Decision analysis method for carbon emission reduction in production process of asphalt mixture

Abstract

The invention relates to an asphalt mixture production process carbon emission reduction decision analysis method, which comprises the following steps of: calculating the numerical value of carbon emission according to various parameters of raw material preparation, raw material transportation and mixture production stages required by asphalt concrete production, and establishing a corresponding emission reduction decision analysis method. The method is used for carbon emission reduction decision analysis in the asphalt concrete mixture production process. Compared with the prior art, the method has the advantages that influence factors, weight analysis and emission reduction countermeasure methods of carbon emission in raw material preparation and production processes are researched, and the technical defects of the carbon emission reduction decision analysis method in the existing asphalt concrete production process are overcome; the carbon emission reduction decision analysis method in the asphalt mixture production process is established and can be used for carbon emission calculation and carbon emission reduction decision analysis in the asphalt mixture production process.

Description

Technical Field

[0001] The present invention relates to the technical field of road engineering, and in particular to a decision-making analysis method for carbon emission reduction in an asphalt mixture production process. Background Art

[0002] The production and transportation of building materials, construction, and operation and maintenance of construction projects all consume a lot of resources and energy, and are one of the main sources of energy consumption in my country. The asphalt mixture required for road pavement construction contains raw materials such as asphalt, crushed stone aggregate, and mineral powder. The processing, transportation of raw materials, and the production of asphalt mixtures will all generate a certain amount of carbon emissions.

[0003] In recent years, the industry has mainly studied the carbon emission calculation methods of asphalt mixtures at various stages. For example, CN115881251A provides a carbon emission calculation and evaluation method for warm mix recycled asphalt concrete, including calculating specific carbon emission values ​​according to the mix design and construction parameters of warm mix recycled asphalt concrete, and establishing a corresponding evaluation method for quantitative calculation of carbon emissions in asphalt pavement construction, which can effectively evaluate the carbon emission level. For example, CN111368356A discloses a carbon emission calculation method for asphalt pavement construction, which involves three stages: production, transportation and pavement construction of asphalt pavement raw materials, and includes the following steps: determining the equivalent carbon emission factors of each raw material; determining the equivalent carbon emission factors of various energy sources; substituting the equivalent carbon emission factors, respectively calculating the carbon emissions of the raw material production, transportation and pavement construction stages, and accumulating the total carbon emissions of the asphalt pavement construction period. However, there is still a certain lack of research on the influencing factors, weight analysis and emission reduction countermeasures of carbon emissions in the raw material preparation and production process. Therefore, it is very necessary to construct a carbon emission reduction decision analysis method for the asphalt mixture production process. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a carbon emission reduction decision analysis method for the asphalt mixture production process. The influencing factors, weight analysis and emission reduction countermeasures of carbon emissions in the raw material preparation and production process are studied. In view of the technical deficiencies of the existing carbon emission reduction decision analysis method in the asphalt concrete production process, a carbon emission reduction decision analysis method for the asphalt mixture production process is established, which can be used for carbon emission calculation and carbon emission reduction decision analysis in the asphalt mixture production process.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The purpose of the present invention is to provide a decision-making analysis method for carbon emission reduction in an asphalt mixture production process, the method comprising the following steps:

[0007] Step 1: Divide the production process of asphalt mixture into the preparation stage T 1 , Material transportation stage T 2 , Mixture production stage T 3 ;

[0008] Step 2: Calculate the carbon emissions C of asphalt, crushed stone aggregate and mineral powder materials A1 , C A2 , C A3 , and then calculate the material preparation stage T 1 The total carbon emissions Q A ;

[0009] Step 3: Calculate the carbon emissions C from the transportation of asphalt, crushed stone aggregate, and mineral powder materials B1 , C B2 , C B3 , and then calculate the material transportation stage T 2 The total carbon emissions Q B ;

[0010] Step 4: Calculate the carbon emissions C of the i-th (i is a positive integer) type of energy combustion Ci , and then calculate the production mixing stage T 3 The total carbon emissions Q C ;

[0011] Step 5: Calculate the asphalt mixture production process including the material preparation stage T 1 , Material transportation stage T 2 , Mixture production stage T 3 The total carbon emissions in the stage is Q;

[0012] Step 6: Calculate the ratio K of each sub-item carbon emission to the total carbon emission Q ci ;

[0013] Step 7: calculate the carbon emission percentage of each sub-item K ci Sort from large to small, find out the names of the top 3 to 5 sub-items, and propose emission reduction decision-making measures from the aspects of utilization of old materials, local procurement of raw materials, utilization of clean energy, and reconstruction of processes based on the top 3 to 5 sub-items.

