CN109614575A - Method for measuring and calculating CO self-discharged by asphalt mixture on construction site2Is calculated by - Google Patents
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- 239000010426 asphalt Substances 0.000 title claims abstract description 228
- 238000010276 construction Methods 0.000 title claims abstract description 80
- 239000000203 mixture Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 238000004364 calculation method Methods 0.000 claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 64
- 238000012360 testing method Methods 0.000 claims description 42
- 230000008569 process Effects 0.000 claims description 30
- 239000011800 void material Substances 0.000 claims description 22
- 230000008020 evaporation Effects 0.000 claims description 19
- 238000001704 evaporation Methods 0.000 claims description 19
- 239000002344 surface layer Substances 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 13
- 238000009490 roller compaction Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 4
- 238000013139 quantization Methods 0.000 claims description 3
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 12
- 230000009467 reduction Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 125
- 230000008521 reorganization Effects 0.000 description 21
- 239000000463 material Substances 0.000 description 10
- 239000000779 smoke Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 239000005431 greenhouse gas Substances 0.000 description 4
- 238000011835 investigation Methods 0.000 description 4
- 241000935974 Paralichthys dentatus Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The invention discloses a method for measuring and calculating CO self-discharged by asphalt mixture on construction site2The method relates to the paving and rolling links of a construction site, and comprises the following steps: quantitative CO emission of asphalt mixture by selecting paving and rolling links2The calculation parameters required for the gas; on-site obtaining and calculating CO self-discharged by asphalt mixture2The specific data required; CO self-discharged by each ton of asphalt mixture in the links of paving and rolling2Calculation model and asphalt mixture emission CO2A calculation model of the total amount; substituting the data parameters into the calculation model to obtain the CO self-discharged by the asphalt mixture2The amount of (c). The calculation method established by the invention has the characteristics of high universality, simplicity, convenience and practicability, and under the era background of low carbon emission reduction, the calculation method provided by the invention realizes the emission of CO to the asphalt mixture of a specific project on a construction site2The quantitative calculation of the method has important significance for developing low-carbon emission reduction strategy research and building green environment-friendly asphalt pavements.
Description
Technical field
The invention belongs to highway engineering construction energy-conserving and emission-cutting technology fields, and in particular to a kind of measuring and calculating construction site pitch is mixed
Close material itself discharge CO2Calculation method.
Background technique
Since the industrial revolution, with CO2Based on greenhouse gases it is a large amount of discharge constantly aggravate global warming issue, by
Phenomena such as this such as the two poles of the earth Melting Glaciers caused, extreme weather take place frequently has seriously threatened the sustainable development of human society
Exhibition；And be affected by human factors that influences larger, to greenhouse effects are the most significant in various greenhouse gases and proportion most
Big gas is CO2, therefore, in the research of low-carbon emission reduction correlation theory and technical field, research and control CO2Discharge amount
As current problem in the urgent need to address.
In recent years, along with large-scale Transportation facilities build brought to people's production and life it is convenient
While, it also produces and cannot be neglected carbon emission problem, according to Intergovernmental Panel on Climate Change in 1970~2004 years
Statistical data show that the greenhouse gas emissions of Transportation industry account for about the 13% of Global Emissions of Greenhouse Gas amount, it is contemplated that
11.08 hundred million tons are up to the year two thousand thirty.Important component of the bituminous pavement as China's reason traffic, due to relaxing for its driving
Adaptive and convenient for maintenance, vision is good the advantages that become main road surface form, according to statistics, bituminous pavement is in China's height
Accounting about 80% in grade road surface, at the same time, large-scale Bituminous Pavement Construction especially hot-mix asphalt mixture it is extensive
Using also bringing serious carbon emission problem.
Asphalt needs higher temperature in the construction process, can also discharge while consuming mass energy corresponding
CO2Gas, and asphalt itself can also discharge a large amount of glance coals under high temperature environment, it is comprehensive using ZR-3200 type flue gas
It closes when analyzer is detected and finds the CO containing higher concentration in glance coal2Gas.Currently, both at home and abroad about asphalt
Discharge CO2The quantitative research of gas is less, and existing calculation method is mainly for asphalt because of machine during production and construction
Tool equipment consumes the energy and discharges CO2The quantitative research of isothermal chamber gas, have ignored asphalt under high temperature environment itself
Also a large amount of CO can be discharged2Gas still lacks in existing research and discharges CO for construction site asphalt itself2Gas
Easy, accurate calculation method cannot reflect that the carbon emission of current asphalt is horizontal, be unfavorable for targetedly carrying out drip
The low-carbon emission reduction countermeasure on green road surface.
Summary of the invention
The purpose of the present invention is to provide a kind of measuring and calculating construction site asphalts itself to discharge CO2Calculation method,
With simplicity, it is precisely calculated itself discharge CO during asphalt is paved and rolled at the construction field (site)2Amount,
In order to solve the above technical problems, the present invention establish respectively asphalt pave and roller compaction processes itself row
Put CO2Computation model, establish on this basis measuring and calculating construction site asphalt itself discharge CO2The calculating mould of total amount
Type gives CO2The specific detection method and calculating step of gas.As pave in disparity items and roller compaction processes used in drip
The amount of green mixture there is some difference property has simplicity for the ease of the unification and the calculation method established of quantization unit
With universality, in research with asphalt per ton in the construction process produced by CO2Amount calculated, on this basis,
According to the asphalt dosage of detailed programs you can get it the project Asphalt Mixture itself discharge CO under high temperature environment2
Total amount, the specific technical solution of use is as follows:
A kind of measuring and calculating construction site asphalt itself discharges CO2Calculation method, comprising the following steps:
Step 1 determines that construction site paves and roller compaction processes asphalt itself discharges CO2Required calculating parameter
In conjunction with the paving of current asphalt, compaction technology and each process asphalt discharge CO2The characteristics of, respectively
Choose corresponding calculating parameter.
