Thermal proprieties and decomposition kinetics of asphalt binder modified by thermoplastic polymer and nanoclay Dellite 43B

Lucas Tamele Jr.; Herminio Muiambo; Giovanna Buonocore; Carlos Cumbane

doi:10.6180/jase.202301_26(1).0002

Thermal proprieties and decomposition kinetics of asphalt binder modified by thermoplastic polymer and nanoclay Dellite 43B

Lucas Tamele Jr.¹, Herminio Muiambo This email address is being protected from spambots. You need JavaScript enabled to view it.¹, Giovanna Buonocore², and Carlos Cumbane³

¹Department of Chemistry, Faculty of Sciences, Eduardo Mondlane University, Julius Nyerere Venue 3453, Maputo, Mozambique
²Institute of Polymers, Composites and Biomaterials (IPCB) – National Research Council, Naples, Italy
³Department of Communication Routes, Mozambique Engineering Laboratory, Mozambique Avenue, Maputo, Mozambique

Received: November 11, 2021
Accepted: January 4, 2022
Publication Date: March 15, 2022

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202301_26(1).0002

ABSTRACT

Asphalt is the most suitable material for road pavement. However, due to mechanical and environmental loads, asphalt tends to show fatigue damage and thermal cracking. To avoid or mitigate these failures, the present research proposes the use of thermoplastic polymers, High-density polyethylene (HDPE) and Linear low-density polyethylene (LLDPE), and nanoclay Dellite 43B for asphalt binder modification. The nanocomposites were prepared in a high-shear mixer using the solution intercalation method for a mixing time of 1.5 h, at 180 ^oC and 5000 rpm. Thermogravimetric analysis (TGA) was performed with a heating rate of 10 ^oC/min, from 25 to 600 ^oC under air and N2 atmospheres with a flow rate of 100 mL/min. The TGA data and kinetic analysis showed that the nanocomposites presented greater thermal stability than unmodified asphalt and polymer-modified asphalt binder. Hence, the initial and final decomposition temperatures were increased and the incorporation of nanoclay lead to higher activation energy, entropy, enthalpy change and Gibbs free energy values.

Keywords: Asphalt; Nanoclay Dellite 43B; Polymer modified asphalt; thermal analysis; kinetics

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