Concrete environmental impact assessment method based on life cycle approach

Abstract

The present invention relates to the technical field of concrete construction, and in particular to a concrete environmental impact assessment method based on a life cycle approach. The method comprises the steps of: determining a concrete type on the basis of a construction environment and design requirements of a project; analyzing each stage of concrete engineering in a functional unit, and determining an evaluation range thereof; establishing a region-specific concrete life cycle database; performing inventory analysis on an evaluation range of a concrete life cycle; after the inventory analysis, using component inventories of full-life-cycle concrete to establish indicators on the basis of environmental policies of a construction region, so as to perform an environmental impact assessment; and finally, analyzing and evaluating various energy indicators of the concrete, and guiding the establishment of a subsequent project construction plan. In the assessment method, a full-life-cycle assessment is performed on concrete, the degrees of environmental impact caused by different construction processes in concrete engineering are objectively and holistically assessed, and evaluation and improvement schemes are proposed for the concrete construction, thereby reducing the energy and material consumption in concrete engineering construction.

Description

A concrete environmental impact assessment method based on life cycle theory Technical Field

[0001] The present invention belongs to the technical field of concrete construction, and in particular relates to a concrete environmental impact assessment method based on life cycle theory. Background Art

[0002] With the rapid development of industrialization and urbanization, large-scale construction and the vigorous development of civil engineering have become an inevitable trend in the era. With the increasing number of large-scale concrete projects being put into construction and development, the difficulty and working environment are becoming increasingly challenging. Various high-performance concretes and specialized concretes adapted to the working environment have emerged. However, due to the high demand for concrete and the complex construction processes, the energy and material consumption in concrete construction is inevitably immeasurable. In order to actively respond to the strategic deployment of the "dual carbon" strategy, how to objectively and holistically evaluate the environmental impact of different concrete construction processes has become a critical issue.

[0003] After nearly 50 years of development, life cycle assessment (LCA) has been adopted by the ISO 14000 environmental management standards, becoming a key support tool for international environmental management and product design. It focuses on the environmental impact of a product's entire life cycle, from raw material acquisition and processing, product processing and production, distribution and transportation, use and maintenance, to recycling and final disposal of waste products. It then develops appropriate measures and methods to reduce these impacts. It represents a new environmental management model aligned with sustainable development strategies. Currently, there is no research integrating the LCA with concrete engineering to assess its environmental impact. The main reasons are as follows: First, existing concrete engineering evaluation indicators and methods are largely developed voluntarily by institutions and enterprises, often focusing on specific areas or technologies, hindering their universal application. Second, there is a lack of a comprehensive, multi-dimensional database for LCA data. Concrete construction techniques and requirements vary widely across regions, making it difficult to apply a single metric. In addition, with the development of scientific research level and construction technology of concrete materials, many green new concrete and energy-saving and emission-reduction concrete construction processes are also in the development stage, and the evaluation of such "dual carbon" products also needs to be systematically considered.

[0004] Summary of the Invention

[0005] In response to the above problems, the purpose of the present invention is to provide a concrete environmental impact assessment method based on life cycle theory. By establishing a local energy consumption database, it is possible to conduct a full life cycle evaluation of specific and non-specific concrete in project construction, objectively and holistically evaluate the impact of different concrete engineering construction processes on the environment, and propose assessment and improvement plans for concrete construction, so as to reduce the energy and material consumption of concrete engineering construction during the project planning period.

[0006] The technical solution of the present invention is: a method for evaluating the environmental impact of concrete based on life cycle theory, characterized by comprising the following steps:

[0007] S1: Determine the basic information of the concrete to be evaluated according to the design requirements of the project;

[0008] S2: Select 1kg, 1t or 1m 3 The scope of the entire life cycle process of the functional unit's concrete is defined and the assessment scope is determined, specifically the entire process of the concrete project from raw materials to concrete product disposal and reuse;

[0009] S3: Establishing the concrete life cycle database based on the assessment scope determined in step S2. The specific process is as follows: inputting data based on the basic information determined in step S1 and the assessment scope determined in step S2 as the basic framework for database data input. The data in the database are obtained by combining actual project engineering surveys and searching the "China Life Cycle Basic Database";

[0010] S4: Inventory analysis: Based on the database established in step S3, quantitative analysis of resources, energy consumption and environmental emissions during the entire life cycle of the concrete project is conducted according to the concrete assessment scope determined in step S2. The data is directly extracted from the database.