[0014] Furthermore, step 7 specifically includes the following process:

[0015] In the material preparation stage, for carbon emissions from asphalt materials, emission reduction measures such as optimizing material mix ratios and reducing asphalt oil consumption are adopted; for carbon emissions from crushed stone aggregates, emission reduction measures such as recycling of old asphalt concrete materials are adopted; for carbon emissions from mineral powder materials, emission reduction measures such as recycling of old materials and substitution of environmentally friendly materials are adopted. In the material transportation stage, for carbon emissions from asphalt material transportation, emission reduction measures such as local procurement of raw materials and short-distance transportation are adopted; for carbon emissions from the transportation of crushed stone aggregates, emission reduction measures such as long-distance waterway shipping of raw materials, or local procurement and transportation of raw materials, or recycling of local old materials are adopted; for carbon emissions from the transportation of mineral powder materials, emission reduction measures such as local procurement and transportation of raw materials are adopted. In the mixed material mixing stage, carbon emission reduction measures such as optimizing and improving the mixed material mixing process of the mixing plant or using clean energy combustion to supply energy, reducing asphalt insulation and main burner energy consumption are adopted.

[0016] Furthermore, after step 7, perform the following steps:

[0017] Step 8: Calculate the total carbon emissions Q after taking emission reduction measures according to steps 1 to 5. g , and Q g Make a numerical comparison with the total carbon emissions Q before taking emission reduction measures to quantify the emission reduction effect.

[0018] Furthermore, step 2 specifically includes the following process:

[0019] Determine the material preparation stage T 1 The calculation range of raw materials required in the process (raw materials with a weight ratio of <0.5% are not counted), determine the asphalt-stone ratio k of the asphalt mixture, and calculate the asphalt dosage (weight) g based on the asphalt-stone ratio k 1 ; Then determine the amount of crushed stone aggregate (weight) g 2 , the amount of mineral powder is (weight) g 3 , and determine the carbon emission factor f of asphalt materials c1 , carbon emission factor f of crushed stone aggregate c2 , the carbon emission factor f of mineral powder material c3 ;

[0020] According to the above parameters, the carbon emissions C of asphalt, crushed stone aggregate and mineral powder materials are calculated respectively. A1 , C A2 , C A3 ;

[0021] Calculate the material preparation stage T 1 The total carbon emissions Q A .

[0022] Further, in step 2, the g 1 , C A1 , C A2 , C A3, Q A Obtained through the following processes:

[0023]

[0024] C A1 =g 1 ×f c1

[0025] C A2 =g 2 ×f c2

[0026] C A3 =g 3 ×f c3

[0027] Q A =C A1 +C A2 +C A3 .

[0028] Furthermore, step 3 specifically includes the following process:

[0029] Determine the transportation distances of asphalt, crushed stone aggregate, and mineral powder materials to the factory respectively. 1 , D 2 , D 3 , determine the carbon emission factors of each ton of asphalt, crushed stone aggregate, and mineral powder material per unit transportation distance and the corresponding transportation mode are f d1 、f d2 、f d3 , calculate the carbon emissions C of asphalt, crushed stone aggregate and mineral powder materials based on the above parameters B1 , C B2 , C B3 ;

[0030] Calculation of material transport phase T 2 The total carbon emissions Q B .

[0031] Further, in step 3, the C B1 , C B2 , C B3 , Q B Obtained through the following processes:

[0032] C B1 =g 1 ×D 1 ×f c1

[0033] C B2 =g 2 ×D 2 ×fc2

[0034] C B3 =g 3 ×D 3 ×f c3

[0035] Q B =C B1 +C B2 +C B3 .

[0036] Furthermore, step 4 specifically includes the following process:

[0037] Determine the energy consumption of the i-th category in the production process of mixed material heating and mixing as N i , the carbon emission factor of the i-th type of energy consumption combustion is f ri , calculate the carbon emissions C of the i-th type of energy combustion based on the above parameters Ci ;

[0038] Calculation of production mixing stage T 3 The total carbon emissions Q C .

