A method for detecting exterior walls of building

Abstract

The invention discloses a method for detecting the exterior wall of a building, and relates to the technical field of detecting the exterior wall of a building. A data detection module is used to respectively detect and experimentally obtain detection data of a pore volume KXZ, a pore surface area KXB, an average particle diameter KLZ, a particle density KM, a Darcy coefficient d, an external pressure difference WY, a material thickness CH and a weathering resistance coefficient KF. The maintenance cost WC, a maintenance cycle WZ and the detection data of historical data of the building exterior wall are combined, and a data evaluation processing module is used to evaluate the pore characteristics, permeability and durability. The detection and evaluation results of the pore characteristics, permeability and durability are comprehensively analyzed to evaluate the overall performance of the exterior wall, and corresponding repair, transformation and reinforcement suggestions are proposed according to the evaluation results. The invention realizes a comprehensive and accurate evaluation of the performance of the exterior wall material by constructing a comprehensive evaluation system, adopting a quantitative evaluation method, optimizing material selection and guiding construction and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of building exterior wall detection, in particular to a building exterior wall detection method. Background Art

[0002] In the field of housing construction, the exterior wall is the first line of defense of the building, and its stability and safety are directly related to the overall safety of the building. Problems such as cracking, water seepage, and falling off of the exterior wall not only affect the beauty of the building, but also pose a threat to the safety of life and property of residents. In addition, damage to the exterior wall will accelerate the aging process of the building and reduce its service life. Therefore, regular inspection of the condition of the exterior wall and timely detection and repair of problems are of great significance to extending the service life of the building.

[0003] However, existing technologies often only focus on one aspect of the performance of exterior wall materials, including strength, hardness and waterproofness, while ignoring the intrinsic connection and mutual influence between porosity characteristics, permeability and durability. Moreover, for the evaluation of porosity characteristics, permeability and durability, existing technologies mostly use qualitative descriptions and simple experimental tests, lacking scientific quantitative evaluation methods, resulting in subjectivity and uncertainty in the evaluation results. In addition, existing technologies lack a complete evaluation system and are unable to organically combine porosity characteristics, permeability and durability to form a comprehensive evaluation of the performance of exterior wall materials. Summary of the invention

[0004] The purpose of the present invention is to provide a method for detecting the exterior wall of a building, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution, and the specific detection steps are as follows:

[0006] Using the data detection module, the test data of pore volume KXT, pore surface area KXB, average particle diameter KLZ, particle density KM, Darcy coefficient d, external pressure difference WY, material thickness CH and weathering resistance coefficient KF are respectively detected and experimentally obtained;

[0007] Combine the maintenance cost WC, maintenance cycle WZ and inspection data of the building exterior wall historical data, and use the data evaluation processing module to evaluate the porosity characteristics, permeability and durability;

[0008] Comprehensively analyze the test and evaluation results of porosity characteristics, permeability and durability to evaluate the overall performance of the exterior wall, and make corresponding repair, renovation and reinforcement suggestions based on the evaluation results;

[0009] The data evaluation processing module includes a unit for evaluating the pore structure characteristics of the exterior wall material, a unit for evaluating the permeability of the exterior wall material, and a unit for evaluating the durability of the exterior wall material;

[0010] The equipment used in the data detection module includes a microscope and a scanning electron microscope, a pore characteristic measuring instrument, a particle analyzer, a permeability tester, and a weather resistance tester;

[0011] The equipment used in the data evaluation and processing module includes data processing and analysis software.

[0012] Optionally, the calculation formula for evaluating the pore structure characteristic unit in the exterior wall material is as follows: ;

[0013] in:

[0014] KXZ is the comprehensive index of pore characteristics;

[0015] KXT is the pore volume;

[0016] KXB is the pore surface area;

[0017] The pore volume KXT and pore surface area KXB reflect the basic characteristics of the pore structure. The pore volume KXT affects the density, strength and thermal insulation performance of the material, while the pore surface area KXB is closely related to the adsorption capacity, permeability and reactivity of the material.

[0018] KLZ is the average particle diameter. The average particle diameter KLZ affects the bulk density, porosity and mechanical properties of the material.

[0019] KM is the particle density. The particle density KM is related to the overall density and weight of the material and affects the stability of the pore structure. High-density particles help to enhance the strength and durability of the material.

[0020] The evaluation of the unit for evaluating the pore structure characteristics in the exterior wall material is as follows;

[0021] The ratio of pore volume KXT to pore surface area KXB, combined with particle diameter and density, is used to comprehensively evaluate the pore characteristics, namely the pore characteristic comprehensive index KXZ.

