Carbon emission simulation and data acquisition device and method for asphalt mixture transportation process

Abstract

This application belongs to the field of carbon emission analysis, and particularly relates to a carbon emission simulation and acquisition device and method for asphalt mixture transportation. The carbon emission simulation and acquisition device for asphalt mixture transportation consists of a cubic container, a vibrating base, a dynamic electronic scale, a sensor fixing grid, a gas testing sensor, a mixture temperature sensor, an ambient temperature sensor, a fiber cloth, and an air circulation fan. This invention can accurately simulate the carbon emission coupling environment such as bumps, wind, and temperature changes during asphalt mixture transportation, and comprehensively test and characterize the carbon emission behavior of asphalt mixtures. It can be used to simulate and evaluate the carbon emission behavior and patterns of different types of asphalt mixtures during vehicle transportation, and can realize the evaluation and prediction of the carbon emission behavior of asphalt mixtures during transportation, thereby providing relevant methods and basis for achieving dual carbon targets in highway engineering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon emission analysis, in particular to a carbon emission simulation and collection device and method for asphalt mixture transportation process. BACKGROUND

[0002] Asphalt pavement has obvious advantages in comfort, visual effect, and convenience of maintenance, and its proportion has become the main pavement type of highways in China compared with other grades of pavement. In the construction process of asphalt pavement, asphalt mixture needs to be compacted at a certain temperature, and heating asphalt, coarse and fine aggregates and other materials to a certain temperature will consume a large amount of fuel. The use of mechanical equipment in the process of mixture mixing, transportation and paving and rolling will produce a large amount of carbon dioxide. Asphalt pavement accounts for more than 90% of the national high-grade highways, and energy shortage and environmental pollution are paid more and more attention. Different aspects promote us to carry out energy saving and emission reduction research.

[0003] At present, the research on carbon emissions of asphalt pavement construction mostly uses the quota method to calculate the total carbon emissions of the entire asphalt pavement construction period. However, there is still a certain error in the calculation of carbon emissions of the asphalt pavement construction process using the quota method compared with the actual measurement value. Therefore, the method for calculating the carbon emissions of the asphalt pavement construction process based on the actual measurement value has important theoretical significance and practical value. Based on this, the present application provides a carbon emission simulation and collection device and method for asphalt mixture transportation process, which is used for obtaining carbon emission data of asphalt mixture transportation process and evaluating carbon emission behavior in the transportation process. SUMMARY

[0004] The present application provides a carbon emission simulation and collection device and method for asphalt mixture transportation process, which is used for simulating and evaluating carbon emission behavior and rules of different types of asphalt mixture in vehicle transportation process, can realize the evaluation and prediction of carbon emission behavior of asphalt mixture in the transportation process, and further provides related methods and basis for realizing double carbon target of highway engineering.

[0005] Therefore, according to one aspect of the present application, a carbon emission simulation and collection device for asphalt mixture transportation process is provided, which comprises a cubic container, a vibrating base, a dynamic electronic scale, a sensor fixing grid, a gas test sensor, a mixture temperature sensor, an environmental temperature sensor, a fiber cloth and an air circulation fan.

[0006] The dynamic electronic scale is arranged on the vibration base, the cubic container is arranged on the dynamic electronic scale, the top of the cubic container is open, the interior of the cubic container is divided into upper and lower portions, the lower portion is used for containing the asphalt mixture, the sensor fixing grid is arranged on the upper portion of the interior of the cubic container, and the gas test sensors are arranged on the sensor fixing grid; the mixture temperature sensor is arranged on the lower portion of the interior of the cubic container, and is used for monitoring the temperature change of the asphalt mixture; the environmental temperature sensor is arranged on the upper portion of the interior of the cubic container, and is used for monitoring the temperature change of the environment; the fiber cloth is arranged on the top of the cubic container, and is used for heat preservation of the asphalt mixture; and the air circulation fan is arranged on one side of the top of the cubic container, and is used for simulating the influence of external wind on the running vehicle.