1. the selected calculating parameter needed for link that paves
In the link that paves, chooses paving site asphalt and discharge CO2CO in the volumetric concentration of gas, live atmosphere2's
Volumetric concentration, the link that paves CO2The calculating time, the link that paves CO2The evaporation rate of gas, the link that paves CO2The calculating of gas
Area, the spreading quality of asphalt, atmospheric temperature and pressure are as calculating parameter；
2. selecting calculating parameter needed for rolling link
Link is being rolled, the CO of on-site test is chosen in research2CO in volumetric concentration, live atmosphere2Volumetric concentration, roll
Link CO2The calculating time, roll link CO2The evaporation rate of gas rolls link CO2The reference area of gas, big temperature
Degree, atmospheric pressure roll the quality of link asphalt as calculating parameter；
Step 2, scene, which obtains, paves and rolls link asphalt discharge CO2The calculating parameter of gas
Link is paved and rolled to construction site using the ZR-3200 type smoke comprehensive analyzer with gas collector
CO in atmosphere2Void fraction and the CO of asphalt discharge2Void fraction is detected；It is red using fluke
The temperature of outside line handheld thermometer detection asphalt；By checking that item file and consulting item responsible person obtain construction
Mileage, width, thickness and the core boring sampling density in section；Using DYM3-03 digital temperature barometer measure field atmosphere
Temperature and air pressure；Measured respectively by stopwatch and tape measure asphalt from starting to detect to instrument display density value when
Between and gas by the path distance of detection device, CO is obtained with this2The evaporation rate of gas.
Step 3 establishes construction site and paves and roll link asphalt per ton itself discharge CO2Computation model
Link asphalt per ton itself the discharge CO 1. foundation paves2The computation model of gas
After the calculating parameter for determining the link that paves, link asphalt per ton itself discharge that paves is calculated according to the following formula
CO2Amount:
In formula, ECO2 (paves)CO is discharged for the link that paves asphalt per ton itself2The amount (g/t) of gas；ρm1To pave
Link CO2Mass concentration (the mg/m of gas3)；a1For paver width (m)；b1For the length (m) that paves；v1For CO2Gas is waved
It sends out speed (m/s)；t1For the link gas detection time (s) that paves；1000 reduced unit to convert milligram to gram；m1For booth
Spread the calculating quality (t) of link asphalt.
2. foundation rolls link asphalt per ton itself discharge CO2The computation model of gas
After determination rolls the calculating parameter of link, calculates roll link asphalt per ton itself discharge according to the following formula
CO2Amount:
In formula, ECO2 (is rolled)CO is discharged to roll link asphalt per ton itself2The amount (g/t) of gas；ρm2To roll
Link CO2Mass concentration (the mg/m of gas3)；a2For gas collector sample cover width (m)；b2It is adopted for gas collector
Sample cover length (m)；v2To roll link CO2Gas evaporation rate (m/s)；t2To roll the link gas detection time (s)；
1000 reduced unit to convert milligram to gram；m2For the calculating quality (t) for rolling link asphalt.
Step 4 establishes construction site asphalt per ton itself discharge CO2The computation model of amount
Link asphalt per ton itself discharge CO is paved and rolled obtaining2Computation model after, according to the following formula may be used
From which further follow that construction site asphalt per ton itself discharges CO2Computation model:
ECO2 (construction site)=ECO2 (paves)+ECO2 (is rolled) (3)
In formula, ECO2 (construction site)CO is discharged for construction site asphalt per ton itself2The amount (g/t) of gas；ECO2 (paves)
CO is discharged for the link that paves asphalt per ton itself2The amount (g/t) of gas；ECO2 (is rolled)To roll link pitch mixing per ton
Expect itself discharge CO2The amount (g/t) of gas；
Step 5 establishes detailed programs Asphalt Mixture itself discharge CO2The computation model of total amount
In clear construction site, asphalt per ton itself discharges CO2Computation model after, in conjunction with being dripped in detailed programs
The dosage of green mixture can obtain the CO that detailed programs Asphalt Mixture discharges at the construction field (site)2Total amount, CO2Total emission volumn is pressed
Following formula is calculated:
ECO2 (total amount)=ECO2 (construction site)·G(asphalt) (4)
In formula, ECO2 (total amount)CO is discharged for construction site detailed programs Asphalt Mixture itself2The total amount (g) of gas；
ECO2 (construction site)CO is discharged for construction site mixture per ton itself2The amount (g/t) of gas；G(asphalt)For the pitch of detailed programs
Mixture dosage (t).
Step 6, construction site in step 1 paves and rolled obtain in the carbon emission calculating parameter and step 2 of link
Data substitute into computation model (1), (2) respectively, can obtain respectively and pave and roll link asphalt per ton discharge CO2Gas
Calculated result is substituted into computation model (3), in (4) by the amount of body respectively later, can show that pitch is mixed in the detailed programs of construction site
Close material itself discharge CO2The total amount of gas.