[0011] S5: The energy consumption list obtained by the quantitative analysis of energy consumption is used to formulate an evaluation plan through the CML method, and its environmental impact is evaluated through characterization and standardization to obtain various energy indicators of concrete in its life cycle;

[0012] S6: Analyze and evaluate various energy indicators of concrete throughout its life cycle to complete the concrete environmental impact assessment. The basic information of concrete determined in step S1 includes concrete mix ratio, raw material usage, concrete test data, and concrete utilization path data.

[0013] The concrete work P in step S2 a It is specifically divided into four stages: P1 raw material stage, P2 concrete preparation stage, P3 concrete construction, and P4 concrete waste and recycling.

[0014] In step S3, a concrete life cycle database is established, and the specific steps are as follows:

[0015] S31: P a The various production activity stages are defined as P a -Q n Specifically: the P1 raw material stage includes P1-Q1 cement, P1-Q2 silica fume, P1-Q3 mineral powder, P1-Q4 fly ash, P1-Q5 fine aggregate (particle size <4.75mm), P1-Q6 coarse aggregate (particle size ≥4.75mm), P1-Q7 water reducer; the P2 concrete test preparation stage includes P2-Q1 test, P2-Q2 preparation, P2-Q3 transportation; the P3 concrete construction stage includes P3-Q1 construction, P3-Q2 operation, P3-Q3 maintenance; the P4 concrete waste reuse stage includes P4-Q1 waste and P4-Q2 reuse;

[0016] S32: Each production activity P a -Q n The specific operation steps are defined as Specific definition such as: P1-Q1 cement contains P1-Q2 fly ash contains Other stages a -Q n correspond Similarly, the database reference frame is refined in this way, and the life cycle assessment scope model is the database search framework;

[0017] S33: Corresponding energy consumption set The internal element composition is recorded as e i , for the energy consumption data of each step, statistics, cloud computing or AI training, integrated into the database, Q n Energy consumption items are expressed in E i Form output, E i is the i-th environmental input or output of the concrete life cycle system, E i It is expressed as the input or output data of the i-th environment of the concrete life cycle system, which can be directly used for subsequent inventory analysis and also used to supplement database data;

[0018] S34: After the database is established, it can simulate the establishment of a life cycle assessment scope framework model, and also extract energy consumption data information. Later, the database can be updated, trained, upgraded and maintained through actual engineering and intelligent means.

[0019] In the inventory analysis of step S4, the processes of each stage of the concrete engineering life cycle P1, P2, P3, and P4 are determined respectively, and the energy consumption E of each stage is extracted from the database in step S3. i , to determine the energy consumption emission inventory of functional unit concrete engineering during its life cycle.

[0020] In step S5, an evaluation plan is formulated using the CML method. Standardization is performed in the environmental impact assessment to evaluate the environmental impact indicators of the entire life cycle. The energy consumption in the inventory is standardized to determine the environmental impact assessment status within the life cycle. Continuous machine learning is then used to determine the weight factor value of each environmental impact type within the life cycle of concrete. Finally, the weighted summation is performed to obtain the total impact of concrete within the entire life cycle. The specific process is as follows:

[0021] Energy consumption during the life cycle E i The characterization formula is:

[0022] Where, EI j is the environmental impact index of the jth environmental impact type; E i is the i-th input or output in the life cycle; CF ij The equivalent coefficient of the i-th input or output on the j-th environmental impact type, i.e., the characterization factor of different impact types, needs to be investigated and determined based on the project environment area and actual construction;

[0023] The annual person-equivalent number of environmental impacts is selected as the standardization benchmark, and the standardization result is expressed as the person-equivalent environmental impact per unit quantity. The standardization formula for determining the environmental impact type is:

[0024] Where NEI j is the normalized result of the j-th environmental impact type index; NR j is the standardized benchmark for the jth environmental impact type;

[0025] The weighted calculation formula for the environmental impact type index and the life cycle total environmental impact index is: WNEI j =NEI j ×WF j (3)

[0026] Where WNEI j is the weighted result of the j-th environmental impact type index; WF j is the weight factor of the jth environmental impact type; TWNEI is the total life cycle environmental impact index.

