Análise da estrutura interna de misturas asfálticas

• Autor(a) principal: Vasconcelos, Kamilla Lima
• Data de Publicação: 2005
• Outros Autores: Evangelista Junior, Francisco, Soares, Jorge Barbosa
• Tipo de documento: Artigo de conferência
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/69432
• topic: Engenharia de transportes

Asphalt mixtures are heterogeneous materials consisting of aggregates, air voids, and asphalt. The arrangement of the aggregate particles in terms of spatial distribution, directional distribution and contact points is referred as the aggregate skeleton. The internal structure distribution is the result of proportions and properties of materials as well as a function of the compaction method. Differences in the properties of a same mixture, compacted by different methods, can be related to differences on its structure, mostly on the distribution and orientation of the coarse aggregates. This work used the Imagetool program to analyze the internal structure of three different Hot Mix Asphalts (HMA), compacted with the Superpave Gyratory Compactor (SGC) and the Marshall compactor. The analysis of the mixtures was performed through three parameters: (i) vector magnitude; (ii) average angle of inclination from the horizontal; and (iii) uniformity in the spatial distribution of the aggregates. The analyses show more uniforms distributions for shorter aggregates particles without difference between the design methodologies. It is also observed that particles longer than ⅜” have an important role in the concentration of the aggregates inside the overall mixture.