A method and system for resource treatment of construction waste

Abstract

The present invention relates to the technical field of construction waste, specifically a method for recycling construction waste, the method comprising the following steps: randomly selecting an abandoned construction area, classifying the waste in the abandoned construction area, and obtaining a first classification result of the abandoned construction area; screening the first classification result, and obtaining a second classification result of the abandoned construction area; establishing a crushing pressure prediction model according to the abandoned construction area and the second classification result, analyzing the crushing force corresponding to the second classification result through the crushing pressure prediction model; processing the second classification result based on the crushing force, and introducing a waste purification device to obtain target construction waste resources. The construction waste of the present invention can be effectively recycled, which not only reduces the environmental burden, but also realizes the recycling of construction resources, provides impetus for the greening process of the construction industry, reduces the cost of construction projects, and improves economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of construction waste, and in particular to a method and system for resource processing of construction waste. Background Art

[0002] With the vigorous development of my country's economy and the accelerating pace of urbanization, the scale of infrastructure construction has continued to expand, resulting in a large amount of construction waste. According to statistics, the amount of waste generated by construction projects each year is as high as hundreds of millions of tons, far exceeding the waste generated by residents' lives. This rapid growth reflects the rapid development of my country's construction field, and also highlights a problem that needs to be solved urgently - the proper treatment and resource utilization of construction waste.

[0003] At present, many construction projects choose to transport construction waste to the suburbs for landfill or dumping for economic benefits. This practice not only damages the ecological environment and affects the overall layout of the city, but also brings serious environmental safety hazards. A large amount of untreated construction waste not only occupies precious land resources, but also may cause immeasurable pollution and damage to the soil, water and air.

[0004] Faced with a huge amount of construction waste, if it cannot be effectively treated and recycled, it will bring great harm to the environment and society. Therefore, it is urgent to formulate and implement an effective construction waste resource treatment method to transform a large amount of construction waste into usable resources and realize the reuse of construction waste, which is not only conducive to my country's strategic goal of sustainable development and solving environmental pollution problems, but also can transform construction waste into usable resources for reuse, which is of great significance to promoting the construction of ecological civilization and the development of green buildings. Summary of the invention

[0005] In view of the shortcomings of existing methods and the needs of practical applications, the present invention performs multiple classification, crushing and purification treatments on construction waste to achieve effective transformation of construction waste resources, reduce environmental pressure and promote the recycling of construction resources, and inject new technologies into the green transformation of the construction industry. On the one hand, the present invention provides a method for resource treatment of construction waste, which includes the following steps: randomly selecting an abandoned building area, classifying the waste in the abandoned building area, and obtaining a first classification result of the abandoned building area; screening the first classification result, and obtaining a second classification result of the abandoned building area; establishing a crushing pressure prediction model according to the abandoned building area and the second classification result, and analyzing the crushing force corresponding to the second classification result through the crushing pressure prediction model; processing the second classification result based on the crushing force, and introducing a waste purification device to obtain the target construction waste resources. The present invention classifies and screens abandoned construction waste, ensures that different types of waste are properly treated, and selects a suitable crushing force through a crushing pressure prediction model, which helps to reduce unnecessary energy consumption and improve the efficiency of the use of construction waste resources.

[0006] Optionally, the classifying the waste in the abandoned building area and obtaining a first classification result of the abandoned building area includes: classifying the waste based on the type of construction waste and obtaining a first classification result of the abandoned building area. The present invention classifies the waste in the abandoned building area based on the type of construction waste, which helps to improve the waste recycling efficiency, resource utilization, environmental protection level and economic benefits, and promotes the sustainable development of the construction industry.

[0007] Optionally, the filtering of the first classification result and obtaining the second classification result of the abandoned building area includes: installing construction waste sorting equipment; using the construction waste sorting equipment to filter the first classification result and obtain a screening result corresponding to the first classification result; and combining the screening result to obtain the second classification result of the abandoned building area. The present invention uses the construction waste sorting equipment to filter the first classification result, which can improve the accuracy and processing efficiency of the classification result, reduce the secondary pollution of waste, improve resource utilization, and can be adapted to abandoned building environments of different sizes.

[0008] Optionally, the crushing pressure prediction model satisfies the following relationship:

[0009]

[0010] Where, f represents the compressive strength of recycled construction waste, v represents the total volume of construction waste, σ represents the strain modulus of construction waste, represents the average density of construction waste, τ represents the compression failure coefficient of construction waste, M represents the total mass of construction waste, r 1 represents the actual average diameter of construction waste, r 2 It represents the target evaluation diameter of construction waste. The present invention predicts the compressive strength of recycled construction waste based on multiple parameters, which cover multiple important properties of waste materials, thereby ensuring the accuracy of pressure prediction results.

[0011] Optionally, analyzing the crushing force corresponding to the second classification result by the crushing pressure prediction model includes: analyzing the compressive strength corresponding to the second classification result by using the crushing pressure prediction model; and matching the crushing force corresponding to the second classification result according to the compressive strength. The present invention determines the crushing force required for different wastes by the compressive strength corresponding to different classification results, thereby avoiding the occurrence of over-crushing or under-crushing, etc., and thus improving the efficiency of the waste crushing process.

