CN114840987B - Road asphalt compound design method for realizing VOCs full-component inhibition - Google Patents
Road asphalt compound design method for realizing VOCs full-component inhibition Download PDFInfo
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Abstract
The invention relates to the technical field of green and low carbon of road engineering, in particular to a road asphalt compound design method for realizing full-component inhibition of VOCs. The specific technical scheme is as follows: a road asphalt compound design method for realizing VOCs full-component inhibition comprises the following steps: (1) Determining the VOCs emission condition of the asphalt material, and determining the subentry weight value calculated by the VOCs comprehensive inhibition index; (2) Designing and primarily simulating the compound combination of the VOCs inhibitors and the mixing amount of each inhibitor; (3) Verifying the actual emission reduction effect of the VOCs compound inhibition type asphalt material; (4) And continuously feeding back and optimizing the VOCs inhibition compound design scheme, and selecting the final VOCs inhibition compound design scheme. The design method disclosed by the invention realizes the large emission reduction of the total concentration of the VOCs, key component key inhibition and comprehensive inhibition of each component, and is beneficial to realizing the aim of high-quality emission reduction of the VOCs in the construction and maintenance process of asphalt pavement engineering in future.
Description
Technical Field
The invention relates to the technical field of green and low carbon of road engineering, in particular to a road asphalt compound design method for realizing full-component inhibition of VOCs.
Background
Volatile Organic Compounds (VOCs) are a generic term for various Volatile Organic Compounds emitted into the atmosphere by human activities and biological metabolism, and are the most common and ubiquitous pollutants in indoor and outdoor air. The sources of VOCs are quite extensive and include primarily natural and man-made sources. The natural source is mainly plant emission, and the human source is mainly human production activity emission. VOCs are a wide variety of substances with different environmental and health negative effects. Wherein: (1) pollution to the air environment (regional environmental hazards). VOCs and NO x After the action of ultraviolet light, O can be generated through complex photochemical reaction 3 Secondary pollutants or intermediate products with strong chemical activity such as free radicals and the like can form photochemical smog, organic aerosol, haze and the like, so that the ecological environment is further destroyed; (2) harm to human body (local environmental hazard). Most VOCs are toxic and have foul smell, when the concentration of VOCs in the air reaches a certain level, the VOCs can cause symptoms such as headache, convulsion, nausea and the like, and have serious harm to heart, liver, lung and nervous system, and serious acute or chronic poisoning can be caused, and cancer and mutation can be caused.
For the construction and maintenance of asphalt pavement engineering, asphalt-based VOCs (volatile organic compounds) are discharged to different degrees from the engineering construction to the service operation and maintenance of the pavement. At present, the research on the discharge inhibition of asphalt-based VOCs is not common, only individual research only preliminarily considers a single value of the total discharge concentration of VOCs, and the VOCs have various components and different health and environmental effects. Therefore, a material design method specially aiming at the inhibition and emission reduction of the asphalt-based VOCs needs to be established, and the emission characteristics and the ecological environment influence effect of different VOCs components are quantitatively considered as far as possible.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a road asphalt compound design method for realizing the full-component inhibition of VOCs, which solves the defect that the influence of the specific ecological environment is ignored while only the discharge concentration of VOCs of an asphalt material is concerned in the prior art, comprehensively reflects the actual inhibition effect of the VOCs inhibition type asphalt material on the total discharge concentration, the ozone generation potential, the SOA generation potential, the carcinogenic risk index, the non-carcinogenic risk index and the discharge concentration of each component, and improves the scientificity of the emission reduction evaluation of the VOCs inhibition of the asphalt material.
In order to realize the purpose, the invention is realized by the following technical scheme:
the invention discloses a road asphalt compound design method for realizing VOCs full-component inhibition, which comprises the following steps:
(1) Determining the VOCs emission condition of the asphalt material, and determining the subentry weight value calculated by the VOCs comprehensive inhibition index;
(2) Designing and primarily simulating the compound combination of the VOCs inhibitors and the mixing amount of each inhibitor;
(3) Verifying the actual emission reduction effect of the VOCs compound inhibition type asphalt material;
(4) And continuously feeding back and optimizing the VOCs inhibition and compounding design scheme, and selecting the final VOCs inhibition and compounding design scheme.
Preferably, in the step (1), the discharge conditions of the VOCs comprise total discharge concentration of the VOCs, ozone generation potential, secondary organic aerosol generation potential, carcinogenic risk index and non-carcinogenic risk index;
and (3) taking the comprehensive inhibition index of the VOCs as a design control index, and verifying the actual emission reduction effect of the VOCs compound inhibition type asphalt material.
Preferably, in step (1), the calculation formula of the comprehensive inhibition index of VOCs is: VRI = ω C ×R C +ω K ×R K +ω F ×R F (1)
In the formula, VRI is the comprehensive inhibition index of VOCs of the VOCs inhibition type asphalt material; omega C 、ω K 、ω F The weight coefficient is a VRI subentry index; r is C The inhibition rate of the total concentration of VOCs; r is K The key component control rate is set; r F The overall inhibition rate of each component.
Preferably, the rate of inhibition of total concentration of VOCs R C The calculation formula of (c) is:
in the formula, C is the total discharge concentration of VOCs of the asphalt material; c' is the total concentration of VOCs discharged by VOCs inhibiting type asphalt materials.
Preferably, the key component emphasis control rate R K The calculation formula of (2) is as follows:
R K ＝α×[OFP] K +β×[SOA] K +χ×[R] K +δ×[HI] K (3)
wherein alpha, beta, chi and delta are R K The weight coefficient of the item index; [ OFP ]] K 、[SOA] K 、[R] K 、[HI] K Are respectively provided withThe inhibition rate of ozone generation potential, SOA generation potential, carcinogenic risk index and non-carcinogenic risk index of the key components of VOCs.
Preferably, said [ OFP] K Calculated according to the following formula:
in the formula, the [ OFP ] is the total ozone generation potential of the key component of the asphalt material; [ OFP ] is the total ozone generation potential of the key component of the VOCs inhibited asphalt material;
VOCs key component ozone generation potential [ OFP ]] i The calculation formula of (2) is as follows:
[OFP] i ＝[VOCs] i ×MIR (5)
wherein [ VOCs ]] i The concentration of the ith key component in the VOCs; MIR is the ozone generation coefficient of VOCs in the ozone maximum increment reaction.
Preferably, [ SOA] K The calculation formula of (c) is:
in the formula, [ SOA ] is the total SOA generation potential of key components of the asphalt material; [ SOA ]' is the total SOA generation potential of the key components of the VOCs inhibition type asphalt material;
SOA generation potential [ SOA ] of key components of VOCs] i The calculation formula of (2) is as follows:
[SOA] i ＝[VOCs] i ×FAC (7)
wherein FAC is the generation coefficient of the secondary organic aerosol.
Preferably, [ R ]] K The calculation formula of (2) is as follows:
in the formula, R is the total carcinogenic risk index of key components of the asphalt material; [ R ]' is the total carcinogenic risk index of the key components of the VOCs inhibiting type asphalt material;
carcinogenic risk index [ R ] of key components of VOCs] i The calculation formula of (c) is:
low dose exposure: [ R ]] i ＝[VOCs] i ×SF (9)
If the calculated low dose is > 0.01, then calculated as high dose exposure:
[R] i ＝1-exp(-[VOCs] i ×SF) (10)
wherein SF is the carcinogenic slope factor of the ith pollutant in the VOCs of bituminous material and refers to the increased carcinogenic risk per unit dose of exposure.
