Morphological and physical characteristic of stone mastic asphalt mixture incorporating nano silica

Putra Jaya, Ramadhansyah and K. A., Masri and Ahmad Kamil, Arshad and Mohd Zul Hanif, Mahmud (2020) Morphological and physical characteristic of stone mastic asphalt mixture incorporating nano silica. The Open Civil Engineering Journal, 14 (1). pp. 113-125. ISSN 1874-1495. (Published)

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Introduction: Asphalt binder plays an important role in contributing to the good performance of asphalt mixture. However, the interlocking structure of asphalt binder is delicate and sensitive due to surrounding temperature and moisture. Methods: Previously, asphalt binder usually modified with polymer modifier. But, this type of modifier has low temperature susceptibility. To overcome this, nanomaterial is introduced to enhance the performance of virgin asphalt binder. Among the crucial evaluation of nano-modification is to evaluate its microstructural changes through morphological property evaluation. The addition of nanomaterial then will significantly improve the inner structure of asphalt binder and reduce the effect of those problems. Aim: Thus, the aim of this study was to assess the morphological properties of nanosilica modified asphalt binder to determine the inner structured properties of modified specimen. Results: Among the morphological tests conducted for asphalt binder in this study were Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and Atomic Force Microscope (AFM). From SEM image analysis and XRD evaluation, the existence of Nanosilica (NS) inside the asphalt binder was well dispersed and from these two tests, the existence of NS inside asphalt binder was verified. From AFM results, most of NS-MB images before and after ageing conditions displayed the typical bee structure (Catana Phase). Conclusion: It was also concluded that the addition of NS in asphalt binder improved its surface stiffness. The overall surface stiffness of the asphalt binder after aging was increased and the surface became more solid.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Morphological; Physical; Nano silica; Bitumen; Stone mastic asphalt; Catana phase
Subjects: T Technology > TE Highway engineering. Roads and pavements
Faculty/Division: College of Engineering
Centre of Excellence: Earth Resources & Sustainability Centre (ERAS)
Depositing User: PM Dr. Ramdhansyah Putra Jaya
Date Deposited: 15 Jul 2020 04:08
Last Modified: 15 Jul 2020 04:08
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