[0012] Optionally, processing the second classification result based on the crushing force includes: introducing construction waste crushing equipment; processing the second classification result based on the crushing force and the construction waste crushing equipment. The invention introduces construction waste crushing equipment to improve processing efficiency, optimize product quality, reduce operating difficulty and reduce secondary environmental pollution, and promote the recycling of construction resources.

[0013] Optionally, the processing of the second classification result based on the crushing strength further includes: performing waste crushing processing on the second classification result according to the construction waste crushing equipment and the crushing strength to obtain initial construction waste resources of different particle sizes. The present invention crushes the second classification result through construction waste crushing equipment and crushing strength, which can improve the utilization rate of construction resources, meet diversified needs, promote circular economy, improve product quality, and help promote the process of resource utilization of construction waste and achieve sustainable development goals.

[0014] Optionally, the introduction of a waste purification device to obtain target construction waste resources includes: using the waste purification device to purify the initial construction waste resources, and the waste purification device includes a magnetic separator and a wind separator. The magnetic separator and wind separator of the present invention purify the initial construction waste resources, which can improve the purity and utilization value of the resources, reduce environmental pollution, and promote the development of a circular economy.

[0015] Optionally, the introduction of the waste purification device to obtain the target construction waste resources includes: removing dust and iron materials from the initial construction waste resources by the magnetic separator and the wind separator to obtain the target construction waste resources. The present invention can reduce the degree of environmental pollution by removing dust from the recycled resources, while improving the physical properties of the recycled resources, and removing iron materials can prevent the influence of impurities on the performance of the recycled building materials, making the recycled building materials more uniform and stable.

[0016] In the second aspect, in order to efficiently execute the resource treatment method of construction waste provided by the present invention, the present invention also provides a resource treatment system for construction waste, including a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the resource treatment method for construction waste as described in the first aspect of the present invention. The resource treatment system for construction waste of the present invention has a compact structure and stable performance, and can stably execute the resource treatment method for construction waste provided by the present invention, thereby improving the overall applicability and practical application ability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of the resource treatment method for construction waste of the present invention;

[0018] Figure 2 This is a schematic diagram of a first classification result of the resource treatment method for construction waste of the present invention;

[0019] Figure 3 It is a schematic diagram of the second classification result of the resource treatment method of construction waste of the present invention;

[0020] Figure 4 It is a schematic diagram of the initial construction waste resources of the construction waste resource treatment method of the present invention;

[0021] Figure 5 This is a structural diagram of the resource processing system for construction waste of the present invention. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not need to be adopted to implement the present invention. In other examples, in order to avoid confusing the present invention, known circuits, software or methods are not specifically described.

[0023] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or subcombination. In addition, it should be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale.

[0024] See also Figure 1 In order to effectively treat construction waste and avoid a large amount of resource waste, the waste is properly classified, crushed and purified, dust and iron pollution to the environment are reduced, and effective treatment and resource utilization of construction waste are achieved to adapt to the current environmental, economic and social conditions, which is conducive to the sustainable development of the construction industry. The present invention provides a resource treatment method for construction waste, which comprises the following steps:

[0025] S1. Randomly select an abandoned building area, classify the waste in the abandoned building area, and obtain a first classification result of the abandoned building area. The specific implementation steps and contents are as follows:

[0026] In this embodiment, the waste is classified based on the type of construction waste, and a first classification result of the abandoned construction area is obtained, wherein the construction waste classification basis can be classified according to the source of generation, physical property composition and future utilization capacity of the construction waste.

[0027] In this implementation case, the first classification of construction waste can be carried out according to multiple dimensions such as the source, material type, purpose, and treatment method of construction waste, which helps to understand the characteristics of construction waste more accurately and provide a scientific basis for the subsequent treatment and practical utilization of construction waste.

[0028] In addition, the classification of construction waste can also be carried out according to factors such as the generation stage of the waste, the treatment method, and the reuse potential. In an optional embodiment, the construction waste is classified according to the generation stage, and can be specifically divided into construction waste, demolition waste, etc.; classified according to the treatment method, it can be divided into recyclable waste, non-recyclable waste, hazardous waste, etc.; classified according to the material reuse potential, it can be divided into high-value waste, general-value waste, and low-value waste, etc. Different waste classification standards help to more comprehensively understand the characteristics of waste and the treatment and transformation needs, and provide strong support for the reduction, resource utilization and harmless treatment of waste.

[0029] In this embodiment, the first classification of construction waste is also visualized. Using visualization methods such as charts, images or pie charts, the classification of construction waste can be intuitively displayed, and the quantity, proportion and distribution of each type of waste can be quickly and clearly understood, which helps to quickly obtain the quantity of waste of different categories and identify the reuse value of waste of different categories, so as to formulate more reasonable and effective waste treatment and management strategies. Furthermore, based on the visualization information, the material categories and characteristic attributes of different wastes can be quickly screened, reducing the time of manual analysis and processing, and improving the efficiency of waste treatment. For details, please refer to Figure 2 , where F1 represents the first classification procedure of waste, a, b, c, and d represent different types of construction waste respectively. In an optional embodiment, construction waste can be classified according to its source, which helps to better understand and manage different types of construction waste and provide guidance for subsequent resource processing and reuse procedures. Construction waste can be roughly divided into: land excavation waste, which mainly comes from excavation activities in the process of land development, mainly including soil, stones, sand, etc.; road excavation waste, which mainly comes from excavation activities in the process of road construction and maintenance, including but not limited to concrete fragments, asphalt fragments, bricks and stones, etc.; old building demolition waste, which mainly comes from waste generated when demolishing old buildings, mainly including concrete blocks, bricks and tiles, wood, glass, etc.; construction waste, which mainly comes from waste generated in the process of construction, mainly including construction waste, discarded building materials, packaging materials, etc.; decoration waste, which mainly comes from waste generated in the process of house decoration, including but not limited to discarded furniture, decorative materials, coatings, electrical appliances, etc. Classifying construction waste according to its source can provide a clearer understanding of the characteristics and properties of different construction wastes, and provide targeted solutions for subsequent resource processing and reuse, thereby promoting the sustainable utilization of construction waste.

