A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of synthesized warm mix additive and rejuvenator on performance of recycled warm asphalt mixtures
https://orcid.org/0000-0002-6063-6188
Abstract In this study, a warm mix additive (composed of diamine and fatty acid amine) and a rejuvenator (consisting of styrene-butadiene-styrene and aromatic elements) were synthesized to facilitate the incorporation of 50% recycled asphalt pavement (RAP) in warm mix asphalt for the surface layer and 100% RAP in cold asphalt mixtures for the base layer. The effect of WMA and rejuvenator-modified asphalt binder was performed through rotation viscosity, dynamic shear rheometer, and bending beam rheometer. Simultaneously, the performances of RAP-modified asphalt mixtures were assessed using dynamic modulus, overlay test, and flow number test. Constructing two testbed roads provided a real-world evaluation of two surface mixtures and two base mixtures. The results indicated that modifying asphalt binder PG 64–22 with 2.0% warm mix additive (WMA) and 5.0% rejuvenator upgraded the performance grade to PG 76–22, significantly improving rutting resistance, and reducing 40% creep stiffness. The asphalt mixture with 50% RAP, modified with WMA and rejuvenator, demonstrated a better resistance to rutting and low-temperature cracking compared to the original mixture. Both surface and base mixtures met field application specifications, exhibiting excellent performance after a year of service, as confirmed by pavement condition surveys, and falling weight deflectometer tests, thus highlighting the potential for sustainable and high-performance recycled asphalt solutions in road construction.
Highlights New warm mix additive and rejuvenator enhance RAP use by up to 50% at lower temperatures (145℃ mixing, 120℃ compaction). Synthesized additives modified binder improved resistance to rutting and reduced susceptibility to low-temperature cracking. Asphalt mix with developed additive exhibits superior tensile & indirect strength in testbed. Base mixture with cement and acrylic polymer emulsion, exhibits good workability and reduced deflection.
Effect of synthesized warm mix additive and rejuvenator on performance of recycled warm asphalt mixtures
https://orcid.org/0000-0002-6063-6188
Abstract In this study, a warm mix additive (composed of diamine and fatty acid amine) and a rejuvenator (consisting of styrene-butadiene-styrene and aromatic elements) were synthesized to facilitate the incorporation of 50% recycled asphalt pavement (RAP) in warm mix asphalt for the surface layer and 100% RAP in cold asphalt mixtures for the base layer. The effect of WMA and rejuvenator-modified asphalt binder was performed through rotation viscosity, dynamic shear rheometer, and bending beam rheometer. Simultaneously, the performances of RAP-modified asphalt mixtures were assessed using dynamic modulus, overlay test, and flow number test. Constructing two testbed roads provided a real-world evaluation of two surface mixtures and two base mixtures. The results indicated that modifying asphalt binder PG 64–22 with 2.0% warm mix additive (WMA) and 5.0% rejuvenator upgraded the performance grade to PG 76–22, significantly improving rutting resistance, and reducing 40% creep stiffness. The asphalt mixture with 50% RAP, modified with WMA and rejuvenator, demonstrated a better resistance to rutting and low-temperature cracking compared to the original mixture. Both surface and base mixtures met field application specifications, exhibiting excellent performance after a year of service, as confirmed by pavement condition surveys, and falling weight deflectometer tests, thus highlighting the potential for sustainable and high-performance recycled asphalt solutions in road construction.
Highlights New warm mix additive and rejuvenator enhance RAP use by up to 50% at lower temperatures (145℃ mixing, 120℃ compaction). Synthesized additives modified binder improved resistance to rutting and reduced susceptibility to low-temperature cracking. Asphalt mix with developed additive exhibits superior tensile & indirect strength in testbed. Base mixture with cement and acrylic polymer emulsion, exhibits good workability and reduced deflection.
Effect of synthesized warm mix additive and rejuvenator on performance of recycled warm asphalt mixtures
https://orcid.org/0000-0002-6063-6188
Abstract In this study, a warm mix additive (composed of diamine and fatty acid amine) and a rejuvenator (consisting of styrene-butadiene-styrene and aromatic elements) were synthesized to facilitate the incorporation of 50% recycled asphalt pavement (RAP) in warm mix asphalt for the surface layer and 100% RAP in cold asphalt mixtures for the base layer. The effect of WMA and rejuvenator-modified asphalt binder was performed through rotation viscosity, dynamic shear rheometer, and bending beam rheometer. Simultaneously, the performances of RAP-modified asphalt mixtures were assessed using dynamic modulus, overlay test, and flow number test. Constructing two testbed roads provided a real-world evaluation of two surface mixtures and two base mixtures. The results indicated that modifying asphalt binder PG 64–22 with 2.0% warm mix additive (WMA) and 5.0% rejuvenator upgraded the performance grade to PG 76–22, significantly improving rutting resistance, and reducing 40% creep stiffness. The asphalt mixture with 50% RAP, modified with WMA and rejuvenator, demonstrated a better resistance to rutting and low-temperature cracking compared to the original mixture. Both surface and base mixtures met field application specifications, exhibiting excellent performance after a year of service, as confirmed by pavement condition surveys, and falling weight deflectometer tests, thus highlighting the potential for sustainable and high-performance recycled asphalt solutions in road construction.
Highlights New warm mix additive and rejuvenator enhance RAP use by up to 50% at lower temperatures (145℃ mixing, 120℃ compaction). Synthesized additives modified binder improved resistance to rutting and reduced susceptibility to low-temperature cracking. Asphalt mix with developed additive exhibits superior tensile & indirect strength in testbed. Base mixture with cement and acrylic polymer emulsion, exhibits good workability and reduced deflection.
Effect of synthesized warm mix additive and rejuvenator on performance of recycled warm asphalt mixtures
Phan, Tam Minh (author) / Choi, Yu-Seung (author) / Youn, Sang-Hyeok (author) / Park, Dae-Wook (author)
2024-03-07
Article (Journal)
Electronic Resource
English
Warm mix additive , Rejuvenator , RAP , SBS , FWD
Laboratory performance of warm mix asphalt containing recycled asphalt mixtures
| British Library Online Contents | 2014
Laboratory performance of warm mix asphalt containing recycled asphalt mixtures
| Online Contents | 2014