Study of the Rheological Properties and Thermal Performance of Polymer-Modified Asphalt
DOI:
https://doi.org/10.31185/bsj.Vol21.Iss35.1418Keywords:
Asphalt، polymeric materials، rheological propertiesAbstract
This work included a comprehensive study to investigate the influence of adding polymeric materials on some properties such as the rheology of the asphalt mixtures and its thermal performance. A polymeric blend consisting of two different polymers was selected for addition to asphalt: styrene butadiene styrene (SBS) with polyethylene vinyl acetate. The polymer blend (SBS: EVA) was incorporated into the asphalt in equal proportions، with a gradual increase in the percentage of the additive to the asphalt and as follows: (1، 2، 3، 4، 5، 7، 6، 8، 9، 10) % by weight. The polymer-asphalt mixture was heated between (170 -180) °C for up to 60 minutes. Different tests have been applied on modified asphalt samples to determine the changes in the rheology of the asphalt samples which show changes in presence of polymeric material additives. Accordingly، the stability of the modified asphalt was determined through exposed it to different thermal and environmental conditions with continuous traffic. Tests conducted included ductility، penetration، softening point، Marshall stability and chemical immersion، as well as separation of asphaltene from asphalt samples and determination of the percentage of separated asphaltene.
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