[0027] In step S6, various energy indicators of concrete throughout its life cycle are analyzed and evaluated to complete the environmental impact assessment of concrete. The specific process is as follows: if the concrete project is in the planning stage, different construction plans for the construction project are compared through life cycle assessment, and a construction plan that saves energy and reduces emissions is selected; if the concrete project is completed or under construction, post-project prevention, control, and maintenance measures are implemented based on the life cycle assessment analysis.

[0028] In the present invention, an evaluation scheme is formulated by the CML method. The CML method is an existing technology and divides environmental impact assessment types into three categories: energy, pollution and loss. Its main environmental impact indicators are: abiotic depletion potential (ADP), global warming potential (GWP), ozone depletion potential (ODP), human health toxicity potential (HTP), terrestrial ecotoxicity potential (TETP), freshwater aquatic ecotoxicity potential (FAETP), marine aquatic ecotoxicity potential (MAETP), photochemical oxidation potential (POCP), acidification potential (AP), eutrophication potential (EP), etc., which is a very comprehensive evaluation method.

[0029] The technical effects of the present invention are: 1. The present invention establishes a regional exclusive concrete life cycle database, which develops and updates in real time with the update of concrete construction technology, materials, scientific and technological development, and local and government policies. It can formulate plans dynamically according to the construction projects, work locations, and formulate more environmentally friendly and economical construction plans; 2. The present invention establishes a systematic and intelligent life cycle evaluation system model, which can directly select and add more detailed steps in concrete construction in the four major stages of P1, P2, P3, and P4 according to the needs of the engineering project, and directly generate the full life cycle framework of the engineering project. It can more easily and simply formulate the life cycle of the project, which is conducive to the monitoring of the actual project life cycle process, the formulation and optimization of energy consumption and environmental protection plans for the proposed construction projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a flow chart of a method for evaluating the environmental impact of concrete based on life cycle theory according to an embodiment of the present invention.

[0031] FIG2 is a schematic diagram of a concrete construction assessment scope of a concrete environmental impact assessment method based on life cycle theory according to an embodiment of the present invention.

[0032] FIG3 is a schematic diagram of a database establishment method for concrete environmental impact assessment based on life cycle theory according to an embodiment of the present invention.

[0033] FIG4 is a schematic diagram of an environmental impact assessment of mineral powder concrete based on the life cycle theory according to an embodiment of the present invention.

[0034] FIG5 shows the steps for characterizing and standardizing the calculation of various environmental impact factors of mineral powder concrete based on the life cycle theory according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] Example 1

[0036] As shown in FIG1 , a concrete environmental impact assessment method based on life cycle theory is characterized by comprising the following steps:

[0037] S1: Determine the basic information of the concrete to be evaluated according to the design requirements of the project;

[0038] S2: Select 1kg, 1t or 1m 3 The scope of the entire life cycle process of the functional unit's concrete is defined and the assessment scope is determined, specifically the entire process of the concrete project from raw materials to concrete product disposal and reuse;

[0039] S3: Establishing the concrete life cycle database based on the assessment scope determined in step S2. The specific process is as follows: inputting data based on the basic information determined in step S1 and the assessment scope determined in step S2 as the basic framework for database data input. The data in the database are obtained by combining actual project engineering surveys and searching the "China Life Cycle Basic Database";

[0040] S4: Inventory analysis: Based on the database established in step S3, quantitative analysis of resources, energy consumption and environmental emissions during the entire life cycle of the concrete project is conducted according to the concrete assessment scope determined in step S2. The data is directly extracted from the database.

