Nano-silica sol-gel and carbon nanotube coupling effect on the performance of cement-based materials

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

11 Scopus Citations
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Author(s)

  • Weiwen Li
  • Forood Torabian Isfahani
  • Yaocheng Wang
  • Gengying Li
  • Yi Liu
  • Feng Xing

Detail(s)

Original languageEnglish
Article number185
Journal / PublicationNanomaterials
Volume7
Issue number7
Online published14 Jul 2017
Publication statusPublished - Jul 2017

Link(s)

Abstract

Carbon nanotubes (CNTs) have shown promise for improving the mechanical performance of cement composites through crack-bridging and frictional pull-out. The interactive behaviors between CNTs and cement matrix act are crucial in optimizing the reinforcement of CNTs in cement composites. This study investigates the effects of nano-silica (NS) sol-gel on the interactive behaviors of CNTs and the cement matrix through a series of experiments and analyses. UV-visible spectrometer results show that CNTs are well-dispersed in suspension and the addition of NS has a negligible effect on the stability of CNT dispersion. Calorimetry tests and dynamic mechanical analysis demonstrate the nucleation and frictional performance of CNTs in cement matrix, respectively. The paper shows that the physical adsorption of NS on the CNT surface could result in the acceleration of cement hydration. Morphology observation confirms that a denser interface between CNTs and cement hydrates is formed. Finally, the improved interaction between CNTs and cement hydrates leads to a substantial increase in friction between CNTs and the cement matrix under periodic loading. NS may act as an ideal admixture for improving both the interactive behaviors between CNTs and cement matrix and the damping properties of cement composite.

Research Area(s)

  • Carbon nanotubes (CNTs), Energy dissipation, Interfacial adhesion, Nano-silica (NS), Nucleation effect

Citation Format(s)

Nano-silica sol-gel and carbon nanotube coupling effect on the performance of cement-based materials. / Li, Weiwen; Ji, Weiming; Isfahani, Forood Torabian; Wang, Yaocheng; Li, Gengying; Liu, Yi; Xing, Feng.

In: Nanomaterials, Vol. 7, No. 7, 185, 07.2017.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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