Print Email Facebook Twitter Rheological Behavior and Its Chemical Interpretation of Crumb Rubber Modified Asphalt Containing Warm-Mix Additives Title Rheological Behavior and Its Chemical Interpretation of Crumb Rubber Modified Asphalt Containing Warm-Mix Additives Author Wang, H. (TU Delft Pavement Engineering) Liu, X. (TU Delft Pavement Engineering) Apostolidis, P. (TU Delft Pavement Engineering) Scarpas, Athanasios (TU Delft Pavement Engineering; Khalifa University of Science and Technology) Date 2018 Abstract The microstructure and chemical composition of asphalt binders have a significant effect on their rheological properties and, therefore, their performance as road paving binders. This study aims to investigate the effects of warm-mix asphalt (WMA) additives, organic type and chemical type, on the rheological properties and chemical internal structure of base asphalt and crumb rubber modified asphalt (CRMA). A set of dynamic shear rheometer (DSR) tests was conducted to obtain the rheological parameters (e.g., complex viscosity, complex modulus, phase angle) of asphalt binders. The flow activation energy wascalculated from Arrhenius equation based on viscosity data to rank the thermal susceptibility. Black diagrams and master curves of complex modulus and phase angle were utilized to analyze the rheological properties. The molecular weight distributions of asphalt binders were inverted from the phase angle master curve to evaluate the molecular weight characteristics. It was found that the the addition of crumb rubber into base asphalt improves the rheological properties of enhanced modulus and elasticity. Organic and chemical types of WMA additives have different chemo-physical effects on both base asphalt and CRMA. Phase angle inversion method provides a powerful tool to monitor the molecular structure change and, therefore, the chemo-physical interactions of asphalt binders induced by modifications. Finally, there is a good correlation betweenflow activation energy and molecular weight To reference this document use: http://resolver.tudelft.nl/uuid:17f29ac9-95d6-4ed3-a70b-3ca326ffbe88 DOI https://doi.org/10.1177/0361198118781376 ISSN 0361-1981 Source Transportation Research Record, 2672 (28), 337–348 Part of collection Institutional Repository Document type journal article Rights © 2018 H. Wang, X. Liu, P. Apostolidis, Athanasios Scarpas Files PDF 0361198118781376.pdf 1.11 MB Close viewer /islandora/object/uuid:17f29ac9-95d6-4ed3-a70b-3ca326ffbe88/datastream/OBJ/view