[0030] In an optional embodiment, the construction waste in the abandoned building area is preliminarily classified. In order to ensure the feasibility and practical operability of the first classification content, the construction waste is roughly divided into six categories, which not only helps the subsequent resource processing and reuse, but also improves the efficiency and implementation effect of the entire processing process. It can more accurately identify and manage different types of construction waste, laying a solid foundation for subsequent resource utilization. Please see Table 1 for a visual display of the classification of construction waste.

[0031] Table 1

[0032] Classification group number Classification Type Main ways of using resources 1 Soil, waste soil Can be used for backfilling or mountain landscaping and greening 2 Concrete blocks, broken bricks and tiles, mortar Roadbed cushion, recycled concrete aggregate, filler 3 Wood, cardboard and paper materials Combustion, composite materials 4 Glass, plastic Can be further processed into glass-ceramics or plastic particles 5 Steel, scrap metal Re-melted and reprocessed into materials of various specifications 6 asphalt Recycled asphalt concrete

[0033] Classification table of construction waste types

[0034] Furthermore, the multi-angle and multi-dimensional first classification of construction waste in this embodiment is only an optional condition of the present invention. In one or some other embodiments, the classification method of construction waste can be adjusted according to the actual situation of the detection area and the waste status, so as to have a more comprehensive understanding of the characteristics and treatment requirements of the waste, and provide strong guarantees for the scientific management and effective treatment of the waste.

[0035] On the other hand, construction waste is mainly composed of waste bricks, waste concrete, waste mortar, etc. The total amount of construction waste occupied by different components is different, and it will also change due to differences in engineering structure and different levels of on-site management, that is, there are differences in the output and composition ratio of waste in different construction projects and construction sites. Some construction projects using traditional construction methods will produce more waste bricks, while projects using modern construction technology will produce more waste concrete and mortar. During the demolition and construction of buildings, a large amount of waste bricks, concrete, mortar and other building materials will be generated. Therefore, in actual projects, construction waste should be scientifically and reasonably classified and treated according to the specific conditions of the abandoned construction area to maximize the utilization of construction resources and minimize the impact on the environment.

[0036] In an optional embodiment, data collection, statistics and tabular processing are performed based on the first classification result of the abandoned building area to better understand and utilize the waste in the abandoned building area. The information on the classification quantity, proportion and percentage of the construction waste in the embodiment is shown in Table 2:

[0037] Table 2

[0038]

[0039] Table of waste quantity and composition information in abandoned building areas

[0040] According to Table 2, we can more clearly control and understand the different types and proportions of waste in abandoned construction areas, improve the readability and utilization of waste classification data, and provide strong support for the scientific management and effective treatment of construction waste.

[0041] The specific composition ratio of construction waste after demolition will also change due to the building structure form. Please refer to Table 3 for a list of the composition and ratio of construction waste per square meter under the building structure form of the embodiment.

[0042] Table 3

[0043]

[0044] Table of components and proportions of construction waste per square meter

[0045] Based on the data in Table 3, the reinforced concrete structures in the abandoned building area can be analyzed, among which the reinforced concrete structures mainly contain a large amount of concrete fragments, steel bars, bricks and tiles, etc.; the wooden structure buildings mainly contain materials such as wood, nails, and paint. Based on the different composition ratios of different structural types, the types and quantities of waste generated by different building structures during the demolition process can be reflected, thereby providing data support for the subsequent classification management of construction waste and resource recycling, so as to achieve effective utilization of construction resources and environmental protection.

[0046] S2, screening based on the first classification result of step S1, and obtaining the second classification result of the abandoned building area, the specific implementation steps and contents are as follows;

[0047] Installing construction waste sorting equipment is an important step in the waste management and resource recovery process of abandoned construction areas. In the embodiment, the construction waste sorting equipment can screen and classify different types of construction waste by size. It is further necessary to match reasonable waste sorting equipment and set the corresponding number of equipment according to the first classification result of construction waste, wherein the first classification result includes but is not limited to the quantity and composition of construction waste and the components and proportions of each square meter of waste.

[0048] The above-mentioned construction waste sorting equipment is mainly used for diameter screening of waste. According to the specific conditions of the abandoned construction area, one or more construction waste sorting equipment is installed to screen the diameters of different types of construction waste and classify them into construction waste of different types and different diameters.

