The influence of silica fume, nano silica and mixing method on the strength and durability of concrete

Sharaky, I.A.; Megahed, F. A.; Seleem, M. H.; Badawy, A M

doi:10.1007/s42452-019-0621-2

Cited by 27 publications

(10 citation statements)

References 38 publications

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“…When the NS percentage is large, the weak zone in concrete increases then compressive strength decreases. This decrease is owing to the agglomeration and defects generated in the dispersion of NS particles this result is matched with (Sharaky et. al., 2019) [33].…”

Section: Mechanical Propertiessupporting

confidence: 83%

Investigation of Using Nano-silica, Silica Fume and Fly Ash in High Strength Concrete

Fahmy

El-Hassan

Kamh³

et al. 2020

ERJ. Engineering Research Journal

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This study aims to investigate the performance of hardened high strength concrete cast using Nano-silica, silica fume and fly ash. Experiments were conducted by substituting cement by weight with Nano-silica, silica fume or fly ash with ratios of 5 %, 10% and 15% and compared to a control mix. This study generally proposes a sustainable solution to produce durable concrete that could have useful application in the construction industry. Based on the results obtained, the hardened properties of concrete improved depending on the type of supplementary cementious materials. Test results showed that adding the suggested types is effective to improve concrete strength. Adding Nano-silica has a great influence on concrete properties. Increasing the dosage over 5.0% affects badly on strength.

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Section: Mechanical Propertiessupporting

confidence: 83%

Investigation of Using Nano-silica, Silica Fume and Fly Ash in High Strength Concrete

Fahmy

El-Hassan

Kamh³

et al. 2020

ERJ. Engineering Research Journal

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“…Equation (1) and current regulations cannot predict and consider these observations. Increasing RCI bond strength as compared with the NC can be attributed to the higher compressive strength of nano-concrete than NC [185,192,[218][219][220]. Nanoparticles not only act as nano-filler to improve the microstructure but also act as an activator to accelerate pozzolanic reactions [221].…”

Section: Rci Bond Strength In Nano-concretementioning

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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“…Maximum decrease in the shrinkage strain was observed for the concrete specimens in SC compared to USC. Also, as the percentage of SF increases, the rate of shrinkage strain increases for both grades of the concrete [24][25][26]. For M40 grade concrete, the rate of shrinkage strain is more compared to M25 grade under all levels of replacement of SF.…”

Section: Autogenous Shrinkagementioning

confidence: 99%

Effect of silica fume on the hardened and durability properties of concrete

Sivamani

Neelakantan

2021

IRASE

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This paper involves the study on the hardened and durability properties of the concrete at two different grades containing silica fume (SF) with various replacement percentages. Investigation on the performance of the SF was performed for M25 and M40 grades concrete with 0, 5, 10, and 15 % replacement levels at 7, 14, 28, and 90 days. The behavior of SF on the autogenous shrinkage of the concrete was studied for both the grades of concrete in the sealed (SC) and unsealed conditions (USC). The workability of the SF concrete was examined at various levels of replacement by the slump cone test. The hardened properties of the SF concrete were investigated through the estimation of compressive strength (CS) and elastic modulus (EM) at 7, 14, 28, and 90 days, respectively. Acid attack was conducted at 28 days and autogenous shrinkage of the SF concrete was investigated using length comparator at 28 day in SC and USC. Results indicate that upon increase in the percentage of SF, the hardened properties of the concrete increases at higher ages of curing and the shrinkage of the concrete tends to increase for both the grades of concrete.

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The influence of silica fume, nano silica and mixing method on the strength and durability of concrete

Cited by 27 publications

References 38 publications

Investigation of Using Nano-silica, Silica Fume and Fly Ash in High Strength Concrete

Investigation of Using Nano-silica, Silica Fume and Fly Ash in High Strength Concrete

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

Effect of silica fume on the hardened and durability properties of concrete

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