Preferably, [ HI ]] K The calculation formula of (c) is:
wherein [ HI ] is the total non-carcinogenic risk index of key components of the asphalt material; [ HI ]' is the total non-carcinogenic risk index of key components of the VOCs inhibiting type asphalt material;
non-carcinogenic Risk index [ HI ] of key Components of VOCs] i The calculation formula of (2) is as follows:
wherein RfC is the reference dose of the ith pollutant in the VOCs of the asphalt material.
Preferably, the overall inhibition ratio R of each component F The calculation formula of (2) is as follows:
in the formula, N is the total quantity of VOCs components of the asphalt material, and N' is the total quantity of VOCs inhibition type asphalt material components with concentration inhibition rate more than 0;
the calculation formula of the VOCs inhibition type asphalt material single-component concentration inhibition rate is as follows:
wherein [ R ] C ] i The inhibition rate of the concentration of the ith component of the VOCs inhibition type asphalt material, C i Is the concentration of the ith component, C, in the VOCs of the bituminous material i ' is the concentration of the ith component of the VOCs inhibited bituminous material.
The invention has the following beneficial effects:
1. the design method provided by the invention provides the overall design principle and the target of the road asphalt material which is expected to realize the full-component inhibition of VOCs: the total concentration of VOCs is greatly reduced, key components are mainly inhibited, and all components are comprehensively inhibited. The design principle is clear and comprehensive in guidance and beneficial to achieving the purpose of high-quality emission reduction of VOCs in the process of asphalt pavement engineering construction and maintenance in future.
2. The invention provides a brand-new design control index: VOCs integrated inhibitory index (VRI). The index overcomes the defect that the influence of the specific ecological environment is ignored due to the fact that only the emission concentration of the VOCs of the asphalt material is concerned in the prior art, the actual inhibition effect of the VOCs inhibition type asphalt material on the total emission concentration, the ozone generation potential, the SOA generation potential, the carcinogenic risk index, the non-carcinogenic risk index and the emission concentration of each component is comprehensively reflected, and the scientificity of the emission reduction evaluation of the VOCs inhibition of the asphalt material is improved.
Drawings
FIG. 1 is a flow chart of the design method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical means used in the working examples are, unless otherwise specified, conventional means well known to those skilled in the art.
Referring to fig. 1, the invention discloses a road asphalt compound design method for realizing full-component inhibition of VOCs, which comprises the following steps:
(1) Determining the VOCs emission condition of the common asphalt material, and determining the subentry weight value calculated by the VOCs comprehensive inhibition index (VRI) index according to the ecological environment protection requirement of the area where the engineering project is located;
the discharge condition of the VOCs comprises the total discharge concentration of the VOCs, ozone generation potential, secondary organic aerosol generation potential, carcinogenic risk index and non-carcinogenic risk index. The determination of the weighted value of the VRI design index needs to comprehensively consider the atmospheric pollution condition of the area where the engineering project is located and the discharge condition of VOCs used for road construction.
(2) Designing and primarily simulating the compound combination of the VOCs inhibitors and the mixing amount of each inhibitor;
the selection and the doped amount of the VOCs inhibitor are determined by the atmospheric pollution condition of the area where the engineering project is located and the VOCs discharge condition of the common asphalt, and the technical economy of the VOCs inhibitor is also fully considered during compound selection.
(3) Verifying the actual emission reduction effect of the VOCs compound inhibition type asphalt material; and (3) verifying the actual emission reduction effect of the VOCs compound inhibition type asphalt material by taking the VOCs comprehensive inhibition index as a design control index.
(4) And continuously feeding back and optimizing the VOCs inhibition and compounding design scheme, and selecting the final VOCs inhibition and compounding design scheme. Specifically, the method comprises the following steps: and (4) optimizing the compounding combination or the mixing amount of the VOCs according to the actual emission reduction effect of the VOCs compounding inhibition type asphalt material in the step (3) until the relevant requirements of air pollution prevention and control in the area of the engineering project are met. And finally, selecting a VOCs (volatile organic compounds) inhibited road asphalt compound design scheme meeting the relevant requirements of air pollution prevention and control in the area of the engineering project.
