Química

URI permanente para esta colección

https://hdl.handle.net/10669/281

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Examinando Química por Autor "Aguiar Moya, José Pablo"

Mostrando 1 - 2 de 2
  • Miniatura
    Ítem
    Influence of bitumen and aggregate polarity on interfacial adhesion
    (2017) Baldi Sevilla, Alejandra; Montero Villalobos, Mavis Lili; Aguiar Moya, José Pablo; Loría Salazar, Luis Guillermo; Bhasin, Amit
    The quality of the bitumen–aggregate interface formed in an asphalt mixture is dictated by the physicochemical properties of both materials, such as surface polarity. In order to better understand the role of polarity on interfacial adhesion between bitumen and aggregate, a systematic study was conducted by designing bitumens with different polarities. These bitumens were produced by the addition of diatoms and hydrophobic diatoms in varying concentrations. It was found that by manipulating the polarity of bitumen it is possible to design materials that result in bitumen–aggregate pairs that are more compatible with each other and resistant to debonding. On the other hand, basicity of aggregates is also highly related to obtaining asphalt mixtures with improved durability. The findings from this paper help advance the fundamental understanding of the adhesive behaviour between bitumens and aggregates. More importantly, these findings can be used to design optimal anti-strip agents for using in different asphalt mixtures.
  • Miniatura
    Ítem
    Influence of nanosilica and diatomite on the physicochemical and mechanical properties of binder at unaged and oxidized conditions
    (2016) Baldi Sevilla, Alejandra; Montero Villalobos, Mavis Lili; Aguiar Moya, José Pablo; Loría Salazar, Luis Guillermo
    Modification of binders helps address common distresses in pavements by changing their essential properties. In order to further characterize the role of additives in these changes, a set of nanosilica and diatomite modified binders was analyzed to evaluate the performance under unaged and oxidized conditions. The results suggest that the mechanical and physicochemical behavior exhibited by binders is defined by the chemical interactions occurring within the material (cohesion). This study allowed understanding the chemical transformations occurring in the binder after modification and aging. Therefore, the results advance the achievement of materials with improved and engineered properties.