[0022] Optionally, the calculation formula for evaluating the permeability unit of the exterior wall material is as follows:

[0023] SP = (d × KXZ × WY) / CH;

[0024] in:

[0025] SP is the permeability assessment index;

[0026] d is the Darcy coefficient, which reflects the permeability of the material itself;

[0027] WY is the external pressure difference, WY reflects the water pressure difference;

[0028] CH is the material thickness.

[0029] Optionally, the external pressure difference WY is used to evaluate the waterproof performance of the exterior wall material. If the external pressure difference WY is not evaluated, it will cause damage to the exterior wall, indoor moisture and mildew. According to the permeability evaluation index SP of the exterior wall material and the external pressure difference WY, select suitable waterproof materials and determine the thickness and number of waterproof layers.

[0030] Optionally, the calculation formula of the exterior wall material durability assessment unit is as follows:

[0031] NJ = [SP / (WC×WZ)] 2 ×KF

[0032] in:

[0033] NJ is the durability evaluation index;

[0034] WC is the maintenance cost, including the cost per unit area of ​​materials;

[0035] WZ is the maintenance cycle, WZ reflects the number of maintenance times per year;

[0036] KF is the weathering resistance coefficient;

[0037] The evaluation of the exterior wall material durability evaluation unit is as follows;

[0038] The durability of the material is evaluated by multiplying the permeability evaluation index SP with the inverse of the square of the material maintenance cost WC and the maintenance cycle WZ, and then multiplying it by the weathering resistance coefficient KF, that is, the durability evaluation index NJ. At the same time, the durability evaluation will be fed back to the material selection and the optimization of pore characteristics, so that the results of the exterior wall material durability evaluation unit can cyclically affect the evaluation of the pore structure characteristic unit in the exterior wall material.

[0039] Optionally, the weathering resistance coefficient KF varies according to different geographical requirements of different regions, including seaside, urban and mountainous areas, and the specific variations are as follows;

[0040] For seaside locations, the weathering resistance coefficient KF is required to be higher, and materials with excellent weather resistance, salt spray erosion resistance and high weathering resistance are selected, including high-performance coatings, anti-corrosion wood and special alloys;

[0041] For towns, the weathering resistance coefficient KF requirement is lower than that for the seaside. According to the local climate characteristics, pollution level and specific needs of the building, materials with good durability and weathering resistance are selected, including masonry, concrete and paint.

[0042] For mountainous areas, when considering the altitude, slope, wind direction and risk factors of geological disasters, choose materials with sufficient strength and stability, including stone, wood and concrete.

[0043] Optionally, the evaluation adjustment steps based on the durability evaluation index NJ output by the exterior wall material durability evaluation unit are as follows:

[0044] S1 extracts the average index of the durability evaluation index NJ of the same detection method in the past two years and similar to the ambient temperature and terrain area of ​​the current house building exterior wall from the data detection module as the evaluation standard, that is, the historical durability evaluation index NJ old The average index of

[0045] S2. If the durability assessment index NJ is lower than the historical durability assessment index NJ old If the average index is lower, it indicates that the material has poor durability. When choosing materials with smaller pore volume KXT and denser pore structure;

[0046] S3. If the durability assessment index NJ is higher than the historical durability assessment index NJ old The average index of indicates that the material has good durability and the current high-durability material should be selected;

[0047] S4. If the durability assessment index NJ is equal to the historical durability assessment index NJ old If the average index is low, it means that the durability of the material is at a medium level. When the durability requirements and application scenarios of the material are analyzed in depth, adjustments should be made based on the pore characteristics.

[0048] Optionally, the microscope and scanning electron microscope are used to observe the microstructure of the exterior wall material;

[0049] The pore property measuring instrument is used to measure the pore volume and surface area, namely, the pore volume KXT and the pore surface area KXB;

[0050] The particle analyzer is used to measure the average diameter and density of particles, namely the average particle diameter KLZ and the particle density KM;

[0051] The permeability tester is used to simulate the pressure difference and measure the permeability rate of the material, that is, the Darcy coefficient d and the external pressure difference WY;

[0052] The weathering tester is used to evaluate the weathering resistance of materials, that is, the weathering resistance coefficient KF;

[0053] The data processing and analysis software is used to calculate the comprehensive porosity characteristic index KXZ, the permeability evaluation index SP and the durability evaluation index NJ, and to perform data analysis.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] 1. The unit for evaluating the pore structure characteristics of exterior wall materials of the present invention comprehensively evaluates the pore characteristics of exterior wall materials, thereby revealing the microstructural characteristics of the materials in a more comprehensive manner, while the unit for evaluating the permeability of exterior wall materials quantifies the permeability performance of the materials, providing a scientific basis for evaluating the waterproof performance of exterior wall materials. Finally, the unit for evaluating the durability of exterior wall materials further organically combines the pore characteristics, permeability and durability, comprehensively evaluates the durability of exterior wall materials during long-term use, and provides comprehensive guidance for the selection and maintenance of exterior wall materials.

