Foam concrete carbon emission evaluation method based on full life cycle

Abstract

The invention discloses a foam concrete carbon emission evaluation method based on a full life cycle. The evaluation method comprises the following steps: calculating carbon emission of a foam concrete raw material in a production stage; calculating carbon emission in the foam concrete logistics transportation stage; calculating carbon emission in a foam concrete construction stage; calculating the carbon emission of the foam concrete demolition construction stage and the site cleaning transportation stage; calculating carbon emission in a foam concrete recycled material reutilization stage; and calculating the carbon emission in the full life cycle stage of the foam concrete. The foam concrete carbon emission evaluation method based on the full life cycle can help a designer and a decision maker to calculate carbon emission data of foam concrete in a short time, so that design optimization and decision making can be better carried out, and key carbon emission information can be provided for related personnel in a preliminary design stage; therefore, emission reduction measures can be taken earlier.

Description

Technical Field

[0001] The patent of this invention relates to the field of carbon emissions, and in particular to a carbon emission evaluation method for foam concrete based on the entire life cycle. Background Art

[0002] As the global climate change problem becomes increasingly serious, reducing greenhouse gas emissions has become a common focus of governments and companies around the world. The civil engineering industry is the main source of carbon emissions, and the calculation of carbon emissions throughout the life cycle is an important means of evaluating the environmental impact of products. Accurate carbon emission data can help engineering designers understand the environmental impact of buildings. In addition, the calculation of carbon emissions throughout the life cycle is also the key to achieving green engineering and sustainable development goals.

[0003] The construction industry contributes 37% of global carbon emissions. As the world's most used building material, cement accounts for at least 8% of global carbon emissions. Foamed concrete products require a huge amount of cement. However, in the process of development, the impact and calculation of carbon emissions have been ignored, and the pace of the national carbon market has not been followed. It is of great significance to carry out carbon emissions analysis of foamed concrete products.

[0004] In the existing technology, the current carbon emission evaluation system is mainly used for products with higher carbon emissions. The single carbon emissions in the field of foam concrete construction are relatively small, and there is a lack of a scientific carbon emission evaluation method. There are very few studies on the carbon emissions of foam concrete. Although there are a small number of carbon emission evaluation systems for the construction field on the market, due to different quantitative evaluation standards and scales, the specified standards are also different. It is difficult to have a unified measurement indicator applicable to the field of foam concrete construction. For this reason, a foam concrete carbon emission evaluation method based on the entire life cycle is proposed. Summary of the invention

[0005] Purpose of the invention: The present invention provides a foam concrete carbon emission evaluation method based on the entire life cycle, which can help designers and decision makers calculate the carbon emission data of foam concrete in a short time, so as to better optimize the design and make decisions. It can also provide key carbon emission information to relevant personnel in the preliminary design stage, so as to take emission reduction measures earlier.

[0006] Technical solution: The carbon emission evaluation method of foamed concrete based on the whole life cycle of the present invention comprises the following steps:

[0007] Step 1, obtaining the material consumption of foamed concrete and the corresponding carbon emission factor of material production, and calculating the carbon emission of the raw material production stage of foamed concrete;

[0008] Step 2, obtaining the transportation distance of foam concrete and the carbon emission factor of the corresponding transportation mode, and calculating the carbon emission of the foam concrete logistics transportation stage;

[0009] Step 3, obtaining the construction information of foam concrete and the carbon emission factor of the construction machinery shift, and calculating the carbon emission of the foam concrete construction phase;

[0010] Step 4: Obtain the foam concrete demolition information and the carbon emission factor of the demolition machinery shift, and calculate the carbon emissions of the foam concrete demolition construction and site clearance and transportation stages;

[0011] Step 5, obtaining the recycling information of foam concrete and the carbon emission factor of the reproducing machinery shift, and calculating the carbon emission of the recycled foam concrete in the reuse stage;

[0012] Step 6, based on the carbon emissions in the foam concrete raw material production stage, the logistics and transportation stage, the construction stage, the demolition and site clearance and transportation stage, and the recycling and reuse stage, the total carbon emissions of the foam concrete over its entire life cycle are accumulated.