Further, in the step one, that due to the detection of ZR-3200 type smoke comprehensive analyzer is CO2Gas
Volumetric concentration, and the discharge amount of gas is calculated with mass concentration, therefore, when carrying out carbon emission amount calculating, is needed
The volumetric concentration of gas is converted into mass concentration, conversion formula is such as shown in (5):
In formula, ρm(CO2)CO is discharged for asphalt itself2Mass concentration (the mg/m of gas3)；ρv1For asphalt
Middle CO2The volumetric concentration (ppm) of gas；ρvaFor CO in atmosphere2Volumetric concentration (ppm)；MCO2For CO2The average molecular matter of gas
Measure (CO244) relative molecular mass of gas is；t0For atmospheric temperature (DEG C)；Ba is atmospheric pressure (Pa).
In the present solution, carrying out CO in the asphalt to the link that paves2When void fraction detects, since edge paves
The quality of asphalt mixtures of machine width direction is uneven, asphalt Relatively centralized when paving in the middle part of spiral distributor, booth
The CO of paving machine both sides discharge2Void fraction therefore should be along paver screw material-distributing in detection process lower than the concentration at middle part
Device width direction is uniformly distributed 6 test points from left to right, and each test point position is located at the L/12 of paver width direction,
At L/4,5L/12,7L/12,9L/12,11L/12, each test point respectively takes 15 sample sizes, and with the sample standard deviation of each test point
Value is used as point CO2The calculated value of void fraction；Pass through computation model (5) later for the CO of each test point2Gas volume is dense
Degree is converted into mass concentration, then establishes the relationship of various point locations in the mass concentration and paver of gas, by paving
The data fitting of each test point, obtains the link CO that paves in journey2Quantization mould of the mass concentration of gas along paver width direction
Type, as shown in formula (6):
ρm1=A1L2+B1L+C1 (6)
In formula, ρm1For the link CO that paves2Mass concentration (the mg/m of gas3)；L is the test point position on paver；A1、
B1、C1The respectively coefficient of matched curve, it with test point position and detection sample refer both to it is related.
Further, in the step one, what it is due to this programme research is pitch per ton in construction process of asphalt pavement
The CO that mixture generates2Gas emissions obtain CO caused by the total asphalt of detailed programs with this2It measures, therefore, is
Convenient for studying the CO generated during bituminous mixture laying per ton2Gas and in view of ZR-3200 type smoke comprehensive analyze
Instrument detects CO2The frequency of Shi Jilu data be 10s it is primary, in bituminous mixture laying link, often paved with paver 1min when
A length of calculating time, length that the calculating quality of asphalt takes paver to advance per minute with along paver width direction
Asphalt, computation model is respectively as shown in formula (7), (8):
b1=va.t1 (7)
m1=ρ .a1.b1.h (8)
In formula, b1For the length (m) that paves；t1For the calculating time (s) for the link asphalt that paves；vaFor paver
Spreading speed (m/s)；m1Often pave for paver 1min when along paver width direction asphalt calculating quality (t)；ρ
For asphalt core boring sampling density (t/m3)；a1For single machine paving width (m)；H is the thickness (m) of bituminous mixture laying.
Further, in the scheme one, CO is being carried out to the asphalt for rolling link2Void fraction inspection
When survey, being carried out after paving due to rolling link, roller compaction process is related to first pressing, multiple pressure and the final pressure of asphalt,
Therefore, the calculating time t of link carbon emission is rolled2For since first pressing into asphalt CO2Gas concentration of emission and atmosphere
The time unanimously no longer changed；In addition, rolling the temperature of link asphalt and the volumetric concentration of discharge constantly drops at any time
It is low, the relational model for establishing gas concentration of emission and detection time is needed in research: the CO that will test first2Void fraction
It substitutes into computation model (5) and obtains CO2The mass concentration of gas, then by rolling link CO2Gaseous mass concentration and detection
The data of time are fitted, and show that the link asphalt itself discharges CO2The mass concentration of gas and detection time
Relational model, shown in computation model such as formula (9):
ρm2=A2t2+B2t+C2 (9)
In formula, ρm2To roll link CO2Mass concentration (the mg/m of gas3)；T is detection time (s)；A2、B2、C2Respectively
For the coefficient of matched curve, it with detection time and detection sample refer both to it is related.
Further, in the step one, what it is due to this programme research is drip per ton in asphalt work progress
The CO that green mixture generates2Gas emissions, therefore, for the ease of studying the CO generated in asphalt roller compaction process per ton2
Gas rolls link in asphalt, with the pitch mixing in ZR-3200 type smoke comprehensive analyzer sample cover areal extent
Material is calculating quality；The calculating quality of link asphalt is rolled by the length and width, surface thickness and drill core of sample cover
Sampling density determines, shown in computation model such as formula (10):
m2=ρ .a2.b2.h (10)
In formula, m2For the calculating quality (t) of asphalt in sample cover sample range；ρ is the close of road surface core boring sampling
Spend (t/m3)；a2For sample cover width (m)；b2For sample cover length (m)；H is the thickness (m) of surface layer.
