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Chemical characterization of oil-based asphalt release agents and their emissions
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Highway and Railway Engineering.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Highway and Railway Engineering.
2006 (English)In: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 85, no 9, 1232-1241 p.Article in journal (Refereed) Published
Abstract [en]

Four commercial asphalt release agents were chemically characterized using different analytical methods. Functional groups and molecular weight distributions were determined by fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR), gel permeation chromatography (GPC) and mass spectrometry (MS). General compositions of the agents were obtained as petroleum hydrocarbons, fatty acid methyl esters (FAMEs), fatty acids and glycerides using gas chromatography-mass spectrometry (GC-MS) and MS probe inlet method. The contents of health related analytes, such as aromatic hydrocarbons and polycyclic aromatic hydrocarbons (PAHs), were determined. Asphalt release agents emission was investigated using thermogravimetric analysis (TGA) and headspace solid-phase microextraction (HS-SPME) The emission proneness as well as emission level of aromatic hydrocarbons from these agents were compared. The results obtained were used for ranking the agents with regard to health hazards.

Place, publisher, year, edition, pages
2006. Vol. 85, no 9, 1232-1241 p.
Keyword [en]
asphalt release agents, petroleum oil, vegetable oil, solid-phase microextraction, aromatic hydrocarbons, PAHs
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:kth:diva-7984DOI: 10.1016/j.fuel.2005.11.002ISI: 000236816400009Scopus ID: 2-s2.0-32544439862OAI: oai:DiVA.org:kth-7984DiVA: diva2:13182
Note
QC 20100913Available from: 2008-02-13 Created: 2008-02-13 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Applications of Solid-Phase Microextraction to Chemical Characterization of Materials Used in Road Construction
Open this publication in new window or tab >>Applications of Solid-Phase Microextraction to Chemical Characterization of Materials Used in Road Construction
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Environmental and health aspects of road materials have been discussed for a long time, mostly regarding bitumen and bitumen fumes. However, just a few studies on other types of road materials have been reported. In this doctoral study, two types of materials, asphalt release agents and bituminous sealants, were investigated with regard to chemical characterization and emission profiles. Besides conventional test methods, solid-phase microextraction (SPME) technique was applied for emissions profiles screening and quantitative analysis.

General description of main characteristics of asphalt release agents and bituminous sealants is given, and a comprehensive state-of-the-art on SPME technique is presented, especially on methodologies for analyzing mono- and polycyclic aromatic hydrocarbons (MAHs and PAHs) in different sample matrices.

In the experimental study, chemical characterization of the two material types was performed using conventional methods, including fourier transform infrared spectroscopy - attenuated total reflectance (FTIR-ATR), gel permeation chromatography (GPC), mass spectrometry (MS) and gas chromatography – mass spectrometry (GC-MS). General patterns regarding functional groups and molecular weight distribution were studied. In the case of asphalt release agents, more detailed information on chemical compositions, especially the contents of MAHs and PAHs, was obtained.

General information on emission proneness of asphalt release agents was obtained using thermogravimetric analysis (TGA) and MS. Using headspace(HS)-SPME and GC-MS, emission profiles of asphalt release agents were characterized at different temperatures, whereas the profiles of bituminous sealants were obtained solely at room temperature. The results presented were used for ranking the materials with regard to degree of total emission as well as emission of hazardous substances.

The applicability of HS-SPME for quantitative analysis of MAHs in asphalt release agents and emulsion-based bituminous sealants was investigated. The use of a surrogate sample matrix was concerned, and experimental parameters influencing the HS-SPME procedure, such as equilibration and extraction time, as well as effects of sample amount and matrices, were studied. The methods were evaluated with regard to detection limit, accuracy as well as precision. Different calibration approaches including external calibration, internal calibration and standard addition were investigated. The determination of MAHs in asphalt release agents and emulsion-based bituminous sealants using HS-SPME-GC-MS was conducted.

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. vi, 54 p.
Series
Trita-VT. FR, ISSN 1650-867X ; 08:01
Keyword
Asphalt release agents, Petroleum oils, Vegetable oils, Bituminous sealants, Bitumen, Emissions, Monocyclic aromatic hydrocarbons, Polycyclic aromatic hydrocarbons, Fourier Transform Infrared Spectroscopy - Attenuated Total Reflectance, Gel Permeation Chromatography, Mass Spectrometry, Gas Chromatography - Mass Spectrometry, Thermogravimetric Analysis, Headspace, Solid-phase microextraction, Calibration.
National Category
Building Technologies
Identifiers
urn:nbn:se:kth:diva-4637 (URN)
Public defence
2008-03-10, Sal F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20100913Available from: 2008-02-13 Created: 2008-02-13 Last updated: 2010-09-13Bibliographically approved

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