[0041] S5: The energy consumption list obtained by the quantitative analysis of energy consumption is used to formulate an evaluation plan through the CML method, and its environmental impact is evaluated through characterization and standardization to obtain various energy indicators of concrete in its life cycle;

[0042] S6: Analyze and evaluate various energy indicators of concrete throughout its life cycle to complete the concrete environmental impact assessment. The basic information of concrete determined in step S1 includes concrete mix ratio, raw material usage, concrete test data, and concrete utilization path data.

[0043] The concrete work P in step S2 a It is specifically divided into four stages: P1 raw material stage, P2 concrete preparation stage, P3 concrete construction, and P4 concrete waste and recycling.

[0044] In step S3, a concrete life cycle database is established, and the specific steps are as follows:

[0045] S31: P a The various production activity stages are defined as P a -Q n Specifically: the P1 raw material stage includes P1-Q1 cement, P1-Q2 silica fume, P1-Q3 mineral powder, P1-Q4 fly ash, P1-Q5 fine aggregate (particle size <4.75mm), P1-Q6 coarse aggregate (particle size ≥4.75mm), P1-Q7 water reducer; the P2 concrete test preparation stage includes P2-Q1 test, P2-Q2 preparation, P2-Q3 transportation; the P3 concrete construction stage includes P3-Q1 construction, P3-Q2 operation, P3-Q3 maintenance; the P4 concrete waste reuse stage includes P4-Q1 waste and P4-Q2 reuse;

[0046] S32: Each production activity P a -Q n The specific operation steps are defined as Specific definition such as: P1-Q1 cement contains Cement preparation, Cement transportation; P1-Q2 fly ash contains Other stages a -Q n correspond Similarly, the database reference frame is refined in this way, and the life cycle assessment scope model is the database search framework;

[0047] S33: Corresponding energy consumption set The internal element composition is recorded as e i , for the energy consumption data of each step, statistics, cloud computing or AI training, integrated into the database, Q n Energy consumption items are expressed in E i Form output, E iis the i-th environmental input or output of the concrete life cycle system, E i It is expressed as the input or output data of the i-th environment of the concrete life cycle system, which can be directly used for subsequent inventory analysis and also used to supplement database data;

[0048] S34: After the database is established, it can simulate the establishment of a life cycle assessment scope framework model, and also extract energy consumption data information. Later, the database can be updated, trained, upgraded and maintained through actual engineering and intelligent means.

[0049] In the inventory analysis of step S4, the processes of each stage of the concrete engineering life cycle P1, P2, P3, and P4 are determined respectively, and the energy consumption E of each stage is extracted from the database in step S3. i , to determine the energy consumption emission inventory of functional unit concrete engineering during its life cycle.

[0050] In step S5, an evaluation plan is formulated using the CML method. Standardization is performed in the environmental impact assessment to evaluate the environmental impact indicators of the entire life cycle. The energy consumption in the inventory is standardized to determine the environmental impact assessment status within the life cycle. Continuous machine learning is then used to determine the weight factor value of each environmental impact type within the life cycle of concrete. Finally, the weighted summation is performed to obtain the total impact of concrete within the entire life cycle. The specific process is as follows:

[0051] Energy consumption during the life cycle E i The characterization formula is:

[0052] Where, EI j is the environmental impact index of the jth environmental impact type; E i is the i-th input or output in the life cycle; CF ij The equivalent coefficient of the i-th input or output on the j-th environmental impact type, i.e., the characterization factor of different impact types, needs to be investigated and determined based on the project environment area and actual construction;

[0053] The annual person-equivalent number of environmental impacts is selected as the standardization benchmark, and the standardization result is expressed as the person-equivalent environmental impact per unit quantity. The standardization formula for determining the environmental impact type is:

[0054] Where NEI j is the normalized result of the j-th environmental impact type index; NR j is the standardized benchmark for the jth environmental impact type;

[0055] The weighted calculation formula for the environmental impact type index and the life cycle total environmental impact index is: WNEIj =NEI j ×WF j (3)

[0056] Where WNEI j is the weighted result of the j-th environmental impact type index; WF j is the weight factor of the jth environmental impact type; TWNEI is the total life cycle environmental impact index.

