A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Nanopolymer Modified Binder on Hot Mix Asphalt
Some of the major distresses in asphalt pavements are high-temperature rutting, low-temperature cracking, and load-associated fatigue cracking. Modifiers can stiffen the binder and provide a more elastic material; therefore, we used elastic polymer (SBS—styrene–butadiene–styrene) and nano TiO2 (titanium dioxide) to modify the PG 58-28 binders. TiO2 nanoparticles were chosen for their potential to accelerate the process of trapping and degrading organic and inorganic particles from the air while removing harmful air pollutants, such as nitrogen oxide (NOx), sulfur oxide (SOx), and volatile organic compounds (VOCs) in the presence of ultraviolet light. Rolling thin film oven (RTFO) and pressure aging vessel (PAV) techniques were used to simulate the binder’s short- and long-term aging. Dynamic shear rheometer (DSR) was used to determine the rheological properties of unaged and short- and long-term aged binders. An optimum TiO2 content in 12% SBS was determined based on binder test results. Hot mix asphalt (HMA) was designed with a virgin binder (control) and a binder modified with SBS and TiO2. A superpave gyratory compactor was used to compact mix specimens. Asphalt pavement analyzer (APA), disk-shaped compact tension (DCT), and semi-circular bend (SCB) tests were used to determine rutting, low-temperature cracking, and fatigue cracking resistance. Our results indicated that the 1 wt.% TiO2+12% SBS modified PG 58-28 binder and corresponding mix performed satisfactorily.
Effect of Nanopolymer Modified Binder on Hot Mix Asphalt
Some of the major distresses in asphalt pavements are high-temperature rutting, low-temperature cracking, and load-associated fatigue cracking. Modifiers can stiffen the binder and provide a more elastic material; therefore, we used elastic polymer (SBS—styrene–butadiene–styrene) and nano TiO2 (titanium dioxide) to modify the PG 58-28 binders. TiO2 nanoparticles were chosen for their potential to accelerate the process of trapping and degrading organic and inorganic particles from the air while removing harmful air pollutants, such as nitrogen oxide (NOx), sulfur oxide (SOx), and volatile organic compounds (VOCs) in the presence of ultraviolet light. Rolling thin film oven (RTFO) and pressure aging vessel (PAV) techniques were used to simulate the binder’s short- and long-term aging. Dynamic shear rheometer (DSR) was used to determine the rheological properties of unaged and short- and long-term aged binders. An optimum TiO2 content in 12% SBS was determined based on binder test results. Hot mix asphalt (HMA) was designed with a virgin binder (control) and a binder modified with SBS and TiO2. A superpave gyratory compactor was used to compact mix specimens. Asphalt pavement analyzer (APA), disk-shaped compact tension (DCT), and semi-circular bend (SCB) tests were used to determine rutting, low-temperature cracking, and fatigue cracking resistance. Our results indicated that the 1 wt.% TiO2+12% SBS modified PG 58-28 binder and corresponding mix performed satisfactorily.
Effect of Nanopolymer Modified Binder on Hot Mix Asphalt
Yazdani, Abolghasem (author) / Gedafa, Daba (author)
International Conference on Transportation and Development 2022 ; 2022 ; Seattle, Washington
2022-08-31
Conference paper
Electronic Resource
English
Effect of Nanopolymer Modified Binder on Hot Mix Asphalt
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