[0039] Further, in step 4, the C Ci , Q C Obtained through the following processes:

[0040] C C1 =N 1 ×fr 1

[0041] C C2 =N 2 ×fr 2

[0042] C C3 =N 3 ×fr 3

[0043] …………

[0044] C Ci =N i ×fr i

[0045] Q C =C C1 +C C2 +C C3 +…+C Ci .

[0046] Optionally, the first type of energy is the energy required for the heating mixing system, the second type of energy is the energy required for asphalt insulation, and the third type of energy is the energy required for the main burner of the cold material heating system.

[0047] Optionally, the required energy sources include: gas fuel (such as natural gas, etc.), liquid fuel (heavy oil, liquefied natural gas, etc.), solid fuel (anthracite, etc.), electricity, etc.

[0048] Further, in step 5, Q is obtained by the following process:

[0049] Q=Q A +Q B +Q C Furthermore, step 6 specifically includes the following process:

[0050] Calculate the ratio of each sub-item carbon emission to the total carbon emission, including the carbon emission ratio of asphalt materials K a1 , Carbon emissions from crushed stone aggregate materials account for K a2 , the carbon emission of mineral powder materials accounts for K a3 , carbon emissions from asphalt material transportation account for K b1 , the carbon emissions from the transportation of crushed aggregate materials account for K b2 , Carbon emissions from mineral powder transportation account for K b3 , the carbon emissions from the combustion of the i-th type of energy in the process of mixed material production account for K ci .

[0051] Further, in step 6, the K a1 , K a2 , K a3 , K b1 , K b2 , K b3 , K ci Obtained through the following process:

[0052] K a1 =C A1 / Q

[0053] K a2 =C A2 / Q

[0054] K a3 =C A3 / Q

[0055] K b1 =C B1 / Q

[0056] K b2 =C B2 / Q

[0057] K b3 =CB3 / Q

[0058] K c1 =C C1 / Q

[0059] K c2 =C C2 / Q

[0060] K c3 =C C3 / Q

[0061] …………

[0062] K ci =C Ci / Q.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] 1) The technical solution provides a carbon emission reduction decision analysis method for the asphalt mixture production process. It studies the influencing factors, weight analysis and emission reduction countermeasures of carbon emissions in the raw material preparation and production process. In view of the technical deficiencies of the existing carbon emission reduction decision analysis method in the asphalt concrete production process, a carbon emission reduction decision analysis method for the asphalt mixture production process is established, which can be used for carbon emission calculation and carbon emission reduction decision analysis in the asphalt mixture production process.

[0065] 2) This technical solution provides a decision-making analysis method for carbon emission reduction in the asphalt mixture production process. It calculates the carbon emission value based on the various parameters of the raw material preparation, raw material transportation and mixture production stages required for asphalt concrete production, and sorts the carbon emission proportions of the corresponding sub-items in different stages to provide easy-to-understand information to decision makers, establish a systematic and comprehensive scientific and technological support for decision analysis, and help decision makers formulate scientific and effective carbon emission reduction strategies for the asphalt mixture production process.

[0066] 3) The technical solution provides a carbon emission reduction decision analysis method for the asphalt mixture production process, which can quantify and calculate the emission reduction effect. DETAILED DESCRIPTION

[0067] The present invention is described in detail below in conjunction with specific embodiments. The features such as component models, material names, connection structures, control methods, etc. that are not clearly described in this technical solution are all regarded as common technical features disclosed in the prior art.

[0068] The present invention provides a carbon emission reduction decision analysis method for an asphalt mixture production process, comprising the following steps:

[0069] Step 1: Taking the production of 1 ton of mixture as the unit, the production process of asphalt mixture is divided into the preparation stage T 1 , Material transportation stage T 2 , Mixture production stage T 3 Three stages.

