The effects of moisture susceptibility and ageing conditions on nano-silica/polymer-modified asphalt mixtures

Nur Izzi Md Yusoff, Aeyman Abozed Saleh Breem, Hani N M Alattug, Asmah Hamim, Juraidah Ahmad

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

This study investigates the performance characteristics of polymer-modified asphalt mixture (PMA) with the addition of nano-silica particles. Polymer-modified asphalt, PG-76, was mixed with nano-silica at concentrations of 0%, 2% and 4% by weight of asphalt binder. Asphalt mixture tests such as moisture susceptibility, resilient modulus and dynamic creep were conducted to evaluate the performance of PMA mixed with nano-silica under various ageing and moisture susceptibility conditions. During the mixing process, the binders were kept at 160 °C and blended using a shear rate of 1500 rpm (rpm) for approximately 1 h. Microstructure examinations of the asphalt binders were then carried out using scanning electron microscopy (SEM). The SEM images show that the nano-silica particles disperse well in the asphalt binder matrix. Nano-silica reduces the susceptibility to moisture damage and increases the strength of asphalt mixes. It is also observed that fatigue and rutting resistance are enhanced for PMA mixed with nano-silica particles. Ageing index values show that the susceptibility to oxidative ageing is significantly reduced with the increase of nano-silica content, particularly in the case of long-term ageing. The addition of 4% nano-silica with PMA appears to have the greatest potential for beneficial modification of the binder.

Original languageEnglish
Pages (from-to)139-147
Number of pages9
JournalConstruction and Building Materials
Volume72
DOIs
Publication statusPublished - 15 Dec 2014

Fingerprint

asphalt
Asphalt mixtures
Silicon Dioxide
Polymers
Moisture
Aging of materials
Silica
Asphalt
Binders
Scanning electron microscopy
Shear deformation
Creep
Fatigue of materials
Microstructure

Keywords

  • Ageing
  • Moisture damage
  • Nano-silica
  • Polymer-modified asphalt mixture
  • Rutting

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Cite this

The effects of moisture susceptibility and ageing conditions on nano-silica/polymer-modified asphalt mixtures. / Md Yusoff, Nur Izzi; Breem, Aeyman Abozed Saleh; Alattug, Hani N M; Hamim, Asmah; Ahmad, Juraidah.

In: Construction and Building Materials, Vol. 72, 15.12.2014, p. 139-147.

Research output: Contribution to journalArticle

Md Yusoff, Nur Izzi ; Breem, Aeyman Abozed Saleh ; Alattug, Hani N M ; Hamim, Asmah ; Ahmad, Juraidah. / The effects of moisture susceptibility and ageing conditions on nano-silica/polymer-modified asphalt mixtures. In: Construction and Building Materials. 2014 ; Vol. 72. pp. 139-147.
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