The invention provides a method for calculating VOCs comprehensive inhibition Index (VOCs Resistance Index, hereinafter referred to as VRI), which is a VOCs inhibition type asphalt material design control Index, wherein the calculation formula of the VOCs comprehensive inhibition Index is as follows:
VRI＝ω C ×R C +ω K ×R K +ω F ×R F (1)
in the formula, VRI is the comprehensive inhibition index of VOCs of the VOCs inhibition type asphalt material; omega C 、ω K 、ω F The weight coefficient is a VRI subentry index; r C The inhibition rate of the total concentration of VOCs; r is K Key control rates for key components; r is F The overall inhibition rate of each component.
Further, the total concentration inhibition rate R of VOCs C The calculation formula of (c) is:
wherein C is the total discharge concentration of VOCs of common asphalt material, i.e. the single-component discharge concentration (C) of VOCs of asphalt material i ) Arithmetic sum of C i The method is the single-component emission concentration of the asphalt material VOCs measured by test equipment, i =1,2,3 \8230, and represents the ith component in the asphalt material VOCs; and C' is the total concentration of VOCs emission of the VOCs inhibiting type asphalt material.
Further, key component emphasis control rate R K The calculation formula of (2) is as follows:
R K ＝α×[OFP] K +β×[SOA] K +χ×[R] K +δ×[HI] K (3)
wherein, alpha, beta, chi and delta are R K The weight coefficient of the subentry index; [ OFP] K 、[SOA] K 、[R] K 、[HI] K Respectively the inhibition rate of ozone generation potential, the inhibition rate of SOA generation potential, the inhibition rate of carcinogenic risk index and the inhibition rate of non-carcinogenic risk index of key components of VOCs.
The key components of the VOCs have obvious regional differences and need to be determined according to the key components of the VOCs in the atmospheric pollution published by environmental protection departments in the regions where the engineering projects are located.
Specifically, the method comprises the following steps: [ OFP ]] K Calculated according to the following formula:
wherein [ OFP ]]Is the total ozone generation potential of the key component of the common asphalt material, namely the ozone generation potential of the key component of the VOCs of the asphalt material ([ OFP)] i ) An arithmetic sum; [ OFP]' is the total ozone generation potential of a key component of VOCs inhibited asphalt materials.
Wherein, the key component of VOCs ozone generation potential [ OFP] i The calculation formula of (c) is:
[OFP] i ＝[VOCs] i ×MIR (5)
wherein [ VOCs ]] i The concentration of the ith key component in the VOCs; MIR is the ozone generation coefficient of VOCs in the ozone maximum increment reaction. The MIR coefficient is preferably the result of the teaching of Carter (W. Carter. Development of the SAPRC-07chemical mechanism [ J ])].Atmospheric Environment,2010,44:5324-5335.)。
Further, [ SOA] K The calculation formula of (c) is:
in the formula, [ SOA ]]Total SOA generation potential for key components of common asphalt materials, namely SOA generation potential of key components of VOCs of asphalt materials ([ SOA generation potential of SOA ]] i ) An arithmetic sum; [ SOA)]' Total SOA generation potential for key components of VOCs inhibited asphalt materials.
Wherein, key component SOA of VOCs generates potential [ SOA] i The calculation formula of (c) is:
[SOA] i ＝[VOCs] i ×FAC (7)
wherein FAC is the generation coefficient of the secondary organic aerosol. FAC coefficients preferred are those taught by Crosjean for smoke box research results (D. Crosjean. In situ organic evolution degradation a smoke Environment: infected production and chemical function [ J ]. Atmospheric Environment,1992,26 (6): 953-963.).
Further, [ R ]] K The calculation formula of (2) is as follows:
wherein [ R ]]Is the total carcinogenic risk index of the key components of the common asphalt material, namely the carcinogenic risk index of the key components of the VOCs of the asphalt material ([ R ]] i ) An arithmetic sum; [ R ]]' Total carcinogenic risk index, a key component of VOCs inhibited bituminous materials.