[0057] In step S6, various energy indicators of concrete throughout its life cycle are analyzed and evaluated to complete the environmental impact assessment of concrete. The specific process is as follows: if the concrete project is in the planning stage, different construction plans for the construction project are compared through life cycle assessment, and a construction plan that saves energy and reduces emissions is selected; if the concrete project is completed or under construction, post-project prevention, control, and maintenance measures are implemented based on the life cycle assessment analysis.

[0058] Example 2

[0059] Using the concrete environmental impact assessment method based on the life cycle theory of the present invention described in Example 1, this example conducts an environmental impact assessment based on the full life cycle theory on the construction of concrete made of solid waste recycled materials with a lifespan of 50 years in a certain urban area in Shaanxi Province.

[0060] S1: According to the project construction requirements, the construction environment of this project is Class IIa, an open-air environment in neither severe nor cold regions; Determine the concrete type: Based on the green recycling requirements, this embodiment uses recycled granulated blast furnace slag powder recycled concrete;

[0061] S2: Select the concrete of the functional unit for raw material analysis and determine the scope of concrete construction assessment. The four major stages of the assessment scope are P1 concrete raw materials, P2 concrete preparation, P3 concrete construction and P4 abolition of the entire life cycle, and list the major stages Q n , and based on the actual investigation, the energy consumption type is obtained. The specific evaluation scope flow chart is shown in Figure 4;

[0062] S3: Establish the Shaanxi Provincial Local Database. As can be seen from Figure 4, the production activities in the P1 stage are composed of Q1 cement, Q2 silica fume, Q3 mineral powder, Q4 fine aggregate, Q5 coarse aggregate, and Q6 water reducer. For example, the Q1 production activity consists of two steps, namely Composition, similarly we can conclude that all The corresponding energy consumption Conduct actual investigation, calculate and integrate to get the overall energy consumption E i, see Table 1, Table 2, Table 3, Table 4. This energy consumption list is the basic data in the life cycle assessment template library of this type in the database, and can be directly used for the inventory analysis of this project;

[0063] Table 1 Raw materials of slag powder concrete

[0064] Table 2 Preparation of slag powder concrete

[0065] Table 3 Slag powder concrete construction

[0066] Table 4 Waste and reuse of slag powder concrete

[0067] S4: Perform inventory analysis and extract basic input data from the database established in step S3; the steps of establishing the assessment scope and selecting data from the database are the same as those of establishing the database, and establish the life cycle environmental assessment inventory (i.e., Table 1, Table 2, Table 3, Table 4);

[0068] S5: Environmental impact assessment. After the list analysis in step S4, the list of each component of the whole life cycle of concrete is formulated through the environmental policy indicators of the construction area and the local policy requirements. The main environmental impact factors of this concrete project are: abiotic depletion potential (ADP), global warming potential (GWP), ozone depletion potential (ODP), human health toxicity potential (HTP), photochemical oxidation potential (POCP), acidification potential (AP), eutrophication potential (EP). The specific characterization and standardization of each influencing factor are shown in Figure 5. ij It is the equivalent coefficient of each energy consumption on the jth environmental impact type, that is, the characterization factor, which is calculated based on the project environmental area, actual construction and local carbon emission standards: In this project, non-biological consumption is expressed in Sb equivalents, global warming potential (carbon emission) is expressed in CO2 equivalents, ozone depletion potential is expressed in CFC-11 equivalents, toxic potential is expressed in 1,4-DCB equivalents, photochemical oxidation potential is expressed in C2H4 equivalents, acidification potential is expressed in SO2 equivalents, and eutrophication potential is expressed in PO4 equivalents. 3-The equivalent expression, the potential characterization index of this project is shown in Table 5;

[0069] Table 5 Characterization of the contribution of each index in mineral powder concrete

[0070] Each impact characterization index is weighted according to environmental and regional policy standardization. The standardization benchmark and weight factors of this project refer to the international LCA standard "Normalization figures for environmental life cycle assessment" (see Table 6). You can also conduct your own research and calculations.

[0071] Table 6 Standardization benchmarks and weighting factors

[0072] The calculated results of standardization and weight distribution of each environmental impact type are shown in Table 7.

