar test piece in a unit volume (such as cubic centimeter) is the same as that of the material forming the mortar to be detected.
In one possible embodiment, the mortar coupon may include five epoxy coated surfaces and one erosion surface.
If the mortar test piece comprises five surfaces coated with the epoxy resin and one erosion surface, after the mortar test piece passes through different dry-wet cycle periods, the one-dimensional transmission of the chloride ions in the mortar test piece under different dry-wet cycle periods can be obtained, and correspondingly, the one-dimensional distribution of the chloride ions in the mortar test piece can be obtained.
Illustratively, the ground penetrating radar is statically placed on the surface of the mortar erosion surface, electromagnetic waves are transmitted to the mortar test piece by the ground penetrating radar, and the returned electromagnetic waves are received, so that A scanning of chloride ions in the mortar test piece under different dry and wet cycle periods is obtained. According to the corresponding relation between the A scanning in the mortar test piece and the distribution of the chloride ions in the mortar test piece under the same dry-wet cycle period, the one-dimensional distribution of the chloride ions below the erosion surface of the mortar test piece can be obtained.
It should be understood that the application does not limit the position of the surface coated with the epoxy resin in the mortar test piece, and the position can be any one of six surfaces of the mortar test piece.
It should also be understood that the size of the mortar test piece is not limited in the present application, for example, the size of the mortar test piece may be 600mm × 400mm × 120 mm.
In the embodiment of the application, the direct wave amplitudes of the mortar test piece in different dry and wet cycle periods can be obtained by recording the scanning results of the mortar test piece by using a ground penetrating radar, and the direct wave amplitudes of the mortar test piece in different dry and wet cycle periods can be obtained by recording the scanning results of the mortar test piece by using the ground penetrating radar, wherein the direct wave amplitudes of the mortar test piece in different dry and wet cycle periods can refer to the direct wave amplitude of the mortar test piece after undergoing a first dry and wet cycle period, the direct wave amplitude of the mortar test piece after undergoing a second dry and wet cycle period, or the direct wave amplitude of the mortar test piece after undergoing an Mth dry and wet cycle period (M is an integer greater than zero), and the duration of each dry and wet cycle period is the same.
Illustratively, the mortar test piece is placed in a sodium chloride solution to be soaked for 24 hours, then the mortar test piece after being soaked for 24 hours is taken out to be aired for 24 hours, 48 hours formed by soaking for 24 hours and airing for 24 hours is called a first dry-wet cycle period, if the mortar test piece after the first dry-wet cycle period is placed in the sodium chloride solution again to be soaked for 24 hours, the mortar test piece is taken out to be aired for 24 hours, and the mortar test piece at the moment is the mortar test piece after the second dry-wet cycle period. Recording an A scanning result of the mortar test piece after the mortar test piece undergoes a first dry-wet cycle period through a ground penetrating radar, and extracting the direct wave amplitude of the mortar test piece after the first dry-wet cycle period through the A scanning result, so that the direct wave amplitudes of the mortar test piece in different dry-wet cycle periods can be obtained; similarly, the direct wave amplitude of the mortar to be measured can also be obtained by recording the A scanning result of the mortar to be measured by the ground penetrating radar.
In one possible embodiment, obtaining the direct wave amplitude of the mortar test piece at different dry-wet cycle periods comprises:
aiming at the ith dry-wet cycle period in different dry-wet cycle periods, wherein the ith dry-wet cycle period is any one of the different dry-wet cycle periods, and acquiring a single signal track recorded in a bottom penetrating radar time domain received by a mortar test piece under the ith dry-wet cycle period;
and determining the initial maximum amplitude value in the single signal track as the direct wave amplitude of the mortar test piece in the ith dry-wet cycle period.
In the embodiment of the application, for the ith dry-wet cycle period, i is greater than zero and less than or equal to the total number of the dry-wet cycle period, a ground penetrating radar is adopted to record electromagnetic wave signals received by a mortar test piece after the mortar test piece passes through the ith cycle period, wherein the electromagnetic wave signals comprise direct wave signals and reflected wave signals. Because the direct wave signal is the signal received by the ground penetrating radar transmitting antenna directly reaching the receiving antenna, the propagation time of the direct wave signal is the shortest compared with the propagation time of the reflected wave signal. Therefore, the initial maximum amplitude value in the single signal track recorded in the ground penetrating radar time domain is recorded as the direct wave amplitude of the mortar test piece in the ith dry-wet cycle period.