[0056] 2. The present invention converts porosity, permeability and durability into comparable numerical indicators through specific calculation formulas and parameter settings, reducing the subjectivity and uncertainty in the evaluation process. The quantitative evaluation method can more accurately reflect the performance characteristics of the material, providing a reliable basis for scientific decision-making, and enabling direct comparison of evaluation results of different materials and the same material under different conditions, thereby facilitating material screening and performance optimization.

[0057] 3. The present invention can select exterior wall materials more scientifically through evaluation results, avoiding performance deficiencies or cost waste caused by blind selection and reliance on experience. At the same time, it can also optimize material combinations and structural designs according to the evaluation results to improve the overall performance of the building.

[0058] 4. The present invention can also provide a scientific basis for quality control in the construction process through the evaluation results, ensuring that the construction quality meets the design requirements. In the later maintenance management, the evaluation results can guide maintenance personnel to take reasonable maintenance measures and strategies to extend the service life of the building and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 This is a flow chart of the method for detecting the exterior wall of a building;

[0060] Figure 2 A schematic diagram of data collected and tested for the present invention;

[0061] Figure 3 A data schematic diagram for historical data extraction of the present invention;

[0062] Figure 4 It is a structural schematic diagram of the data evaluation processing module of the present invention. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] Regarding the exterior wall inspection method of this building, it is different from the existing exterior wall inspection methods. The evaluation of the existing exterior wall inspection methods mainly relies on experience judgment or simple physical performance tests. These methods are often difficult to fully and accurately reflect the comprehensive performance of exterior wall materials. This algorithm unit effectively solves the problems and shortcomings of the existing technology by constructing a comprehensive evaluation system, adopting quantitative evaluation methods, optimizing material selection and guiding construction and maintenance, and realizes a comprehensive and accurate evaluation of the performance of exterior wall materials.

[0065] For example, see Figures 1 to 4 This embodiment provides a building exterior wall detection method, which is characterized in that the specific detection steps are as follows:

[0066] Using the data detection module, the test data of pore volume KXT, pore surface area KXB, average particle diameter KLZ, particle density KM, Darcy coefficient d, external pressure difference WY, material thickness CH and weathering resistance coefficient KF are respectively detected and experimentally obtained;

[0067] Combine the maintenance cost WC, maintenance cycle WZ and inspection data of the building exterior wall historical data, and use the data evaluation processing module to evaluate the porosity characteristics, permeability and durability;

[0068] Comprehensively analyze the test and evaluation results of porosity characteristics, permeability and durability to evaluate the overall performance of the exterior wall, and make corresponding repair, renovation and reinforcement suggestions based on the evaluation results;

[0069] The data evaluation processing module includes a unit for evaluating the pore structure characteristics of the exterior wall material, a unit for evaluating the permeability of the exterior wall material, and a unit for evaluating the durability of the exterior wall material;

[0070] The equipment used in the data detection module includes microscopes and scanning electron microscopes, pore characteristic measuring instruments, particle analyzers, permeability testers, and weather resistance testers;

[0071] The equipment used in the data evaluation and processing module includes data processing and analysis software;

[0072] Microscopes and scanning electron microscopes are used to observe the microstructure of exterior wall materials;

[0073] The pore property measuring instrument is used to measure the pore volume and surface area, namely, the pore volume KXT and the pore surface area KXB;

[0074] The particle analyzer is used to measure the average diameter and density of particles, namely the average particle diameter KLZ and the particle density KM;

[0075] The permeability tester is used to simulate the pressure difference and measure the permeability rate of the material, that is, the Darcy coefficient d and the external pressure difference WY;

[0076] The weathering tester is used to evaluate the weathering resistance of materials, that is, the weathering resistance coefficient KF;

[0077] The data processing and analysis software is used to calculate the comprehensive porosity characteristic index KXZ, the permeability evaluation index SP and the durability evaluation index NJ, and to perform data analysis.

