DISCRIMINATION METHOD OF OILS IN RECOVERED ASPHALT

Abstract

 Oil containing asphalts are applied to a test for separation of the asphalt into four fractions, FT-IR, and TG-DTA/MS to investigate discrimination method of the oil. The authors found TG-DTA/MS could indicate that some sort of oil was contained in the asphalt. But, information on what sort of hydrocarbons were contained in the asphalt was necessary to discriminate oils in asphalt. Pyro-GC/MS was additionally applied to evaluate hydrocarbons in oil containing asphalt. Total ion chromatogram indicated that machine oil containing asphalt generates peaks due to n-alkane and its isomer in 35~50 minutes of retention time and light oil generates peaks due to n-alkane whose carbon number is from 13 to 27.