Further, it in the step two, is found in research process, CO2The evaporation rate and asphalt of gas
Temperature have very strong correlation, pass through detection different temperatures under CO2The evaporation rate (being shown in Table 1) of gas, can be fitted and obtain
Shown in the relational model of asphalt gaseous volatilization speed and temperature such as formula (11):
CO in 1 asphalt of table2The evaporation rate of gas and the relationship of asphalt temperature
V=-3 × 10-6T2+0.0021T+0.1337 (11)
In formula, v CO2The evaporation rate (m/s) of gas；T is the temperature (DEG C) of asphalt；
Further, in the step two, due to CO in asphalt2The evaporation rate of gas is related with temperature,
And the temperature of roller compaction process Asphalt Mixture is constantly reduced with the progress of detection time, it is therefore desirable to establish in roller compaction process and drip
The temperature of green mixture and the relational model of detection time roll CO in link asphalt with determination2The volatilization speed of gas
Degree；It is fitted by the data to the temperature and detection time that roll link asphalt, show that rolling link pitch mixes
The temperature of material and the relational model of detection time are closed, as a result as shown in formula (12):
T=A3t2+B3t+C3t (12)
In formula, T is the temperature (DEG C) for rolling link asphalt；T is detection time (s)；A3、B3、C3Respectively it is fitted
The coefficient of curve, it is related with the temperature of asphalt and detection time.
Further, in the step five, the dosage of detailed programs construction site asphalt by surface layer thickness,
Core boring sampling density, the length of pavement construction and width of roadway determine, shown in computation model such as formula (13):
G(asphalt)=ρ .a3.b3.h (13)
In formula, G(asphalt)For the dosage (t) of detailed programs asphalt；ρ is the density (t/ of road surface core boring sampling
m3)；a3For width of roadway (m)；b3For pavement construction length (m)；H is the thickness (m) of surface layer.
The invention has the benefit that the present invention is currently to advocate construction low-carbon environment-friendly green road both at home and abroad
Under background, itself CO is discharged at the construction field (site) about measuring and calculating asphalt for still lacking at present2The simplicity of gas, science
Calculation method proposes a kind of measuring and calculating construction site and paves and roll link asphalt itself discharge CO2Calculation method.
This method can be by paving and rolling ring for the computation model provided in the data substitution scheme of field investigation and detection to obtain
Save the CO of asphalt per ton itself discharge2The amount of gas, then in conjunction with the total of asphalt used in detailed programs
Measure total CO to obtain construction site asphalt itself discharge2Gas.
Importantly, considering the CO in detection process in atmosphere in the present invention2Gas is to measuring and calculating asphalt itself
Discharge CO2The influence of gas, therefore, by subtracting greatly the gas concentration of the asphalt of on-site test in calculating process
CO in gas2The concentration of gas calculates the CO of asphalt itself actual discharge2Gas；In addition, considering construction in this programme
The temperature change of process Asphalt Mixture is to CO2The influence of gaseous volatilization speed, calculated result can more embody asphalt
True carbon emission situation.
Detailed description of the invention
Fig. 1 is that a kind of measuring and calculating construction site asphalt itself of the invention discharges CO2The calculation method flow chart of gas.
Specific embodiment
CO is discharged with the asphalt of foundation itself below2Based on the computation model of gas, in conjunction with specific investigation
Detection data, table simultaneously discharge CO to construction site asphalt itself according to the calculation process in Fig. 12The calculating side of gas
Method is illustrated, and for the ease of the specific implementation process that the present invention will be described in detail, is put in embodiment with 104 reorganization and expansion 1 of national highway
It is introduced for surface layer.
A kind of measuring and calculating construction site asphalt itself of the present embodiment discharges CO2Calculation method, comprising the following steps:
Step 1: the link that paves asphalt per ton itself discharges CO2The calculating of gas
(1) acquisition of the link that paves calculating parameter
1. CO in on-site test atmosphere and asphalt2The volumetric concentration of gas
Paving site detects CO in local atmosphere using ZR-3200 type smoke comprehensive analyzer2The volumetric concentration of gas, beats
It opens instrument and measures CO in live atmosphere after stable reading2The volumetric concentration of gas is 381.6ppm；To the link pitch that paves
The CO of mixture discharge2When gas is detected, in detection process along paver screw material-distributing device width direction from left to right according to
Secondary to be uniformly arranged 6 test points, each test point respectively detects 15 sample sizes, using the mean value of each test point as the calculating of the point
Value.
104 reorganization and expansion 1 of national highway mark pavement spread width be 12m, scene using wear receive Parker F182CS type paver progress
Two-shipper connection paving, single machine paving width are 6m, and wherein 1 paver is detected for selection, on-site test asphalt itself row
The CO put2Void fraction is as shown in table 2.
Table 2 paves CO in link asphalt2Void fraction detected value
2. detecting the paving material of asphalt
Detecting instrument is moved forward with paver in paving process, and the temperature that asphalt detects is a steady state value,
The asphalt in 104 reorganization and expansion 1 of national highway mark paving process is detected using fluke infrared ray handheld thermometer,
The paving material for obtaining asphalt is 165 DEG C.
3. the measurement of atmospheric temperature and pressure
Paving site uses instrument using temperature and air pressure in DYM3-03 digital temperature barometer measurement atmosphere
Measuring temperature and pressure in local atmosphere is respectively 32 DEG C and 99840Pa.
