WS2 nanotube - Reinforced cement: Dispersion matters

Roey Nadiv; Michael Shtein; Alva Peled; Oren Regev

doi:10.1016/j.conbuildmat.2015.08.085

WS₂ nanotube - Reinforced cement: Dispersion matters

Roey Nadiv, Michael Shtein, Alva Peled, Oren Regev

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Nanotubes are considered as promising nano-reinforcement in cement-based materials. The main challenge towards achieving a significant enhancement in cement properties is an effective dispersion of the agglomerated nanotubes. In this paper, we demonstrate a novel dispersion method of Tungsten di-Sulfide NanoTubes (WS₂NTs) that results in substantial flexural and compressive strength enhancements at optimal nanotube concentration as low as 0.15 wt%. The reinforcement by WS₂NTs remains significant after a variety of curing processes, suggesting a genuine nanoscale reinforcing effect. Finally, by employing a comprehensive fractography we found that the WS₂NTs inhibit crack propagation by bridging with a pullout failure mechanism.

Original language	English
Pages (from-to)	112-118
Number of pages	7
Journal	Construction and Building Materials
Volume	98
DOIs	https://doi.org/10.1016/j.conbuildmat.2015.08.085
State	Published - 15 Nov 2015

Keywords

Cement
Dispersion
Fractography
Mechanical properties
Nano-composites
Nanotubes

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

Access to Document

10.1016/j.conbuildmat.2015.08.085

Cite this

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title = "WS2 nanotube - Reinforced cement: Dispersion matters",

abstract = "Nanotubes are considered as promising nano-reinforcement in cement-based materials. The main challenge towards achieving a significant enhancement in cement properties is an effective dispersion of the agglomerated nanotubes. In this paper, we demonstrate a novel dispersion method of Tungsten di-Sulfide NanoTubes (WS2NTs) that results in substantial flexural and compressive strength enhancements at optimal nanotube concentration as low as 0.15 wt%. The reinforcement by WS2NTs remains significant after a variety of curing processes, suggesting a genuine nanoscale reinforcing effect. Finally, by employing a comprehensive fractography we found that the WS2NTs inhibit crack propagation by bridging with a pullout failure mechanism.",

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AU - Shtein, Michael

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AB - Nanotubes are considered as promising nano-reinforcement in cement-based materials. The main challenge towards achieving a significant enhancement in cement properties is an effective dispersion of the agglomerated nanotubes. In this paper, we demonstrate a novel dispersion method of Tungsten di-Sulfide NanoTubes (WS2NTs) that results in substantial flexural and compressive strength enhancements at optimal nanotube concentration as low as 0.15 wt%. The reinforcement by WS2NTs remains significant after a variety of curing processes, suggesting a genuine nanoscale reinforcing effect. Finally, by employing a comprehensive fractography we found that the WS2NTs inhibit crack propagation by bridging with a pullout failure mechanism.

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