Can Carbon Nanotubes Make Wonders in Civil/Structural Engineering?

Sasmal, Saptarshi; Bhuvaneshwari, B.; Iyer, Nagesh R.

doi:10.5963/pnn0204003

Cited by 17 publications

(5 citation statements)

References 116 publications

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“…CNT are microscopic molecules which are held together by a very strong bond. They are very small particles (diameter 20-40nm, length 1-10m, density 0.15-0.35 g/cm 3 , surface area 35m 2 /g) with carbon purity above 90% and its typically 100 times stronger than the steel so adding carbon nanotube in any concrete mix can reduce or eliminate the usage of the steel reinforcement [2]. The use of CNT as reinforcing material transfers the macroscopic behavior of reinforcement to nano-scopic level by acting as a filler producing denser concrete, prevent crack growth and propagation at early age, reduce final setting time of concrete and improve quality of bond interaction between cement paste and aggregates.…”

Section: Carbon Nanotubesmentioning

confidence: 99%

Application of nanomaterials to enhance microstructure and mechanical properties of concrete

Kwalramani

Syed

2018

IJIE

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The advances of sustainable construction and the green building movement of the past decade have encouraged comprehensive assessment of building materials and construction practices worldwide. With superior fire resistance, strength, and a long service life, concrete is the most widely used construction material in the world. Considering the amount of concrete required for various construction works, enhancing sustainability to concrete, both in terms of concrete production and mix design would be a highly desirable prospect. Lately, nanotechnology is a promising field in terms of environmental improvements including energy savings and reduced reliance on non-renewable resources, as well as reduced waste, toxicity and carbon emissions. Nanotechnology allows enhancement of available concrete products by using nano-materials; these nano-materials could be in the form of nano-particles, nano-chemical additives, and nano-fibers in cement-based materials matrix. The usage of nanomaterials results in production of concrete with lower volume of cement. The influence of addition of various nano particles such as nano silica, nano Al2O3, nano TiO2, nano Fe2O3, nano clays, and highly dispersed carbon nano tubes in concrete is thoroughly investigated in present work with an initiative towards 'Green Concrete' incorporating these waste materials as one of its ingredients.

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Section: Carbon Nanotubesmentioning

confidence: 99%

Application of nanomaterials to enhance microstructure and mechanical properties of concrete

Kwalramani

Syed

2018

IJIE

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“…Theextraordinarycharacteristicsofthecarbonnanostructures(carbonnanotubes, graphene, graphite, carbon fibers, carbon cenosphere, etc.) have revolutionized thefieldofmaterialsandcompositescience (Hanus&Harris,2013;Lu,Li,etal.,2017).Owingtothegreatfunctionalenhancementbythe additionofcarbonnanotubesinthecementcompositesitcanbetrulysaidthatthey possess the ability to make wonders in Civil engineering constructions (Sasmal, Bhuvaneshwari, & Iyer, 2013). Additions of these nano structures is the cement compositeshavebeeninvestigatedbyseveralresearchers,indicatingtheirpositive effectsontheresultantmatrixsuchasKhitabetal.…”

Section: Carbon Nano Structures Addition In Concretementioning

confidence: 99%

Applications of Nano Technology in Civil Engineering

Shamim

Ahmad

Khitab

et al. 2018

International Journal of Strategic Engineering

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This article presents the recent trends in the field of civil engineering with an emphasis on the applications of nano materials and their beneficial effects at nano scale. The role and utilization of nanoparticles such as nano silica, carbon nano tubes, graphene, nano clays, nano CaCO3, nano TiO2, etc., is sharply increasing with the passage of time for achieving high performance composites. These nano materials not only enhance the mechanical properties of the resulting composites but also produce multifunctional characteristics. In this review, the authors have highlighted the various types of nanomaterials being used in the field of civil engineering and the performance improvements achieved by their utilization. Besides the potential benefits of Nano materials, they may pose some health and environmental concerns. A brief discussion is also provided on this issue.

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“…The use of carbon nanotubes as nano-sized reinforcement is a very exciting and interesting research direction in the area of cement and concrete technologies. Carbon nanotubes can be rolled from graphite sheets and multi-walled carbon nanotubes (MWCNT) consist of a number of layers (Sasmal et al 2013). The diameter of MWCNT is 10-20 nm.…”

Section: Modification Of the Concrete Structurementioning

confidence: 99%

Investigation of Influence of Nano-Reinforcement on the Mechanical Properties of Composite Materials

Kononova

Krasņikovs

Stonys

et al. 2016

Journal of Civil Engineering and Management

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The present work studies the possibility to decrease the formation of micro and nano cracks around short fibres in fibre-reinforced concrete (FRC) composite with the help of nano-reinforcement, which is carbon nanotubes, or micro reinforcement, which is carbon short fibres and nano-fillers. Tensile and bending strength of FRC depends on the spatial distribution of fibres inside a material, type of fibre and cement matrix, as well as an effective micromechanical work of each fibre while pulling out of the concrete matrix. Shrinkage stresses, acting in the matrix in the vicinity of a fibre, lead to the formation of micro-cracks. Such micro-cracks were observed experimentally and were investigated numerically performing broad modelling based on the finite element method (FEM). The investigation was focused on the micromechanical behaviour of a single steel fibre in a cement matrix. Numerical modelling results demonstrated a high level of shrinkage overstresses around steel fibres in concrete. The role of nano and micro admixtures, nanotubes, short carbon fibres as well as the role of water/cement ratio in a high performance concrete matrix, changing (increasing or decreasing) the friction force between the matrix and the steel fibre, were investigated experimentally by way of performing a single fibre pull-out tests. The high scatters of experimental results were obtained in performed pull-out tests. At the same time, for the same series of samples, a positive role of micro and nano admixtures and carbon nanotubes in the increase of pull-out force was recognised.

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Can Carbon Nanotubes Make Wonders in Civil/Structural Engineering?

Cited by 17 publications

References 116 publications

Application of nanomaterials to enhance microstructure and mechanical properties of concrete

Application of nanomaterials to enhance microstructure and mechanical properties of concrete

Applications of Nano Technology in Civil Engineering

Investigation of Influence of Nano-Reinforcement on the Mechanical Properties of Composite Materials

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