[0070] Step 2: Determine the material preparation stage T 1 The calculation range of raw materials required in the process (raw materials with a weight ratio of <0.5% are not counted), determine the asphalt-stone ratio k of the asphalt mixture, and calculate the asphalt dosage (weight) g based on the asphalt-stone ratio k 1 ; Then determine the amount of crushed stone aggregate (weight) g 2 , the amount of mineral powder is (weight) g 3 , and determine the carbon emission factor f of asphalt materials c1 , carbon emission factor f of crushed stone aggregate c2 , the carbon emission factor f of mineral powder material c3 ; Calculate the carbon emissions C of asphalt, crushed stone aggregate and mineral powder materials respectively according to the above parameters A1 , C A2 , C A3 ; Then calculate the total carbon emissions Q in the preparation stage T1 A :

[0071]

[0072] C A1 =g 1 ×f c1

[0073] C A2 =g 2 ×f c2

[0074] C A3 =g 3 ×f c3

[0075] Q A =C A1 +C A2 +C A3 .

[0076] Step 3: Determine the transportation distances of asphalt, crushed stone aggregate, and mineral powder materials to the factory, respectively. 1 , D 2 , D 3 , determine the carbon emission factors of each ton of asphalt, crushed stone aggregate, and mineral powder material per unit transportation distance and the corresponding transportation mode are f d1 、f d2 、f d3, based on the above parameters, calculate the carbon emissions C of asphalt, crushed stone aggregate, and mineral powder transportation B1 , C B2 , C B3 ; Then calculate the material transportation stage T 2 The total carbon emissions Q B :

[0077] C B1 =g 1 ×D 1 ×f c1

[0078] C B2 =g 2 ×D 2 ×f c2

[0079] C B3 =g 3 ×D 3 ×f c3

[0080] Q B =C B1 +C B2 +C B3 .

[0081] Step 4: Determine the energy consumption of the i-th category in the mixed material heating and mixing production process as N i , the carbon emission factor of the i-th type of energy consumption combustion is f ri , calculate the carbon emissions C of the i-th type of energy combustion based on the above parameters Ci ; Then calculate the total carbon emissions QC of the production mixing stage T3:

[0082] C C1 =N 1 ×fr 1

[0083] C C2 =N 2 ×fr 2

[0084] C C3 =N 3 ×fr 3

[0085] …………

[0086] C Ci =N i ×fr i

[0087] Q C =C C1 +C C2 +CC3 +…+C Ci .

[0088] Step 5: Calculate the asphalt mixture production process including the material preparation stage T 1 , Material transportation stage T 2 , Mixture production stage T 3 Total carbon emissions in the stage Q:

[0089] Q=Q A +Q B +Q C .

[0090] Step 6: Calculate the ratio of each sub-item carbon emission to the total carbon emission, including the ratio of asphalt material carbon emission to total carbon emission. a1 , Carbon emissions from crushed stone aggregate materials account for K a2 , the carbon emission of mineral powder materials accounts for K a3 , carbon emissions from asphalt material transportation account for K b1 , the carbon emissions from the transportation of crushed aggregate materials account for K b2 , Carbon emissions from mineral powder transportation account for K b3 , the carbon emissions from the combustion of the i-th type of energy in the process of mixed material production account for K ci :

[0091] K a1 =C A1 / Q

[0092] K a2 =C A2 / Q

[0093] K a3 =C A3 / Q

[0094] K b1 =C B1 / Q

[0095] K b2 =C B2 / Q

[0096] K b3 =C B3 / Q

[0097] K c1 =C C1 / Q

[0098] K c2 =C C2 / Q

[0099] K c3 =C C3 / Q

[0100] …………

[0101] K ci =C Ci / Q.

[0102] Step 7: calculate the carbon emission percentage of each sub-item K ci Sort from large to small, find out the names of the top 3 to 5 sub-items, and propose emission reduction decision-making measures from the aspects of recycling of old materials, local procurement of raw materials, utilization of clean energy, and process modification.

[0103] Step 8: Calculate the total carbon emissions Q after taking emission reduction measures according to steps 1 to 5 above. g , and Q g Make a numerical comparison with the total carbon emissions Q before taking emission reduction measures to quantify the emission reduction effect.

[0104] Example 1

[0105] This embodiment provides a decision-making analysis method for carbon emission reduction in an asphalt mixture production process.

[0106] A certain highway 1 is paved with asphalt concrete pavement, and the upper layer is fine-grained asphalt concrete. In the asphalt mixture design, the amount of crushed stone aggregate is 90.24% and the amount of mineral powder is 5%.

