Influence of four non-conventional additives on the physical, rheological and thermal properties of an asphalt

This article shows the evaluation of the influence of two polymer wastes (crumb rubber – GCR and low density polyethylene – LDPE), a natural bitumen (Gilsonite - G) and a chemical component (Husil) about the physical, rheological and thermal properties of an asphalt cement (AC 60/70 penetration grade). Over a control asphalt and the modified asphalts were performed: penetration, softening point, ductility, ignition point, rheology (using a dynamic cut rheometer – DSR), Multi Stress Creep and Recovery (MSCR), linear amplitude sweep (LAS), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) tests. The results show that fourth additives increase the stiffness and rutting resistance of the asphalts. Additionally, it reports an increase in fatigue cracking resistance when asphalt cement is modified with GCR, G and Husil. The additives give thermal stability to the asphalt cement, providing less mass loss (linked mostly to a less oxidation).

• Autores: Delgado Jojoa, Miguel Gerardo; Rondón Quintana, Hugo Alexander; Sánchez Gilede, Jessica Alexandra; Fernández Gómez, Wilmar Darío; Reyes Lizcano, Fredy Alberto
• Tipo de recurso: Article of journal
• Fecha de publicación: 2018
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/67537
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/67537; http://bdigital.unal.edu.co/68566/
• Palabra clave: 62 Ingeniería y operaciones afines / Engineering; modified asphalt; low density polyethylene waste; crumb rubber; Gilsonite; Husil; asfalto modificado; desecho de polietileno de baja densidad; asfalto-caucho; Gilsonita; Husil
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional