海角社区 CM, Civil Faculty Published in Top Journal
March 27, 2023
BATON ROUGE, LA 鈥� A paper by a group of 海角社区 Construction Management and 海角社区 Civil Engineering researchers titled, 鈥淪elf-Healing Capability and Mechanical Properties of Asphalt Mixtures Prepared with Light-Activated Polyurethane Prepolymer-Modified Asphalt Binder,鈥� was recently published in the Transportation Research Record.
The publication is one of the most cited and prolific transportation journals in the world.
Authors on the paper included Sharareh Shirzad, assistant professor at Applachian State University and former master鈥檚 and PhD student in construction management at 海角社区; Ipshit Idris, 海角社区 Construction Management PhD student; Marwa Hassan, 海角社区 Construction Management professor; and Louay Mohammad, 海角社区 Civil Engineering professor.
In the paper, the group discusses its research into developing a new generation of ultraviolet (UV) light-activated, self-healing polyurethane prepolymer-modified asphalt binders using a reactive approach. It also sought to optimize production parameters. Rheological tests were conducted on the prepared binder blends to evaluate the effect of the modification on rutting and fatigue cracking. The effect of the modification on asphalt mixtures was also evaluated using a self-healing experiment and various mechanical laboratory tests.
Self-healing testing of the asphalt mixtures showed that mixtures with 10% polymer and continuous exposure to UV light exhibited the highest crack-healing rate. Loaded Wheel Tracking (LWT) results showed an improvement in rutting resistance of the mixtures prepared with polymer. In addition, Semi-Circular Bending (SCB) test results showed an improvement in the cracking resistance with 5% polymer. An increase in high-temperature grade was also observed for the extracted binders from the prepared asphalt mixtures. Multiple Stress Creep Recovery (MSCR) test results of the extracted binders showed an improvement in the elastic behavior and rutting resistance with an increase in polymer content. Furthermore, the extracted binders from aged mixtures showed an improved fatigue performance with the increase in polymer content.
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