Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bitumen modifiers for reduced temperature asphalts: a comparative analysis between three polymeric and non-polymeric additives
This study presents three bitumen modifiers which may find successful application in the fabrication of binders for warm mix asphalt in the paving industry. In that sense, two non-polymeric additives, thiourea and thiourea dioxide, along with a reactive isocyanate-terminated prepolymer have been evaluated. Viscous flow and linear viscoelasticity tests, at 60 ºC, reveal bituminous modified binders which evolve towards highly viscous materials when subjected to ambient curing. However, at 135 ºC, they show lower viscosity than a typical 3 wt.% SBS binder used as reference. These results suggest modified binders with low viscosity which may contribute to reduce the mix asphalt temperature. On the contrary, they are expected to undergo an important increase in viscosity when the asphalt is in service, which would contribute to improve further their performance. Low temperature performance and effects of short-term and long-term aging were not considered in this study. ; This work is part of a research project sponsored by a MEC-FEDER Programme of references BES-2008-003572 and AP2008-01419, supported by European Social Fund. The authors gratefully acknowledge its financial support. ; Ingeniería Química, Química Física y Ciencias de los Materiales
Bitumen modifiers for reduced temperature asphalts: a comparative analysis between three polymeric and non-polymeric additives
This study presents three bitumen modifiers which may find successful application in the fabrication of binders for warm mix asphalt in the paving industry. In that sense, two non-polymeric additives, thiourea and thiourea dioxide, along with a reactive isocyanate-terminated prepolymer have been evaluated. Viscous flow and linear viscoelasticity tests, at 60 ºC, reveal bituminous modified binders which evolve towards highly viscous materials when subjected to ambient curing. However, at 135 ºC, they show lower viscosity than a typical 3 wt.% SBS binder used as reference. These results suggest modified binders with low viscosity which may contribute to reduce the mix asphalt temperature. On the contrary, they are expected to undergo an important increase in viscosity when the asphalt is in service, which would contribute to improve further their performance. Low temperature performance and effects of short-term and long-term aging were not considered in this study. ; This work is part of a research project sponsored by a MEC-FEDER Programme of references BES-2008-003572 and AP2008-01419, supported by European Social Fund. The authors gratefully acknowledge its financial support. ; Ingeniería Química, Química Física y Ciencias de los Materiales
Bitumen modifiers for reduced temperature asphalts: a comparative analysis between three polymeric and non-polymeric additives
Cuadri Vega, Antonio Abad (Autor:in) / Carrera Páez, Virginia (Autor:in) / Izquierdo Rodríguez, María Ángeles (Autor:in) / García Morales, Moisés (Autor:in) / Navarro Domínguez, Francisco Javier (Autor:in)
01.01.2014
doi:10.1016/j.conbuildmat.2013.11.009
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
624
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