Print Email Facebook Twitter Chemical and Oxidative Controlled Hardening of Epoxy-Modified Bitumen Title Chemical and Oxidative Controlled Hardening of Epoxy-Modified Bitumen Author Apostolidis, P. (TU Delft Pavement Engineering) Liu, X. (TU Delft Pavement Engineering) Zhang, M (Southeast University) van de Ven, Martin (TU Delft Pavement Engineering) Erkens, S. (TU Delft Pavement Engineering) Scarpas, Athanasios (TU Delft Pavement Engineering; Khalifa University of Science and Technology) Date 2019 Abstract The addition of epoxy modifier in bitumen is a relatively new modification technology (1-4) and the most critical epoxy polymerization-induced changes of the epoxy-bituminous materials are not fully understood. Different phenomena take place when epoxy modifiers are incorporated into bitumen and they are dependent on the material hardening conditions. Temperature is one of the most crucial parameters that influences to the development of physical, chemical and mechanical characteristics at the early life (curing or chemical hardening - CH) (5-7) and long-term service (oxidative hardening - OH) (4) of epoxy-modified binders. For this reason, in-depth exploration of epoxy chemistry in bitumen is needed to understand the evolution of the properties of these binders in time. Within this framework, the chemical compounds and their reaction products generated under various conditions were studied to reveal the time dependency of molecular microstructures of modified binders. Special attention was given to the evaluation of physiochemical characteristics and the mechanical properties of epoxy-bituminous binders, concluding that the degree of CH and OH was dependent on the level of epoxy modification in bitumen. It was observed that the sulfoxide compounds are the most representative index for assessing the age hardening of epoxy-modified bitumens. Finally, the enhanced resistance against environmental aging in combination with the superior mechanical characteristics (i.e., higher tensile strength, flexibility and enhanced longevity) when the epoxy modification is implemented in bitumen promises a very effective technology for developing long-lasting pavement materials. To reference this document use: http://resolver.tudelft.nl/uuid:d463c89b-a1a9-4d73-913b-e39216853d61 Publisher Transportation Research Board (TRB) Source Proceedings of 2019 TRB Annual Meeting: 13-17 Januari 2019, Washington, USA Event Transportation Research Board 98th Annual Meeting, 2019-01-13 → 2019-01-17, Walter E. Washington Convention Center, Washington D.C., United States Part of collection Institutional Repository Document type conference paper Rights © 2019 P. Apostolidis, X. Liu, M Zhang, Martin van de Ven, S. Erkens, Athanasios Scarpas Files PDF TRB2019_binder_Xabstract.pdf 666.08 KB Close viewer /islandora/object/uuid:d463c89b-a1a9-4d73-913b-e39216853d61/datastream/OBJ/view