[0049] The first classification result is screened by using the above-mentioned construction waste sorting equipment, and the screening result corresponding to the first classification result is obtained. The second classification result of the abandoned building area is obtained by combining the screening results of different construction wastes. The specific implementation content is as follows:

[0050] In an optional embodiment, a drum screening machine can be used to screen the diameters of different types of construction waste. The above equipment can classify the waste into different diameter grades according to its diameter. Smaller waste can fall through the screen, while larger waste will be separated by the drum to another outlet. At the same time, the smaller waste and larger waste will be transported to another drum screening machine respectively, and finally smaller waste, smallest waste, larger waste and largest waste will be obtained, thereby separating waste of different sizes to facilitate subsequent resource recycling and treatment. Please refer to Figure 3 , where F2 represents the second classification procedure of waste, a, b, c, d represent different types of construction waste respectively, a1, b1, c1, d1, a2, b2, c2, d2 represent the classification results of construction waste of different diameters corresponding to different types respectively, where a represents that after the construction waste is processed by the second classification procedure, a1 construction waste, a2 construction waste and other diameters of construction waste can be obtained.

[0051] In another optional embodiment, other types of size sorting equipment may be installed according to the actual situation and classification needs of the abandoned building area, including but not limited to magnetic separators, air separators, etc. The magnetic separator can separate the construction waste containing metals, while the air separator can sort the waste according to its density and weight. Different equipment can be selected and combined according to the specific waste composition and processing requirements.

[0052] In this embodiment, by installing appropriate construction waste sorting equipment based on the actual conditions of the abandoned construction area and the first classification results, different types of construction waste can be effectively managed and scientifically recycled, thereby improving the resource utilization efficiency of construction waste, reducing environmental pollution, and helping to promote the sustainable development of the construction industry.

[0053] Furthermore, the waste screening equipment and treatment method used in this embodiment are only an optional condition of the present invention. In one or some other embodiments, the waste screening equipment and the corresponding treatment steps can be adjusted according to actual conditions and screening requirements. Different wastes require different screening and treatment methods. By adjusting the equipment and treatment steps, it can be ensured that the treatment method matches the waste characteristics, thereby improving the classification and treatment effect of construction waste.

[0054] S3, establishing a crushing pressure prediction model according to the abandoned building area and the second classification result of step S2, and analyzing the crushing force corresponding to the second classification result through the crushing pressure prediction model, and the specific implementation steps and contents are as follows:

[0055] In order to effectively crush different types of waste in different abandoned building areas, improve crushing efficiency, avoid the operation of waste equipment at too high or too low pressure, reduce unnecessary energy consumption, and help reduce the economic cost of waste resource utilization.

[0056] First, a crushing pressure prediction model is established based on the abandoned building area and the second classification result of step S2, and its specific implementation content is as follows:

[0057] Organize the relevant information of the abandoned building area, including but not limited to the type, structure, material composition, etc. of the building, and collect the relevant data of the second classification result in step S2, mainly including the diameter screening criteria, classification results and related physical and chemical properties of different wastes, and then clean, screen and format all the collected data to ensure the quality and consistency of the relevant data, mainly including the removal of duplicate data, processing of missing values, standardization of data range and other processing methods.

[0058] Characteristic information related to the waste crushing pressure strength is selected from the pre-processed data. The above characteristic information mainly includes the type, density, hardness, strain capacity, humidity and compression coefficient of the waste. Based on this, the correlation between construction waste and mechanical crushing strength is further analyzed and established.

[0059] Specifically, a suitable model can be selected and constructed according to the characteristic attributes and data features of construction waste. Common models include but are not limited to linear regression, decision tree, random forest, neural network, etc. The key parameters and model structure of the model are adjusted based on the actual situation and data status of the abandoned building area, so that it can accurately predict the crushing pressure of different abandoned building areas and different construction waste.

[0060] Furthermore, the crushing pressure prediction model is trained using the collected construction waste data, and the performance of the model is optimized through cross-validation, adjustment of hyperparameters and other methods. At the same time, an independent waste test data set can be used to verify the predictive ability of the above model. In addition, historical data and prediction results are used to evaluate the prediction accuracy, stability and generalization ability of the model. If the performance of the model is not good, the model can be optimized by adjusting the model structure, adding features, introducing regularization and other methods. At the same time, a corresponding monitoring and feedback mechanism is established to ensure the continued effectiveness and accuracy of the model performance.

[0061] The above crushing pressure prediction model satisfies the following relationship:

[0062]

[0063] Where, f represents the compressive strength of recycled construction waste, v represents the total volume of construction waste, σ represents the strain modulus of construction waste, represents the average density of construction waste, τ represents the compression failure coefficient of construction waste, M represents the total mass of construction waste, r 1 represents the actual average diameter of construction waste, r 2 Represents the target evaluation diameter of construction waste.

[0064] The compressive strength of recycled construction waste refers to the maximum pressure that the recycled construction waste materials obtained after preliminary screening can withstand when subjected to a compressive load. It can directly reflect the bearing capacity of recycled construction waste to resist external crushing pressure. Compressive strength is one of the important indicators for evaluating the performance of recycled construction waste. It is related to factors such as the composition, structure, morphology, processing method, and blending ratio of construction waste. On the other hand, the use scope and application scenarios of different types of construction waste can also be confirmed based on their compressive strength grades to meet the use requirements of construction projects.

