OXIDATION INFLUENCE ON THE CHEMICAL CONTENT an‎d SOME RHEOLOGICALY PROPERTIES FOR NATURAL ASPHALT TO ABU ALJEER _ ALANBAR

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Heating of natural asphalt at high temperatures for a long time lead to oxidation of the asphalt , which starting on the surface while with continuous mixing and heating leads to oxidation to all the asphalt molecules and the texture of oxidized asphalt becomes a solid , glossy, dark black of color. The rheological properties before and after oxidation were studied , the results showed that increase of oxidation time , Lead to reduce the degree of penetration(increased stiffness) and an increment in the softening degree, also the oxidation processes load to increase in the fractional Asphaltene compared with that of maltene parts, Which have been separated and estimated by using manual column liquid –solid chromatography and extraction in parallel with a solvent and precipitant the Asphaltene index IA and Gastl index IC were also calculated, the spectra of FT-IR , U.V- visible and HNMR showed a change in the physical properties of oxidated since there was Chemo - Physical relationship between a chemical content and Rheological properties of the oxidized asphalt

Rheology , Natural Asphalt , Thermal oxidation

2012

المجله العراقيه لدراسات الصحراء

المجله العراقيه لدراسات الصحراء