[0078] In this embodiment, the system can systematically detect and evaluate the exterior walls of building buildings through the mutual cooperation of three algorithm units, combined with the three calculation results of KXZ, SP and NJ, to provide a scientific basis for subsequent maintenance, renovation and reinforcement. KXZ is a comprehensive index of pore characteristics. Through this index, the potential impact of the internal pore structure of the material on the material performance can be understood. SP is a permeability evaluation index. This index takes into account the pore characteristics of the material, the inherent permeability coefficient of the material, the thickness of the material and the external pressure difference, and provides a direct and effective means for evaluating the permeability of the exterior wall material. NJ is a durability evaluation index, which comprehensively considers the factors of the permeability, maintenance cost and weathering resistance of the material, and provides a comprehensive perspective for evaluating the durability of the exterior wall material. The calculation results of NJ can also affect the calculations fed back to KXZ and SP, so that the three algorithms of this system have a high correlation and entanglement, so that the overall algorithm system can be automatically fed back and optimized according to the actual situation to be closer to reality.

[0079] See also Figures 1 to 4 , the calculation formula for evaluating the pore structure characteristic unit in the exterior wall material is as follows: ;

[0080] in:

[0081] KXZ is the comprehensive index of pore characteristics;

[0082] KXT is the pore volume;

[0083] KXB is the pore surface area;

[0084] The pore volume KXT and pore surface area KXB reflect the basic characteristics of the pore structure. The pore volume KXT affects the density, strength and thermal insulation performance of the material, while the pore surface area KXB is closely related to the adsorption capacity, permeability and reactivity of the material.

[0085] KLZ is the average particle diameter. The average particle diameter KLZ affects the bulk density, porosity and mechanical properties of the material.

[0086] KM is the particle density. The particle density KM is related to the overall density and weight of the material and affects the stability of the pore structure. High-density particles help to enhance the strength and durability of the material.

[0087] The evaluation of the units for assessing the pore structure characteristics in the exterior wall materials is as follows;

[0088] The ratio of pore volume KXT to pore surface area KXB, combined with particle diameter and density, is used to comprehensively evaluate the pore characteristics, namely the pore characteristic comprehensive index KXZ.

[0089] In this embodiment: First, in this algorithm unit, the pore characteristic comprehensive index KXZ deeply reveals how the pore size, shape, distribution and particle characteristics jointly affect the overall performance of the material. For example, small pores increase the surface area of ​​the material, which is conducive to adsorption and reaction, but also increases the permeability. By comprehensively considering the parameters of pore volume, surface area, particle density and average diameter, the pore characteristic comprehensive index KXZ can more comprehensively reflect the microstructure characteristics of the material and provide a precise direction for the optimization of material performance;

[0090] Among many exterior wall materials, materials with higher KXZ values ​​tend to have more optimized pore structures, thus showing better performance, such as higher strength, lower water absorption and better thermal insulation, which enables more accurate selection of suitable materials during the design and construction process;

[0091] The comprehensive porosity index KXZ not only focuses on the performance of the material, but also implies the cost factor of material preparation. By comparing the comprehensive porosity index KXZ values ​​and their costs of different materials, the most cost-effective material can be selected to achieve the best balance between performance and cost.

[0092] In the material research and development stage, the pore characteristic comprehensive index KXZ can be used as an objective function to guide the optimization design of the pore structure. Through simulation and experiment, the production process and formula can be adjusted to obtain materials with better pore characteristic comprehensive index KXZ values. For example, by controlling the particle size and distribution, the pore structure can be optimized and the performance of the material can be improved.

[0093] The comprehensive porosity index KXZ also provides strong support for the development of new materials. When developing new exterior wall materials, their performance can be predicted by evaluating their comprehensive porosity index KXZ value, and further optimization and improvement can be carried out accordingly.

[0094] In summary, the comprehensive porosity index KXZ is an evaluation index of great significance, which can comprehensively reflect the characteristics of the pore structure in exterior wall materials and provide strong support for material selection, design and optimization.

[0095] See also Figures 1 to 4 , the calculation formula for evaluating the permeability unit of the exterior wall material is as follows:

[0096] SP = (d × KXZ × WY) / CH;

[0097] in:

[0098] SP is the permeability assessment index;

[0099] d is the Darcy coefficient, which reflects the permeability of the material itself;

[0100] WY is the external pressure difference, WY reflects the water pressure difference;

[0101] CH is the material thickness;

[0102] The external pressure difference WY is used to evaluate the waterproof performance of the exterior wall materials. If the external pressure difference WY is not evaluated, it will cause damage to the exterior wall, indoor moisture and mildew. According to the permeability evaluation index SP of the exterior wall material and the external pressure difference WY, select the appropriate waterproof material and determine the thickness and number of waterproof layers.