[0065] The above-mentioned compression damage coefficient of construction waste needs to satisfy the following relationship:

[0066]

[0067] Among them, τ represents the compression failure coefficient of construction waste, γ represents the radial normal stress index of construction waste, Q represents the stress crushing energy, s represents the average cross-sectional area of ​​construction waste, and k represents the tangential normal stress received by construction waste.

[0068] The radial normal stress index of construction waste refers to the normal stress of construction waste along the radial direction, that is, the tensile or compressive force from the center to the periphery or in the opposite direction. It can be used to describe the relevant performance or behavior of construction waste when subjected to radial stress, and can further obtain the compression failure coefficient of construction waste.

[0069] Stress crushing energy can be used to describe the ability of construction waste to absorb energy during the process of breaking or crushing. It can also be used as an evaluation index of the fracture toughness of different construction waste. When construction waste is subjected to external forces, stress will be generated inside it. As the stress increases, the construction waste will break, fracture or crush. In the above process, the construction waste will absorb a certain amount of energy. This part of energy is called stress crushing energy. Based on this, the compressive strength of different construction waste can be obtained more accurately.

[0070] The average cross-sectional area of ​​construction waste refers to the average cross-sectional area of ​​each fragment or particle obtained after the construction waste is cut or crushed in a certain direction. It can be used to describe the particle size distribution and shape characteristics of different types of construction waste. In the process of construction waste treatment and reuse, the average cross-sectional area is of great reference significance for determining the applicability, crushing efficiency and recycling performance of construction waste.

[0071] The tangential normal stress of construction waste reception refers to the normal stress acting on the particles or fragments of construction waste in the tangential direction. In the process of resource treatment and reuse of construction waste, understanding the tangential normal stress between particles or between particles and equipment is of great significance for evaluating material flow properties, crushing efficiency, wear behavior, etc. When crushing construction waste, the tangential normal stress between particles may cause mutual friction and wear between particles, thereby affecting the performance of the crushing equipment and the crushing results of the waste.

[0072] The total volume of construction waste refers to the volume data corresponding to different types of waste in the second classification results after preliminary screening and treatment. By measuring and recording the volume of different types of construction waste, it can provide basic data information for the treatment, utilization and resource processing of different types of construction waste, which is helpful to formulate scientific and reasonable waste management plans, reduce the impact of construction waste on the environment, and improve the utilization efficiency of construction waste resources.

[0073] The strain modulus of construction waste refers to the ratio between the unit stress and the unit strain of construction waste when waste of different types or diameters is deformed under the action of external force. It can be used as an important parameter to describe the elastic properties of waste, reflecting the relationship between stress and strain of waste in the elastic deformation stage. In the embodiment, the strain modulus can reflect the material properties of different wastes. The above strain modulus mainly depends on factors such as waste composition, shape, density, moisture content, etc., which helps to evaluate the mechanical properties and material stability of buildings in specific application scenarios, and provide a basis for the rational utilization of construction waste and environmental protection.

[0074] The strain modulus of the above construction waste satisfies the following relationship:

[0075]

[0076] Among them, σ represents the strain modulus of construction waste, β represents the elastic modulus of construction waste, and l represents the tensile strength of construction waste.

[0077] The elastic modulus of construction waste will determine the elastic modulus of recycled coarse aggregate concrete. Due to the presence of fine cracks inside the recycled coarse aggregate, the strength and elastic modulus of construction waste are lower than those of natural crushed stone aggregate. As the replacement rate of recycled coarse aggregate increases, the elastic modulus of recycled concrete will gradually decrease, and there is a roughly linear relationship between the two.

[0078] The tensile strength of construction waste refers to the ability of construction waste materials to resist tensile damage when subjected to tensile force. It can measure the performance of waste resources under external tensile force. Recycled resources made from construction waste are prone to cracking when subjected to tensile force. Based on this, we can understand the tensile strength of different waste resources, which has practical value for evaluating the reuse potential and application performance of different waste resources.

[0079] The reuse and resource utilization of construction waste is an important development direction of the current construction industry. Understanding the various performance indicators of construction waste, including tensile strength, will help promote its rational application and resource utilization.

[0080] The average density of construction waste refers to the mass of waste per unit volume of different construction wastes. The density index can reflect the accumulation state and compactness of construction waste under specific conditions. The average density of waste is affected by many factors, including the composition, particle size, shape, moisture content and accumulation method of construction waste. In an optional embodiment, the density of lightweight construction materials such as wood, plastic and other wastes is relatively low, and the density of heavy materials including but not limited to concrete, bricks and metal steel materials is relatively high. The average density is of great significance for evaluation, treatment and utilization, and is helpful in formulating transportation, treatment and processing plans. In addition, the density will also affect the reuse value of waste, among which filling materials or roadbed materials require high-density waste to make them have better stability and bearing capacity.

[0081] In this embodiment, the average density of construction waste needs to satisfy the following relationship:

[0082]

[0083] in, represents the average density of construction waste, m represents the mass per unit volume of construction waste, and η represents the mass fraction of each unit volume.

[0084] The unit volume mass of construction waste refers to the mass of construction waste in unit volume, which is one of the important indicators for evaluating the physical properties of construction waste. Based on this, we can understand the compaction degree, porosity and arrangement of particles of construction waste, which is conducive to the subsequent resource processing and utilization management of construction waste.