[0013] Furthermore, in step 1, the specific steps for calculating the carbon emissions in the production stage of foamed concrete raw materials are as follows:

[0014] First, according to the material list of foam concrete, the usage information of cement, fly ash, admixtures and the corresponding carbon emission factor information are obtained;

[0015] Then calculate the carbon emissions during the raw material production stage;

[0016]

[0017] Where:

[0018] E materials - Carbon emissions during the production of raw materials for foamed concrete;

[0019] M SC,i - the amount used in the production process of the i-th raw material;

[0020] H SC,i - Carbon emission factor of raw materials of category i;

[0021] Q SC,i - The amount of electricity or fossil energy consumed by the machinery and equipment used in the preparation of the i-th raw material;

[0022] W SC,i - Carbon emission factor of electricity or fossil energy used in the preparation process of the i-th raw material;

[0023] N SC,i -Man-days required for the production of the i-th raw material;

[0024] F SC,i-The average carbon emission factor of the production labor of the ith raw material.

[0025] Furthermore, in step 2, the specific steps for calculating the carbon emissions in the logistics and transportation stage of foam concrete are as follows:

[0026] First, obtain the transportation method, transportation distance and carbon emission factor information of each material;

[0027] Then calculate the carbon emissions during the logistics and transportation stage:

[0028]

[0029] Where:

[0030] E transport -Carbon emissions from the logistics and transportation of raw materials for foamed concrete;

[0031] T WL,i - average transportation distance of the ith material;

[0032] H WL,i - Carbon emission factor per unit distance for the i-th material under this mode of transportation;

[0033] M WL,i - the transport volume of the i-th material;

[0034] S WL,i -Carbon emission factor correction coefficient during logistics transportation shall not be less than 1;

[0035] N WL,i -Man-hours required for the logistics and transportation stage of the i-th material;

[0036] F WL,i -The average carbon emission factor of the labor required in the logistics and transportation stage of the i-th material.

[0037] Furthermore, in step 3, the specific steps for calculating the carbon emissions during the construction phase of foam concrete are as follows:

[0038] First, obtain the energy consumption of mechanical equipment used in construction of various materials and the carbon emission factor information of the energy consumption of mechanical equipment;

[0039] Then calculate the carbon emissions during the construction phase:

[0040]

[0041] Where:

[0042] E construction - Carbon emissions during the construction phase of foam concrete construction;

[0043] Q JZ,i- Energy consumption of machinery and equipment used for material i;

[0044] H JZ,i - Carbon emission factor of energy consumption of mechanical equipment used for material i;

[0045] N JZ,i -Man-days required for the construction phase of the i-th material;

[0046] F JZ,i - The average carbon emission factor for labor required during the construction phase of the i-th material.

[0047] Furthermore, in step 4, the specific steps for calculating the carbon emissions during the foam concrete demolition construction and site clearance and transportation phase are as follows:

[0048] First, the energy consumption and corresponding carbon emission factors of the transportation equipment and mechanical equipment required for the demolition of foam concrete, the recycling of some garbage, and the landfill of non-recyclable garbage are obtained;

[0049] Then calculate the carbon emissions during the demolition construction and site clearance and transportation stages:

[0050] E demolition =E CS +E FY +E TM +E HY

[0051] E CS =Q CS H CS +N CS,i F CS,i

[0052] E FY =M FY,i D FY,i T FY,i +N FY,i F FY,i

[0053] E TM =Q TM H TM +N TM,i F TM,i

[0054] E HY =M HY,i D HY,i T HY,i +N HY,i F HY,i

[0055] Where:

[0056] E demolition- Carbon emissions from the foam concrete demolition construction and site clearance and transportation phases;

[0057] E CS - Carbon emissions during the demolition phase;

[0058] E FY - Carbon emissions during the waste transportation phase;

[0059] E TM - Carbon emissions from waste landfill;

[0060] E HY -Carbon emissions from the recycling and transportation phase;

[0061] Q CS , Q TM -Energy consumption of demolition construction and landfill machinery and equipment respectively;

[0062] H CS , H TM - Carbon emission factors of energy consumption of demolition construction and landfill machinery and equipment;

[0063] M FY,i 、M HY,i -The weight of waste and recyclables of the i-th material respectively;

[0064] D FY,i , D HY,i -The average transportation distance of waste and recyclables for the i-th material, respectively;

[0065] T FY,i , T HY,i - Carbon emission factors for the transport distance per unit mass of waste and recyclables of the i-th material;

[0066] N FY,i 、N TM,i 、N HY,i - Corresponds to the man-hours required for each sub-stage of demolition construction and site clearance and transportation;

[0067] F FY,i 、F TM,i 、F HY,i - respectively correspond to the average carbon emission factors of labor in each sub-stage of demolition construction and site clearance and transportation.