[0103] In this embodiment, first, the Darcy coefficient d is an important parameter describing the permeability of a material, which is usually determined by an experimental method. For liquid permeation, such as water permeation, the permeability coefficient of the material is determined by using the Darcy's law experiment, and a larger Darcy coefficient d indicates that the material is more easily permeable;

[0104] The external pressure difference WY of this algorithm unit is an important parameter for evaluating the permeability of exterior wall materials. By simulating and actually measuring the permeability under different pressure differences, the waterproof performance of exterior wall materials can be accurately evaluated, providing a basis for waterproof design and construction. Water pressure difference is one of the main causes of water seepage in exterior walls. If the permeability of exterior wall materials is not accurately evaluated and the influence of water pressure difference is not fully considered, it will cause water seepage and leakage in the use of buildings, which will lead to a series of problems such as wall damage, indoor moisture and mildew. Therefore, accurate evaluation of water pressure difference is of great significance for preventing water damage. In waterproof design, it is necessary to select appropriate waterproof materials and determine the thickness and number of waterproof layers according to the permeability and water pressure difference of exterior wall materials. By accurately evaluating the water pressure difference, it can ensure that the waterproof design is scientific and reasonable, and improve the waterproof effect and service life.

[0105] The permeability evaluation index SP output by this algorithm unit is an accurate and comparable numerical indicator provided by quantifying the permeability of the material, which enables direct comparison of the permeability performance between different materials and provides a reliable basis for waterproofing design and construction;

[0106] The permeability assessment index SP can also be used to evaluate the changes in the permeability performance of materials under different environmental conditions. By simulating different usage environments, it is possible to understand the permeability performance of materials under different conditions and provide a basis for the selection of waterproofing measures.

[0107] Permeability is one of the key factors affecting material durability. By evaluating the permeability of materials, potential durability problems can be discovered early and corresponding preventive measures can be taken. For example, for materials with strong permeability, waterproofing can be strengthened or other more durable materials can be selected.

[0108] Combined with other durability evaluation indicators, the permeability evaluation index SP can also be used to predict the service life of materials, which helps to formulate reasonable maintenance plans and extend the service life of buildings;

[0109] For materials with high permeability, the permeability assessment index SP can guide the adoption of targeted waterproofing measures. For example, in the design of the waterproof layer, the appropriate waterproofing material and construction method can be selected according to the permeability of the material. In the design of the drainage system, the drainage path and drainage efficiency can be optimized to reduce the risk of penetration. In addition to waterproofing measures for a single material, the permeability assessment index SP can also guide the formulation of a comprehensive waterproofing strategy. By comprehensively considering the permeability of different materials and the overall structural characteristics of the building, a comprehensive and effective waterproofing plan can be formulated.

[0110] See also Figures 1 to 4 , the calculation formula of the exterior wall material durability assessment unit is as follows:

[0111] NJ = [SP / (WC×WZ)] 2 ×KF

[0112] in:

[0113] NJ is the durability evaluation index;

[0114] WC is the maintenance cost, including the cost per unit area of ​​materials;

[0115] WZ is the maintenance cycle, WZ reflects the number of maintenance times per year;

[0116] KF is the weathering resistance coefficient;

[0117] The evaluation of the exterior wall material durability assessment unit is as follows;

[0118] The durability of the material is evaluated by multiplying the permeability evaluation index SP with the inverse of the square of the material maintenance cost WC and the maintenance cycle WZ, and then multiplying it by the weathering resistance coefficient KF, that is, the durability evaluation index NJ. At the same time, the durability evaluation will be fed back to the material selection and the optimization of pore characteristics, so that the results of the exterior wall material durability evaluation unit can cyclically affect the evaluation of the pore structure characteristic unit in the exterior wall material.

[0119] In this embodiment, the weathering resistance coefficient KF in this algorithm unit is a key indicator for measuring the stability of the performance of the material in a harsh environment. A high weathering resistance coefficient KF value means that the material has a stronger weathering resistance and can maintain its original physical, chemical and mechanical properties for a long time, thereby extending the service life of the building. By evaluating the weathering resistance coefficient KF values ​​of different materials, architects and engineers can more scientifically select exterior wall materials suitable for specific environments and uses. At the same time, in the material research and development and design stage, improving the weathering resistance coefficient KF value can also be used as one of the optimization goals to develop more durable exterior wall materials. Exterior wall materials with good durability can reduce waste and energy consumption caused by frequent replacement and maintenance, which is in line with the concept of sustainable development. Therefore, when evaluating the durability of exterior wall materials, the importance of the weathering resistance coefficient KF is self-evident;

[0120] In summary, the weathering resistance coefficient KF plays an important role in the durability assessment unit of exterior wall materials and the detection of exterior walls of houses. It not only directly reflects the durability level of materials, but also affects the selection and design of materials as well as the overall economic benefits and sustainable development of buildings.