102, aiming at different dry-wet cycle periods, obtaining first corresponding relations between different mortar depths and chloride ion contents of the mortar test pieces in the same dry-wet cycle period, and obtaining first corresponding relations of the mortar test pieces in different dry-wet cycle periods.
In the embodiment of the application, after the same mortar test piece undergoes different dry-wet cycle periods, the chloride ion contents of different mortar depths in the mortar test piece are different, so that a first corresponding relationship of the mortar test piece under different dry-wet cycle periods can be obtained for different dry-wet cycle periods, the corresponding relationship can represent a mapping relationship of the mortar depth of the same mortar test piece under the same dry-wet cycle period and the chloride ion content under the same mortar depth, and can also represent a corresponding functional relationship between the different mortar depths and the chloride ion contents of the same mortar test piece under the same dry-wet cycle period.
In a possible implementation manner, for different dry-wet cycle periods, obtaining first corresponding relations between different mortar depths and chloride ion contents of the mortar test piece in the same dry-wet cycle period, and obtaining the first corresponding relations of the mortar test piece in different dry-wet cycle periods includes:
aiming at the ith dry-wet cycle period in different dry-wet cycle periods, wherein the ith dry-wet cycle period is any one of the different dry-wet cycle periods, measuring the chloride ion content of the mortar test piece at different mortar depths in the ith dry-wet cycle period by adopting a chloride ion titration method;
according to different mortar depths of the mortar test piece in the ith dry-wet cycle period and the chloride ion contents of the different mortar depths, obtaining a first corresponding relation between the different mortar depths of the mortar test piece in the ith dry-wet cycle period and the chloride ion contents, and obtaining a first corresponding relation of the mortar test piece in the ith dry-wet cycle period.
In the embodiment of the application, when chloride ion titration is used to measure chloride ion contents of mortar test pieces with different mortar depths in the ith dry-wet cycle, the mortar test pieces are firstly cut into a plurality of mortar sub-test pieces according to a preset thickness (i.e. representing the mortar depth), each mortar sub-test piece is drilled to obtain powder, the powder taken out is titrated to obtain chloride ion contents with different mortar depths, and the chloride ion contents with different mortar depths can be specifically calculated by adopting the following formula:
wherein, WClIs the chloride ion content of the mortar test piece,
is the concentration of silver nitrate standard solution, V3The dosage of silver nitrate standard solution in titration, V2The amount of filtrate extracted for each titration, V1The amount of the distilled water is the amount of the distilled water for soaking the mortar test piece, and G is the quality of the mortar test piece.
Exemplarily, assuming that the thickness of the mortar specimen after the mortar specimen undergoes the first dry-wet cycle period is 20mm, the mortar specimen is cut into a plurality of mortar sub-specimens according to a preset thickness, for example, the mortar specimen is cut into 10 mortar sub-specimens with a thickness of 2mm, the mortar depth of each mortar sub-specimen is obtained according to the thickness close to the erosion surface, the thickness of the first mortar sub-specimen closest to the erosion surface is 2mm, the thickness of the mortar sub-specimen close to the first mortar sub-specimen is 4mm, and by analogy, the mortar depths of 10 mortar sub-specimens are respectively 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, and 20mm, and the chloride ion content of each mortar sub-specimen is obtained according to the above chloride ion titration method, and accordingly, the chloride ion content of each mortar depth corresponding to the mortar depth can constitute a data point, a total of 10 data points can be acquired. And a first corresponding relation of the mortar test piece under the first dry-wet cycle period can be obtained by performing data fitting on the 10 data points.
And 103, determining candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to the first corresponding relation of the mortar test piece in different dry-wet cycle periods.
