Repositorio
Institucional

Calabi-Floody, Alejandra

Mignolet-Garrido, Cristian

Valdes-Vidal, Gonzalo

Study of the Effect of the Use of Asphalt Binders Modified with Polymer Fibres from End-of-Life Tyres (ELT) on the Mechanical Properties of Hot Mix Asphalt at Different Operating Temperatures

MDPI

MATERIALS

en

Processing of end-of-life tyres (ELT) produces polymer fibres (PFELT) as a by-product. PFELT currently presents a challenge to the recycling industry, due to the increasing numbers of ELT and lack of alternatives for the re-use of this material. The object of this investigation was to propose an alternative for re-using PFELT, in order to improve the performance properties of hot mix asphalt (HMA). This study enabled us to understand the relation between the addition of polymer fibre to the aggregate-binder matrix of the HMA in depth, as well as its effects on the mechanical properties of the resulting asphalt mix. To do this, we first made a physical and chemical characterization of the PFELT (TGA, SEM, polarized light, and fluorescence microscopy), establishing a modification methodology using two asphalt binders (CA-24 and CA-14) and three PFELT contents (0.1%, 0.3%, and 0.5%). The HMA was designed using the Marshall method. The mechanical performance of the HMA was evaluated in a range of operating temperatures, from -10 degrees C to 50 degrees C, observing the following properties: (1) resistance to thermal cracking, (2) stiffness modulus, (3) indirect tensile strength, and (4) resistance to permanent deformation. The results show that the addition of 0.3% and 0.5% of PFELT to the asphalt binder significantly improved the mechanical performance properties of the mixes studied, with a greater effect at high operating temperatures, the resistance to permanent deformation increased by more than 30%.

artículo original

This research was funded by the National Research and Development Agency of Chile (ANID) and conducted within the framework of FONDECYT INICIATION Project No 11190860.

Esta investigación fue financiada por la Agencia Nacional de Investigación y Desarrollo de Chile (ANID) y realizada en el marco del Proyecto FONDECYT INICIACIÓN N° 11190860.

10.3390/ma15217578

PDF

end-of-life tyres

polymer fibre

fibre-modified asphalt

mechanical properties

asphalt mixtures

TEXTILE FIBERS

REUSE

RUBBER

PERFORMANCE

SCENARIOS

Química Física

Ciencia de Materiales

Multidisciplinaria

Metalurgia e Ingeniería Metalúrgica

Física Aplicada

Física

Materia Condensada

Neumáticos al final de su vida útil

fibra polimérica

asfalto modificado con fibras

propiedades mecánicas

mezclas asfálticas

FIBRAS TEXTILES

REUTILIZACIÓN

CAUCHO

RENDIMIENTO

ESCENARIOS

Study of the Effect of the Use of Asphalt Binders Modified with Polymer Fibres from End-of-Life Tyres (ELT) on the Mechanical Properties of Hot Mix Asphalt at Different Operating Temperatures

artículo original

version publicada

CC BY 4.0

CC BY 4.0

acceso abierto

acceso abierto

ANID-FONDECYT 11190860

ANID FONDECYT 11190860

WOS:000883139700001