Behavior of thermally treated kaolin filler in an asphalt concrete mixture

Bryan Felmawer Marín-García; Hugo Alexander Rondón Quintana; Omar Javier Jiménez-Jiménez

doi:10.22335/rlct.v11i3.861

Autores

Bryan Felmawer Marín-García Universidad Pedagógica y Tecnológica de Colombia
Hugo Alexander Rondón Quintana Universidad Distrital Fancisco José de Caldas
Omar Javier Jiménez-Jiménez Universidad Pedagógica y Tecnológica de Colombia https://orcid.org/0000-0002-7309-5085

DOI:

https://doi.org/10.22335/rlct.v11i3.861

Palavras-chave:

Caulim, fíler, tratamento térmico, mistura asfáltica quente

Resumo

No presente estudo, um caulim de origem industrial foi submetido a altas temperaturas por 1 e 2 horas, a fim de eliminar suas propriedades de plasticidade e expansão. Este caulim tratado termicamente (KT) foi utilizado para avaliar sua possível utilização como substituto de um fíler de origem natural em uma mistura asfáltica quente. Testes de resistência Marshall e tração indireta foram realizados
para avaliar a resposta das misturas. Testes de difratometria de raios X (DRX) e fluorescência de raios X (XRF) foram realizados no caulim (com e sem tratamento térmico). O efeito da temperatura e tempo de exposição nos índices de penetração (PI) e expansão livre (FSI) do KT também é apresentado. Como conclusão geral, um aumento na resistência Marshall e dano por umidade é obtido quando o fíler natural é completamente substituído pelo KT. Em contraste com o acima exposto, se
o caulim é utilizado sem tratamento térmico (K), as referidas resistências diminuem ostensivamente, principalmente na presença de água.

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Biografia do Autor

Bryan Felmawer Marín-García, Universidad Pedagógica y Tecnológica de Colombia

Investigador GIISAG
Hugo Alexander Rondón Quintana, Universidad Distrital Fancisco José de Caldas

Profesor Titular - Facultad del Medio Ambiente y Recursos Naturales
Omar Javier Jiménez-Jiménez, Universidad Pedagógica y Tecnológica de Colombia

Investigador del GIISAG. Maestría en Ingeniería.

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