Wherein, the key component of VOCs has carcinogenic risk index [ R] i The calculation formula of (2) is as follows:
low dose exposure: [ R ]] i ＝[VOCs] i ×SF (9)
If the calculated low dose is > 0.01, then calculated as high dose exposure:
[R] i ＝1-exp(-[VOCs] i ×SF) (10)
wherein SF is the carcinogenic slope factor of the ith pollutant in the VOCs of bituminous material and refers to the increased carcinogenic risk per unit dose of exposure.
Further, [ HI ]] K The calculation formula of (c) is:
wherein, [ HI ]]Is the total non-carcinogenic risk index of the key components of the common asphalt material, i.e. the non-carcinogenic risk index of the key components of the asphalt material VOCs ([ HI)] i ) An arithmetic sum; [ HI]' is the total non-carcinogenic risk index of key components of the VOCs inhibited asphalt material.
Wherein the key component of VOCs is the non-carcinogenic risk index [ HI] i The calculation formula of (c) is:
wherein RfC is the reference dose of the ith pollutant in the VOCs of the asphalt material.
Further, the overall inhibition rate R of each component F The calculation formula of (2) is as follows:
wherein N is the total quantity of VOCs components of the common asphalt material, and N' is the total quantity of VOCs inhibition type asphalt material component concentration inhibition ratio greater than 0.
The formula for calculating the single-component concentration inhibition rate of the VOCs inhibition type asphalt material is as follows:
wherein [ R ] C ] i The inhibition rate of the ith component concentration, C, of the VOCs inhibition type asphalt material i ' is the concentration of the ith component of the VOCs inhibited bituminous material.
The invention is further illustrated by the following specific examples.
Example 1
(1) And determining the VOCs emission condition of the common asphalt material, and determining the subentry weight value calculated by the VOCs comprehensive inhibition index (VRI) index according to the ecological environment protection requirement of the area where the engineering project is located.
The asphalt material is from a certain level of highway engineering construction project in Jingjin Ji area, and through early investigation, the design requirement of the engineering construction is that the environmental influence of the discharge of the VOCs of the asphalt material in the road construction process is reduced by 30-50%. In order to determine the discharge condition of the VOCs of the selected asphalt material, firstly, the discharge concentration of each component of the VOCs of the selected asphalt material in construction is detected, then, the influence of the discharge of the VOCs of the asphalt material on regional and local environments is further analyzed, and the results are summarized in table 1; then, determining a VRI index calculation weight: the jingjin Ji area belongs to an area with serious atmospheric pollution, wherein PM2.5 pollution is mainly the pollution of particulate matters, and secondary organic aerosol is the main precursor of the atmospheric particulate matters, and in order to more effectively inhibit the influence of asphalt pavement construction on the environment, relevant weights required by VRI calculation are assigned, and the results are shown in tables 2 and 3.
TABLE 1 discharge of VOCs from Normal Pitch
TABLE 2 VRI index calculation weight assignment table
| VRI computation weight | ω C | ω K | ω F |
| Weighted value | 0.25 | 0.5 | 0.25 |
TABLE 3R K Index calculation weight assignment table
| R K Calculating weights | α | β | χ | δ |
| Weighted value | 0.2 | 0.4 | 0.2 | 0.2 |
(2) Compound combination of designed and primarily-designed VOCs inhibitors and mixing amount of each inhibitor
The air pollution condition of the area where the engineering project is located and the discharge characteristics of the VOCs of the common asphalt material are fully considered, and 2 mature VOCs inhibitors in the current technical market are selected: the mixing amount of the activated carbon and the expanded graphite is designed to be 3 percent to prepare the VOCs composite inhibition type asphalt material.