[0007] According to another aspect of the present application, a method for simulating and collecting carbon emissions during asphalt mixture transportation is provided, which uses the device for simulating and collecting carbon emissions during asphalt mixture transportation as described above, and comprises the following steps:

[0008] S1. Mixing and loading of the asphalt mixture: the asphalt mixture is mixed according to the Highway Asphalt Pavement Construction Technical Specification, and the mixing quality of the asphalt mixture is 10 kg-20 kg; the asphalt mixture is loaded into the cubic container by using the method of layered filling, the asphalt mixture is inserted and tamped by using a steel drill after each layer is filled, so as to ensure the uniformity of the asphalt mixture loading, the data of the dynamic electronic scale is observed at any time during the loading process, so as to ensure that the quality of the loaded asphalt mixture is within the range of 10 kg-20 kg, and the actual quality of the loaded asphalt mixture is recorded after the loading is completed;

[0009] S2. Arrangement of the test sensors and related auxiliary devices: during the loading of the asphalt mixture, the mixture temperature sensor is ensured to be in direct contact with the asphalt mixture, and the contact position is avoided to be in the gap during the loading process; after the loading is completed, the sensor fixing grid is installed at a position 15 cm-20 cm above the asphalt mixture, then the gas test sensors are uniformly arranged on the sensor fixing grid, the number of the gas test sensors is 9-30, and finally the environmental temperature sensor is installed;

[0010] S3. Semi-closed processing of the test environment and opening and running of the test device: the fiber cloth is covered on the top opening of the cubic container, the fiber cloth is fixed around, the middle portion of the fiber cloth is ensured not to be recessed into the interior of the cubic container, the mixture temperature sensor and the environmental temperature sensor are pre-operated, and it is ensured that the data can be accurately and stably acquired;

[0011] S4. Setting and opening of the vibration base and air circulation fan: turn on the vibration base, and at the same time, turn on the air circulation fan, the vibration direction of the vibration base adopts front-back and up-down vibration modes, simulates the motion state of the asphalt mixture during vehicle braking and jolting, the vibration frequency is 2700 times / min, and the amplitude is 0.5 mm-1.2 mm;

[0012] S5. Recording and acquisition of test data: record the relevant test data every 5 min-10 min, the test time range is 90 min-180 min, the test is ended after the preset test time is reached, three parallel tests are performed, and the average value of the results of the three parallel tests is taken.

[0013] The asphalt mixture transportation process carbon emission simulation collection device and method provided by the application have the beneficial effects that, compared with the prior art, the asphalt mixture transportation process carbon emission simulation collection device is composed of a cubic container, a vibration base, a dynamic electronic scale, a sensor fixing grid, a gas test sensor, a mixture temperature sensor, an environmental temperature sensor, a fiber cloth and an air circulation fan, the asphalt mixture transportation process carbon emission simulation collection method mainly includes mixing and packing of the asphalt mixture, arrangement of test sensors and related auxiliary devices, semi-closed processing of a test environment and opening and operation of a test device, setting and opening of the vibration base and the air circulation fan, and recording and acquisition of test data. The application can accurately simulate the jolting, wind and temperature change and other carbon emission coupling environments in the asphalt mixture transportation process, comprehensively test and characterize the carbon emission behavior of the asphalt mixture, can be used for simulating and evaluating the carbon emission behavior and rules of different types of asphalt mixtures in the vehicle transportation process, can realize evaluation and prediction of the carbon emission behavior of the asphalt mixture in the transportation process, and further provides related methods and bases for realizing the double-carbon target of highway engineering. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Among them:

[0016] Figure 1 is a longitudinal sectional structure schematic view of the asphalt mixture transportation process carbon emission simulation collection device shown in the embodiment of the application;

[0017] Figure 2 is Figure 1 the top view of the asphalt mixture transportation process carbon emission simulation collection device shown in the embodiment of the application;

[0018] Figure 3 is a P-T curve diagram of test results of the present application;

[0019] Figure 4 is a P-T curve diagram of test results of an embodiment of the present application.

