Application of nanotechnology in concrete and supplementary cementitious materials: a review for sustainable construction

Olafusi, Oladipupo S.; Sadiku, Emmanuel Rotimi; Snyman, Jacques; Ndambuki, Julius M.; Kupolati, Williams Kehinde

doi:10.1007/s42452-019-0600-7

Cited by 30 publications

(11 citation statements)

References 32 publications

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“…[171]. Extensive efforts were made to study the mechanical and durability properties of nano-concrete, which are summarized in some review papers [161,[172][173][174][175][176][177][178][179][180][181]. Previous studies only concentrated on compressive, tensile, and flexural strengths as the mechanical properties of nanoconcrete.…”

Section: Case Study: Concrete Containing Nanoparticlesmentioning

confidence: 99%

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

2020

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Minimum concrete cover for rebar, rebar diameter, concrete compressive strength, embedded length of rebar, and lateral reinforcement by stirrups are the crucial factors considered in existing predicting equations and regulations for predicting rebar-concrete interface (RCI) bond strength. However, considerable effects of concrete composition on RCI are ignored in design codes and investigations. This paper intends to comprehensively highlight the critical aspects of this research gap. Additionally, a practical experimental approach is described in the present study to efficiently consider the effect of the new generations of concrete on RCI bond strength. Finally, nano-concrete is considered as a case study to show the importance of nanoparticle types on RCI bond strength. Overall results show that studying the microstructure of the transition zone at RCI is essential to accompany with the RCI bond strength for considering new generations of concrete in reinforced concrete structures. Additionally, the current study emphasizes that more investigations are necessary to be conducted by future works to fill the existing research gaps in RCI.

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Section: Case Study: Concrete Containing Nanoparticlesmentioning

confidence: 99%

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

2020

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“…To this end, the nanomaterials addition may play a key role in improving the nanostructure of SCC which ultimately leads to enhancement of physical, mechanical, and durability properties of SCC and its sustainability. Regarding this last aspect, the benefits of clean nanotechnology adoption in concrete 20–23 and cement 24–28 production are widely reported, and may indeed lead to a new generation of high‐performance concrete material for sustainable construction.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on rheological, mechanical, and microstructure properties of self‐compacting concrete containing perovskite nanomaterial

Bahari

Sadeghi‐Nik

Shaikh

et al. 2021

Structural Concrete

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This article presents the effect of LaSrCoO3, oxides commonly known as LSCO nanomaterials, on rheological, mechanical and microstructural properties of self‐compacting concrete (SCC). LSCO nanomaterials contents of 1–4 wt% are considered in this study. Compressive, flexural and split tensile strengths of SCC mixes are evaluated at curing ages of 7, 28, and 90 days. The effect of LSCO nanomaterials on the microstructures of above concretes is also evaluated using Fourier transform infrared spectroscopy, scanning electron microscopy, X‐ray diffraction, thermogravimetric analysis techniques, Williamson–Hall equation, and X‐Powder software. Results show that workability of SCC mixes decrease with increase in LSCO nanomaterials. Increases are observed in compressive, flexural and split tensile strengths in SCC mixes when LSCO nanomaterials contents increase up to 2 wt%, followed by a decreasing trend which indicate 2 wt% as being the optimum amount. The microstructural analysis by means of various techniques also revels compact microstructure of cement matrix in SCC mixes containing 2 wt% LSCO nanomaterials, confirming the results of mechanical properties.

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“…Various mechanical, tribological and nano-industry applications is always searching for new materials [1]. Transition metal diborides, nitrides and carbides characterized by high hardness, melting point and temperature stability in both bulk and film (nanomaterial) state [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and tribological characterization of nanostructured HfB2 films deposited from compound target

et al. 2020

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Fabrication and development of HfB 2 -based nanostructured coatings was investigated. All films were deposited on stainless-steel substrates by RF magnetron sputtering from stochiometric HfB 2 target in argon atmosphere. The aim of this work is to evaluate the effects of the bias potential on the microstructure, mechanical and tribological properties. These parameters strongly depend on the experimental conditions. X-ray diffraction analysis indicated the difference in microstructure: from dense hexagonal structure with (0001) preferred orientation of nanocrystallites to quasi-amorphous with blurred HfB 2 phase peaks. All coatings were measured using nanoindentation (using Berkovich tip), tribology (ballon-disk) and nano-scratch (friction). Coatings with a thickness of 1-2 µm had a significant dependence of properties on the microstructure: hardness drastically increased from 8 to 45 GPa, H/E ratio and elastic recovery changed respectively: 0.04-0.15 and 0.26-0.72.

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Application of nanotechnology in concrete and supplementary cementitious materials: a review for sustainable construction

Cited by 30 publications

References 32 publications

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

Experimental studies on rheological, mechanical, and microstructure properties of self‐compacting concrete containing perovskite nanomaterial

Mechanical and tribological characterization of nanostructured HfB2 films deposited from compound target

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