4. CO in the link that paves asphalt2The evaporation rate of gas
The link asphalt temperature that paves of on-site test is 165 DEG C, is substituted into asphalt gaseous volatilization speed
Degree can obtain CO in the link asphalt that paves with the relational model (11) of temperature2The evaporation rate of gas: v1=-3 ×
10-6T2+ 0.0021T+0.1337=0.402m/s
5. determining the calculating quality for the link asphalt that paves and calculating the time
Bituminous pavement remains in paving process at the uniform velocity to pave, the uniform quality to pave, 104 reorganization and expansion 1 of national highway mark
The spreading speed of live paver is 2m/min, and the paving thickness of upper layer is 0.04m, and single machine paving width is 6m, and drill core takes
Sample density is 2.42 (t/m3), the above calculating parameter is substituted into computation model (7) and (8) respectively, then paver often paves 1min
Calculating quality are as follows: m1=ρ1.a1.b1.h1.=2.42 × 6 × 2 × 0.04=1.1616t, wherein b1=va.t1=2m/min
× 1min=2m.
(2) link that paves asphalt itself discharges CO2The calculating of gas
1. asphalt itself discharges CO2The calculating of gaseous mass concentration
On the basis of obtaining calculating parameter, in conjunction with the mass concentration transformation model (5) of gas, national highway can be obtained first
104 reorganization and expansion 1 put on surface layer and pave link CO2The mass concentration of gas, in order to facilitate understanding specific calculating process, this programme
It is introduced by taking the test point 1 in table 2 as an example, the mass concentration calculated result of other each test points is as shown in table 3.
As shown in Table 2, the CO of test point 12Void fraction is 621ppm, in the atmosphere in conjunction with known to paving site
CO2Void fraction, the temperature of atmosphere and pressure, CO2The relative molecular mass of gas can show that 104 reorganization and expansion 1 of national highway is marked
Upper layer paves the CO of link test point 12Gaseous mass concentration are as follows:
The calculation method of other each test points of the link that paves is consistent with test point 1, by the volumetric concentration value of each test point
And calculating parameter substitutes into the mass concentration transformation model (5) of gas respectively, can obtain the mass concentration value of other each test points, meter
The results are shown in Table 3 for calculation.
Table 3 paves each test point CO of link asphalt2The mass concentration value of gas
The concentration of mixture discharge gas is related with the position of test point on paver when due to paving, it needs first
Establish CO2The relationship of gaseous mass concentration and paver position, in conjunction with the link CO that paves2The mass concentration of gas is along paver
The mass concentration of each test point on the paver obtained in the computation model (6) and table 3 of width direction can obtain the link drip that paves
Green mixture itself discharges CO2The mass concentration and test point positional relationship of gas are as follows:
ρm1=-10.951L2+64.818L+381.98；
2. the link that paves asphalt itself discharges CO2The calculating of gas
In clear bituminous mixture laying link CO2Mass concentration calculated result, the calculating matter of asphalt of gas
Amount, CO2The above calculated result after calculating time, width of roadway and the length that paves, is substituted into computation model by the evaporation rate of gas
(1) it is calculated in and by Matlab software, it is mixed can to show that the surface layer link pitch per ton that paves is put in 104 reorganization and expansion 1 of national highway
Close material itself discharge CO2The amount of gas:
Step 2: link asphalt per ton itself discharge CO is rolled2The calculating of gas
(1) acquisition of link calculating parameter is rolled
1. CO in on-site test atmosphere and asphalt2The volumetric concentration of gas
After paver paves, CO in the atmosphere of link locality is rolled using the detection of ZR-3200 type smoke comprehensive analyzer2Gas
The volumetric concentration of body is 381.6ppm；In the CO for rolling link discharge to asphalt2When void fraction is detected,
Detection time be since first pressing to CO2CO in the volumetric concentration and atmosphere of gas2Until the consistent no longer variation of gas concentration,
Detection time is longer, during this period CO2The volumetric concentration of gas with detection time and the temperature of asphalt reduction without
It is disconnected to reduce, therefore, it is necessary first to study CO2The volumetric concentration of gas and the relationship for rolling the time.The national highway 104 of on-site test changes
The CO that surface layer rolls the discharge of link asphalt is put in enlarging 12Void fraction and relationship such as 4 institute of table for rolling the time
Show.
Table 4 rolls CO in link asphalt2Void fraction with detection time changing value
2. rolling the calculating time of link asphalt
Link asphalt discharge CO is rolled by putting on surface layer to 104 reorganization and expansion 1 of national highway2The volumetric concentration of gas into
Row detection is it is found that the CO of surface layer asphalt discharge is put in 104 reorganization and expansion 1 of national highway2Since gas concentration rolling to close
Time used is 1820s when atmospheric concentration, and therefore, the calculating time which rolls link asphalt takes 1820s.
3. rolling CO in link asphalt2The evaporation rate of gas
CO in asphalt2The evaporation rate of gas and the temperature of mixture are related, and pitch mixes in roller compaction process
The temperature of material can constantly be reduced with the progress of detection time, therefore firstly the need of the temperature for establishing roller compaction process Asphalt Mixture
The relational model of degree and detection time.Scene is using fluke infrared ray handheld thermometer detection asphalt in not equality of temperature
The lower relationship with detection time of degree, the results are shown in Table 5.
