RT Journal Article
T1 Short- and Long-Term Epoxy Modification of Bitumen: Modification Kinetics, Rheological Properties, and Microstructure
A1 Cuadri Vega, Antonio Abad
A1 Delgado Sánchez, Clara
A1 Navarro Domínguez, Francisco Javier
A1 Partal López, Pedro
AB Aiming to gain knowledge in the epoxy-bitumen modification mechanisms, this workexplores the e ects that epoxy concentration and ambient curing exert on the physico-chemistry andthermo-rheological properties of epoxy-modified binders. Process rheokinetics of epoxy-bitumenblends indicates that binder short-term modification (i.e., during processing) is accelerated byepoxy concentration. Furthermore, a synergistic e ect of epoxy concentration and ambient curingis found during long-term modification (i.e., during curing at ambient conditions). As a result,viscous and viscoelastic rheological properties of binders are enhanced at medium/high in-servicetemperatures, at least, after one month of curing. FTIR (Fourier Transform Infrared spectroscopy)tests and SARAs (Saturates, Aromatics, Resins and Asphaltenes) analysis confirm the existence ofesterification/etherification reactions between epoxy oxirane groups and the carbonyl groups availablein aromatic and resin molecules. Thus, the new high molecular weight compounds increase theasphaltenic fraction of modified bitumen. Likewise, nonreversing heat flow curves obtained bymodulated calorimetry corroborate the formation of such highly structured domains responsible forthe final binder performance.
PB MDPI
SN 2073-4360
YR 2020
FD 2020-02
LK http://hdl.handle.net/10272/17912
UL http://hdl.handle.net/10272/17912
LA eng
NO Cuadri Vega, A. A., Delgado Sánchez, C., Navarro  Domínguez, F. J.,  Partal López, P. (2020). Short- and Long-Term Epoxy Modification of Bitumen: Modification Kinetics, Rheological Properties, and Microstructure. Polymers, 12(3), 508. DOI: https://doi.org/10.3390/polym12030508
DS Repositorio Institucional de la Universidad de Huelva
RD 13 jul 2026