[0085] The mass fraction of each unit volume refers to the ratio of the unit volume occupied by each component to the overall unit volume in a mixture or composite material of construction waste, that is, the percentage or ratio of the unit volume of each component to the overall unit volume. In the resource treatment process of construction waste, the unit volume ratio of different materials in the waste, such as concrete, bricks, wood, plastic, etc., can better understand the use nature of the overall waste based on different materials with different densities and physical properties.

[0086] The compression failure coefficient of waste can be used to describe the ability of construction waste to resist destruction during compression or crushing. Under certain compression or crushing conditions, the ratio of the pressure when the waste is destroyed to its original volume. The above coefficient can reflect the mechanical properties and material properties of different construction waste during the crushing process. On the other hand, in practical application projects such as construction waste landfill or foundation backfill, construction waste can be treated and utilized based on the waste compression failure coefficient and related physical property information to ensure the effective resource utilization of construction waste.

[0087] The size of the compression failure coefficient depends on factors such as the composition, structure, moisture content, and density of the construction waste. Different types of construction waste have different compression failure coefficients, which are closely related to the shape, size, and distribution of the particles inside them. For example, waste containing more large pieces of concrete or bricks usually has a higher compression failure coefficient and can better resist compression.

[0088] The total mass of construction waste refers to the mass record data corresponding to different wastes in the second classification results after the initial screening and treatment. Measuring and recording the mass of different wastes in construction waste will help to formulate scientific and reasonable waste management plans, including but not limited to waste classification, recycling, reuse and disposal.

[0089] The actual average diameter of construction waste refers to the average diameter size corresponding to different wastes in the second classification results. The diameter index can be used to describe the particle characteristics of different wastes. It is obtained by measuring the diameter of wastes in different waste samples. The actual average diameter of construction waste has a great impact on the reuse and treatment of construction waste. A smaller actual average diameter means that the waste particles are finer and can be suitable for certain specific reuse scenarios, such as making recycled aggregates, filling materials, etc. A larger actual average diameter limits the reuse of waste and requires multiple processing and crushing to meet specific requirements.

[0090] The target evaluation diameter of construction waste refers to the particle diameter size of waste that is expected or required in a specific application scenario or reuse process. In this embodiment, it can be determined based on factors such as construction project requirements, equipment performance, and waste properties, which helps to guide and manage the treatment and reuse process of construction waste. In an optional embodiment, when preparing recycled aggregate or filling material, a specific target evaluation diameter needs to be set to ensure that the quality and performance of the final product meet the requirements. By adjusting the processing processes such as crushing and screening, the particle diameter of the waste can be controlled within the target evaluation diameter range, thereby ensuring that the quality and performance of the final waste resources meet the actual application requirements.

[0091] Furthermore, in the present embodiment, the method for constructing the crushing pressure prediction model is only an optional condition of the present invention. In one or some other embodiments, the crushing prediction model can be reasonably adjusted according to the building attributes and the specific conditions of the waste. The crushing pressure prediction model can be adjusted according to the types, components and properties of waste generated by different construction projects. This can ensure that the model more accurately reflects the characteristics of actual waste, thereby improving the accuracy of the prediction results and making it have a wider range of applicability.

[0092] Then, the above crushing pressure prediction model is used to analyze the compressive strength corresponding to the second classification result, and the crushing force corresponding to the second classification result is matched based on the compressive strength. The specific implementation content is as follows:

[0093] According to the collected second classification result information and the corresponding construction waste sample data, the compressive strength test is carried out on construction waste samples of different types and diameters.

[0094] In order to more effectively treat construction waste, in the embodiment, the data of waste of different types and diameters are input into the crushing pressure prediction model, which integrates multiple key parameters of the waste, such as volume, mass, density, compression failure coefficient, diameter and compressive strength, and predicts the optimal crushing pressure or breaking force required for each type of waste through an accurate algorithm. The prediction results based on the model determine the most suitable crushing force for construction waste of different types and diameters in the second classification results, which not only ensures the efficient crushing of waste, but also avoids energy waste caused by excessive crushing, thereby realizing the optimization of the construction waste treatment process and the rational use of resources. The above construction waste treatment process can not only better manage and dispose of construction waste of different types, attributes and sizes, but also make positive contributions to promoting circular economy and sustainable development.

[0095] In actual operation, the crushing effect of different construction waste will be continuously monitored, and the crushing force will be reasonably adjusted and optimized according to the feedback results. If the relevant construction waste fails to achieve the expected crushing degree or is over-crushed, the structural parameters of the crushing pressure prediction model can be flexibly adjusted, and the physical properties of the construction waste can be re-evaluated. The above dynamic adjustment process can obtain more scientific crushing force parameters to ensure that the construction waste is treated with the best resource treatment effect, thereby achieving efficient waste crushing, while avoiding unnecessary energy consumption and waste, so as to promote efficient resource utilization and sustainable environmental development.

[0096] In this embodiment, the crushing pressure prediction model is used to analyze the different compressive strengths corresponding to the second classification results, and the corresponding waste crushing force is matched based on the compressive strength output by the model, which helps to improve the efficiency and effectiveness of waste treatment, while reducing the energy consumption and economic cost of construction waste resource treatment. In addition, it can also provide more valuable recycled materials for the reuse of construction waste, promote the development of the circular economy and the sustainable use of resources.