In the embodiment of the present application, the candidate parameter is a parameter that forms a corresponding first corresponding relationship and is related to the chloride ion content of the mortar test piece, in step 102, the first corresponding relationship of the mortar test piece in different dry-wet cycle periods can be obtained by performing data fitting on a plurality of data points, in the process of fitting the plurality of data points, a functional relational expression for fitting the plurality of data points can be selected first, a plurality of undetermined coefficients in the functional relational expression are obtained, the plurality of data points are brought into the functional relational expression, and when the undetermined coefficients are solved so that the difference between the functional relational expression and the plurality of data points is minimized, the value of the undetermined coefficients is determined as the candidate parameter of the mortar test piece in the corresponding dry-wet cycle period.
After the undetermined coefficient is obtained through solving, a first corresponding relation of the mortar test piece under different dry-wet cycle periods can be obtained, and then candidate parameters are extracted from the first corresponding relation.
Illustratively, 10 data points which can be formed by 10 mortar depths and the chloride ion content corresponding to the mortar depths are obtained, and a functional relation fitting the 10 data points is obtained, wherein the functional relation can be specifically expressed as:
wherein, C(x,t)The content of chloride ions at the position where the depth of the mortar is x; t is time; x is the depth of the mortar; c0Is the initial chloride content, in known amounts; cmaxRefers to the maximum chloride ion content; Δ x refers to the depth of the convection zone (i.e., the depth of the mortar corresponding to the maximum chloride ion content); deffRefers to the chloride ion diffusion coefficient.
In the above functional relation, the maximum chloride ion content CmaxDepth of convection zone Deltax, diffusion coefficient of chloride ion DeffAll the unknown undetermined coefficients are obtained, 10 data points (the abscissa is the depth of the mortar, and the ordinate is the content of chloride ions) are fitted according to the functional relation, and different undetermined coefficients (namely candidate parameters) and different functional expressions (namely the functional relation after the undetermined coefficients are introduced) can be obtained by fitting for different dry-wet cycle periods. Determining the maximum chloride ion content CmaxDepth of convection zone Deltax, diffusion coefficient of chloride ion DeffAfter the three undetermined coefficients are determined, the corresponding function expression can be determined, the intersection point of the curve and the y axis is obtained according to the function expression, and the ordinate of the intersection point is the surface chloride ion content CsAccording to different functions, thereforeAnd (4) expressing different candidate parameters.
And step 104, aiming at different dry-wet cycle periods, establishing a second corresponding relation between the direct wave amplitude of the mortar test piece and the candidate parameter under the same dry-wet cycle period, and obtaining a second corresponding relation of the mortar test piece under different dry-wet cycle periods.
In the embodiment of the application, the direct wave amplitude and the candidate parameters of the mortar test piece in different dry and wet cycle periods are different, and the mortar test piece has a determined corresponding relation with the direct wave amplitude and the candidate parameters in the same dry and wet cycle period, so that the mortar test piece has the only corresponding direct wave amplitude and the only corresponding candidate parameters in the same dry and wet cycle period. And establishing a second corresponding relation between the direct wave amplitude and the candidate parameters of the mortar test piece in the same dry-wet cycle period, so as to obtain a plurality of second corresponding relations of the mortar test piece in different dry-wet cycle periods.
And 105, determining the chloride ion content of each mortar depth in the mortar to be detected according to the direct wave amplitude of the mortar to be detected, the first corresponding relation of the mortar test piece in different dry-wet cycle periods and the second corresponding relation of the mortar test piece in different dry-wet cycle periods.
In the embodiment of the application, since the mixing ratio of the mortar test piece to the mortar to be tested is the same, when the direct wave amplitudes of the mortar test piece and the mortar to be tested are the same, the mortar to be tested and the mortar test piece at the moment can be considered to correspond to the same candidate parameters. Therefore, when the direct wave amplitude of the mortar to be detected is obtained, the candidate parameters corresponding to the mortar to be detected can be obtained according to the second corresponding relation, and the chloride ion content of each mortar depth in the mortar to be detected is determined according to the candidate parameters and the first corresponding relation.