[0107] The above-mentioned carbon emission reduction decision analysis method in the asphalt mixture production process includes the following steps:

[0108] Step 1: Taking the production of 100t of mixture as a unit, the production process of asphalt mixture is divided into the preparation stage T 1 , Material transportation stage T 2 , Mixture production stage T 3 Three stages.

[0109] Step 2: Determine the material preparation stage T 1 The calculation range of raw materials required in the process (raw materials with a weight ratio of <0.5% are not counted), the oil-rock ratio of the asphalt mixture is determined to be 5%, and the asphalt consumption (weight) is calculated to be 4.76t based on the oil-rock ratio; the crushed stone aggregate consumption (weight) is determined to be 90.24t, and the mineral powder consumption is (weight) 5t; the carbon emission factor of the asphalt material is determined to be 248kgCO 2 e / t, the carbon emission factor of crushed stone aggregate and slag is 2.18kg CO 2 e / t; Calculate the carbon emissions of asphalt, crushed stone aggregate and mineral powder materials C according to the above parameters A1 , C A2 , C A3 ; Then calculate the material preparation stage T 1 The total carbon emissions Q A :

[0110] C A1 =4.76×248=1180.5(kgCO 2 e)

[0111] C A2 =90.24×2.18=196.7(kgCO 2 e)

[0112] C A3 =5×2.18=10.9(kgCO 2 e)

[0113] Q A =1180.5+196.7+10.9=1388.1(kgCO 2 e)

[0114] Step 3: Determine that among the purchased raw materials, asphalt is transported by road, crushed stone aggregate and mineral powder are transported by ship, and the transportation distances of asphalt, crushed stone aggregate and mineral powder to the factory are 50km, 600km and 600km respectively; determine that the carbon emission factors of each ton of asphalt, crushed stone aggregate and mineral powder per unit transportation distance and the corresponding transportation methods are 0.129kgCO 2 e / (t.km), 0.015kgCO 2 e / (t.km), 0.129kgCO 2 e / (t.km), and calculate the carbon emissions of asphalt, crushed stone aggregate, and mineral powder materials C based on the above parameters. B1 , C B2 , C B3 ; Then calculate the material transportation stage T 2 The total carbon emissions Q B :

[0115] C B1 =4.76×50×0.129=30.7(kgCO 2 e)

[0116] C B2 =90.24×600×0.015=812.2(kgCO 2 e)

[0117] C B3 =5×600×0.129=387.0(kgCO 2 e)

[0118] Q B =30.7+812.2+387=1229.9(kgCO 2 e)

[0119] Step 4: Determine that the power consumption of the heating mixing system during the mixed material mixing production process is 200kWh, the natural gas consumption required for asphalt insulation is 1.92KJ, the natural gas consumption required for the main burner of the cold material heating system is 33.6KJ, and the carbon emission factor of the power energy is 0.7035kgCO 2 / kWh, the carbon emission factor of natural gas combustion is 55.54tCO 2 / TJ, calculate the carbon emissions C of the i-th type of energy combustion based on the above parameters Ci ; Then calculate the production mixing stage T 3 The total carbon emissions Q C :

[0120] C C1 =200×0.7035=140.7(kgCO 2 )

[0121] C C2 =1.92×55.54=106.6(kgCO 2 )

[0122] C C3 =33.6×55.54=1866.1(kgCO 2 )

[0123] Q C =140.7+106.6+1866.1=2113.4(kgCO 2 )

[0124] Step 5: Calculate the production process of asphalt mixture including the material preparation stage T 1 , Material transportation stage T 2 , Mixture production stage T 3 Total carbon emissions in the stage Q:

[0125] Q=1388.1+1229.9+2113.4=4731.4(kgCO 2 e)

[0126] Step 6: Calculate the ratio of each sub-item carbon emission to the total carbon emission. The carbon emission of asphalt materials accounts for K a1 , Carbon emissions from crushed stone aggregate materials account for K a2 , the carbon emission of mineral powder materials accounts for K a3 , carbon emissions from asphalt material transportation account for K b1 , the carbon emissions from the transportation of crushed aggregate materials account for K b2 , Carbon emissions from mineral powder transportation account for K b3 , the carbon emissions from the combustion of the i-th type of energy in the process of mixed material production account for K ci :

[0127]

[0128]

[0129]

[0130]

[0131]

[0132]

[0133]

[0134]

[0135]

