Thermal Analysis on the Interactions Among Asphalt Modified with SBS and Different Degraded Tire Rubber

The cross-linked network present in crumb rubber (CR) limits its uniform dispersion in styrene-butadiene styrene modified asphalt (SBSMA). For this purpose, CR was degraded using a twin screw extruder to improve its dispersion properties in SBSMA. Different degraded rubbers (DR) prepared at different degradation temperatures were blended with SBSMA. Interaction in asphalt, SBS and degraded rubber were analyzed and compared using thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The degradation behavior, glass transition temperature and the low temperature rheological properties of the modified asphalt were evaluated. The results indicate that the degree of degradation in the CR affects its dispersion and interactions with SBSMA, which further influences the performance of the modified asphalts. The morphological analysis explains the mechanism of interactions within the degraded rubber, asphalt and SBS, specifies that the modification of the asphalt occurs via the exchange of materials among these three components.

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  • English

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  • Accession Number: 01679311
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 11 2018 3:43PM