[0068] Furthermore, in step 5, the specific steps for calculating the carbon emissions during the reuse of recycled foam concrete are as follows:

[0069] Firstly, the recycling information of foam concrete and the carbon emission factor of the reproduction machinery shift are obtained;

[0070] Then calculate the carbon emissions during the recycling stage:

[0071] E recycle =E JG +E JY

[0072] E JG =S JG,i R JG,i +N JG,i F JG,i

[0073] E JY =M JY,i H JY,i T JY,i +N JY,i F JY,i

[0074] Where:

[0075] E recycle - Carbon emissions from the reuse of recycled foam concrete;

[0076] E JG - Carbon emissions from the processing of recycled materials;

[0077] E JY - Carbon emissions from the transportation of recyclables after processing;

[0078] S JG,i - The duration of use of the i-th type of processing machinery and equipment;

[0079] R JG,i -Energy carbon emission factor per unit time of the i-th processing machinery and equipment;

[0080] M JY,i - the weight of the recyclables after processing;

[0081] H JY,i - the average distance recyclables are transported after processing;

[0082] T JY,i - Carbon emission factor per unit mass of transport distance of recyclables after processing at the processing plant;

[0083] N JG,i 、N JY,i - respectively corresponds to the man-hours required for each sub-stage of recycling;

[0084] F JG,i 、F JY,i - respectively correspond to the average carbon emission factors of labor in each sub-stage of recycling reuse.

[0085] Furthermore, in step 6, the specific steps for calculating the total carbon emissions of foamed concrete over its entire life cycle are:

[0086] E LCA =E materials +E transport +E construction +E demolition +E recycle

[0087] Where:

[0088] E LCA -Total carbon emissions of foamed concrete over its entire life cycle;

[0089] E materials - Carbon emissions during the production of raw materials for foamed concrete;

[0090] E transport -Carbon emissions from the logistics and transportation of raw materials for foamed concrete;

[0091] E construction - Carbon emissions during the construction phase of foam concrete construction;

[0092] E demolition - Carbon emissions from the foam concrete demolition construction and site clearance and transportation phases;

[0093] E recycle - Carbon emissions during the reuse phase of recycled foam concrete.

[0094] Compared with the existing technology, the present invention has the following beneficial effects: (1) The present invention proposes a carbon emission evaluation method for the entire life cycle of foamed concrete, and specifically calculates the carbon emission of the five stages of the entire life cycle of foamed concrete, namely production, transportation, construction, demolition and recycling. The artificial carbon emission is taken into account in each link, and the emission source in each link is determined by combining literature review and field investigation; (2) The carbon footprint of foamed concrete throughout its entire life cycle is obtained, which fills the gap in the evaluation method of foamed concrete throughout its entire life cycle, reduces the difficulty of calculation, reduces the calculation time, and helps designers and decision makers calculate the carbon emission data of silica fume-vegetated concrete in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] Figure 1 It is a flow chart of a foam concrete carbon emission evaluation method based on the entire life cycle of the present invention. DETAILED DESCRIPTION

[0096] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0097] In order to quantify the carbon emissions generated in the production process of foam concrete, the production of 1 ton (t) of foam concrete was taken as the research object. The total carbon emissions of foam concrete were calculated based on the life cycle method through field survey data.

[0098] like Figure 1 As shown, a foam concrete carbon emission evaluation method based on the whole life cycle includes the following steps:

[0099] Step 1, obtaining the material consumption of foamed concrete and the corresponding carbon emission factor of material production, and calculating the carbon emission of the raw material production stage of foamed concrete;

[0100] Step 2, obtaining the transportation distance of foam concrete and the carbon emission factor of the corresponding transportation mode, and calculating the carbon emission of the foam concrete logistics transportation stage;

[0101] Step 3, obtaining the construction information of foam concrete and the carbon emission factor of the construction machinery shift, and calculating the carbon emission of the foam concrete construction phase;

[0102] Step 4: Obtain the foam concrete demolition information and the carbon emission factor of the demolition machinery shift, and calculate the carbon emissions of the foam concrete demolition construction and site clearance and transportation stages;

[0103] Step 5, obtaining the recycling information of foam concrete and the carbon emission factor of the reproducing machinery shift, and calculating the carbon emission of the recycled foam concrete in the reuse stage;

[0104] Step 6, based on the carbon emissions in the foam concrete raw material production stage, the logistics and transportation stage, the construction stage, the demolition and site clearance and transportation stage, and the recycling and reuse stage, the total carbon emissions of foam concrete over its entire life cycle are accumulated.

