| Abstract: | In this work,the chemical properties of asphalt were evaluated during the laboratory aging. The rolling thin film oven (RTFO),termed as short-term aging,and pressurized aging vessel (PAV),termed as long-term aging. Tests were used to simulate the laboratory aging of this asphalt. The performance characteristics of asphalt depends the chemical composition of asphalt. NMR spectroscopy enables etailed information about the Carbon-and-hydrogen types of asphalt without separating it into different components. Carbon and proton NMR measurements of asphalt showed that isomerization was the main chemical reactions of hydrocarbon groups following aging. The Corbett fractionation procedure was used to separate fresh and aged asphalts into four generic fractions,namely; asphaltenes,aromatics,resins and saturates were applied to evaluate the chemical changes that occurred during the aging processes. |
