Nano-Reinforcement in Cement Composites: Tubes and Platelets

Author(s): Roey Nadiv, Matan Birenboim, Oren Regev and Alva Peled
Paper category: Proceedings
Book title: Proceeding of the 71st RILEM Annual Week & ICACMS 2017
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN:978-2-35158-195-7, 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 55-60
Total Pages: 6
Language : English

Abstract: The unique mechanical properties of nanomaterials and their extremely large surface area, have promoted their incorporation in composite materials. The wide range of nanomaterials, differing in morphology, composition and quality has yielded handful of nanocomposites materials with enhanced properties. In this paper, the reinforcing potential of various nanomaterials in cement paste composites, differing in their morphology, is reviewed: 1D - straight tungsten di-sulfide nanotubes (WS2NTs), waved carbon nanotubes (CNTs) and 2D - graphene oxide nano-platelets (GOs). The dispersion of this nanomaterials is evaluated by electron microscopy, and their effect on both compressive and flexural strengths of cement nanocomposites is measured. Both nanotubes (CNT and WS2NT) offer valuable reinforcing
effect in terms of flexural and compressive strengths (25-38 %) at extremely low content (0.063 vol % and 0.15 vol % for WS2NT and CNT respectively). The GOs are also attractive fillers achieving 66 % and 29 % enhancements in flexural and compressive strengths, respectively (over plain cement, at content of <0.075 vol %). The nanotubes reinforce the matrix by arresting crack propagation and promoting the hydration reaction by serving as nucleation agents. The GOs reinforcing effect is attributed to their superior interaction between their functional oxide groups and the cement constituents.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00