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- W2245545014 abstract "This paper deals with laboratory characterization of various pure and polymer modified bitumens, in which five bitumens from four sources and six polymers of different types were used. The effects of base bitumens and polymer type and content on compatibility, storage stability, rheology and aging were investigated. The results indicated that compatibility and storage stability of polymer modified binders were largely dependent on polymer content and were influenced by the characteristics of base bitumens and polymers. Polymer modification increase the elastic response and dynamic moduli of bitumens at intermediate and high temperatures. It also reduced the temperature susceptibility and the glass transition and limiting stiffness temperatures of bitumens. The degree of the improvement generally increased with polymer content, but varied with bitumens source/grade and polymer type. Artificial aging may cause oxidation of bitumen and degradation of polymer, and consequently, change the microstructure and rheological properties of the modified binders. These changes were largely influenced by polymer nature and content. Due to temperature and frequency dependence, aging index is not a suitable parameter for characterization of aging susceptibility of polymer modified binders. The effectiveness of polymer modification as reflected by different testing parameters may vary considerably. The usefulness of empirical test methods (e.g. penetration,, softening point and Fraass breaking point) for characterizing polymer modified bitumens is discussed. To predict significant benefit from polymer modification in practice, it is necessary to use appropriate and fundamental parameters." @default.
- W2245545014 created "2016-06-24" @default.
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- W2245545014 date "1999-01-01" @default.
- W2245545014 modified "2023-09-25" @default.
- W2245545014 title "LABORATORY INVESTIGATIONS OF POLYMER MODIFIED BITUMENS" @default.
- W2245545014 hasPublicationYear "1999" @default.
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