[0121] The durability evaluation index NJ output by this algorithm unit not only takes into account the inherent properties of the material, namely permeability and weathering resistance, but also combines economic factors. This multi-dimensional consideration makes the evaluation result more comprehensive and practical. Through the durability evaluation index NJ evaluation, we can fully understand the comprehensive performance of the material during use and its impact on the long-term performance of the building;

[0122] In the durability assessment index NJ evaluation, various factors are interrelated and influence each other. By comprehensively considering the relationship and weights among these factors, a comprehensive evaluation result of material durability can be obtained, which provides strong support for the selection and use of materials.

[0123] By evaluating the durability assessment index NJ of materials, a reasonable long-term maintenance plan can be formulated, which includes determining the maintenance cycle, maintenance content and maintenance cost. A reasonable maintenance plan helps to extend the service life of the building and reduce maintenance costs;

[0124] During the maintenance process, the durability assessment index NJ can also guide the optimization of maintenance strategies. For example, for materials with a low durability assessment index NJ value, monitoring and maintenance efforts can be strengthened, and for materials with a high durability assessment index NJ value, more economical and reasonable maintenance methods can be adopted to reduce maintenance costs.

[0125] The durability and economic factors of materials are taken into account in the durability assessment index NJ assessment, which helps guide people to choose more environmentally friendly and sustainable materials. For example, choosing materials with good durability and low maintenance costs can reduce the environmental impact of the building's entire life cycle, and choosing renewable and recyclable materials can reduce resource consumption and waste generation;

[0126] In order to obtain a higher durability evaluation index NJ value and meet higher performance requirements, researchers will continue to explore new materials, new production processes and new evaluation methods. This technological innovation not only promotes scientific and technological progress in the construction industry, but also promotes the implementation and practice of the concept of sustainable development.

[0127] See also Figures 1 to 4 The evaluation adjustment steps based on the durability evaluation index NJ output by the exterior wall material durability evaluation unit are as follows:

[0128] S1. Extract from the data detection module the average index of the durability evaluation index NJ of the same detection method in the past two years and similar to the ambient temperature and terrain area of ​​the current building exterior wall as the evaluation standard, that is, the historical durability evaluation index NJ old The average index of

[0129] S2. If the durability assessment index NJ is lower than the historical durability assessment index NJ oldIf the average index is lower, it indicates that the material has poor durability. When choosing materials with smaller pore volume KXT and denser pore structure;

[0130] S3. If the durability assessment index NJ is higher than the historical durability assessment index NJ old The average index of indicates that the material has good durability and the current high-durability material should be selected;

[0131] S4. If the durability assessment index NJ is equal to the historical durability assessment index NJ old If the average index is low, it means that the durability of the material is at a medium level. When the durability requirements and application scenarios of the material are analyzed in depth, adjustments should be made based on the pore characteristics.

[0132] In this embodiment, this algorithm unit extracts the average index of the durability assessment index NJ of similar detection methods used in the past two years in the data detection module, which is similar to the ambient temperature and terrain area of ​​the current building exterior wall. It uses comparative evaluation to evaluate the durability assessment index NJ of the current material, so as to understand the performance of the material in actual use, and then provide feedback to the material selection and optimization of pore properties.

[0133] For example, if the same type of building materials in a town are detected, the historical durability assessment index NJ of all the same type of building materials detected in the past two years that meet the geographical requirements of the town will be extracted in the data detection module. old In other words, the durability evaluation index NJ output by the durability evaluation unit of the exterior wall material of this algorithm will also be used as historical data to continuously update the historical durability evaluation index NJ old If the durability of a material is poor, it will be due to its unreasonable pore structure. At this time, the durability of the material can be improved by adjusting the pore structure, that is, optimizing the comprehensive index of pore characteristics KXZ. This cyclic influence mechanism promotes the continuous improvement of the performance of exterior wall materials. With the continuous improvement of the requirements for material durability, people will continue to seek better pore structures and material formulas to meet higher performance requirements.

[0134] The cyclical influence of the durability evaluation unit of exterior wall materials on the unit for evaluating the pore structure characteristics in exterior wall materials has also promoted the innovation and development of related technologies. In order to obtain a higher durability evaluation index NJ value, researchers will continue to explore new materials, new production processes and new evaluation methods to promote scientific and technological progress in the construction industry.