[0136] Step 7: Sort the carbon emission percentage values ​​from large to small, and find the top 4 values, which are K c3 (Asphalt insulation natural gas combustion, 39.44%), K a1 (asphalt material preparation, 24.95%), K b2 (Crushed stone aggregate material transportation, 17.17%), K b3 (Mineral powder material transportation, 8.18%). This example proposes corresponding emission reduction measures from the aspects of energy consumption of asphalt insulation in the mixing plant, preparation and transportation of crushed stone aggregates, etc.: improve the mixing process of the mixing plant to reduce the natural gas consumption of the main burner of the cold material heating system by 5%, and use the recycled asphalt concrete materials in the area to make the new and old materials ratio of crushed stone aggregates 1:1, reducing the amount of new materials purchased and the oil energy consumption of long-distance transportation.

[0137] Step 8: According to the above steps 1 to 5, calculate the total carbon emissions Q after taking emission reduction measures g :

[0138] Q g =3930.7(kgCO 2 e)

[0139] Step 9: Total carbon emissions after taking emission reduction measures Q g Compared with the total carbon emissions Q before taking emission reduction measures, the calculated reduction in carbon emissions is 800.7kgCO 2 e, reduced by about 16.9%, achieving a good emission reduction effect.

[0140] ΔQ=Q g -Q=4731.4-3930.7=800.7(kgCO 2e)

[0141] Example 2

[0142] Based on Example 1, this embodiment further proposes a device for carbon emission reduction decision analysis in the asphalt mixture production process, the device includes a processor and a memory, the processor and the memory are coupled, the memory stores program instructions, and the above-mentioned task management method is implemented when the program instructions stored in the memory are executed by the processor. The processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components; the memory may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The memory may be an internal memory of the random access memory (RAM) type, and the processor and memory may be integrated into one or more independent circuits or hardware, such as an application specific integrated circuit (ASIC). It should be noted that the computer program in the above-mentioned memory may be implemented in the form of a software functional unit and may be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention may essentially or partly contribute to the prior art or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for enabling a computer device (which may be a personal computer, an electronic device, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention.

[0143] This embodiment also proposes a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the above-mentioned carbon emission reduction decision analysis method for the asphalt mixture production process. The storage medium can be an electronic medium, a magnetic medium, an optical medium, an electromagnetic medium, an infrared medium or a semiconductor system or a propagation medium. The storage medium can also include a semiconductor or solid-state memory, a magnetic tape, a removable computer disk, a random access memory (RAM), a read-only memory (ROM), a hard disk, and an optical disk. The optical disk can include a compact disk-read only memory (CD-ROM), a compact disk-read / write (CD-RW), and a DVD.

[0144] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A decision-making analysis method for carbon emission reduction in asphalt mixture production process, characterized in that: The method comprises the following steps: Step 1, dividing the asphalt mixture production process into material preparation stage T1, material transportation stage T2, and mixture production stage T3; Step 2: Calculate the carbon emissions C of asphalt, crushed stone aggregate and mineral powder materials A1 , C A2 , C A3 , and then calculate the total carbon emissions Q in the preparation stage T1 A ; Step 3: Calculate the carbon emissions C from the transportation of asphalt, crushed stone aggregate, and mineral powder materials B1 , C B2 , C B3 , and then calculate the total carbon emissions Q of the material transportation stage T2 B ; Step 4: Calculate the carbon emissions C from the combustion of the i-th energy source Ci , and then calculate the total carbon emissions Q of the production mixing stage T3 C ; Step 5, calculating the total carbon emissions Q of the asphalt mixture production process including the material preparation stage T1, the material transportation stage T2, and the mixture production stage T3; Step 6: Calculate the ratio K of each sub-item carbon emission to the total carbon emission Q ci ; Step 7: calculate the carbon emission percentage of each sub-item K ci They are sorted from large to small, and emission reduction decision-making measures are proposed based on the top 3 to 5 in terms of utilization of old materials, local procurement of raw materials, utilization of clean energy, and improvement of processes.

2. According to claim 1, a carbon emission reduction decision analysis method for asphalt mixture production process is characterized in that: After step 7, perform the following steps: Step 8: Calculate the total carbon emissions Q after taking emission reduction measures according to steps 1 to 5. g , and Q g Make a numerical comparison with the total carbon emissions Q before taking emission reduction measures to quantify the emission reduction effect.