5 national highway of table, 104 reorganization and expansion 1 mark rolls the temperature of link asphalt and the relationship of detection time
The temperature of asphalt and the relationship of detection time are obtained in table 5, in conjunction with rolling link asphalt
The relational model (12) of temperature and detection time, can obtain the temperature of asphalt and the relationship of detection time are as follows:
T=A3t2+B3t+C3T=5 × 10-6t2-0.0423t+157.53
The relation curve of the temperature of the asphalt fitted and detection time is substituted into gaseous volatilization speed and temperature
Relational model (11) in, can obtain the evaporation rate for rolling link asphalt gas and the relational model that rolls time t
v2=-3 × 10-6T2+ 0.0021T+0.1337, in which: T=5 × 10-6t2-0.0423t+157.53。
4. the measurement of atmospheric temperature and pressure
It rolls link to carry out after paving, scene carries out atmosphere using DYM3-03 digital temperature barometer
The detection of temperature and air pressure, testing result show that temperature and pressure in atmosphere are respectively 33 DEG C and 98173Pa.
5. determining the calculating quality for rolling link asphalt
The calculating quality for rolling link asphalt is the quality of asphalt in calculating face, and field investigation is learnt,
The core boring sampling density of upper layer is 2.42 (t/m3), upper layer is with a thickness of 0.04m, wherein CO2The length of gas sampling cover with
Width is the square that side length is 0.5m, and the above calculating parameter is substituted into computation model (10) respectively, can must roll link drip
The calculating quality of green mixture are as follows: m2=ρ2.a2.b2.h2=2.42 × 0.5 × 0.5 × 0.04=0.0242t.
(2) link asphalt itself discharge CO is rolled2The calculating of gas
1. asphalt itself discharges CO2The calculating of gaseous mass concentration
On the basis of obtaining calculating parameter, in conjunction with the mass concentration transformation model (5) of gas, national highway can be obtained first
104 reorganization and expansion 1 mark rolls link CO2The mass concentration of gas, specific calculating process in order to facilitate understanding, this programme is with table 4
Middle detection time corresponding CO when being 600s2For void fraction detected value, calculating rolls link Asphalt Mixture
The mass concentration calculated result of mass concentration, the corresponding each test point of other times is as shown in table 6.
As shown in Table 4, CO when detection time is 600s2Void fraction is 487ppm, in conjunction with having rolled link scene
The CO in atmosphere known2Void fraction, the temperature of atmosphere and pressure, CO2The relative molecular mass of gas and the matter of gas
It measures concentration transformation model (5), can show that 104 reorganization and expansion 1 of national highway puts on surface layer and rolls CO when link detection time is 600s2Gas
Mass concentration are as follows:
Roll the CO of other each time points of link corresponding asphalt discharge2The calculation method of gaseous mass concentration with
Detection detection time is consistent when being 600s, by corresponding CO of each time point2Void fraction value and calculating parameter generation respectively
The mass concentration transformation model (5) for entering gas, can obtain the mass concentration value for rolling other each time points of link, calculated result is such as
Shown in table 6.
Each time point CO of bituminous mixture laying link is marked in 6 national highway of table, 104 reorganization and expansion 12The mass concentration value of gas
Since the concentration of roller compaction process Asphalt Mixture discharge gas is constantly reduced with the progress of detection time,
Firstly the need of establishing CO2The relationship of gaseous mass concentration and detection time；CO is discharged according to link asphalt itself is rolled2
The mass concentration of gas and the computation model (9) of detection time, and combine CO in 104 reorganization and expansion 1 of the national highway mark obtained in table 62
The mass concentration of gas and the relationship of detection time can obtain and roll link project Asphalt Mixture itself discharge CO2Gas
The mass concentration of body and the relationship of detection time are as follows: ρm2=1 × 10-4t2-0.395t+404.07。
2. rolling link asphalt per ton itself discharge CO2The calculating of gas
Link CO is rolled in clear asphalt2Mass concentration calculated result, the calculating matter of asphalt of gas
Amount, CO2The above calculated result after calculating time, the length of sample cover and width, is substituted into computation model by the evaporation rate of gas
(1) it is calculated in and by Matlab software, can obtain and 104 reorganization and expansion 1 of national highway put on surface layer to roll link pitch per ton mixed
Close material itself discharge CO2The amount of gas:
Step 3, construction site asphalt per ton itself discharge CO2The computation model of amount
Link asphalt per ton itself discharge CO is paved and rolled showing that 104 reorganization and expansion 1 of national highway is marked2Amount after,
CO is discharged in conjunction with construction site asphalt per ton itself2Computation model (3), can from which further follow that 104 reorganization and expansion 1 of national highway
It marks construction site asphalt per ton itself and discharges CO2Amount:
ECO2 (construction site)=ECO2 (paves)+ECO2 (is rolled)=55.425+1063.254
=1118.679g/t
Step 4, construction site asphalt itself discharge CO2Total amount
Asphalt itself discharges CO at the construction field (site)2Total amount by the discharge of construction site asphalt per ton CO2
The amount of gas and the dosage of asphalt determine.