[0020] Main component symbol explanation:

[0021] 1, cubic container; 2, vibration base; 3, dynamic electronic scale; 4, sensor fixing grid; 5, gas test sensor; 6, mixed material temperature sensor; 7, ambient temperature sensor; 8, fiber cloth; 9, air circulation fan. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. In the drawings, preferred embodiments of the present application are shown. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0027] As described in the background, at present, the research on carbon emissions of asphalt pavement construction mostly uses the quota method to calculate the total carbon emissions of the entire asphalt pavement construction period. However, there is still a certain error in the calculation of carbon emissions of the asphalt pavement construction process using the quota method compared with the actual measurement value. Therefore, the method for calculating the carbon emissions of the asphalt pavement construction process based on the actual measurement value has important theoretical significance and practical value.

[0028] In order to solve the above problems, the embodiment of the application provides a kind of asphalt mixture transportation process carbon emission simulation acquisition device, as shown in Figure 1 And Figure 2 As shown, the asphalt mixture transportation process carbon emission simulation acquisition device includes cubic container 1, vibration base 2, dynamic electronic scale 3, sensor fixed grid 4, gas test sensor 5, mixture temperature sensor 6, environmental temperature sensor 7, fiber cloth 8 and air circulation fan 9.

[0029] The dynamic electronic scale 3 is arranged on the vibration base 2, and the cubic container 1 is arranged on the dynamic electronic scale 3. The top of the cubic container 1 is open, and the interior of the cubic container 1 is divided into two parts, the lower part is used to contain asphalt mixture, the sensor fixed grid 4 is arranged on the upper part of the interior of the cubic container 1, and the gas test sensor 5 is arranged on the sensor fixed grid 4. The mixture temperature sensor 6 is arranged in the lower part of the interior of the cubic container 1, which is used to monitor the temperature change of the asphalt mixture; the environmental temperature sensor 7 is arranged in the upper part of the interior of the cubic container 1, which is used to monitor the temperature change of the environment; the fiber cloth 8 is covered on the top of the cubic container 1, which is used for heat preservation of asphalt mixture; the air circulation fan 9 is arranged on one side of the top of the cubic container 1, which is used to simulate the influence of external wind during the driving process of the transport vehicle.

[0030] In the embodiment of the present application, the asphalt mixture transportation process carbon emission simulation collection device is composed of a cubic container 1, a vibrating base 2, a dynamic electronic scale 3, a sensor fixing grid 4, a gas test sensor 5, a mixture temperature sensor 6, an environmental temperature sensor 7, a fiber cloth 8, and an air circulation fan 9, etc., which can accurately simulate the bumping, wind and temperature change and other carbon emission coupling environments in the asphalt mixture transportation process, comprehensively test and characterize the carbon emission behavior of the asphalt mixture, and can be used to simulate and evaluate the carbon emission behavior and rules of different types of asphalt mixtures in the vehicle transportation process, so as to realize the evaluation and prediction of the carbon emission behavior of the asphalt mixture in the transportation process, and further provide relevant methods and basis for realizing the double carbon target of highway engineering.

[0031] The cubic container 1 is a steel cubic container 1 made of low-alloy hot-rolled steel plate, wherein the low-alloy hot-rolled steel is Q345, and the alloy content is less than 3.5%. Thus, the steel material of the automobile loading hopper is simulated. The cubic container 1 can be fixed on the vibrating base 2 by a side clamping device.

[0032] The vibrating base 2 is a concrete vibrating table with a size of 800mm 800mm, a vibration frequency of 2700 times / min, and an amplitude of 0.5mm-1.2mm, which simulates the motion state of the asphalt mixture when the vehicle brakes and bounces.

[0033] The dynamic electronic scale 3 is a frameless electronic platform scale with a platform size of 800mm 800mm, a maximum weighing capacity of 300kg, a division scale of 0.1kg, and a test accuracy of 0.1g. The frameless electronic platform scale and the platform of the vibrating base 2 are fixed by cementing material.

[0034] The sensor fixing grid 4 is a plastic grid, a polypropylene (PP) or polyethylene (PE) glass fiber grid, which is used to fix the test gas sensor. The gas test sensor 5 is a diffusion type gas sensor, which is used for detection of CO x , NO x and PM 2.5&10 .

[0035] The mixture temperature sensor 6 and the environmental temperature sensor 7 are both thermocouple sensors with a test range of 0℃-200℃ and a test accuracy of 0.01℃.

