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).


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Mechanism of Crumb Rubber Modifier Dissolution into Asphalt Matrix and Its Effect on Final Physical Properties of Crumb Rubber–Modified Binder


    Additional title:

    Transportation Research Record


    Contributors:


    Publication date :

    2013-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Effect of Crumb Rubber Modifier Dissolution on Storage Stability of Crumb Rubber–Modified Asphalt

    Ghavibazoo, Amir / Abdelrahman, Magdy / Ragab, Mohyeldin | Transportation Research Record | 2013


    Crumb Rubber Modifier (CRM) in Asphalt Pavements

    Ruth, B. E. / Roque, R. / American Society of Civil Engineers et al. | British Library Conference Proceedings | 1995