In a possible implementation manner, determining the chloride ion content of each mortar depth in the mortar to be tested according to the direct wave amplitude of the mortar to be tested, the first corresponding relation of the mortar test piece in different dry-wet cycle periods and the second corresponding relation of the mortar test piece in different dry-wet cycle periods comprises:
determining target parameters according to the direct wave amplitude of the mortar to be detected and the second corresponding relation of the mortar test piece in different dry-wet cycle periods;
determining a target corresponding relation from the first corresponding relations of the mortar test pieces in different dry-wet cycle periods;
and determining the content of chloride ions in each depth of the mortar to be tested according to the target corresponding relation.
The target parameter is a candidate parameter having a corresponding relationship with the direct wave amplitude of the mortar to be tested (the corresponding relationship between the direct wave amplitude of the mortar to be tested and the candidate parameter is the same as the second corresponding relationship), and the target corresponding relationship is a first corresponding relationship including the target parameter, that is, the target parameter is included in the first corresponding relationship to obtain the target corresponding relationship.
In the embodiment of the application, the direct wave amplitude of the mortar test piece and the direct wave amplitude of the mortar to be tested in different dry-wet cycle periods are firstly obtained, and the mixing ratio of the mortar test piece and the mortar to be tested is the same, so that the distribution condition of the chloride ion content in the mortar to be tested can be obtained by obtaining the relevant information (such as the first corresponding relation, the second corresponding relation and the like) of the mortar test piece. And secondly, acquiring first corresponding relations between different mortar depths and chloride ion contents of the mortar test pieces in the same dry-wet cycle period according to different dry-wet cycle periods to obtain the first corresponding relations of the mortar test pieces in different dry-wet cycle periods, and determining candidate parameters of the mortar test pieces in the corresponding dry-wet cycle periods according to the first corresponding relations of the mortar test pieces in different dry-wet cycle periods. And finally, aiming at different dry-wet cycle periods, establishing a second corresponding relation between the direct wave amplitude of the mortar test piece and the candidate parameter in the same dry-wet cycle period to obtain a second corresponding relation between the direct wave amplitude of the mortar test piece and the corresponding candidate parameter, wherein the second corresponding relation can represent the corresponding relation between the direct wave amplitude of the mortar to be detected and the corresponding candidate parameter because the mixing ratio of the mortar test piece and the mortar to be detected is the same, so that the direct wave amplitude of the mortar to be detected, the first corresponding relation and the second corresponding relation of the mortar test piece in different dry-wet cycle periods can determine the chloride ion content of each mortar depth in the mortar to be detected without damaging the mortar to be detected, and the scheme realizes the nondestructive detection of the chloride ion content in the mortar to be detected.
Referring to fig. 2, a schematic flow chart of a method for detecting the content of chloride ions in mortar provided in the second embodiment of the present application is shown. As shown in fig. 2, the method for detecting the content of chloride ions in mortar may include the following steps:
And 203, determining candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to the first corresponding relation of the mortar test piece in different dry-wet cycle periods.
And 204, aiming at different dry-wet cycle periods, establishing a second corresponding relation between the direct wave amplitude of the mortar test piece and the candidate parameter in the same dry-wet cycle period, and obtaining a second corresponding relation of the mortar test piece in different dry-wet cycle periods.
And step 205, determining the chloride ion content of each mortar depth in the mortar to be detected according to the direct wave amplitude of the mortar to be detected, the first corresponding relation of the mortar test piece in different dry-wet cycle periods and the second corresponding relation of the mortar test piece in different dry-wet cycle periods.
The steps 201-205 of this embodiment are the same as the steps 101-105 of the previous embodiment, and reference may be made to these steps, which are not described herein again.
And step 206, determining a distribution curve formed by the chloride ion contents of all the mortar depths in the mortar to be detected according to the chloride ion content of each mortar depth in the mortar to be detected and the target parameter.
In the embodiment of the application, the target parameter is a candidate parameter having a corresponding relationship with a direct wave of the mortar to be measured, and the target parameter can determine a function relation fitting data points formed by chloride ion content of each mortar depth in the mortar to be measured, in the function relation, an independent variable is the mortar depth, and a dependent variable is the chloride ion content, and according to the function relation, a distribution curve formed by the chloride ion content of all the mortar depths in the mortar to be measured can be obtained by using a point tracing method according to the chloride ion content of each mortar depth in the mortar to be measured.
