Quantization method for VOCs composition and emission amount of asphalt pavement construction site

A quantitative method and technology on the construction site, applied in the direction of measuring devices, sampling, instruments, etc., can solve the problems of low content, unclear objects, and many types of asphalt VOCs

Pending Publication Date: 2022-02-08
WUHAN UNIV OF TECH
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Problems solved by technology

The present invention proposes to take photochemically reactive substances as the main research object, conduct quantitative analysis on the material composition of asphalt VOCs, cover the main substances of asphalt VOCs as much as possible, solve the difficulties of asphalt VOCs with many types, low content, and unclear objects, and provide a basis for subsequent quantification Lay a solid foundation for asphalt VOCs environmental impact assessment

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  • Quantization method for VOCs composition and emission amount of asphalt pavement construction site
  • Quantization method for VOCs composition and emission amount of asphalt pavement construction site
  • Quantization method for VOCs composition and emission amount of asphalt pavement construction site

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Embodiment 1

[0044] Be located in Wuhan by the field investigation of the Beijing-Zhuhai Expressway Hubei section road maintenance special engineering project, choose the asphalt storage tank, the asphalt mixing station blanking place and the paved road surface as sampling points respectively, according to the sample collection of the present invention and The detection and analysis method analyzes the distribution and emission of asphalt VOCs in the process of asphalt pavement construction.

[0045] The results show that the VOCs detected on the asphalt pavement construction site mainly include ketones, aldehydes, alcohols, acids, aromatic compounds and alkanes, alkenes and cycloalkanes. Among them, there are the most kinds of aliphatic hydrocarbons, accounting for nearly 70%. The main components are saturated aliphatic hydrocarbons, mainly involving C5-C8 straight chain and branched chain alkanes, including n-hexane, heptane, 2-methylheptane, octane , 2,3-dimethylpentane, and 3-methylhep...

Embodiment 2

[0048] According to the sample collection of the present invention and the quantitative analysis method, the components of the VOCs released when paving different graded structure asphalt surface layers and content were measured. According to the on-site pavement structure design, VOCs samples during the paving process of AC-16, AC-20 and ATB-30 asphalt pavement surface structures were mainly collected.

[0049] The results show that the total emission of VOCs is 433ug / m3 when paving asphalt pavement with different surface structures 3 -585ug / m 3 At the same time, the distribution of asphalt VOCs is consistent, and the emission of aliphatic hydrocarbons accounts for the highest proportion, exceeding 50%, which shows that the aliphatic hydrocarbons in asphalt VOCs are not only the largest in number, but also the highest in emissions. By comparing the content of various types of substances, it is found that during the construction of different asphalt pavement structures, due ...

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Abstract

The invention discloses a method for quantifying VOCs composition and total emission amount of an asphalt pavement construction site. The method comprises the steps that VOCs samples of the construction site are collected; a gas chromatography/mass spectrometry technology is adopted to analyze the distribution condition of main components of the asphalt VOCs, photochemical reaction active substances are taken as research objects, the substance composition of the asphalt VOCs is quantitatively analyzed, and the composition and the total emission amount of the asphalt VOCs in the asphalt pavement construction site are obtained. According to the method, the VOCs emission distribution characteristics of the asphalt are simply and visually presented, main active species are clarified, and the problems that the VOCs of the asphalt are multiple in variety, low in content, indefinite in object and the like are solved; the change trend of asphalt VOCs substances under different conditions is ascertained through the change of the contents and proportions of various types of substances, an asphalt VOCs emission factor database is enriched, different environmental influence effects can be conveniently evaluated according to the characteristics of various types of substances of asphalt VOCs, and targeted prevention and control measures are put forward.

Description

technical field [0001] The invention relates to the field of analysis and detection of asphalt VOCs, in particular to a method for quantifying the composition and emission of VOCs at an asphalt pavement construction site. Background technique [0002] Asphalt material is an organic gelling material composed of complex organic hydrocarbons and their derivatives. It is widely used in waterproofing projects and road paving due to its excellent properties such as good adhesion, corrosion resistance and water resistance. and other fields. However, due to the polymer properties of the asphalt material itself, it is affected by environmental factors such as temperature and light during the production and application process, releasing volatile organic compounds (Volatile organic compounds, VOCs), which has a significant impact on the human body and the environment . [0003] With the continuous attention of the society to air pollution in recent years, the control of air pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N1/24
CPCG01N30/88G01N1/2294G01N2030/884G01N2030/8854G01N2030/8845
Inventor 吴少鹏李娜牛韵雅江琪谢君庞凌陈美祝刘全涛
Owner WUHAN UNIV OF TECH
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