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Method for detecting content of volatile organic compounds in asphalt

A technology of volatile organic compounds and detection methods, which is applied in the field of analysis and detection, can solve the problems of difficult collection of asphalt VOCs and the inability to quantitatively study VOCs emissions, etc., and achieve the effect of simple and easy-to-operate detection methods

Pending Publication Date: 2020-06-19
BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are no standardized instruments and standards for the analysis and detection of VOCs volatilized during the production and use of asphalt mixtures, especially in the process of asphalt mixture paving, due to asphalt mixture loading, transportation and paving, etc. The process is all open, the released gas is directly discharged into the atmosphere, and the volatilized asphalt VOCs are not easy to collect
Therefore, during the construction process, the detection of exhaust gas can only rely on portable devices to quickly indicate the concentration level, and cannot quantitatively study the emission of VOCs

Method used

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  • Method for detecting content of volatile organic compounds in asphalt
  • Method for detecting content of volatile organic compounds in asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] VOCs content test of ordinary base asphalt.

[0068] (1) Test instruments and materials

[0069] Heating electric furnace; asbestos pad; asphalt sample container; temperature gun; balance; glass rod; watch glass.

[0070] (2) Test

[0071] 1. Sample pretreatment

[0072] Adjust the temperature of the heating furnace to 135°C, put the sample holder (stainless steel lunch box) containing the matrix asphalt sample on the heating furnace, add an asbestos pad on the heating furnace, and keep stirring with a glass rod, stop heating when the asphalt is in a flowing state, Heating was continued for 3 min. Take out 2 samples of the required quantity (about 1g), and put them into 2 sample containers for testing.

[0073] 2. Determination of volatile content

[0074] In order to improve the accuracy, two parallel samples were used in the experiment. Take 2 watch glasses and wrap them with aluminum foil, and use an analytical balance to weigh the watch glass mass m 0 21.8159...

Embodiment 2

[0080] VOCs content test of ordinary base asphalt.

[0081] (1) Test instruments and materials

[0082] Heating electric furnace; asbestos pad; asphalt sample container; temperature gun; balance; glass rod; watch glass.

[0083] (2) Test

[0084] 1. Sample pretreatment

[0085] Adjust the temperature of the heating furnace to 135°C, put the sample holder (stainless steel lunch box) containing the matrix asphalt sample on the heating furnace, add an asbestos pad on the heating furnace, and keep stirring with a glass rod, stop heating when the asphalt is in a flowing state, Heating was continued for 3 min. Take out 2 samples of the required quantity (about 1g), and put them into 2 sample containers for testing.

[0086] 2. Determination of volatile content

[0087] In order to improve the accuracy, two parallel samples were used in the experiment. Take 2 watch glasses and wrap them with aluminum foil, and use an analytical balance to weigh the watch glass mass m 0 They ar...

Embodiment 3

[0093] VOCs content test of modified asphalt.

[0094] (1) Test instruments and materials

[0095] Heating electric furnace; asbestos pad; asphalt sample container; temperature gun; balance; glass rod; watch glass.

[0096] (2) Test

[0097] 1. Sample pretreatment

[0098] Adjust the temperature of the heating furnace to 135°C, put the sample holder (stainless steel lunch box) containing the modified asphalt sample on the heating furnace, put an asbestos pad on the heating furnace, and keep stirring with a glass rod, stop heating when the asphalt is in a flowing state , heating continued for 3min. Take out 2 samples of the required quantity (about 1g), and put them into 2 sample containers for testing.

[0099] 2. Determination of volatile content

[0100] In order to improve the accuracy, two parallel samples were used in the experiment. Take 2 watch glasses and wrap them with aluminum foil, and use an analytical balance to weigh the watch glass mass m 0 They are 29.77...

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Abstract

The invention relates to the field of analysis and detection, in particular to a method for detecting the content of volatile organic compounds in asphalt. The method comprises the following steps: heating an asphalt sample with a first mass to a constant weight under a vacuum condition to acquire the mass of the heated asphalt as a second mass; and calculating the content of volatile organic compounds in the asphalt according to the first mass, the second mass and the water content of the asphalt sample. The method for detecting the content of the volatile organic compounds in the asphalt provided by the embodiment of the invention is simple and easy to operate; an accurate result can be obtained through selection of various conditions and parameters, the testing process can simulate thevolatilization process in the asphalt paving process and after paving, and the VOCs content obtained through testing can calculate the emission content of organic matter in the asphalt paving processand after paving.

Description

technical field [0001] This application relates to the field of analysis and detection, in particular, to a method for detecting the content of volatile organic compounds in asphalt. Background technique [0002] Asphalt mixture volatile organic compounds (Volatile Organic Compounds; VOCs) mainly refer to a type of aerosol produced by asphalt materials during the production and construction process, which is a mixture of small solid particles and gas volatiles as the main components. [0003] At present, there are no standardized instruments and standards for the analysis and detection of VOCs volatilized during the production and use of asphalt mixtures, especially in the process of asphalt mixture paving, due to asphalt mixture loading, transportation and paving, etc. The process is all open, the released gas is directly discharged into the atmosphere, and the volatilized asphalt VOCs are not easy to collect. Therefore, during the construction process, the detection of ex...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N31/16
CPCG01N5/04G01N31/16
Inventor 曲松聂磊樊守彬何万清石爱军黄玉虎赵芸程
Owner BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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