Exemplarily, as shown in fig. 3, it is an exemplary graph of chloride ion distribution curve, wherein the abscissa represents depth of mortar, the ordinate represents content of chloride ion, C (x, t) is a distribution curve formed by content of chloride ion at all depths of mortar to be tested, CsRefers to the surface chloride ion content, CmaxThe concrete mortar is the largest chloride ion content, the area enclosed by the steel bar and two coordinate axes in the graph 3 is the mortar to be tested, and the change of the chloride ion content in the mortar to be tested along with the depth of the mortar can be observed through a chloride ion distribution curve.
In one possible embodiment, the distribution curves formed by the chloride ion content of all mortar depths in the mortar to be tested are determined according to the target parameters.
In the embodiment of the application, the target parameters can be substituted into the corresponding fitting functions to obtain the fitting functions without unknown quantity, and then the fitting functions are fitted into a distribution curve through origin software. The fitting function is an origin custom data fitting function, and the custom data fitting function can be directly fitted into a chloride ion distribution curve through origin software.
Compared with the first embodiment, the second embodiment of the application shows the chloride ion content of all mortar depths in the mortar to be detected in a form on the distribution curve, so that the distribution condition of the chloride ions in the mortar can be more clearly detected.
Referring to fig. 4, a schematic structural diagram of a device for detecting a content of chloride ions in mortar provided in the third embodiment of the present application is shown, and for convenience of description, only the parts related to the embodiments of the present application are shown.
The device for detecting the content of the chloride ions in the mortar specifically comprises the following modules:
the amplitude acquisition module 401 is configured to acquire direct wave amplitudes of the mortar test piece and direct wave amplitudes of the mortar to be tested in different dry-wet cycle periods, where the mixing ratio of the mortar test piece is the same as the mixing ratio of the mortar to be tested;
a relation obtaining module 402, configured to obtain, for different dry-wet cycle periods, first corresponding relations between different mortar depths and chloride ion contents of the mortar test pieces in the same dry-wet cycle period, so as to obtain first corresponding relations of the mortar test pieces in different dry-wet cycle periods;
the parameter determining module 403 is configured to determine candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to a first corresponding relationship of the mortar test piece in different dry-wet cycle periods, where the candidate parameters are parameters that form the corresponding first corresponding relationship and are related to the chloride ion content of the mortar test piece;
a relation establishing module 404, configured to establish, for different dry-wet cycle periods, a second corresponding relation between the direct wave amplitude of the mortar test piece in the same dry-wet cycle period and the candidate parameter, so as to obtain a second corresponding relation of the mortar test piece in different dry-wet cycle periods;
the content determining module 405 is configured to determine the chloride ion content of each mortar depth in the mortar to be tested according to the direct wave amplitude of the mortar to be tested, the first corresponding relationship of the mortar test piece in different dry-wet cycle periods, and the second corresponding relationship of the mortar test piece in different dry-wet cycle periods.
In this embodiment of the present application, the relationship obtaining module 402 may specifically include the following sub-modules:
the titration submodule is used for measuring the chloride ion content of the mortar test piece at different mortar depths in the ith dry-wet cycle period by adopting a chloride ion titration method aiming at the ith dry-wet cycle period in different dry-wet cycle periods, wherein the ith dry-wet cycle period is any one of the different dry-wet cycle periods;
and the relation correspondence submodule is used for acquiring a first correspondence relation between different mortar depths and chloride ion contents of the mortar test piece in the ith dry-wet cycle period according to different mortar depths and chloride ion contents of different mortar depths of the mortar test piece in the ith dry-wet cycle period, so as to acquire the first correspondence relation of the mortar test piece in the ith dry-wet cycle period.
In this embodiment, the content determining module 405 may specifically include the following sub-modules:
the target parameter determining submodule is used for determining a target parameter according to the direct wave amplitude of the mortar to be detected and a second corresponding relation of the mortar test piece under different dry-wet cycle periods, and the target parameter is a candidate parameter which has a corresponding relation with the direct wave amplitude of the mortar to be detected;
the target relation determining submodule is used for determining a target corresponding relation from first corresponding relations of the mortar test piece in different dry-wet cycle periods, and the target corresponding relation refers to the first corresponding relation including target parameters;
and the content determination submodule is used for determining the chloride ion content of each mortar depth in the mortar to be detected according to the target corresponding relation.
