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Mechanical Assessment of a Warm Mix Asphalt (wma) Using Additives Viscosity Modifiers

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Slebi Acevedo, Carlos José
Zuluaga Astudillo, Daniel Alberto
Gutiérrez Melgarejo, Rafael
Abstract (Spanish)
La tecnología de mezcla asfáltica tibia (wma) ha sido un incentivo en la industria asfáltica ya que contribuye a minimizar las emisiones de gases de efecto invernadero al medio ambiente, ayudando a reducir el calentamiento global y la huella de carbono. En esta investigación se evaluó experimentalmente el impacto de dos aditivos wma sobre las características del ligante asfáltico y la mezcla asfáltica. Entre los resultados, se destacó el impacto de los aditivos en la propiedad de viscosidad del ligante asfáltico. Ambos aditivos redujeron la viscosidad a medida que aumentaba la temperatura en la mezcla. Con respecto a las mezclas asfálticas, la adición de aditivos wma tendió a aumentar la densidad aparente, los vacíos llenos de asfalto, la estabilidad Marshall y a reducir el contenido de vacíos de aire. La incorporación de estos aditivos puede reducir entre un 0.2 y un 0.4% el contenido óptimo de betún.
Abstract (English)
Warm Mix Asphalt (wma) technology has been a driving force in the asphalt industry, as it contributes to minimizing greenhouse gas emissions in the environment, aiding in the reduction of global warming and carbon footprint. In this research, the impact of two wma additives on the characteristics of asphalt binder and asphalt mixture was experimentally assessed. Among the results, a notable impact of additives was observed on the viscosity property of the asphalt binder. Both additives reduce viscosity as the temperature in the mixture increased. Concerning asphalt mixtures, the addition of wma additives tended to increase bulk density, voids filled with asphalt, Marshall stability, and reduce air voids content. The incorporation of these additives can lead to a reduction of 0.2 to 0.4% in the optimal bitumen content.
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13 p.
URI: https://repositorio.escuelaing.edu.co/handle/001/3488
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AN - Grupo de Investigación en Geotecnia
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