[0036] The present application also provides an asphalt mixture transportation process carbon emission simulation collection method, which adopts the asphalt mixture transportation process carbon emission simulation collection device in the above embodiment. The asphalt mixture transportation process carbon emission simulation collection method comprises the following steps:

[0037] S1. Mixing and packing of asphalt mixture: The asphalt mixture is mixed according to the Technical Specification for Construction of Highway Asphalt Pavement (JTG F40-2019), and the mixing quality of the asphalt mixture is 10 kg-20 kg. According to the evaluation needs, matrix asphalt and modified asphalt and other binder materials can be selected, and aggregate such as basalt and diabase can be selected as the commonly used aggregate, and filler such as mineral powder, cement or fly ash can be selected, and all raw materials used shall meet the technical index requirements of the Technical Specification for Construction of Highway Asphalt Pavement (JTG F40-2019).

[0038] The asphalt mixture is packed into the cubic container 1 by layering, and a steel drill is used to insert and trowel the asphalt mixture after each layer is packed, to ensure the uniformity of the packing of the asphalt mixture. The data of the dynamic electronic scale 3 is observed at any time during the packing process to ensure that the quality of the packed asphalt mixture is within the range of 10 kg-20 kg. After the packing is completed, the actual quality of the packed asphalt mixture is recorded.

[0039] S2. Layout of test sensors and related auxiliary devices: During the packing of the asphalt mixture, ensure that the mixture temperature sensor 6 is in direct contact with the asphalt mixture, and avoid contact with the void position during the packing process. After the packing is completed, install the sensor fixing grid 4 at a distance of 15 cm-20 cm above the asphalt mixture, then evenly arrange the gas test sensor 5 on the sensor fixing grid 4, with a number of 9-30, and finally install the environmental temperature sensor 7.

[0040] S3. Semi-closed processing of the test environment and opening and running of the test device: Cover the fiber cloth 8 on the top opening of the cubic container 1, fix the fiber cloth 8 around, and ensure that the middle part of the fiber cloth 8 does not sag into the interior of the cubic container 1. Pre-run the mixture temperature sensor 6 and the environmental temperature sensor 7 to ensure accurate and stable data acquisition.

[0041] S4. Setting and opening of the vibration base 2 and the air circulation fan 9: Turn on the vibration base 2 and simultaneously turn on the air circulation fan 9. The vibration direction of the vibration base 2 uses front and back and up and down vibration modes to simulate the movement state of the asphalt mixture during vehicle braking and jolting. The vibration frequency is 2700 times / min, and the amplitude is 0.5 mm-1.2 mm.

[0042] S5. Recording and acquisition of test data: Record the relevant test data every 5 min-10 min, and the test time range is 90 min-180 min, which can be selected according to the asphalt mixture temperature (the asphalt mixture temperature decreases to 90℃). End the test after reaching the preset test time, conduct 3 parallel tests, and take the average value of the results of the 3 parallel tests.

[0043] The evaluation process of data obtained by the asphalt mixture transportation process carbon emission simulation collection device is as follows:

[0044] (1) Drawing of carbon emission curve;

[0045] (2) Carbon emission evaluation index;

[0046] (3) Analysis, calculation and evaluation of carbon emission index.

[0047] The following are specifically explained:

[0048] (1). Based on the test data obtained in step S5, collect the test time T and the corresponding emission gas concentration P, as shown in Figure 3 Draw the test result curve P-T with test time T as X axis and emission gas concentration P as Y axis, and divide the test curve change interval into three stages: initial change stage, rapid change stage and stable change stage. The determination basis of the critical point between the initial change stage and the rapid change stage is:

[0049] △P1=P1-P0≥0.05(P3-P0)

[0050] Wherein, △P1 is the difference value between the emission gas concentration value P1 of the first point on the curve and the emission gas concentration value P0 of the starting point of the curve, and P3 is the emission gas concentration value of the terminal point of the curve;

[0051] The determination basis of the critical point between the rapid change stage and the stable change stage is:

[0052] △P2=P3-P2≤0.05(P3-P0)

[0053] Wherein, △P2 is the difference value between the emission gas concentration value P3 of the terminal point of the curve and the emission gas concentration value P2 of the second point on the curve, and P3 is the emission gas concentration value of the terminal point of the curve;

[0054] P1 corresponds to the test time T1, P2 corresponds to the test time T2, and P3 corresponds to the test time T3. The curve can be divided into initial change stage, rapid change stage and stable change stage by the critical points P1 and P2.