In this embodiment, the amplitude obtaining module 401 may specifically include the following sub-modules:
the propagation time acquisition submodule is used for acquiring a single signal track recorded in a ground penetrating radar time domain received by a mortar test piece in the ith dry-wet cycle period in different dry-wet cycle periods, wherein the ith dry-wet cycle period is any one of the different dry-wet cycle periods;
and the amplitude determining submodule is used for determining that the initial maximum amplitude value in the single signal track is the direct wave amplitude of the mortar test piece in the ith dry-wet cycle period.
In this application, the device for detecting the content of chloride ions in mortar may further include the following modules:
and the curve fitting module is used for determining a distribution curve formed by the chloride ion contents of all the mortar depths in the mortar to be tested according to the chloride ion content of each mortar depth in the mortar to be tested and the target parameter.
The device for detecting the content of chloride ions in mortar provided by the embodiment of the application can be applied to the method embodiments, and for details, reference is made to the description of the method embodiments, and details are not repeated here.
Fig. 5 is a schematic structural diagram of a terminal device according to a fourth embodiment of the present application. As shown in fig. 5, the terminal device 500 of this embodiment includes: at least one processor 510 (only one is shown in fig. 5), a memory 520, and a computer program 521 stored in the memory 520 and operable on the at least one processor 510, wherein when the processor 510 executes the computer program 521, the steps in any one of the embodiments of the method for detecting the content of chloride ions in mortar described above are implemented.
The terminal device 500 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 510, a memory 520. Those skilled in the art will appreciate that fig. 5 is only an example of the terminal device 500, and does not constitute a limitation to the terminal device 500, and may include more or less components than those shown, or combine some components, or different components, such as an input/output device, a network access device, and the like.
The Processor 510 may be a Central Processing Unit (CPU), and the Processor 510 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 520 may in some embodiments be an internal storage unit of the terminal device 500, such as a hard disk or a memory of the terminal device 500. The memory 520 may also be an external storage device of the terminal device 500 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 500. Further, the memory 520 may also include both an internal storage unit and an external storage device of the terminal device 500. The memory 520 is used for storing an operating system, an application program, a Boot Loader (Boot Loader), data, and other programs, such as program codes of the computer programs. The memory 520 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
When the computer program product runs on a terminal device, the steps in the method embodiments can be implemented when the terminal device executes the computer program product.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A detection method for the content of chloride ions in mortar is characterized by comprising the following steps:
acquiring direct wave amplitude of a mortar test piece and direct wave amplitude of mortar to be tested in different dry-wet cycle periods, wherein the mixing ratio of the mortar test piece is the same as that of the mortar to be tested;
aiming at different dry-wet cycle periods, acquiring first corresponding relations between different mortar depths and chloride ion contents of the mortar test piece in the same dry-wet cycle period, and acquiring first corresponding relations of the mortar test piece in different dry-wet cycle periods;
determining candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to the first corresponding relation of the mortar test piece in different dry-wet cycle periods, wherein the candidate parameters are parameters which form the corresponding first corresponding relation and are related to the chloride ion content of the mortar test piece;
aiming at different dry-wet cycle periods, establishing a second corresponding relation between the direct wave amplitude and the candidate parameters of the mortar test piece in the same dry-wet cycle period to obtain a second corresponding relation of the mortar test piece in different dry-wet cycle periods;
and determining the chloride ion content of each mortar depth in the mortar to be tested according to the direct wave amplitude of the mortar to be tested, the first corresponding relation of the mortar test piece in different dry-wet cycle periods and the second corresponding relation of the mortar test piece in different dry-wet cycle periods.