1. determining construction site asphalt dosage
The total length that 104 reorganization and expansion 1 of the national highway scene of marking paves and rolls is 1500m, and upper layer is with a thickness of 0.04m, drill core
Sampling density is 2.42 (t/m3), width of roadway 12m, in conjunction with the computation model of detailed programs Asphalt Mixture dosage
(13), it can show that itself discharge CO in surface layer asphalt work progress is put in 104 reorganization and expansion 1 of national highway2Amount are as follows:
G(asphalt)=ρ .a2.b3.h=2.42 × 12 × 1500 × 0.04=1742.4t
2. asphalt itself discharges CO2The calculating of gas gross
In clear construction site, asphalt per ton itself discharges CO2Amount after, mixed in conjunction with pitch in detailed programs
The dosage of material can obtain the CO that detailed programs Asphalt Mixture discharges at the construction field (site)2Total amount；104 reorganization and expansion 1 of national highway is put on
Surface layer asphalt per ton itself discharges CO2Amount be 1118.679g/t, the dosage of construction site asphalt is
1742.4t, in conjunction with CO2Total emission volumn computation model (4) can show that CO is marked in 104 reorganization and expansion 1 of national highway2Total emission volumn:
ECO2 (total amount)=ECO2 (construction site)·G(asphalt)=1118.679 × 1742.4
=1.949 × 106g
Above-mentioned specific embodiment is merely illustrative of the technical solution of the present invention, and is not to make any type of limit to the present invention
It makes, the design parameter in embodiment is detected by field investigation and obtained, and calculated result more can accurately reflect current pitch mixing
Expect itself discharge CO2Degree, any modification or equivalent variations that technology according to the present invention is actually made still fall within the present invention
Technical scope claimed.
Claims (8)
1. a kind of measuring and calculating construction site asphalt itself discharges CO2Calculation method, it is characterised in that the following steps are included:
S1 determines that construction site paves and roller compaction processes asphalt itself discharges CO2Required calculating parameter；
S1.1, the selected calculating parameter needed for link that paves；
S1.2 selectes calculating parameter needed for rolling link；
S2, scene, which obtains, paves and rolls link asphalt discharge CO2The calculating parameter of gas；
S3 establishes construction site and paves and roll link asphalt per ton itself discharge CO2Computation model；
S3.1 establishes link asphalt per ton itself the discharge CO that paves2The computation model of gas:
After the calculating parameter for determining the link that paves, link asphalt per ton itself the discharge CO that paves is calculated according to the following formula2's
Amount:
In formula, ECO2 (paves)CO is discharged for the link that paves asphalt per ton itself2The amount (g/t) of gas；ρm1For the link that paves
CO2Mass concentration (the mg/m of gas3)；a1For paver width (m)；b1For the length (m) that paves；v1For CO2The volatilization speed of gas
It spends (m/s)；t1For the link gas detection time (s) that paves；1000 reduced unit to convert milligram to gram；m1For the ring that paves
Save the calculating quality (t) of asphalt；
S3.2, foundation roll link asphalt per ton itself discharge CO2The computation model of gas:
It calculates according to the following formula and rolls link asphalt per ton itself discharge CO2Amount:
In formula, ECO2 (is rolled)CO is discharged to roll link asphalt per ton itself2The amount (g/t) of gas；ρm2To roll link
CO2Mass concentration (the mg/m of gas3)；a2For gas collector sample cover width (m)；b2For gas collector sample cover
Length (m)；v2To roll link CO2The evaporation rate (m/s) of gas；t2For the detection time (s) for rolling link gas；1000
For the reduced unit for converting milligram to gram；m2For the calculating quality (t) for rolling link asphalt；
S4 establishes construction site asphalt per ton itself discharge CO2The computation model of amount:
From which further follow that construction site asphalt per ton itself discharges CO according to the following formula2Computation model:
ECO2 (construction site)=ECO2 (paves)+ECO2 (is rolled) (3)
In formula, ECO2 (construction site)CO is discharged for construction site asphalt per ton itself2The amount (g/t) of gas；ECO2 (paves)For booth
It spreads link asphalt per ton itself and discharges CO2The amount (g/t) of gas；ECO2 (is rolled)To roll link asphalt per ton certainly
Body discharges CO2The amount (g/t) of gas；
S5 establishes detailed programs Asphalt Mixture itself discharge CO2The computation model of total amount:
CO2Total emission volumn is calculated as the following formula:
ECO2 (total amount)=ECO2 (construction site)·G(asphalt) (4)
In formula, ECO2 (total amount)CO is discharged for construction site detailed programs Asphalt Mixture itself2The total amount (g) of gas；
ECO2 (construction site)CO is discharged for construction site mixture per ton itself2The amount (g/t) of gas；G(asphalt)For the pitch of detailed programs
Mixture dosage (t)；
Construction site in S1 is paved and is rolled the data obtained in the carbon emission calculating parameter and S2 of link and substitutes into meter respectively by S6
Model (1), (2) are calculated, obtains pave and roll link asphalt discharge CO per ton respectively2The amount of gas will calculate later
As a result computation model (3) are substituted into respectively, in (4), show that construction site detailed programs Asphalt Mixture itself discharges CO2Gas
Total amount.
