Microwave Induction Heating of Polymer-Modified Asphalt Materials for Self-Healing and Deicing

Mansour Fakhri,Sajad Javadi,Alireza Sassani,Reza Sedghi,Behnam Baveli Bahmai,Ali Arabzadeh

doi:10.3390/su131810129

Mansour Fakhri, Sajad Javadi + Show 4 more

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https://doi.org/10.3390/su131810129

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Abstract

This study evaluates the influence of polymer-modification on the induction heating capability of asphalt mastic in a microwave field, and investigates how effectively this approach can be utilized for ice melting and self-healing purposes. To this end, different asphalt mastic mixtures with different polymer-modification and mixing procedures were tested under microwave field exposure for induction heating capability, ice-melting ability, and self-healing capacity. The mixtures were made through warm-mix and hot-mix procedures with four bituminous binders, including virgin (unmodified) asphalt and the same binder modified with three types of polymers. The results showed the effectiveness of microwave induction heating of asphalt mastic for both crack-healing and deicing purposes. The binder type was found to influence the ice melting and crack healing rates, such that using a warm-mix asphalt binder resulted in a more efficient heat generation and conduction than using a virgin asphalt binder. While polymer-modification undermined induction-heating, ice-melting, and self-healing performances, SBS-modified asphalt binders exhibited better performance than the other polymer-modified binders.

Highlights

Published: 10 September 2021Asphalt binder can be modified with different materials such as polymers, jet grouting waste, steel slag, and recycled asphalt to achieve desired properties [1,2,3,4,5]
The volumetric heating mechanisms mentioned above enable heating the materials in a faster and more uniform fashion, obvirior workability and compactability [54], and a higher density; the volumetric induction heating is more effective in the case of warm mix asphalt (WMA) specimens and the heat transfer to the surface occurs through a more continuous, uniform medium
The WMA specimens made with virgin binder showed the highest surface temperaating the the incorporation of electrically additives

Summary

Introduction

Published: 10 September 2021Asphalt binder can be modified with different materials such as polymers, jet grouting waste, steel slag, and recycled asphalt to achieve desired properties [1,2,3,4,5]. Asphalt binder is the residue of crude petroleum with properties depending on its source and refining process [6]. It is generally known as a viscoelastic material with a temperaturedependent dynamic behavior. The appearance and propagation of cracks are the primary and most critical forms of distress in asphalt pavements that reduce the serviceability of asphalt pavements, affecting the ride quality and safety. The asphalt pavement surface course must provide a reasonably long service life during which it maintains ride quality and skid resistance at satisfactory levels. Asphalt materials have intrinsic self-healing properties that allow the closing of the existing cracks by heat. The self-healing properties can be enhanced through binder modification or the Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations

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