Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Soy-based rejuvenated asphalt binders: Impact on rheological properties and chemical aging indices
Highlights The soy-based bio-oils showed great potential to be used as rejuvenating agents. The rejuvenators improved the binder ductility and relaxation properties. The fatigue life at 1% strain is longer for the binders rejuvenated with bio-oils. The fatigue factors are higher for the rejuvenated binders than for the neat ones. The carbonyl indices reduced with rejuvenation but not to the virgin binder level.
Abstract The main purpose of this study is to evaluate the performance of four recycling agents – one conventional petroleum-based (PB) oil and three soy-based (SB) bio-oils – in terms of rutting, fatigue and thermal cracking behavior and chemical properties of the rejuvenated asphalt binders. The PG grade was used to assess the high and low critical temperatures, and the MSCR and LAS tests were used to evaluate the rutting and fatigue characteristics, respectively. Changes in the chemical aging groups were tracked by means of FTIR spectroscopy. The bio-oils have great potential to be employed as recycling agents as they restored the high and low critical temperatures of the aged binders. The bio-rejuvenated binders presented an excessive mass loss compared to the standard rejuvenated one despite their enhancement in the fatigue life. The carbonyl indices were reduced, showing that the rejuvenators were capable of mitigating the effect of binder aging.
Soy-based rejuvenated asphalt binders: Impact on rheological properties and chemical aging indices
Highlights The soy-based bio-oils showed great potential to be used as rejuvenating agents. The rejuvenators improved the binder ductility and relaxation properties. The fatigue life at 1% strain is longer for the binders rejuvenated with bio-oils. The fatigue factors are higher for the rejuvenated binders than for the neat ones. The carbonyl indices reduced with rejuvenation but not to the virgin binder level.
Abstract The main purpose of this study is to evaluate the performance of four recycling agents – one conventional petroleum-based (PB) oil and three soy-based (SB) bio-oils – in terms of rutting, fatigue and thermal cracking behavior and chemical properties of the rejuvenated asphalt binders. The PG grade was used to assess the high and low critical temperatures, and the MSCR and LAS tests were used to evaluate the rutting and fatigue characteristics, respectively. Changes in the chemical aging groups were tracked by means of FTIR spectroscopy. The bio-oils have great potential to be employed as recycling agents as they restored the high and low critical temperatures of the aged binders. The bio-rejuvenated binders presented an excessive mass loss compared to the standard rejuvenated one despite their enhancement in the fatigue life. The carbonyl indices were reduced, showing that the rejuvenators were capable of mitigating the effect of binder aging.
Soy-based rejuvenated asphalt binders: Impact on rheological properties and chemical aging indices
Santos, Felipe Brandão (Autor:in) / Faxina, Adalberto Leandro (Autor:in) / Soares, Sandra de Aguiar (Autor:in)
10.07.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Thermal, microscopic, and rheological characterization of rejuvenated asphalt binders
| Springer Verlag | 2022
| British Library Online Contents | 2014
Thermal, microscopic, and rheological characterization of rejuvenated asphalt binders
| Online Contents | 2022