[0073] Table 7 Normalization and weight distribution results

[0074] S6: Count the energy consumption of concrete throughout its life cycle and evaluate the life cycle of slag powder concrete construction in a certain urban area in Shaanxi Province.

[0075] The characteristic analysis can reveal the proportion of each stage in each impact type, see Table 8.

[0076] Table 8 Proportion of each stage in each impact type of concrete life cycle

[0077] At the same time, after standardization and weight distribution, the concrete life cycle can be analyzed horizontally to obtain the proportion of total environmental impact, as shown in Table 9. It can also be refined to the proportion of each impact type in each stage, as shown in Table 10.

[0078] Table 9 Percentage of total environmental impact

[0079] Table 10 Proportion of environmental types in each stage of concrete engineering life cycle

[0080] This concrete project is in the planning phase. Table 8 shows that the construction phase accounts for the largest share of non-biological energy consumption, or petroleum, during the entire life cycle of the mineral powder concrete project, at 91.3%. Furthermore, the construction phase accounts for the largest share for nearly every impact indicator, indicating that the construction phase, including construction, operation, and maintenance, is the most important, energy-intensive, and environmentally impactful phase of the concrete project's life cycle. Table 9 shows that, within the entire mineral powder concrete project life cycle planning, its non-biological energy consumption accounts for only 1.61% and its global warming potential accounts for only 1.06%, indicating that this project is a low-carbon, energy-saving, and environmentally friendly project with low carbon emissions and a low proportion of non-renewable resources. In contrast, its light pollution and atmospheric acidification impacts require monitoring and control in conjunction with the construction organization plan. A combination of Tables 9 and 10 shows that, in this concrete project plan, the photochemical impact during the construction phase accounts for the largest share, and the atmospheric acidification impact during the preparation phase accounts for the largest share. Therefore, when the project officially commences, relevant departments should be reminded to implement preventive measures and rectification measures for concrete production activities during this phase. The construction project can be evaluated based on Tables 8, 9, and 10 above, thereby providing planning and guidance for the concrete green and environmentally friendly construction system.

Claims

1. A method for evaluating the environmental impact of concrete based on the life cycle theory, characterized in that, It includes the following steps: S1: Determine the basic information of the concrete to be evaluated according to the design requirements of the engineering project; S2: Select 1 kg, 1 t or 1 m 3 Define the scope of the entire life cycle process for 1 functional unit of concrete to determine the evaluation scope, specifically the entire process scope from the raw materials to the abandonment and reuse of the concrete products for this concrete project; S3: Establish the concrete life cycle database based on the evaluation scope determined in step S2. The specific process is as follows: Use the basic information determined in step S1 and the evaluation scope determined in step S2 as the basic framework for data input into the database, and the data in the database is obtained by combining the actual investigation of the project engineering and the retrieval of the "China Life Cycle Basic Database"; S4: Inventory analysis. Based on the database established in step S3, quantify and analyze the resources, energy consumption, and environmental emissions in the entire life cycle stage of the concrete project according to the concrete evaluation scope determined in step S2, and the data is directly extracted from the database; S5: Develop an evaluation plan for the energy consumption inventory obtained from the quantitative analysis of energy consumption through the CML method, and evaluate its environmental impact through characterization and normalization processes to obtain various energy indicators of the concrete in the life cycle; S6: Analyze and evaluate various energy indicators of the concrete in the entire life cycle to complete the environmental impact assessment of the concrete.

2. The method for evaluating the environmental impact of concrete based on the life cycle theory according to claim 1, characterized in that: The basic information of the concrete determined in step S1 includes the concrete mix ratio, raw material dosage, concrete test data, and concrete utilization path data.

3. The method for evaluating the environmental impact of concrete based on the life cycle theory according to claim 1, characterized in that: The concrete project P described in step S2 a Specifically, it is divided into four stages, namely P1 raw material stage, P2 concrete preparation stage, P3 concrete construction, and P4 concrete waste and recycling and reuse.