[0105] In actual applications, the emission factors corresponding to emission sources mainly come from publicly released domestic and foreign reporting guidelines and related academic papers. The main reporting guidelines used include GB / T2589-2020 "General Principles for Calculating Comprehensive Energy Consumption", "2019 IPCC National Greenhouse Gas Inventory Guidelines", "Building Carbon Emission Standard" (GB / T51366-2019), "Guidelines for Calculating Carbon Emissions in Buildings", etc.

[0106] First, according to the material list of foam concrete, the usage information of cement, fly ash, admixtures and the corresponding carbon emission factor information are obtained;

[0107] Then calculate the carbon emissions during the raw material production stage:

[0108]

[0109] Where:

[0110] E materials - Carbon emissions during the production of raw materials for foamed concrete;

[0111] M SC,i - the amount used in the production process of the i-th raw material;

[0112] H SC,i - Carbon emission factor of raw materials of category i;

[0113] Q SC,i - The amount of electricity or fossil energy consumed by the machinery and equipment used in the preparation of the i-th raw material;

[0114] W SC,i - Carbon emission factor of electricity or fossil energy used in the preparation process of the i-th raw material;

[0115] N SC,i -Man-days required for the production of the i-th raw material;

[0116] F SC,i -The average carbon emission factor of the production labor of the ith raw material.

[0117] The carbon emission calculation of the foam concrete raw material production stage is shown in Table 1:

[0118] Table 1 Carbon emissions in the raw material production stage

[0119]

[0120] The carbon emissions from the production stage of raw materials for foamed concrete were calculated to be 441.60 kg.

[0121] Furthermore, in step 2, the specific steps for calculating the carbon emissions in the logistics and transportation stage of foam concrete are as follows:

[0122] First, obtain the transportation method, transportation distance and carbon emission factor information of each material;

[0123] Then calculate the carbon emissions during the logistics and transportation stage:

[0124]

[0125] Where:

[0126] E transport -Carbon emissions from the logistics and transportation of raw materials for foamed concrete;

[0127] T WL,i - average transportation distance of the ith material;

[0128] HWL,i - Carbon emission factor per unit distance for the i-th material under this mode of transportation;

[0129] M WL,i - the transport volume of the i-th material;

[0130] S WL,i -Carbon emission factor correction factor in logistics transportation process, no less than 1, in this example it is 1.2;

[0131] N WL,i -Man-hours required for the logistics and transportation stage of the i-th material;

[0132] F WL,i -The average carbon emission factor of the labor required in the logistics and transportation stage of the i-th material.

[0133] The calculation of carbon emissions during the logistics and transportation phase of foam concrete is shown in Table 2:

[0134] Table 2 Carbon emissions from the logistics and transportation stage of foam concrete

[0135]

[0136]

[0137] The carbon emissions from the logistics and transportation phase of foam concrete are calculated to be 4.66kg

[0138] Furthermore, in step 3, the specific steps for calculating the carbon emissions during the construction phase of foam concrete are as follows:

[0139] First, obtain the energy consumption of mechanical equipment used in construction of various materials and the carbon emission factor information of the energy consumption of mechanical equipment;

[0140] Then calculate the carbon emissions during the construction phase:

[0141]

[0142] Where:

[0143] E construction - Carbon emissions during the construction phase of foam concrete construction;

[0144] Q JZ,i - Energy consumption of machinery and equipment used for material i;

[0145] H JZ,i - Carbon emission factor of energy consumption of mechanical equipment used for material i;

[0146] N JZ,i -Man-days required for the construction phase of the i-th material;

[0147] FJZ,i - The average carbon emission factor for labor required during the construction phase of the i-th material.