(3) Verifying the actual emission reduction effect of the VOCs-inhibited asphalt material
Firstly, the emission concentration of each component of the VOCs composite inhibition type asphalt material is detected, the VOCs comprehensive inhibition index (VRI) of the VOCs inhibition type asphalt material is further calculated according to the formula (1) to the formula (14), and the calculation result is shown in the table 4.
The key components of the analysis result of the VOCs source of air pollution in Beijing Ji area in recent years are as follows: ethylene, m/p-xylene, propylene, toluene, o-xylene, formaldehyde, 1,2, 4-trimethylbenzene, styrene, acetaldehyde, ethylbenzene, n-dodecane, n-undecane, n-decanone, methylcyclohexane, n-nonane. Further selecting the VRI sub-index key component control rate R of the asphalt material according to the determined key component types of VOCs at the location of the project engineering K The VOCs components used were calculated.
TABLE 4 emission reduction effect of VOCs compounded inhibition type asphalt material
| Modifier and mixing amount | VRI | R C | R K | R F |
| 3% of activated carbon and 3% of expanded graphite | -27.57％ | -12.29％ | -68.99％ | 40.00％ |
As can be seen from Table 4, the VRI index of the VOCs-inhibited asphalt material is-27.57%, and the two subentry indexes are negative values, so that the air pollution prevention and control requirement of engineering project construction cannot be met.
(4) Feedback optimization VOCs (volatile organic compounds) inhibition compound design scheme
The blending amount of the VOCs compound inhibitor is adjusted to 5%, and the emission reduction effect of the VOCs inhibiting type asphalt material after the blending amount is adjusted is verified, and the result is shown in Table 5.
TABLE 5 emission reduction effect of VOCs compounded inhibition type asphalt material
| Modifier and mixing amount | VRI | R C | R K | R F |
| 5% of activated carbon and 5% of expanded graphite | 54.47％ | 35.60％ | 46.16％ | 90.00％ |
As can be seen from Table 5, the VRI index of the VOCs inhibited asphalt material after the doping amount is adjusted to be 54.47%, which shows that the VOCs compound design scheme can reduce about 50% of negative environmental impact of road asphalt, the comprehensive inhibition index is higher than 50%, and the air pollution prevention and control requirements of engineering project construction are met and met.
(5) Road asphalt compound design scheme for selected VOCs full-component inhibition
The final selected compound design scheme is as follows: 5% of activated carbon and 5% of expanded graphite.
The emission reduction effect of the asphalt material VOCs expected to be realized by the compound design scheme comprises the following steps:
(1) designing a control index:
comprehensive inhibition index (VRI) of VOCs: 54.47 percent.
(2) The item index is as follows:
inhibition of total concentration of VOCs (R) C )：35.60％；
Key component emphasis control rate (R) of VOCs K )：46.13％；
Overall inhibition ratio (R) of each component of VOCs F )：90.00％。
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (2)
1. A road asphalt compound design method for realizing VOCs full-component inhibition is characterized by comprising the following steps: the method comprises the following steps:
(1) Determining the VOCs emission condition of the asphalt material, and determining the subentry weight value calculated by the VOCs comprehensive inhibition index;
(2) Designing and primarily simulating the compound combination of the VOCs inhibitors and the mixing amount of each inhibitor;
(3) Verifying the actual emission reduction effect of the VOCs compound inhibition type asphalt material;
(4) Continuously feeding back and optimizing a VOCs inhibition and compounding design scheme, and selecting a final VOCs inhibition and compounding design scheme;
in the step (1), the calculation formula of the indexes of the comprehensive inhibition indexes of the VOCs is as follows:
VRI＝ω C ×R C +ω K ×R K +ω F ×R F (1)
in the formula, VRI is the comprehensive inhibition index of VOCs of the VOCs inhibition type asphalt material; omega C 、ω K 、ω F The weight coefficient is a VRI subentry index; r C The inhibition rate of the total concentration of VOCs; r K Key control rates for key components; r F The overall inhibition rate of each component is shown;