[0055] (2). The carbon emission evaluation index is mainly as follows:

[0056] (2.1) Carbon emission standard value W

[0057] Based on the test result curve P-T, the carbon emission standard value W is calculated by the following formula:

[0058] W=P max / P x

[0059] wherein P max is the maximum value of the concentration of the exhaust gas during the test, P x is the concentration of the exhaust gas at the intersection X between the line connecting the first point and the second point on the curve and the P-T curve;

[0060] The greater the carbon emission standard value W, the faster the carbon emission speed and the higher the emission concentration; conversely, the smaller the W, the slower the carbon emission speed and the lower the emission concentration.

[0061] (2.2) Change phase reference value S

[0062] The change phase reference value S is used to evaluate the change of the gas concentration in different carbon emission change phases, and includes the initial phase reference value S 初始 , the rapid change phase reference value S 快速 and the stable change phase reference value S 稳定 , and the calculation formula is as follows:

[0063] S 初始 = (P1T1+P0T1) / 2

[0064] S 快速 = [(P2+P1)×(T2-T1)] / 2

[0065] S 稳定 = [(P3+P2)×(T3-T2)] / 2

[0066] wherein P0 is the concentration of the exhaust gas at the starting point of the curve, P1 is the concentration of the exhaust gas at the first point on the curve, P2 is the concentration of the exhaust gas at the second point on the curve, P3 is the concentration of the exhaust gas at the end point of the curve, T1 is the test time corresponding to the P1 concentration value, T2 is the test time corresponding to the P2 concentration value, and T3 is the test time corresponding to the P3 concentration value;

[0067] For the initial change phase, the greater the change phase reference value S 初始 , the higher the basic carbon emission and the lower the carbon emission concentration change rate; the smaller the change phase reference value S 初始 , the lower the basic carbon emission and the faster the carbon emission concentration change rate, i.e. after a short period of maintaining a low basic carbon emission level, the rapid change phase is entered immediately;

[0068] For the rapid change phase, the greater the change phase reference value S 快速 , the faster the carbon emission and the longer the time of maintaining the growth change phase; conversely, the relatively stable carbon emission growth and the shorter duration are indicated;

[0069] For the stable change phase, the greater the change phase reference value S 稳定The greater, the more stable the overall carbon emission, the relatively short stable change stage and the relatively gentle and stable emission; otherwise, the relatively high carbon emission rate, the relatively short stable change stage.

[0070] In a specific embodiment, the application method and process of the carbon emission simulation collection device in the asphalt mixture transportation process are as follows:

[0071] Step (1): mixing and packing of asphalt mixture;

[0072] Step (2): arrangement of test sensors and related auxiliary devices;

[0073] Step (3): semi-closed processing of test environment and opening operation of test device;

[0074] Step (4): setting and opening of vibrating base 2 and air circulation fan 9;

[0075] Step (5): recording and obtaining of test data.

[0076] The application method and process of the carbon emission simulation collection device in the asphalt mixture transportation process, characterized in that, step (1) mixing and packing of asphalt mixture, the asphalt mixture mixing quality is 15 kg according to the Technical Specification for Construction of Highway Asphalt Pavement (JTG F40-2019). According to the evaluation needs, SBS modified asphalt can be selected as the binder material, aggregate selection basalt, filler limestone powder, asphalt mixture gradation AC-13, the optimum asphalt content is 4.6%, all raw materials meet the technical index requirements of the Technical Specification for Construction of Highway Asphalt Pavement (JTG F40-2019).

[0077] The key points of asphalt mixture packing are: using the method of layered filling to pack the asphalt mixture into the cubic container 1, using steel drill to insert and stir the asphalt mixture after each layer filling to ensure the uniformity of the asphalt mixture packing. After packing, the actual quality of the asphalt mixture is 15.2 kg.

[0078] The key points of step (2) arrangement of test sensors and related auxiliary devices are: during the packing process of the asphalt mixture, ensure that the mixture temperature sensor 6 is in direct contact with the asphalt mixture, avoid contact in the gap position during the packing process; after packing, install the sensor fixed grid 4 at a position 20 cm above the asphalt mixture, then arrange the gas test sensor 5 radially and interval on the sensor fixed grid 4, the number of arrangement is 16, finally install the environmental temperature sensor 7, connect the sensor data reading device with the sensor, and place the reading device in the external reserved area of the cubic container 1.

[0079] The step (3) of semi-closed processing of the test environment and opening operation of the test device is specifically as follows: the fiber cloth 8 is covered on the top opening of the cubic container 1, the fiber cloth 8 is fixed around, and the middle part is ensured not to be recessed into the cubic container 1; the test sensor and the reading device are pre-operated to ensure that the data can be accurately and stably acquired.

[0080] The step (4) of setting and opening of the vibration base 2 and the air circulation fan 9 is specifically as follows: the cubic container 1 is fixed to the vibration base 2 by using the side clamps, then the vibration base 2 is opened, and the air circulation fan 9 is opened at the same time, so that the gas distribution uniformity and the accuracy of the sensor test result are ensured. The vibration direction adopts front-back and up-down vibration modes, the vibration frequency is 2700 times / min, and the amplitude is 1.2 mm, so that the motion state of the asphalt mixture during vehicle braking and bumping is simulated.

[0081] The step (5) of recording and acquiring of the test data is specifically as follows: the related test data is recorded every 10 min, and the test is ended after the preset test time is reached. The test time range is 120 min. For the evaluation object, three parallel tests should be carried out, and the average value of the three parallel test results is taken. The example selects NO x The average value of the experimental test results of the test object is shown in Table 1.

[0082] Table 1 Average value data of asphalt mixture emission test results

[0083]

[0084] The asphalt mixture transportation process carbon emission simulation collection device and the application evaluation method disclosed by the application are related to the evaluation process of data acquired by the asphalt mixture transportation process carbon emission simulation collection device, and the evaluation process is specifically as follows:

[0085] (1) Drawing of carbon emission curve

[0086] The evaluation of the data acquired by the asphalt mixture transportation process carbon emission simulation collection device is characterized in that the drawing method of the carbon emission curve mainly includes the following steps: collecting test time T and corresponding emission gas concentration P, taking the test time T as the X axis and the emission gas concentration P as the Y axis, and drawing a test result curve P-T. The test curve change interval is divided into three stages: an initial change stage, a rapid change stage and a stable change stage. The drawn carbon emission curve and characteristic points are as shown in Figure 4 .

[0087] The characteristic point information calculation result mainly includes the following:

[0088] P0=0.012 mg / m 3 , P1=0.0153 mg / m 3P2 = 0.0747 mg / m 3 P3 = 0.078 mg / m 3 P x =0.0508mg / m 3 P max =0.078mg / m 3 .

[0089] T1=26.6min, T2=89.25min, T3=120min, T x = 64min.

[0090] (2) Calculation results of carbon emission assessment indicators

[0091] The evaluation of data acquired by the carbon emission simulation and acquisition device during the transportation of asphalt mixtures is characterized by the following main carbon emission evaluation indicators:

[0092] ① Carbon emission standard value W

[0093] The calculation results for the carbon emission standard value W are as follows:

[0094] W=P max / P x = / =0.078 / 0.0508=1.535

[0095] ② Reference value S during the change phase

[0096] The reference value S for different stages of carbon emission change is used to evaluate the changes in gas concentrations at different stages of carbon emission change, including the reference value S for the initial stage. 初始 Reference value S during the rapid change phase 快速 and reference value S during the stable change phase 稳定 The specific calculation formula is as follows:

[0097] S 初始 =(P1T1+P0T1) / 2=(0.0153×26.6+0.012×26.6) / 2=0.363mg / m 3 ·min

[0098] S 快速 =[(P2+P1)×(T2-T1)] / 2=[(0.0747+0.0153)×(89.25-26.6)] / 2=2.82mg / m 3 ·min

[0099] S 稳定 =[(P3+P2)×(T3-T2)] / 2=[(0.078+0.0747)×(120-89.25)] / 2=2.35mg / m 3 ·min

[0100] The value calculated from the carbon emission standard value W shows that the carbon emission speed of the SBS modified asphalt mixture of the embodiment is relatively fast, and the emission concentration is high; and for the three change stages, on the contrary, the smaller the W is, the slower the carbon emission speed is, and the lower the emission concentration is. The change stage reference value S of the initial change stage 初始 is relatively small, indicating that the basic carbon emission is low, and the initial change stage maintenance time is relatively short; for the rapid change stage, the change stage reference value S 快速 is the largest among the three change stages, indicating that the carbon emission continues to increase rapidly, and the growth change stage maintenance time is relatively long; the change stage reference value S of the stable change stage 稳定 is slightly smaller than that of the rapid change stage, and the carbon emission can maintain a relatively long stable stage after reaching the maximum value, that is, the subsequent change is relatively small.

[0101] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present disclosure.

[0102] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An asphalt mixture transportation process carbon emission simulation acquisition device, characterized in that, The device comprises a cubic container, a vibrating base, a dynamic electronic scale, a sensor fixing grid, a gas testing sensor, a mixture temperature sensor, an ambient temperature sensor, a fiber cloth and an air circulation fan. The dynamic electronic scale is arranged on the vibrating base, the cubic container is arranged on the dynamic electronic scale, the top of the cubic container is open, the interior of the cubic container is divided into two parts, the lower part is used for containing asphalt mixture, the sensor fixing grid is arranged on the upper part of the interior of the cubic container, and the gas testing sensor is arranged on the sensor fixing grid.

2. The asphalt mixture transportation process carbon emission simulation acquisition device according to claim 1, wherein: The vibrating base is a concrete vibrating table with a size of 800 mm 800 mm, a vibration frequency of 2700 times / min, and an amplitude of 0.5 mm-1.2 mm; The dynamic electronic scale is a frameless electronic platform scale, with a platform size of 800 mm 800 mm, maximum weighing mass 300 kg, division scale 0.1 kg, test precision 0.1 g, and the platform of the frameless electronic platform scale and the vibration base are fixed by cementing material.

3. The asphalt mixture transportation process carbon emission simulation collection device according to claim 1, characterized in that, The gas test sensor is a diffusion type gas sensor for detecting CO x , NO x , and PM 2.5&10 .

4. The asphalt mixture transportation process carbon emission simulation collection device according to claim 1, characterized in that, The mixture temperature sensor and the ambient temperature sensor are both thermocouple sensors, the test range is 0-200 DEG C, and the test precision is 0.01 DEG C.

5. The asphalt mixture transportation process carbon emission simulation acquisition apparatus according to claim 1, characterized in that, The fiber cloth is a glass fiber silica gel cloth, and the thickness is 2-3 mm.

6. The asphalt mixture transportation process carbon emission simulation collection device according to claim 1, characterized in that, The air circulation fan has a wind speed range of 8-10 m / s.

7. A method for collecting carbon emissions from asphalt mixture transportation process simulation, characterized in that, The asphalt mixture transportation process carbon emission simulation acquisition method comprises the following steps: S1. Mixing and loading of asphalt mixture: the asphalt mixture is mixed according to the Highway Asphalt Pavement Construction Technical Specification, and the mixing quality of the asphalt mixture is 10-20 kg; the asphalt mixture is loaded into the cubic container by using the method of layered filling, the asphalt mixture is inserted and tamped by using a steel drill after each layer is filled, the uniformity of the asphalt mixture is ensured, the data of the dynamic electronic scale is observed at any time during the loading process, the quality of the loaded asphalt mixture is ensured to be within the range of 10-20 kg, and the actual quality of the loaded asphalt mixture is recorded after the loading is completed; S2. Arrangement of testing sensors and related auxiliary devices: during the loading of the asphalt mixture, the mixture temperature sensor is ensured to be in direct contact with the asphalt mixture, and the contact position is avoided to be in a gap during the loading process; after the loading is completed, the sensor fixing grid is installed at a position 15-20 cm above the asphalt mixture, then the gas testing sensor is uniformly arranged on the sensor fixing grid, the number of the gas testing sensor is 9-30, and finally the ambient temperature sensor is installed. S3. Semi-closed processing of the test environment and open operation of the test device: cover the fiber cloth at the top opening of the cubic container, fix the fiber cloth around, ensure that the middle part of the fiber cloth does not sag into the interior of the cubic container; pre-operate the mixture temperature sensor and the environment temperature sensor to ensure that the data can be accurately and stably obtained; S4. Setting and opening of the vibration base and the air circulation fan: turn on the vibration base and at the same time turn on the air circulation fan, the vibration direction of the vibration base adopts front and back and up and down two vibration modes, simulates the motion state of asphalt mixture when the vehicle brakes and bounces, the vibration frequency is 2700 times / min, and the amplitude is 0.5 mm-1.2 mm; S5. Recording and obtaining of test data: record the relevant test data every 5-10 min, the test time range is 90-180 min, the test is ended after reaching the preset test time, and three parallel tests are carried out, and the average value of the results of the three parallel tests is taken.

8. The method of claim 7, wherein, Based on the test data obtained in step S5, collect the test time T and the corresponding exhaust gas concentration P, take the test time T as the X axis and the exhaust gas concentration P as the Y axis, draw the test result curve P-T, and divide the test curve change interval into three stages: initial change stage, rapid change stage and stable change stage. The judgment basis of the critical point between the initial change stage and the rapid change stage is: △P1=P1-P0≥0.05(P3-P0); Wherein, △P1 is the difference between the exhaust gas concentration value P1 of the first point on the curve and the exhaust gas concentration value P0 of the starting point of the curve, and P3 is the exhaust gas concentration value at the end point of the curve; The judgment basis of the critical point between the rapid change stage and the stable change stage is: △P2=P3-P2≤0.05(P3-P0); Wherein, △P2 is the difference between the exhaust gas concentration value P3 at the end point of the curve and the exhaust gas concentration value P2 at the second point on the curve, and P3 is the exhaust gas concentration value at the end point of the curve; P1 corresponds to the test time T1, P2 corresponds to the test time T2, and P3 corresponds to the test time T3. The critical points P1 and P2 can divide the curve into three change stages: initial change stage, rapid change stage and stable change stage.

9. The method of claim 8, wherein, Based on the test result curve P-T, the carbon emission standard value W is calculated by the following formula: W = P max / P x； wherein P max is the maximum value of the concentration of the exhaust gas during the test, P x is the concentration of the exhaust gas at the intersection X between the line connecting the first and second points on the curve and the P-T curve. The greater the carbon emission standard value W, the faster the carbon emission speed and the higher the emission concentration; on the contrary, the smaller the W, the slower the carbon emission speed and the lower the emission concentration.

10. The method of claim 8, wherein, Based on the test result curve P-T, a change stage reference value S is calculated, which is used to evaluate the gas concentration change in different carbon emission change stages, including an initial stage reference value S 初始 , a rapid change stage reference value S 快速 , and a stable change stage reference value S 稳定 , and the calculation formula is as follows: S 初始 = (P1T1 + P0T1) / 2; S 快速 = [(P2+P1) x (T2-T1)] / 2; S 稳定 = [(P3+P2) x (T3-T2)] / 2; Wherein, P0 is the exhaust gas concentration value at the starting point of the curve, P1 is the exhaust gas concentration value at the first point on the curve, P2 is the exhaust gas concentration value at the second point on the curve, P3 is the exhaust gas concentration value at the end point of the curve, T1 is the test time corresponding to the concentration value P1, T2 is the test time corresponding to the concentration value P2, and T3 is the test time corresponding to the concentration value P3. For the initial change phase, the change phase reference value S 初始 The greater, the higher the basic carbon emission, and the relatively lower the change rate of carbon emission concentration; the change phase reference value S 初始 The smaller, the lower the basic carbon emission, and the relatively faster the change rate of carbon emission concentration, that is, after maintaining a low basic carbon emission level for a short time, it immediately enters the rapid change phase; For the rapid change phase, the change phase reference value S 快速 The greater, the more rapid the continuous increase in carbon emissions, and the longer the duration of the growth change phase; For stable change phase, change phase reference value S 稳定 The greater, the more stable the overall carbon emissions, the relatively short stable change phase, and the relatively flat and stable emissions; on the contrary, the carbon emission rate is relatively high, and the stable change phase is relatively short.

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