01501107

Component

https://doi.org/10.3141/2370-12

http://scholar.google.com...agab&publication_year=2013

Modification of asphalt by crumb rubber modifier (CRM) is mostly done through exchange of components between asphalt and CRM. At 160°C and 10 Hz, CRM absorbs aromatics of asphalt and swells; however, at 220°C and 50 Hz, CRM dissolves into the asphalt; this process leads to the release of different components of CRM including carbon black, fillers, and polymeric and oily components. Depending on interaction conditions, CRM dissolution is performed differently, and therefore the state and role of the released components can be different. In this research different mechanisms of dissolution of one size of CRM in asphalt matrix and their effects on property development of modified asphalt were studied by using different analytic techniques, including dissolution test, dynamic shear rheometer (DSR), thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR) spectroscopy. Dissolution test results in combination with DSR results indicate the state and the role of CRM particles in the matrix, while TGA and FTIR spectroscopy show the type and amount of released components from CRM. The results reveal that for the materials used in this study interaction temperature is the main factor affecting the mechanism of dissolution of the CRM particles and consequently defines the role of the released components of CRM in asphalt matrix. DSR results indicate that during interactions at 190°C (intermediate interaction temperature), released components are more effective on physical properties of asphalt than are released components during interactions at 220°C (high interaction temperature).

01500280

13-4259

English

pp 92-101

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309286886

Print

Figures (6) ; References (15) ; Tables (1)

Asphalt mixtures; Asphalt pavements; Bituminous binders; Crumb rubber; Dissolution; Fillers (Materials); Fourier transforms; Physical properties; Rheometers; Thermogravimetric analysis

Dynamic shear rheometry

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Feb 5 2013 12:49PM

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• Critical Problems with Using the Asphalt Ductility Test as a Performance Index for Modified Binders
• Effect of Crumb Rubber Modifier Dissolution on Storage Stability of Crumb Rubber–Modified Asphalt
• Effectiveness of Antistrip Agents in Asphalt Mixtures
• Evaluation of Low-Temperature Properties of Asphalt Binders and Mixtures
• Evaluation of Rejuvenator’s Effectiveness with Conventional Mix Testing for 100% Reclaimed Asphalt Pavement Mixtures
• Evolution of the Crossover Modulus with Oxidative Aging: Method to Estimate Change in Viscoelastic Properties of Asphalt Binder with Time and Depth on the Road
• Experimental Evaluation of Shear Resistance of Improved Steel–Asphalt Interfaces
• First Observation of Blending-Zone Morphology at Interface of Reclaimed Asphalt Binder and Virgin Bitumen
• Linear and Nonlinear Viscoelastic Analysis of Bituminous Mortar
• Low-Temperature Oxidation Kinetics of Asphalt Binders
• Quality and Durability of Warm Rubberized Asphalt Cement in Ontario, Canada
• Recovery and Laboratory Testing of Asphalt Emulsion Residue: Application of Simple Aging Test and 4-mm Dynamic Shear Rheometer Test
• Recycled Asphalt Shingle Binder Characterization and Blending with Virgin Binders
• Revision and Further Validation of Surface Performance-Graded Specification for Chip Seal Binders
• Significance of Mixture Parameters on Binder Aging in Hot-Mix Asphalt Mixtures
• Simplification of Linear Amplitude Sweep Test and Specification Parameter