3. According to claim 1, a carbon emission reduction decision analysis method for asphalt mixture production process is characterized in that: Step 2 specifically includes the following process: Determine the calculation range of raw materials required during the material preparation stage T1, determine the oil-stone ratio k of the asphalt mixture, and calculate the asphalt dosage g1 based on the oil-stone ratio k; then determine the amount of crushed stone aggregate as g2, the amount of mineral powder as g3, and determine the carbon emission factor f of the asphalt material c1 , the carbon emission factor f of crushed stone aggregate c2 , the carbon emission factor f of mineral powder material c3 ; Calculate the carbon emissions C of asphalt, crushed stone aggregate and mineral powder materials separately A1 , C A2 , C A3 ; Calculate the total carbon emissions Q during the material preparation stage T1 A .

4. According to claim 3, a carbon emission reduction decision analysis method for asphalt mixture production process is characterized in that: In step 2, the g1, C A1 , C A2 , C A3 , Q A Obtained through the following processes: C A1 =g1×f c1 C A2 =g2×f c2 C A3 =g3×f c3 Q A =C A1 +C A2 +C A3 。 5. According to claim 4, a carbon emission reduction decision analysis method for asphalt mixture production process is characterized in that: Step 3 specifically includes the following process: Determine the transportation distances of asphalt, crushed stone aggregate, and mineral powder materials in the raw materials to the factory as D1, D2, and D3 respectively, and determine the carbon emission factors of each ton of asphalt, crushed stone aggregate, and mineral powder materials per unit transportation distance and the corresponding transportation methods as f d1 、f d2 、f d3 , calculate the carbon emissions C of asphalt, crushed stone aggregate and mineral powder materials based on the above parameters B1 , C B2 , C B3 ; Calculate the total carbon emissions Q of the material transportation stage T2 B .

6. According to claim 5, a carbon emission reduction decision analysis method for asphalt mixture production process is characterized in that: In step 3, the C B1 , C B2 , C B3 , Q B Obtained through the following processes: C B1 =g1×D1×f c1 C B2 =g2×D2×f c2 C B3 =g3×D3×f c3 Q B =C B1 +C B2 +C B3 。 7. According to claim 6, a carbon emission reduction decision analysis method for asphalt mixture production process is characterized in that: Step 4 specifically includes the following process: Determine the energy consumption of the i-th category in the production process of mixed material heating and mixing as N i , the carbon emission factor of the i-th type of energy consumption combustion is f ri , calculate the carbon emissions C of the i-th type of energy combustion based on the above parameters Ci ; Calculate the total carbon emissions Q during the production mixing stage T3 C .

8. According to claim 7, a carbon emission reduction decision analysis method for asphalt mixture production process is characterized in that: In step 4, the C Ci , Q C Obtained through the following processes: C C1 =N1×fr1 C C2 =N2×fr2 C C3 =N3×fr3 ………… C Ci =N i ×fr i Q C =C C1 +C C2 +C C3 +…+C Ci 。 9. The carbon emission reduction decision analysis method for asphalt mixture production process according to claim 1 is characterized in that: In step 5, Q is obtained by the following process: Q=Q A +Q B +Q C 。 10. The carbon emission reduction decision analysis method for asphalt mixture production process according to claim 1 is characterized in that: Step 6 specifically includes the following process: Calculate the ratio of each sub-item carbon emission to the total carbon emission, including the carbon emission ratio of asphalt materials K a1 , Carbon emissions from crushed stone aggregate materials account for K a2 , the carbon emission of mineral powder materials accounts for K a3 , carbon emissions from asphalt material transportation account for K b1 , the carbon emissions from the transportation of crushed stone aggregate materials account for K b2 , Carbon emissions from mineral powder transportation account for K b3 , the carbon emissions from the combustion of the i-th type of energy in the process of mixed material production account for K ci ; In step 6, the K a1 , K a2 , K a3 , K b1 , K b2 , K b3 , K ci Obtained through the following process: K a1 =C A1 / Q K a2 =C A2 / Q K a3 =C A3 / Q K b1 =C B1 / Q K b2 =C B2 / Q K b3 =C B3 / Q K c1 =C C1 / Q K c2 =C C2 / Q K c3 =C C3 / Q ………… K ci =C Ci / Q。

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