Effect of Crumb Rubber-Modified Asphalt Properties on its Storage Stability


The current research investigated the effect of the properties of the crumb rubber modified asphalt (CRMA) on its storage stability. This was carried out by investigating the influence of asphalt-crumb rubber modifier (CRM) interaction parameters (interaction time, interaction speed, and interaction temperature) on the CRM activities and how such activities affect the properties of CRMA resulting in changes in its storage stability. The CRM activities were investigated by dissolution tests and thermo gravimetric analysis (TGA) that were carried out on the extracted CRM after interaction with asphalt. The storage stability of the CRMA was carried out on the whole matrix (asphalt+CRM) as well as the liquid phase (asphalt after removal of CRM) of the modified binder. The asphalt-CRM interaction parameters were found to be essential in the modification of the properties of CRMA through controlling the swelling, dissolution and release of CRM components into the asphalt liquid phase. The control of the CRM activities significantly affected the storage stability of CRMA.

Meeting Name

Transportation Research Board 95th Annual Meeting (2016: Jan. 10-14, Washington, DC)


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Asphalt mixtures; Crumb rubber; Properties of materials

Document Type

Article - Conference proceedings

Document Version


File Type





© 2016 Transportation Research Board, All rights reserved.

Publication Date

14 Jan 2016