2. The detection method according to claim 1, wherein the obtaining of the first corresponding relationship between different mortar depths and chloride ion contents of the mortar test pieces in the same dry-wet cycle period for different dry-wet cycle periods to obtain the first corresponding relationship between the mortar test pieces in different dry-wet cycle periods comprises:
aiming at the ith dry-wet cycle period in different dry-wet cycle periods, wherein the ith dry-wet cycle period is any one of the different dry-wet cycle periods, measuring the chloride ion content of the mortar test piece at different mortar depths in the ith dry-wet cycle period by adopting a chloride ion titration method;
and according to the different mortar depths of the mortar test piece in the ith dry-wet cycle period and the chloride ion contents of the different mortar depths, obtaining a first corresponding relation between the different mortar depths of the mortar test piece in the ith dry-wet cycle period and the chloride ion contents, and obtaining a first corresponding relation of the mortar test piece in the ith dry-wet cycle period.
3. The inspection method of claim 1, wherein the mortar coupon includes five epoxy coated surfaces and an erosion surface.
4. The detection method of claim 1, wherein the candidate parameters comprise: the mortar comprises the surface chloride ion content, the maximum chloride ion content, the depth of a convection zone and the chloride ion diffusion coefficient, wherein the depth of the convection zone refers to the depth of the mortar corresponding to the maximum chloride ion content.
5. The detection method according to claim 1, wherein the determining the chloride ion content of each mortar depth in the mortar to be detected according to the direct wave amplitude of the mortar to be detected, the first corresponding relationship of the mortar test piece in different dry-wet cycle periods and the second corresponding relationship of the mortar test piece in different dry-wet cycle periods comprises:
determining a target parameter according to the direct wave amplitude of the mortar to be detected and a second corresponding relation of the mortar test piece under different dry-wet cycle periods, wherein the target parameter is a candidate parameter which has a corresponding relation with the direct wave amplitude of the mortar to be detected;
determining a target corresponding relation from first corresponding relations of the mortar test piece in different dry-wet cycle periods, wherein the target corresponding relation refers to the first corresponding relation including the target parameters;
and determining the content of chloride ions in each depth of the mortar to be tested according to the target corresponding relation.
6. The detection method of claim 5, further comprising:
and determining a distribution curve formed by the chloride ion contents of all the mortar depths in the mortar to be tested according to the chloride ion content of each mortar depth in the mortar to be tested and the target parameter.
7. The detection method as claimed in any one of claims 1 to 6, wherein the step of obtaining the direct wave amplitude of the mortar test piece under different dry-wet cycle periods comprises the following steps:
aiming at the ith dry-wet cycle period in different dry-wet cycle periods, wherein the ith dry-wet cycle period is any one of the different dry-wet cycle periods, acquiring a single signal track recorded in a ground penetrating radar time domain received by the mortar test piece under the ith dry-wet cycle period;
and determining the initial maximum amplitude value in the single signal track as the direct wave amplitude of the mortar test piece in the ith dry-wet cycle period.
8. A detection device for detecting the content of chloride ions in mortar is characterized by comprising:
the amplitude acquisition module is used for acquiring direct wave amplitude of a mortar test piece and direct wave amplitude of mortar to be detected under different dry-wet cycle periods, and the mixing ratio of the mortar test piece is the same as that of the mortar to be detected;
the relation acquisition module is used for acquiring first corresponding relations between different mortar depths and chloride ion contents of the mortar test piece in the same dry-wet cycle period aiming at different dry-wet cycle periods to obtain the first corresponding relations of the mortar test piece in different dry-wet cycle periods;
the parameter determination module is used for determining candidate parameters of the mortar test piece in the corresponding dry-wet cycle period according to the first corresponding relation of the mortar test piece in different dry-wet cycle periods, wherein the candidate parameters are parameters which form the corresponding first corresponding relation and are related to the chloride ion content of the mortar test piece;
the relation establishing module is used for establishing a second corresponding relation between the direct wave amplitude and the candidate parameters of the mortar test piece in the same dry-wet cycle period aiming at different dry-wet cycle periods to obtain a second corresponding relation of the mortar test piece in different dry-wet cycle periods;
and the content determination module is used for determining the chloride ion content of each mortar depth in the mortar to be detected according to the direct wave amplitude of the mortar to be detected, the first corresponding relation of the mortar test piece in different dry-wet cycle periods and the second corresponding relation of the mortar test piece in different dry-wet cycle periods.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
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