2. measuring and calculating construction site according to claim 1 asphalt itself discharges CO2Calculation method, feature exists
In: in step S1, when carrying out carbon emission amount calculating, the volumetric concentration of gas is converted into mass concentration, conversion formula such as (5)
It is shown:
In formula, ρm(CO2)CO is discharged for asphalt itself2Mass concentration (the mg/m of gas3)；ρv1For CO in asphalt2
The volumetric concentration (ppm) of gas；ρvaFor CO in atmosphere2Volumetric concentration (ppm)；MCO2For CO2The relative molecular mass of gas
(CO244) relative molecular mass of gas is；t0For atmospheric temperature (DEG C)；Ba is atmospheric pressure (Pa)；
CO is carried out in the asphalt to the link that paves2When void fraction detects, along paver screw point in detection process
Glassware width direction is uniformly distributed 6 test points from left to right, and each test point position is located at the L/ of paver width direction
At 12, L/4,5L/12,7L/12,9L/12,11L/12, each test point respectively takes 15 sample sizes, and with the sample of each test point
Mean value is as point CO2The calculated value of void fraction；Pass through computation model (5) later for the CO of each test point2Gas volume
Concentration is converted into mass concentration, then establishes the relationship of various point locations in the mass concentration and paver of gas, by paving
The data fitting of each test point in the process, obtains the link CO that paves2Quantization of the mass concentration of gas along paver width direction
Model, as shown in formula (6):
ρm1=A1L2+B1L+C1 (6)
In formula, ρm1For the link CO that paves2Mass concentration (the mg/m of gas3)；L is the test point position on paver；A1、B1、C1
The respectively coefficient of matched curve, it with test point position and detection sample refer both to it is related.
3. measuring and calculating construction site according to claim 1 asphalt itself discharges CO2Calculation method, feature exists
In: in step S1, in bituminous mixture laying link, often paved with paver 1min when a length of calculating time, asphalt
The calculating quality length that takes paver to advance per minute and the asphalt along paver width direction, computation model difference
As shown in formula (7), (8):
b1=va.t1 (7)
m1=ρ .a1.b1.h (8)
In formula, b1For the length (m) that paves；t1For the calculating time (s) for the link asphalt that paves；vaFor paving for paver
Speed (m/s)；m1Often pave for paver 1min when along paver width direction asphalt calculating quality (t)；ρ is drip
Green mixture core boring sampling density (t/m3)；a1For single machine paving width (m)；H is the thickness (m) of bituminous mixture laying.
4. measuring and calculating construction site according to claim 1 asphalt itself discharges CO2Calculation method, feature exists
In: CO is being carried out to the asphalt for rolling link2When void fraction detects, the calculating time of link carbon emission is rolled
t2For since first pressing into asphalt CO2The gas concentration of emission time no longer changed consistent with atmosphere；In addition, establishing
The relational model of gas concentration of emission and detection time: the CO that will test first2Void fraction substitutes into computation model (5)
Obtain CO2The mass concentration of gas, then by rolling link CO2The data of gaseous mass concentration and detection time are intended
It closes, show that the link asphalt itself discharges CO2The mass concentration of gas and the relational model of detection time, computation model
As shown in formula (9):
ρm2=A2t2+B2t+C2 (9)
In formula, ρm2To roll link CO2Mass concentration (the mg/m of gas3)；T is detection time (s)；A2、B2、C2Respectively it is fitted
The coefficient of curve, it with detection time and detection sample refer both to it is related.
5. measuring and calculating construction site according to claim 1 asphalt itself discharges CO2Calculation method, feature exists
In: in step S1, the calculating quality for rolling link asphalt is taken by the length of sample cover with width, surface thickness and drill core
Sample density determines, shown in computation model such as formula (10):
m2=ρ .a2.b2.h (10)
In formula, m2For the calculating quality (t) of asphalt in sample cover sample range；ρ is the density (t/ of road surface core boring sampling
m3)；a2For sample cover width (m)；b2For sample cover length (m)；H is the thickness (m) of surface layer.
6. measuring and calculating construction site according to claim 1 asphalt itself discharges CO2Calculation method, feature exists
In: in step S2, pass through CO under detection different temperatures2The evaporation rate of gas, fitting obtain asphalt gaseous volatilization speed
Shown in relational model such as formula (11) of the degree with temperature:
V=-3 × 10-6T2+0.0021T+0.1337 (11)
In formula, v CO2The evaporation rate (m/s) of gas；T is the temperature (DEG C) of asphalt.
7. measuring and calculating construction site according to claim 1 asphalt itself discharges CO2Calculation method, feature exists
In: in step S2, it is fitted by the data to the temperature and detection time that roll link asphalt, obtains and roll ring
The temperature of asphalt and the relational model of detection time are saved, as a result as shown in formula (12):
T=A3t2+B3t+C3t (12)
In formula, T is the temperature (DEG C) for rolling link asphalt；T is detection time (s)；A3、B3、C3Respectively matched curve
Coefficient, it is related with the temperature of asphalt and detection time.
8. measuring and calculating construction site according to claim 1 asphalt itself discharges CO2Calculation method, feature exists
In: in step S5, the dosage of detailed programs construction site asphalt is applied by the thickness of surface layer, core boring sampling density, road surface
The length and width of roadway of work determine, shown in computation model such as formula (13):
G(asphalt)=ρ .a3.b3.h (13)
In formula, G(asphalt)For the dosage (t) of detailed programs asphalt；ρ is the density (t/m of road surface core boring sampling3)；a3For
Width of roadway (m)；b3For pavement construction length (m)；H is the thickness (m) of surface layer.
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