Browsing by Author "Ortiz Arias, Domingo Antonio"

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Análisis técnico ambiental del cemento asfáltico modificado con lignina kraft.
    (Universidad de Concepción, 2024) Ortiz Arias, Domingo Antonio; Escribano Leiva, Daniella Eloísa; Schwarz Kusch, Alex
    There is a projected growth in global demand for asphalt, primarily driven by the need to build and maintain roads. However, it is affected by the reduction of asphalt binder due to the development of new technologies in petroleum crude oil refining. Additionally, asphalt-paved roads contribute to greenhouse gas emissions and atmospheric pollutants. To address these environmental problems, research is being conducted into the use of renewable materials such as lignin, a byproduct of the paper industry, as a partial substitute for bitumen. The objective of this research was to analyze the mechanical behavior of asphalt mixture modified with lignin, as well as to evaluate its potential for reducing environmental impact. This serves as a potential competitive alternative to traditional asphalt mixture in paving. To achieve this, a modified binder was experimentally designed using different percentages of lignin. Subsequently, the design of the modified asphalt mixture was developed, and the pavement was evaluated from a structural perspective. Finally, this modified paving alternative was compared with traditional paving from an environmental impact standpoint. Life cycle analysis was used to assess the environmental impact of each paving alternative. The results revealed that the binder modified with different percentages of lignin experienced an increase in its kinematic viscosity and a decrease in ductility. However, in none of the cases was the specified minimum achieved, thus suggesting a 0.5% lignin replacement percentage. On the other hand, the asphalt mixture designed with the modified binder demonstrated higher stability and density compared to a traditional mixture. This finding implies that the modified mixture requires a lesser thickness to provide equivalent support capacity, resulting in reduced material consumption and transportation volumes. Regarding the environmental impact analysis, a reduction in environmental impact was observed in most of the evaluated categories. Particularly noteworthy is a 0.8% decrease in greenhouse gas emissions and an average 5% reduction in environmental impact categories.
Síguenos en...