[0148] The calculation of carbon emissions during the construction phase of foam concrete is shown in Table 3:

[0149] Table 3 Carbon emissions during the construction phase of foam concrete construction

[0150]

[0151]

[0152] The carbon emissions during the construction phase of foam concrete construction were calculated to be 9.03 kg

[0153] Furthermore, in step 4, the specific steps for calculating the carbon emissions during the foam concrete demolition construction and site clearance and transportation phase are as follows:

[0154] First, the energy consumption and corresponding carbon emission factors of the transportation equipment and mechanical equipment required for the demolition of foam concrete, the recycling of some garbage, and the landfill of non-recyclable garbage are obtained;

[0155] Then calculate the carbon emissions during the demolition construction and site clearance and transportation stages:

[0156] E demolition =E CS +E FY +E TM +E HY

[0157] E CS =Q CS H CS +N CS,i F CS,i

[0158] E FY =M FY,i D FY,i T FY,i +N FY,i F FY,i

[0159] E TM =Q TM H TM +N TM,i F TM,i

[0160] E HY =M HY,i D HY,i T HY,i +N HY,i F HY,i

[0161] Where:

[0162] E demolition - Carbon emissions from the foam concrete demolition construction and site clearance and transportation phases;

[0163] E CS - Carbon emissions during the demolition phase;

[0164] E FY - Carbon emissions during the waste transportation phase;

[0165] E TM - Carbon emissions from waste landfill;

[0166] E HY -Carbon emissions from the recycling and transportation phase;

[0167] Q CS , Q TM -Energy consumption of demolition construction and landfill machinery and equipment respectively;

[0168] H CS , H TM - Carbon emission factors of energy consumption of demolition construction and landfill machinery and equipment;

[0169] M FY,i 、M HY,i -The weight of waste and recyclables of the i-th material respectively;

[0170] D FY,i , D HY,i -The average transportation distance of waste and recyclables for the i-th material, respectively;

[0171] T FY,i , T HY,i - Carbon emission factors for the transport distance per unit mass of waste and recyclables of the i-th material;

[0172] N FY,i 、N TM,i 、N HY,i - Corresponds to the man-hours required for each sub-stage of demolition construction and site clearance and transportation;

[0173] F FY,i 、F TM,i 、F HY,i - respectively correspond to the average carbon emission factors of labor in each sub-stage of demolition construction and site clearance and transportation.

[0174] The carbon emission calculation of foam concrete demolition construction and site clearance and transportation is shown in Table 4:

[0175] Table 4 Carbon emissions from foam concrete demolition construction and site clearance and transportation

[0176]

[0177]

[0178] The carbon emissions from the foam concrete demolition construction and site clearance and transportation stages were calculated to be 49.51 kg.

[0179] Furthermore, in step 5, the recycled foam concrete can be processed and reused, mainly for the following purposes: recycled building materials, thermal insulation materials, soil improvement, and gardening substrates. The specific steps for calculating the carbon emissions of recycled foam concrete are as follows:

[0180] Firstly, the recycling information of foam concrete and the carbon emission factor of the reproduction machinery shift are obtained;

[0181] Then calculate the carbon emissions during the recycling stage:

[0182] E recycle =E JG +E JY

[0183] E JG =S JG,i R JG,i +N JG,i F JG,i

[0184] E JY =M JY,i H JY,i T JY,i +N JY,i F JY,i

[0185] Where:

[0186] E recycle - Carbon emissions from the reuse of recycled foam concrete;

[0187] E JG - Carbon emissions from the processing of recycled materials;

[0188] E JY - Carbon emissions from the transportation of recyclables after processing;

[0189] S JG,i - The duration of use of the i-th type of processing machinery and equipment;

[0190] R JG,i -Energy carbon emission factor per unit time of the i-th processing machinery and equipment;

[0191] M JY,i - the weight of the recyclables after processing;

[0192] HJY,i - the average distance recyclables are transported after processing;

[0193] T JY,i - Carbon emission factor per unit mass of transport distance of recyclables after processing at the processing plant;

[0194] N JG,i 、N JY,i - respectively corresponds to the man-hours required for each sub-stage of recycling;

[0195] F JG,i 、F JY,i - respectively correspond to the average carbon emission factors of labor in each sub-stage of recycling reuse.

[0196] The calculation of carbon emissions from the reuse of recycled foam concrete is shown in Table 5:

[0197] Table 5 Carbon emissions from the reuse of recycled foam concrete

[0198]

[0199]

[0200] The carbon emissions from the reuse stage of recycled foam concrete are calculated to be 16.77 kg.

