Researchers globally emphasize sustainability to conserve resources, protect the environment, and support future generations. Sustainable practices address climate change, foster economic stability, and enhance quality of life. This study aligns with sustainable development goals (SDG 9, SDG 12, and SDG 13) relevant to road infrastructure. The study aims to minimize the use of natural aggregates in asphalt pavement construction by increasing pavement service life. It also seeks to address climate change by lowering construction temperatures by 2040 °C. This is achieved using environmentally friendly warm mix asphalt (WMA) additives. The additives include Sasobit (1.5%), Rediset (1.5%), Redux (0.5%), and Evotherm (0.4%). Modified binders are evaluated for basic tests like penetration, softening, ductility, absolute viscosity, and kinematic viscosity. Further these modified binders are used for preparing stone matrix asphalt mixture (SMA) and are evaluated for desired volumetrics and strength properties. Results concluded that penetration value increased with addition of Rediset, Redux, and Evotherm, but decreased with addition of Sasobit. Softening point of Sasobit modified bitumen had higher value compared to control bitumen and bitumen modified with other WMA additives. Ductility value was observed to be lower in all modified bitumen when compared with control bitumen. Absolute viscosity value increased for Sasobit modified bitumen and for all other modified including control bitumen was less than Sasobit modified bitumen. The volumetrics of SMA (13 mm NMAS) prepared from above mentioned WMA modified binders are compared with samples prepared with control bitumen. Desired range of volumetrics and strength parameters are achieved showing that use of WMA additives can be effecting in reducing the construction temperature (20°–40°) yet achieving desired properties. Slight decrease in stability was observed in case of DBM grade 2 bituminous mix.

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Integrating Warm Mix Asphalt and Stone Matrix Asphalt for Enhanced Environmental Sustainability and Efficient Asphalt Construction Practices

  • N. Darshan,
  • Shubham Suryawanshi,
  • Aniket V. Kataware

摘要

Researchers globally emphasize sustainability to conserve resources, protect the environment, and support future generations. Sustainable practices address climate change, foster economic stability, and enhance quality of life. This study aligns with sustainable development goals (SDG 9, SDG 12, and SDG 13) relevant to road infrastructure. The study aims to minimize the use of natural aggregates in asphalt pavement construction by increasing pavement service life. It also seeks to address climate change by lowering construction temperatures by 2040 °C. This is achieved using environmentally friendly warm mix asphalt (WMA) additives. The additives include Sasobit (1.5%), Rediset (1.5%), Redux (0.5%), and Evotherm (0.4%). Modified binders are evaluated for basic tests like penetration, softening, ductility, absolute viscosity, and kinematic viscosity. Further these modified binders are used for preparing stone matrix asphalt mixture (SMA) and are evaluated for desired volumetrics and strength properties. Results concluded that penetration value increased with addition of Rediset, Redux, and Evotherm, but decreased with addition of Sasobit. Softening point of Sasobit modified bitumen had higher value compared to control bitumen and bitumen modified with other WMA additives. Ductility value was observed to be lower in all modified bitumen when compared with control bitumen. Absolute viscosity value increased for Sasobit modified bitumen and for all other modified including control bitumen was less than Sasobit modified bitumen. The volumetrics of SMA (13 mm NMAS) prepared from above mentioned WMA modified binders are compared with samples prepared with control bitumen. Desired range of volumetrics and strength parameters are achieved showing that use of WMA additives can be effecting in reducing the construction temperature (20°–40°) yet achieving desired properties. Slight decrease in stability was observed in case of DBM grade 2 bituminous mix.