[0135] In addition, the historical durability assessment index NJ oldThe average index is the relevant data stored in the historical data, and the current durability evaluation index NJ will extract the corresponding similar data according to the different ambient temperature and terrain areas of the exterior wall of the house building. The currently output durability evaluation index NJ will also be used as a subsequent reference standard, and after a certain period of accumulation, combined with the accumulated durability evaluation index NJ, and according to the different ambient temperature and terrain areas of the exterior wall of the house building, the corresponding historical durability evaluation index NJ will be updated. old The average index.

[0136] For example 2, please refer to Figures 1 to 4 , the weathering resistance coefficient KF varies according to different geographical requirements of different regions, including seaside, urban and mountainous areas, and the specific changes are as follows;

[0137] For seaside locations, the weathering resistance coefficient KF is required to be higher, and materials with excellent weather resistance, salt spray erosion resistance and high weathering resistance are selected, including high-performance coatings, anti-corrosion wood and special alloys;

[0138] For towns, the weathering resistance coefficient KF requirement is lower than that for the seaside. According to the local climate characteristics, pollution level and specific needs of the building, materials with good durability and weathering resistance are selected, including masonry, concrete and paint.

[0139] For mountainous areas, when considering the altitude, slope, wind direction and risk factors of geological disasters, choose materials with sufficient strength and stability, including stone, wood and concrete.

[0140] In this embodiment, the seaside area is usually characterized by high temperature, high humidity, and a lot of salt fog, which puts higher requirements on the weathering resistance of the exterior wall material. In such an environment, the weather resistance of the material is particularly important. Therefore, the weathering resistance coefficient KF value of the seaside area generally needs to be higher to ensure that the material can resist adverse factors such as salt fog erosion, humidity and ultraviolet radiation;

[0141] The climatic conditions in urban areas are relatively diverse, but usually not as bad as those in coastal areas. However, pollution and acid rain in cities can also cause certain damage to materials. In urban areas, the specific value of the weathering resistance coefficient KF will vary according to the local climate characteristics, pollution level and specific needs of the building, but in general, the requirements may be slightly lower than those in coastal areas. In urban areas, the materials selected usually have good durability and certain weathering resistance, which can meet the needs of general urban environments.

[0142] The climatic conditions in mountainous areas are changeable, including extreme weather such as severe cold, scorching heat, strong winds, rain and snow. In addition, there are risk factors of geological disasters in mountainous areas. In mountainous areas, the specific value of the weathering resistance coefficient KF will be affected by many factors, such as altitude, slope, and wind direction. Therefore, when selecting exterior wall materials, it is necessary to fully consider the impact of these factors on the weathering resistance of the material in order to cope with severe climatic conditions and possible geological disasters;

[0143] To sum up, the specific values ​​and changes of the weathering resistance coefficient KF in different regions are the result of the combined influence of multiple factors. When selecting exterior wall materials, it is necessary to comprehensively consider local climatic conditions, environmental factors and the specific needs of the building. At the same time, with the continuous advancement of science and technology and the emergence of new materials, the specific values ​​and evaluation methods of the weathering resistance coefficient KF will also be continuously updated and improved. Therefore, in actual applications, it is necessary to pay close attention to industry trends and technological developments to ensure that the weathering resistance of exterior wall materials can meet actual needs.