[0201] Furthermore, in step 6, the specific steps for calculating the total carbon emissions of foamed concrete over its entire life cycle are:

[0202] E LCA =E materials +E transport +E constrution +E demolition +E recycle

[0203] Where:

[0204] E LCA -Total carbon emissions of foamed concrete over its entire life cycle;

[0205] E materials - Carbon emissions during the production of raw materials for foamed concrete;

[0206] E transport -Carbon emissions from the logistics and transportation of raw materials for foamed concrete;

[0207] E construction - Carbon emissions during the construction phase of foam concrete construction;

[0208] E demolition - Carbon emissions from the foam concrete demolition construction and site clearance and transportation phases;

[0209] E recycle - Carbon emissions during the reuse phase of recycled foam concrete.

[0210] The total carbon emissions during the entire life cycle of foam concrete are calculated to be 521.57 kg.

Claims

1. A method for evaluating carbon emissions of foamed concrete based on the entire life cycle, characterized in that: The steps include: (1) Obtain the material consumption of foamed concrete and the corresponding carbon emission factor of material production, and calculate the carbon emissions of the raw material production stage of foamed concrete; (2) Obtain the transportation distance of foam concrete and the carbon emission factor of the corresponding transportation mode, and calculate the carbon emissions of the foam concrete logistics transportation stage; (3) Obtain the construction information of foam concrete and the carbon emission factor of the construction machinery shift, and calculate the carbon emissions during the construction phase of foam concrete; (4) Obtain the demolition information of foam concrete and the carbon emission factor of the demolition machinery shift, and calculate the carbon emissions of the foam concrete demolition construction and site clearance and transportation stages; (5) Obtain the recycling information of foam concrete and the carbon emission factor of the reproduction machinery shift, and calculate the carbon emissions of the recycled foam concrete in the reuse stage; (6) The total carbon emissions of foam concrete over its entire life cycle are calculated by adding up the carbon emissions from the production of raw materials for foam concrete, the logistics and transportation stage, the construction stage, the demolition and transportation stage, and the recycling and reuse stage.

2. A foam concrete carbon emission evaluation method based on the whole life cycle according to claim 1, characterized in that: In step (1), the specific steps for calculating the carbon emissions during the production of raw materials for foamed concrete are: First, according to the material list of foam concrete, the usage information of cement, fly ash, admixtures and the corresponding carbon emission factor information are obtained; Then calculate the carbon emissions during the raw material production stage: Where: E materials - Carbon emissions during the production of raw materials for foamed concrete; M SC,i - the amount used in the production process of the i-th raw material; H SC,i - Carbon emission factor of raw materials of category i; Q SC,i - The amount of electricity or fossil energy consumed by the machinery and equipment used in the preparation of the i-th raw material; W SC,i - Carbon emission factor of electricity or fossil energy used in the preparation process of the i-th raw material; N SC,i -Man-days required for the production of the i-th raw material; F SC,i - The average carbon emission factor of the production labor of the ith raw material.

3. The method for evaluating carbon emissions of foamed concrete based on the entire life cycle according to claim 1 is characterized in that: In step (2), the specific steps for calculating the carbon emissions in the logistics and transportation stage of foam concrete are as follows: First, obtain the transportation method, transportation distance and carbon emission factor information of each material; Then calculate the carbon emissions during the logistics and transportation stage: Where: E transport -Carbon emissions from the logistics and transportation of raw materials for foamed concrete; T WL,i - average transportation distance of the ith material; H WL,i - Carbon emission factor per unit distance for the i-th material under this mode of transportation; M WL,i - the transport volume of the i-th material; S WL,i -Carbon emission factor correction coefficient during logistics transportation shall not be less than 1; N WL,i -Man-hours required for the logistics and transportation stage of the i-th material; F WL,i -The average carbon emission factor of the labor required in the logistics and transportation stage of the i-th material.

4. The method for evaluating carbon emissions of foamed concrete based on the entire life cycle according to claim 1 is characterized in that: In step (3), the specific steps for calculating the carbon emissions during the construction phase of foam concrete are: First, obtain the energy consumption of mechanical equipment used in construction of various materials and the carbon emission factor information of the energy consumption of mechanical equipment; Then calculate the carbon emissions during the construction phase: Where: E construction - Carbon emissions during the construction phase of foam concrete construction; Q JZ,i - Energy consumption of machinery and equipment used for material i; H JZ,i - Carbon emission factor of energy consumption of mechanical equipment used for material i; N JZ,i -Man-days required for the construction phase of the i-th material; F JZ,i - The average carbon emission factor for labor required during the construction phase of the i-th material.

