Effect of nano-silica in concrete; a review

Abhilash, PR; Nayak, Dheeresh Kumar; Sangoju, Bhaskar; Kumar, Rajesh; Kumar, Vikas

doi:10.1016/j.conbuildmat.2021.122347

Cited by 112 publications

(6 citation statements)

References 96 publications

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“…However, among all the nanoparticles mentioned, nano-SiO 2 is the one that is most widely used in concrete technology because of its high reactivity and higher specifc surface area, which promote better pozzolanic reactivity and result in a denser calcium silicate hydrate (CSH) gel with improved strength and durability. Research works of Zhang et al [8] and Abhilash et al [9] dealing with the efects of NS in enhancing the mechanical, durable, and microstructure characteristics in the concrete in fresh state and in hardened state also confrm this. Amin et al [10] and Ershad et al [11] in their research works have stated that NS can frequently be employed to increase the slurry's impermeability and the hardened material's mechanical qualities, so it is obvious that starting from the fresh properties such as slump to hardened properties, incorporation of nanosilica has proved its positive impression in the mix properties.…”

Section: Introductionmentioning

confidence: 65%

Mechanical, Durability, and Microstructure Investigations on High-Strength Concrete Incorporating Nanosilica, Multi-Walled Carbon Nanotubes, and Steel Fibres

Sumathi

Elavarasi

Karthikeyan

et al. 2023

Advances in Materials Science and Engineering

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In present research, the strength properties, impact resistance, and durability characteristics of high-strength concrete blended with nanosilica (NS) and reinforced with multi-walled carbon nanotubes (MWCNTs) are discussed. The proportion consists of nanosilica added in a constant addition of 1% and MWCNT added in a varied dosage of 0.025%, 0.05%, 0.1%, 0.15%, and 0.2% by weight of the cement. A total of 11 mixes were made including the control mix having no MWCNT. The other 10 mixes were categorized into two classes with one class having steel fibres incorporated as 1% of the total volume of the concrete along with the other ingredients such as 1% NS and different proportions of MWCNT. The other class was made without steel fibres retaining only the NS and different MWCNT proportions. Besides the standard compression and tension tests, to determine the energy absorbing capacity of the mix specimens, impact test was also performed. The strength tests were carried out for 3, 7, and 28-day curing. Also, durability tests were carried out with sorptivity, porosity, and mass loss of the specimens when exposed to aggressive HCL and H2SO4 acid. To validate the experiment results, microstructure studies such as scanning electron microscopy (SEM) were also conducted on the samples. Among all mixes, 28-day compressive strength (CS) of 0.2% MWCNT with 1% NS and 1% steel fibre mix was found to increase by 22% compared to control concrete.

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Section: Introductionmentioning

confidence: 65%

Mechanical, Durability, and Microstructure Investigations on High-Strength Concrete Incorporating Nanosilica, Multi-Walled Carbon Nanotubes, and Steel Fibres

Sumathi

Elavarasi

Karthikeyan

et al. 2023

Advances in Materials Science and Engineering

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“…Role of processing technique in enhancing the amount of silicon dioxide in the pozzolanic material improves the properties of cementitious composites [ 41 , 42 ]. Enhanced fresh properties are due to the high surface area of NS particles, and part of the surface area in NS starts hydrating, resulting in an increase in the fluidity of the mix [ 43 ]. The increase in the compressive strength of concrete with the incorporation of NS is owing to the dense microstructure.…”

Section: Introductionmentioning

confidence: 99%

“…The increase in the compressive strength of concrete with the incorporation of NS is owing to the dense microstructure. A stronger interfacial transition zone (ITZ) because of the addition of NS contributes to the increase in the splitting tensile strength and flexural strength of concrete [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced fresh and hardened properties of foamed concrete modified with nano-silica

Othuman Mydin,

Jagadesh,

Bahrami

et al. 2024

Heliyon

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“…Silicon dioxide nanoparticles, or nano-silica, can improve concrete’s mechanical and durability properties [ 29 ]. In order to produce geopolymers with high mechanical strength and low permeability, different activators based on modified nano silica were used in the preparation process, in which it plays a key role in activation of the aluminosilicate in the precursors such as FA [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Synergic effect of polyester fiber and nano silica on chemical resistance of geopolymer mortar

Hussein,

Mosaberpanah,

Kurda

2023

PLoS ONE

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The aim of this study is to evaluate the synergistic effect of polyester fiber-reinforced and nanoslica on the technical performance and durability of geopolymer mortar in terms of the chemical resistance. The study examined how the addition of polyester fiber and nanosilica affects the short-term severe durability of geopolymer mortar specimens made with fly ash (type F). The specimens were cured under ambient conditions. Different percentages (0.6%, 1.2%, and 1.8%) of polyester fiber were used, both with and without nanosilica. Additionally, a reference mixture containing only nanosilica was prepared.All mixtures had a liquid to binder ratio of 0.50, and the ratio of NaOH to Na2SiO3 solution was kept at 2.5:1 by weight. The produced mixes, after 28 days of ambient curing, were immersed for another 28 days in solutions containing 3.5%, 5%, and 5% of sodium chloride, magnesium sulphate and sulfuric acid, respectively. For comparison, control specimens which were not exposed to chemical attacks were tested at the same age of 56 days. Moreover, water absorption and sorptivity tests were conducted to explain the durability performance in a more detailed way. The test results express that the combination of both materials showed a synergistic effect and resulted in greater improvements in compressive and flexural strengths. Both materials can reduce the reduction in compressive strength caused by sulfuric acid exposure, but polyester fiber can increase mass loss. The presence of magnesium sulfate and sodium chloride can lead to a reduction in strength, but the addition of both polyester fiber and nanosilica can mitigate these effects. The addition of fibers creates a network of pores that can limit water absorption, and nanosilica can further enhance the microstructure and reduce water absorption. However, using polyester fiber beyond 1.2 percent can adversely affect the rate of water absorption.

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Effect of nano-silica in concrete; a review

Cited by 112 publications

References 96 publications

Mechanical, Durability, and Microstructure Investigations on High-Strength Concrete Incorporating Nanosilica, Multi-Walled Carbon Nanotubes, and Steel Fibres

Mechanical, Durability, and Microstructure Investigations on High-Strength Concrete Incorporating Nanosilica, Multi-Walled Carbon Nanotubes, and Steel Fibres

Enhanced fresh and hardened properties of foamed concrete modified with nano-silica

Synergic effect of polyester fiber and nano silica on chemical resistance of geopolymer mortar

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