Mystery of Asphalt Enigma
In a groundbreaking study, researchers from the Institut für Materialchemie at the Technische Universität Wien have offered a fresh understanding of the bitumen aging process. The study, conducted by Dr. Ayse N. Koyun and Univ.Prof. Hinrich Grothe, was published in the prestigious scientific journal Scientific Reports on June 29.
The research focused on investigating the chemical composition of bitumen and its effect on the aging process. Using three different methods – Atomic Force Microscopy-Infrared Spectroscopy (AFM-IR), Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS), and fluorescence microscopy – the team led by Dr. Koyun and Prof. Grothe discovered the formation of core-shell particles on the surface of bitumen. These particles, consisting of at least two different components, are a significant finding that could help in understanding the oxidation behavior of bitumen and finding measures to prevent atmospheric aging.
When bitumen cools, it solidifies, and individual molecules arrange themselves in characteristic patterns. At hot temperatures, larger chemical compounds in bitumen move freely. This consistency of bitumen depends largely on temperature, a factor that plays a crucial role in its aging process.
Understanding the aging process of bitumen is crucial as it is primarily used for the production of asphalt, a common material used in road construction. The study's results may help in finding measures to prevent atmospheric aging of bitumen, ensuring the durability and longevity of roads and other infrastructure.
The combination of AFM-IR, ToF-SIMS, and fluorescence microscopy methods provided valuable insights into the multiphase nature of the bitumen surface. The study's DOI is 10.1038/s41598-021-92835-3.
The study by Dr. Ayse Koyun offers a significant step forward in understanding the aging process of bitumen, paving the way for future research and potential solutions to prevent its degradation.
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