4. The method for evaluating the environmental impact of concrete based on the life cycle theory according to claim 3, characterized in that: The specific steps for establishing the concrete life cycle database in step S3 are as follows: S31: Define the production activity stages in P a as P a -Q n , specifically: in the P1 raw material stage, it includes P1-Q1 cement, P1-Q2 silica fume, P1-Q3 blast furnace slag powder, P1-Q4 fly ash, P1-Q5 fine aggregate (particle size < 4.75mm), P1-Q6 coarse aggregate (particle size ≥ 4.75mm), P1-Q7 water reducing agent; in the P2 concrete test preparation stage, it includes P2-Q1 test, P2-Q2 preparation, P2-Q3 transportation; in the P3 concrete construction stage, it includes P3-Q1 construction, P3-Q2 operation, P3-Q3 maintenance; in the P4 concrete waste recycling stage, it includes P4-Q1 waste, P4-Q2 recycling; S32: Define the specific operation steps for each production activity P a -Q n as The specific definition is as follows: P1-Q1 cement contains Cement preparation Cement transportation; contained in P1-Q2 fly ash Other stage P a -Q n corresponding Similarly, refine the database reference framework accordingly, and the life cycle assessment scope model is the database search framework; S33: Corresponding energy consumption set The internal element composition is denoted as e i , for the energy consumption data of each corresponding step, statistical, for cloud computing or AI training, integrated and compiled into the database, and Q n The energy consumption item is E i is output in the form of E i is the i-th environmental input or output of the concrete life cycle system, and E i represents the i-th environmental input or output data of the concrete life cycle system, which can be directly used for subsequent inventory analysis and also for database data supplementation; S34: After the establishment of this database, a life cycle assessment scope framework model can be simulated and established, and at the same time, energy consumption data information can be extracted. Later, the database can be updated, trained, upgraded, and maintained through actual engineering and intelligent means.

5. The method for evaluating the environmental impact of concrete based on the life cycle theory according to claim 4, characterized in that: In the list analysis of step S4, determine the processes of the concrete project in each stage of the entire life cycle of P1, P2, P3, and P4 respectively, and extract each energy consumption E from the database in step S3 i , so as to determine the energy consumption and emission inventory of the functional unit of the concrete project in the life cycle.

6. The method for evaluating the environmental impact of concrete based on the life cycle theory according to claim 4, characterized in that: In step S5, an evaluation plan is developed through the CML method. In the environmental impact assessment, normalization is used to evaluate each environmental impact indicator in its entire life cycle, normalize each energy consumption in the inventory, determine its environmental impact assessment situation within the life cycle, then use the continuous machine learning method to determine the weight factor values of various environmental impact types within the concrete life cycle, and finally, weighted summation is used to obtain the total impact of the concrete within the entire life cycle. The specific process is as follows: Energy consumption E during the life cycle i The characterization determination formula is as follows: wherein, EI j is the environmental impact index of the jth type of environmental impact; E i is the ith input or output during the life cycle; CF ij is the equivalence coefficient of the ith input or output to the jth type of environmental impact, that is, the characterization factor of different impact types, which needs to be investigated and determined according to the project environment area and actual construction; Select the annual environmental impact person equivalent as the standardized benchmark. The standardized result is expressed as the environmental impact of person equivalent per unit quantity. The formula for determining the standardization of environmental impact types is as follows: wherein, NEI j is the standardized result of the index of the j-th type of environmental impact; NR j is the standardization benchmark of the j-th type of environmental impact; The weighted calculation of the environmental impact type index and the calculation formula for the total environmental impact index of the life cycle are: WNEI j = NEI j × WF j (3) where, WNEI j is the weighted result of the j-th type of environmental impact type index; WF j is the weight factor of the j-th type of environmental impact type; TWNEI is the total life cycle environmental impact index.

7. The concrete environmental impact assessment method based on the life cycle theory according to claim 1, wherein: In step S6, analyze and evaluate various energy indicators of the concrete in the entire life cycle to complete the environmental impact assessment of the concrete. The specific process is as follows: If the concrete project is in the planning stage, compare different construction plans of the construction project through life cycle assessment and select a construction plan that saves energy and reduces emissions; if the concrete project is in the completed or under-construction stage, carry out post-project prevention, treatment, and maintenance measures according to the life cycle assessment analysis.

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