5. The method for evaluating carbon emissions of foamed concrete based on the entire life cycle according to claim 1 is characterized in that: In step (4), the specific steps for calculating the carbon emissions during the foam concrete demolition construction and site clearance and transportation stage are as follows: First, the energy consumption and corresponding carbon emission factors of the transportation equipment and mechanical equipment required for the demolition of foam concrete, the recycling of some garbage, and the landfill of non-recyclable garbage are obtained; Then calculate the carbon emissions during the demolition construction and site clearance and transportation stages: AND demolition =And CS +E FY +E TM +E HY E CS =Q CS H CS +N CS,i F CS,i E FY =M FY,i D FY,i T FY,i +N FY,i F FY,i E TM =Q TM H TM +N TM,i F TM,i E HY =M HY,i D HY,i T HY,i +N HY,i F HY,i Where: E demolition - Carbon emissions from the foam concrete demolition construction and site clearance and transportation phases; E CS - Carbon emissions during the demolition phase; E FY - Carbon emissions during the waste transportation phase; E TM - Carbon emissions from waste landfill; E HY -Carbon emissions from the recycling and transportation phase; Q CS , Q TM -Energy consumption of demolition construction and landfill machinery and equipment respectively; H CS , H TM - Carbon emission factors of energy consumption of demolition construction and landfill machinery and equipment; M FY,i 、M HY,i -The weight of waste and recyclables of the i-th material respectively; D FY,i , D HY,i -The average transportation distance of waste and recyclables for the i-th material, respectively; T FY,i , T HY,i - Carbon emission factors for the transport distance per unit mass of waste and recyclables of the i-th material; N FY,i 、N TM,i 、N HY,i - Corresponds to the man-hours required for each sub-stage of demolition construction and site clearance and transportation; F FY,i 、F TM,i 、F HY,i - respectively correspond to the average carbon emission factors of labor in each sub-stage of demolition construction and site clearance and transportation.

6. The method for evaluating carbon emissions of foamed concrete based on the entire life cycle according to claim 1 is characterized in that: In step (5), the specific steps for calculating the carbon emissions from the reuse of recycled foam concrete are as follows: Firstly, the recycling information of foam concrete and the carbon emission factor of the reproduction machinery shift are obtained; Then calculate the carbon emissions during the recycling stage: AND recycle =And JG +E JY E JG =S JG,i R JG,i +N JG,i F JG,i E JY =M JY,i H JY,i T JY,i +N JY,i F JY,i Where: E recycle - Carbon emissions from the reuse of recycled foam concrete; E JG - Carbon emissions from the processing of recycled materials; E JY - Carbon emissions from the transportation of recyclables after processing; S JG,i - The duration of use of the i-th type of processing machinery and equipment; R JG,i -Energy carbon emission factor per unit time of the i-th processing machinery and equipment; M JY,i - the weight of the recyclables after processing; H JY,i - the average distance recyclables are transported after processing; T JY,i - Carbon emission factor per unit mass of transport distance of recyclables after processing at the processing plant; N JG,i 、N JY,i - respectively corresponds to the man-hours required for each sub-stage of recycling; F JG,i 、F JY,i - respectively correspond to the average carbon emission factors of labor in each sub-stage of recycling reuse.

7. The method for evaluating carbon emissions of foamed concrete based on the entire life cycle according to claim 1 is characterized in that: In step (6), the specific steps for calculating the total carbon emissions of foam concrete over its entire life cycle are: AND LCA =And materials +E transport +E construction +E demolition +E recycle Where: E LCA -Total carbon emissions of foamed concrete over its entire life cycle; E materials - Carbon emissions during the production of raw materials for foamed concrete; E transport -Carbon emissions from the logistics and transportation of raw materials for foamed concrete; E construction - Carbon emissions during the construction phase of foam concrete construction; E demolition - Carbon emissions from the foam concrete demolition construction and site clearance and transportation phases; E recycle - Carbon emissions during the reuse phase of recycled foam concrete.

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