The High Temperature Performance Evaluation of Polymer/Nanocomposite Modified Asphalt Cement

Abstract

The current study focuses on the effect of Acrylate-styrene-acrylonitrile (ASA)/Nanosilica (Si) modified binders on the complex modulus (G*) and rutting resistance parameters (G*/ sinδ) of Asphalt Cement (AC). Four different blends including the base binder and the polymer nanocomposites which were formed by blending 5% ASA to base binder with the addition of nanosilica at 3, 5 and 7% by the weight were the subject of investigations. Conventional and Dynamic Shear Rheometer (DSR) testing procedures were conducted as well as morphology analysis using Fourier Transform Infrared Spectroscopy (FT-IR). The rheological characteristics of AC were analysed by master curves, isochronal plots and rutting resistance parameter plots. Test results revealed that G* and G*/ sinδ of all modified samples were significantly enhanced compared to the base binder. Multiple Stress Creep Recovery Test (MSCRT) conducted at 100 Pa and 3200 Pa showed that, non-recoverable compliance was reduced and elastic recovery of modified binders were improved. Optimum concentration was found to be 5% ASA/Si composite, as further addition of polymer nanocomposite resulted in lower enhancement in the rheological properties of modified AC due to the occurrence of agglomeration between the composite and the base binder.

Experimental Investigation of Polymer and Nanomaterial modified Asphalt Binder

“…The stiffness of the modified binders improved with an additional increase in the modifier rate, reaching up to 5% in terms of rheological properties and indicating better resistance to permanent deformation. In [6], polymer/nanocomposite-modified asphalt binders were shown to be significantly improved compared to the base asphalt binder. In [7], the effects of carbon nanofibers on performancemodified asphalt with liquid epoxidized natural rubber were evaluated, showing an increase in stiffness and a reduction in temperature susceptibility.…”

Multi Criteria Performance Analysis for Nano-Iron Oxide Modified Asphalt Cement by Using Fuzzy Promethee II

“…Modification of AC by common materials such as polymers, nanomaterials and polymer nanocomposites is a regularly employed process in the pavement industry to improve the performance characteristics of AC [2]. Particularly, nanomaterials have been favored to improve AC performance due to their versatile engineering features and numerous advantages over other alternative modifiers such as quantum effects and high surface area [3].…”