[0097] Furthermore, in the present embodiment, the method for obtaining the crushing strength of different construction wastes is only an optional condition of the present invention. In one or some other embodiments, the method for obtaining the crushing strength can be optimized and upgraded according to the model structure and resource utilization requirements. The method for obtaining the resource crushing strength can be optimized according to the construction resource utilization requirements. It can not only improve the morning processing efficiency of waste resources and reduce the economic cost of recycling, but also promote the efficient utilization of construction waste resources, enhance the adaptability and generalization ability of the model, and make the resource processing method of construction waste have stronger vitality and application prospects.

[0098] S4. Based on the above crushing intensity, the second classification result is processed, and a waste purification device is introduced to obtain the target construction waste resources. The specific implementation steps and contents are as follows:

[0099] In this embodiment, the second classification result is first processed based on the above-mentioned crushing strength, and the construction waste crushing equipment is introduced. The second classification result is processed in combination with the crushing strength of different construction wastes and the construction waste crushing equipment. The specific implementation content is as follows:

[0100] In this embodiment, crushing equipment suitable for processing construction waste is introduced. The above equipment mainly refers to crushers and grinders, etc. According to the characteristics of construction waste, matching crushing strength and processing requirements, a suitable equipment combination is selected, and it is ensured that the waste crushing equipment is in good working condition. According to the waste properties and crushing strength requirements, the key parameters of the crushing equipment are adjusted and set.

[0101] Then, according to the second classification result, that is, the classification result of waste of different types and different diameters, resource processing is performed. In an optional embodiment, according to the crushing force determined in step S3 and the characteristic attributes of different types of buildings, the operating parameters of the waste crushing equipment are adjusted, including but not limited to the rotation speed, feed speed and crushing force, so as to ensure that different types of waste can be processed according to the expected crushing degree, and finally the initial construction waste resources corresponding to different types and different particle sizes can be obtained, see Figure 4 , where A1 and A2 represent the construction waste obtained after the second classification procedure, S represents the crushing process of the construction waste, and IR1 and IR2 represent the first initial construction waste resource and the second initial construction waste resource, respectively.

[0102] Furthermore, during the resource processing of construction waste, the crushing conditions, degree of crushing and particle size distribution of different construction wastes will be continuously monitored to ensure that the crushing results can achieve the expected results, and the crushing force and equipment parameters will be adjusted as necessary according to the actual situation. If it is found that the construction waste is not fully crushed, the crushing force can be appropriately increased or the equipment parameters can be adjusted; if it is found that the construction waste is over-crushed, the crushing force should be appropriately reduced or the equipment parameters should be adjusted. After the waste crushing process is completed, the quality of the initial construction waste resources obtained will be evaluated, including but not limited to checking the particle size distribution, uniformity, impurity content and other indicators of different construction wastes to ensure that the initial resource processing results meet the reuse standards or the actual requirements of further processing.

[0103] In this embodiment, the second classification result is efficiently and accurately processed by combining the crushing force and the construction waste crushing equipment, which not only improves the work efficiency and output quality of resource processing, but also provides high-quality initial construction waste resources for subsequent reuse or further processing, which helps to promote the resource utilization and sustainable development of construction waste.

[0104] Furthermore, in this embodiment, the second classification result is subjected to waste crushing treatment according to the construction waste crushing equipment and crushing strength, and finally initial construction waste resources of different particle sizes are obtained. This is only an optional condition of this embodiment. In one or some other embodiments, the specific implementation method of resource recovery treatment can be adjusted according to the waste resource recovery conditions and reuse goals, which can not only improve the resource recovery treatment effect and utilization rate, but also promote technological innovation, reduce costs and energy consumption, so that the construction waste resource recovery treatment method is more in line with actual needs and real development trends.

[0105] Then, the initial construction waste resources are purified by a waste purification device, which includes a magnetic separator and a wind separator. In the embodiment, the magnetic separator and the wind separator are used to remove dust and iron-containing materials in the initial construction waste resources, and finally the target construction waste resources are obtained.

[0106] In order to further improve the quality and actual utilization value of construction waste resources, a waste purification device is introduced in the embodiment to purify the initial construction waste resources. The waste purification device mainly includes a magnetic separator and a wind separator. The above two devices can effectively remove dust and iron-containing substances in the initial construction waste resources, ensuring that the target construction waste resources finally obtained meet the waste resource recycling standards to the greatest extent.

[0107] First, the above-mentioned magnetic separator is used to perform magnetic separation on the initial construction waste resources. The magnetic separator can effectively remove the iron materials in the initial waste resources by using the magnetic field, including but not limited to directly separating materials such as iron nails and iron wires. This process not only removes impurities in the initial construction waste resources, but also helps to quickly recycle and reuse iron-related materials, reducing the waste of construction resources.

[0108] After magnetic separation, the waste is transported to the wind separator for further processing. The wind separator uses aerodynamic principles to adjust the wind speed and direction to blow away dust and light materials in the initial waste resources, such as paper scraps, plastic fragments and dust, which helps to remove dust and light impurities in the waste and improve the purity of the target construction waste resources. At the same time, the waste can also be tested for quality, including but not limited to wear resistance, durability and stability, to ensure that the target construction waste resources meet the relevant standards for reuse of resources.

[0109] The target construction waste resources after purification are carefully stored for subsequent use. These carefully processed resource materials, such as recycled aggregates, can be widely used in the production of recycled concrete, roadbed materials and other fields, thereby realizing the effective resource utilization of construction waste. On the other hand, in the process of resource treatment, dust and iron-containing impurities have been successfully removed, and the reuse value of the target construction waste resources has been significantly improved, which not only helps to promote the vigorous development of the circular economy, but also lays a solid foundation for the long-term sustainable use of resources. The resource treatment of waste based on the resource treatment method of construction waste can not only reduce resource waste, but also make positive contributions to environmental protection and economic development.

[0110] Furthermore, the specific implementation steps and related contents of the method for resource recovery of construction waste in this embodiment are merely an optional condition of this embodiment. In one or some other embodiments, the method for resource recovery of waste can be adjusted according to the nature of the waste and the resource target requirements, which helps to improve the treatment effect and efficiency of waste resources, reduce economic costs and energy consumption, promote innovation in resource recovery technology and enhance sustainability, thereby opening up a broader path for the resource recovery of construction waste and promoting the development of a circular economy and the long-term sustainable use of resources.

[0111] See also Figure 5 In an optional embodiment, in order to efficiently execute the resource treatment method for construction waste provided by the present invention, the present invention also provides a resource treatment system for construction waste, the system comprising a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, the processor is configured to call the program instructions, and execute the specific steps of the relevant embodiments of the resource treatment method for construction waste provided by the present invention. The resource treatment system for construction waste of the present invention has a complete structure, objective stability, and can efficiently execute the resource treatment method for construction waste of the present invention, thereby improving the overall applicability and practical application ability of the present invention.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A method for recycling construction waste, characterized in that: The steps include: Randomly selecting an abandoned building area, classifying waste in the abandoned building area, and obtaining a first classification result of the abandoned building area; Screening the first classification results and obtaining second classification results of abandoned building areas; Establishing a crushing pressure prediction model according to the abandoned building area and the second classification result, and analyzing the crushing force corresponding to the second classification result by using the crushing pressure prediction model; Processing the second classification result based on the crushing intensity, and introducing a waste purification device to obtain target construction waste resources; The step of classifying the waste in the abandoned building area and obtaining a first classification result of the abandoned building area includes: Classifying the construction waste based on the type of the construction waste and obtaining a first classification result of the abandoned construction area; The step of screening the first classification result and obtaining the second classification result of the abandoned building area includes: Installation of construction waste sorting equipment; Using the construction waste sorting equipment to screen the first classification result, and obtain a screening result corresponding to the first classification result; Combining the screening results to obtain a second classification result of the abandoned building area; The crushing pressure prediction model satisfies the following relationship: ， in, Indicates the compressive strength of recycled construction waste. represents the total volume of construction waste, represents the strain modulus of construction waste, represents the average density of construction waste, represents the compression failure coefficient of construction waste, represents the total mass of construction waste, represents the actual average diameter of construction waste, represents the target evaluation diameter of construction waste; The compression failure coefficient of the construction waste needs to satisfy the following relationship: ， in, represents the compression failure coefficient of construction waste, It represents the radial normal stress index of construction waste. represents the stress crushing energy, represents the average cross-sectional area of ​​construction waste, represents the tangential normal stress received by construction waste; The strain modulus of the construction waste satisfies the following relationship: ， in, represents the strain modulus of construction waste, represents the elastic modulus of construction waste, Indicates the tensile strength of construction waste; The average density of the construction waste satisfies the following relationship: ， in, represents the average density of construction waste, It represents the mass per unit volume of construction waste. Indicates the mass fraction per unit volume.

2. The method for recycling construction waste according to claim 1, characterized in that: The crushing force corresponding to the second classification result analyzed by the crushing pressure prediction model includes: Analyzing the compressive strength corresponding to the second classification result by using the crushing pressure prediction model; The crushing strength corresponding to the second classification result is matched according to the compressive strength.

3. The method for recycling construction waste according to claim 1, characterized in that: The processing of the second classification result based on the crushing strength includes: Introducing construction waste crushing equipment; Processing the second classification result based on the crushing strength and the construction waste crushing equipment; The processing of the second classification result based on the crushing strength further includes: The second classification result is subjected to waste crushing processing according to the construction waste crushing equipment and the crushing strength to obtain initial construction waste resources with different particle sizes.

4. The method for recycling construction waste according to claim 1, characterized in that: The method of introducing a waste purification device to obtain target construction waste resources includes: The waste purification device is used to purify the initial construction waste resources, and the waste purification device includes a magnetic separator and a wind separator.

5. The method for recycling construction waste according to claim 4, characterized in that: The method of introducing a waste purification device to obtain target construction waste resources includes: The dust and iron materials of the initial construction waste resources are removed by the magnetic separator and the wind separator to obtain the target construction waste resources.

6. A construction waste resource treatment system, characterized in that: The system includes a processor, an input device, an output device and a memory, wherein the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the resource recovery method for construction waste as described in any one of claims 1 to 5.

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