FTIR analysis of UV aging on bitumen and its fractions

The ultraviolet (UV) aging of bitumen involves a series of complex chemical reactions due to its complicated chemistry and structure. To conduct the UV aging on simplified components of bitumen is very helpful to reveal the UV aging mechanism accurately. In this study, two bitumens were separated in...

Full description

Saved in:
Bibliographic Details
Published in:Materials and structures 2016-04, Vol.49 (4), p.1381-1389
Main Authors: Feng, Zhen-gang, Bian, Hui-juan, Li, Xin-jun, Yu, Jian-ying
Format: Article
Language:English
Subjects:
Asphaltenes
Bitumens
Building construction
Building Materials
Chemical reactions
Civil Engineering
Engineering
Fourier transforms
Machines
Manufacturing
Materials Science
Original Article
Oxidation
Polymers
Processes
Solid Mechanics
Solubility
Theoretical and Applied Mechanics
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The ultraviolet (UV) aging of bitumen involves a series of complex chemical reactions due to its complicated chemistry and structure. To conduct the UV aging on simplified components of bitumen is very helpful to reveal the UV aging mechanism accurately. In this study, two bitumens were separated into four generic fractions (saturates, aromatics, resins and asphaltenes) respectively by solubility procedures and chromatographic techniques. Both bitumens and their fractions were processed to form a thin film and then aged under UV irradiation for a certain time. The Fourier transform infrared spectra of bitumens and their fractions before and after the UV aging were recorded and quantitatively analyzed based on four structural indexes to evaluate the effect of UV aging on chemical evolution of bitumens and fractions. The results show that the bitumens and their generic fractions all suffer from reactions of oxidation and aromatization during the UV aging. The single fraction separated from the bitumen suffers from more severe oxidation and is more vulnerable to the UV aging than the bitumen itself. Among the four generic fractions, saturates are the most unstable components to be oxidized by the UV aging.
ISSN:1359-5997
1871-6873
DOI:10.1617/s11527-015-0583-9