[0144] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for detecting the exterior wall of a building, characterized in that: The specific detection steps are as follows: Using the data detection module, the test data of pore volume KXT, pore surface area KXB, average particle diameter KLZ, particle density KM, Darcy coefficient d, external pressure difference WY, material thickness CH and weathering resistance coefficient KF are respectively detected and experimentally obtained; Combine the maintenance cost WC, maintenance cycle WZ and inspection data of the building exterior wall historical data, and use the data evaluation processing module to evaluate the porosity characteristics, permeability and durability; Comprehensively analyze the test and evaluation results of porosity characteristics, permeability and durability to evaluate the overall performance of the exterior wall, and make corresponding repair, renovation and reinforcement suggestions based on the evaluation results; The data evaluation processing module includes a unit for evaluating the pore structure characteristics of the exterior wall material, a unit for evaluating the permeability of the exterior wall material, and a unit for evaluating the durability of the exterior wall material; The equipment used in the data detection module includes a microscope, a pore characteristic measuring instrument, a particle analyzer, a permeability tester, and a weather resistance tester; The equipment used in the data evaluation and processing module includes data processing and analysis software; The calculation formula for evaluating the pore structure characteristic unit in the exterior wall material is as follows: ； in: KXZ is the comprehensive index of pore characteristics; KXT is the pore volume; KXB is the pore surface area; The pore volume KXT and pore surface area KXB reflect the basic characteristics of the pore structure. The pore volume KXT affects the density, strength and thermal insulation performance of the material, while the pore surface area KXB is closely related to the adsorption capacity, permeability and reactivity of the material. KLZ is the average particle diameter. The average particle diameter KLZ affects the bulk density, porosity and mechanical properties of the material. KM is the particle density. The particle density KM is related to the overall density and weight of the material and affects the stability of the pore structure. High-density particles help to enhance the strength and durability of the material. The evaluation of the unit for evaluating the pore structure characteristics in the exterior wall material is as follows; The ratio of pore volume KXT to pore surface area KXB is used, combined with the diameter and density of the particles, to comprehensively evaluate the characteristics of the pores, namely the comprehensive pore characteristic index KXZ; The calculation formula for evaluating the permeability unit of the exterior wall material is as follows: SP = (d × KXZ × WY) / CH; in: SP is the permeability assessment index; d is the Darcy coefficient, which reflects the permeability of the material itself; WY is the external pressure difference, WY reflects the water pressure difference; CH is the material thickness; The external pressure difference WY is used to evaluate the waterproof performance of the exterior wall material. If the external pressure difference WY is not evaluated, it will cause damage to the exterior wall, indoor moisture and mildew. According to the permeability evaluation index SP of the exterior wall material and the external pressure difference WY, select the appropriate waterproof material and determine the thickness and number of waterproof layers; The calculation formula of the exterior wall material durability assessment unit is as follows: NJ=[SP / (WC×WZ)] 2 ×KF in: NJ is the durability evaluation index; WC is the maintenance cost, including the cost per unit area of ​​materials; WZ is the maintenance cycle, WZ reflects the number of maintenance times per year; KF is the weathering resistance coefficient; The evaluation of the exterior wall material durability evaluation unit is as follows; The durability of the material is evaluated by multiplying the permeability evaluation index SP by the inverse of the square of the material maintenance cost WC and the maintenance cycle WZ, and then multiplying it by the weathering resistance coefficient KF, that is, the durability evaluation index NJ. At the same time, the durability evaluation will be fed back to the material selection and the optimization of the pore characteristics, so that the results of the exterior wall material durability evaluation unit can cyclically affect the evaluation of the pore structure characteristics unit in the exterior wall material; The weathering resistance coefficient KF varies according to different geographical requirements of different regions, including seaside, urban and mountainous areas, and the specific changes are as follows: For seaside locations, the weathering resistance coefficient KF is required to be higher, and materials with excellent weather resistance, salt spray erosion resistance and high weathering resistance are selected, including high-performance coatings, anti-corrosion wood and special alloys; For towns, the weathering resistance coefficient KF requirement is lower than that for the seaside. According to the local climate characteristics, pollution level and specific needs of the building, materials with good durability and weathering resistance are selected, including masonry, concrete and paint. For mountainous areas, consider the altitude, slope, wind direction and risk factors of geological disasters, and choose materials with sufficient strength and stability, including stone, wood and concrete; The evaluation adjustment steps based on the durability evaluation index NJ output by the exterior wall material durability evaluation unit are as follows: S1. Extract the durability evaluation index NJ from the data detection module, which uses the same detection method and is similar to the ambient temperature and terrain area of ​​the current building exterior wall as the evaluation standard, that is, the historical durability evaluation index NJ old ; S2. If the durability assessment index NJ is lower than the historical durability assessment index NJ old , it indicates that the durability of the material is poor, and it is better to choose a material with a smaller pore volume KXT and a denser pore structure; S3. If the durability assessment index NJ is higher than the historical durability assessment index NJ old , it indicates that the durability of the material is good, and the current high-durability material should be selected; S4. If the durability assessment index NJ is equal to the historical durability assessment index NJ old , it indicates that the durability of the material is at a medium level. When the durability requirements and application scenarios of the material are analyzed in depth, adjustments should be made based on the pore characteristics.

2. A building exterior wall detection method according to claim 1, characterized in that: The microscope is used to observe the microstructure of the exterior wall material; The pore property measuring instrument is used to measure the pore volume and surface area, namely, the pore volume KXT and the pore surface area KXB; The particle analyzer is used to measure the average diameter and density of particles, namely the average particle diameter KLZ and the particle density KM; The permeability tester is used to simulate the pressure difference and measure the permeability rate of the material, that is, the Darcy coefficient d and the external pressure difference WY; The weathering tester is used to evaluate the weathering resistance of materials, that is, the weathering resistance coefficient KF; The data processing and analysis software is used to calculate the comprehensive porosity characteristic index KXZ, the permeability evaluation index SP and the durability evaluation index NJ, and to perform data analysis.

Images