inhibition rate R of total concentration of VOCs C The calculation formula of (2) is as follows:
in the formula, C is the total discharge concentration of VOCs of the asphalt material; c' is the total concentration of VOCs discharged by VOCs inhibiting type asphalt materials;
key component key control rate R K The calculation formula of (c) is:
R K ＝α×[OFP] K +β×[SOA] K +χ×[R] K +δ×[HI] K (3)
wherein, alpha, beta, chi and delta are R K The weight coefficient of the item index;[OFP] K 、[SOA] K 、[R] K 、[HI] K respectively the inhibition rate of ozone generation potential, the inhibition rate of SOA generation potential, the inhibition rate of carcinogenic risk index and the inhibition rate of non-carcinogenic risk index of key components of VOCs;
said [ OFP] K Calculated according to the following formula:
in the formula, [ OFP ] is the total ozone generation potential of the key component of the asphalt material; [ OFP ]' is the total ozone generation potential of the key component of the VOCs inhibition type asphalt material;
VOCs key component ozone generation potential [ OFP ]] i The calculation formula of (2) is as follows:
[OFP] i ＝[VOCs] i ×MIR (5)
wherein [ VOCs ]] i The concentration of the ith key component in the VOCs; MIR is the ozone generation coefficient of VOCs in the ozone maximum increment reaction;
[SOA] K the calculation formula of (2) is as follows:
in the formula, [ SOA ] is the total SOA generation potential of key components of the asphalt material; [ SOA ]' is the total SOA generation potential of the key components of the VOCs inhibition type asphalt material;
SOA generation potential [ SOA ] of key components of VOCs] i The calculation formula of (c) is:
[SOA] i ＝[VOCs] i ×FAC (7)
wherein FAC is the generation coefficient of secondary organic aerosol;
[R] K the calculation formula of (c) is:
in the formula, R is the total carcinogenic risk index of key components of the asphalt material; [ R ]' is the total carcinogenic risk index of the key components of the VOCs inhibiting type asphalt material;
carcinogenic risk index [ R ] of key components of VOCs] i The calculation formula of (2) is as follows:
low dose exposure: [ R ]] i ＝[VOCs] i ×SF(9)
If the calculated low dose is > 0.01, then calculated as high dose exposure:
[R] i ＝1-exp(-[VOCs] i ×SF) (10)
wherein SF is the carcinogenic slope factor for the ith contaminant in the asphaltic material VOCs and refers to the increased carcinogenic risk per unit dose of exposure;
[HI] K the calculation formula of (c) is:
wherein [ HI ] is the total non-carcinogenic risk index of key components of the asphalt material; [ HI ]' is the total non-carcinogenic risk index of key components of the VOCs inhibiting type asphalt material;
non-carcinogenic Risk index [ HI ] of key Components of VOCs] i The calculation formula of (c) is:
wherein RfC is the reference dose of the ith pollutant in the VOCs of the asphalt material;
overall inhibition ratio R of each component F The calculation formula of (2) is as follows:
in the formula, N is the total quantity of VOCs components of the asphalt material, and N' is the total quantity of VOCs inhibition type asphalt material components with concentration inhibition rate more than 0;
the calculation formula of the VOCs inhibition type asphalt material single-component concentration inhibition rate is as follows:
wherein [ R ] C ] i The inhibition rate of the concentration of the ith component of the VOCs inhibition type asphalt material, C i Is the concentration of the ith component, C, in the VOCs of the bituminous material i ' is the concentration of the ith component of the VOCs inhibited asphalt.
2. The road asphalt compound design method for realizing full-component inhibition of VOCs according to claim 1, which is characterized by comprising the following steps:
in the step (1), the discharge condition of the VOCs comprises the total discharge concentration of the VOCs, ozone generation potential, secondary organic aerosol generation potential, carcinogenic risk index and non-carcinogenic risk index;
and (3) taking the comprehensive inhibition index of the VOCs as a design control index, and verifying the actual emission reduction effect of the VOCs compounded inhibition type asphalt material.
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