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Rheological Investigation of Soft Grade Asphalt Binder Modified With Crumb Rubber-Nanosilica Composite
This study aims at investigating the effect of using nanosilica (NS) as a modifier for Crumb rubber (CR) modified asphalt binder. In this study, the concentration of CR was kept constant as 12% (wt of base binder) and the nanosilica concentration was varied from 1% to 6%. The effect of varying concentrations (1, 2, 3, 4, 4.5, 5 and 6%) of nanosilica (by weight of binder) on CR modified binder were evaluated by utilizing various physical tests like penetration, softening point, and ductility. The rotational viscosity (RV) and dynamic shear rheometer (DSR) tests were used to analyze rheological properties of base binder and nanosilica polymer modified asphalt binder. In addition, the performance of modified asphalt after thin film oven (TFO) (short-term aging) and Pressure aging Vessel (PAV) test (long term aging) were assessed as well. Furthermore, the storage stability of modified asphalt binder was evaluated. Results showed that the addition of nanosilica has a positive effect on rutting performance of CR modified asphalt binders. Storage stability of the CR modified asphalt binders improved significantly after the addition of nanosilica. Using softening point and rheological parameters (complex modulus (G*) and phase angle (δ), the best values were possessed by 12% CR-4% NS modified binder. During rheological characterization, it was found that complex modulus increases, phase angle decreases, superpave rutting parameter increases and failure temperature increases with increasing nanosilica content. It was also found that Brookfield viscosity increases with increasing nanosilica concentration as the binder becomes stiffer. All the test results confirmed the fact that the crumb rubber-nanosilica modifier is effective in enhancing the high temperature properties (rutting resistance) of the soft grade binders and at the same time, it increases the elasticity of the binders.
Rheological Investigation of Soft Grade Asphalt Binder Modified With Crumb Rubber-Nanosilica Composite
This study aims at investigating the effect of using nanosilica (NS) as a modifier for Crumb rubber (CR) modified asphalt binder. In this study, the concentration of CR was kept constant as 12% (wt of base binder) and the nanosilica concentration was varied from 1% to 6%. The effect of varying concentrations (1, 2, 3, 4, 4.5, 5 and 6%) of nanosilica (by weight of binder) on CR modified binder were evaluated by utilizing various physical tests like penetration, softening point, and ductility. The rotational viscosity (RV) and dynamic shear rheometer (DSR) tests were used to analyze rheological properties of base binder and nanosilica polymer modified asphalt binder. In addition, the performance of modified asphalt after thin film oven (TFO) (short-term aging) and Pressure aging Vessel (PAV) test (long term aging) were assessed as well. Furthermore, the storage stability of modified asphalt binder was evaluated. Results showed that the addition of nanosilica has a positive effect on rutting performance of CR modified asphalt binders. Storage stability of the CR modified asphalt binders improved significantly after the addition of nanosilica. Using softening point and rheological parameters (complex modulus (G*) and phase angle (δ), the best values were possessed by 12% CR-4% NS modified binder. During rheological characterization, it was found that complex modulus increases, phase angle decreases, superpave rutting parameter increases and failure temperature increases with increasing nanosilica content. It was also found that Brookfield viscosity increases with increasing nanosilica concentration as the binder becomes stiffer. All the test results confirmed the fact that the crumb rubber-nanosilica modifier is effective in enhancing the high temperature properties (rutting resistance) of the soft grade binders and at the same time, it increases the elasticity of the binders.
Rheological Investigation of Soft Grade Asphalt Binder Modified With Crumb Rubber-Nanosilica Composite
Lecture Notes in Civil Engineering
Singh, Dharamveer (editor) / Maji, Avijit (editor) / Karmarkar, Omkar (editor) / Gupta, Monik (editor) / Velaga, Nagendra Rao (editor) / Debbarma, Solomon (editor) / Mehraj, Tabish (author) / Mir, Mohammad Shafi (author) / Mohanty, Bijayananda (author)
International Conference on Transportation Planning and Implementation Methodologies for Developing Countries ; 2022 ; Mumbai, India
2023-12-19
21 pages
Article/Chapter (Book)
Electronic Resource
English
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