Effect of nano silica addition on enhancing the performance of cement composites reinforced with nano cellulose fibers

El-Feky, M.S.; Youssef, Passant; El-Tair, Ahmed Maher; Ibrahim, Sara; Serag, Mohamed

doi:10.3934/matersci.2019.6.864

Cited by 26 publications

(18 citation statements)

References 43 publications

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“…El-feky et al [25] also noted similar findings to the present study when they determined the effect of nano silica addition on enhancing the performance of cement composites reinforced with nanocellulose fibers.…”

Section: Fibre Volume Fraction Effects On Flexural Strengthsupporting

confidence: 89%

“…This might be due to the reduction in cross linking density of the polymer composites [8]. El-Feky et al [25] stated that the aforementioned phenomena could be attributed to the fact that nanomaterials got highly agglomerated when being used in relatively high contents due to the van der waals forces which result in the fibres to get entangled and create weak void spots within the matrix, and consequently reducing the strength in such cases.…”

Section: Fibre Volume Fraction Effects On Flexural Strengthmentioning

confidence: 99%

“…El-Feky et al [25], evaluated the effects of different contents of nano silica particles (0, 1, 1.5, and 2% by weight of cement) on the mechanical properties, and microstructure of cement composites reinforced with various contents of nano cellulose fibres (0, 0.35, 0.55, and 0.75% by weight of cement). The authors revealed, that the addition of the NCell particles separately, helped in improving the strength by about twice the value of the control mix when appropriate content of NCell was incorporated (0.35%).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Formulation of nanocellulosic fibres and particle fillers, and their mono and hybrid reinforced polymer composites

Webo¹,

Masu²,

Nziu³

2022

Mater. Res. Express

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Finite element analysis was used to formulate novel models of both mono and hybrid nanocomposites, and, also to predict their flexural properties. This study also formulated the optimal combination mix ratio of fibres and matrix of the flexural properties for use in different applications. The predicted properties were verified using the experimental method. This study found that the flexural properties of all the composites depicted an increase with fibre additions up to a certain optimum point, beyond which they began to fall gradually with further fibre additions. There was also evidence of transverse matrix fracture in rice husk nanoparticle-reinforced epoxy resin composites' flexural stiffness graphs. Moreover, this study found that the increases in flexural properties of mono composites were about two times lower in magnitude than hybrid composites. With regards to the formulation of optimal combination mix ratio of fibres and matrices for different applications, this study found that the optimal combination mix ratio of fibres to the matrix for applications where all the flexural properties were maximized was 4:1. Moreover, the optimal combination mix ratio of fibres to the matrix for applications where the flexural properties were minimized was 1:2. Furthermore, the optimal combination mix ratio of fibres to the matrix for applications with a target of 10 MPa flexural strength properties and 10 GPa for flexural stiffness properties was 2:3

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Section: Fibre Volume Fraction Effects On Flexural Strengthsupporting

confidence: 89%

Section: Fibre Volume Fraction Effects On Flexural Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Formulation of nanocellulosic fibres and particle fillers, and their mono and hybrid reinforced polymer composites

Webo¹,

Masu²,

Nziu³

2022

Mater. Res. Express

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“…In addition, nanosized NS particles fill the voids in cement paste, which facilitates the development of a compacted and refined cementitious composite microstructure. Moreover, NS particles exhibit intense pozzolanic activity and NS can react with free CH, resulting in the production of additional amounts of C-S-H phase (Land and Stephan 2012;Skoczylas and Rucińska 2018b;El-Feky et al 2019). A combination of seawater and NS was the most beneficial for accelerating the strength development process of cement pastes.…”

Section: Compressive Strength Of Cement Pastesmentioning

confidence: 99%

The effects of seawater and nanosilica on the performance of blended cements and composites

Sikora

Lootens²,

Liard³

et al. 2020

Appl Nanosci

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This study investigates the effects of seawater and nanosilica (3% by weight of cement), on the fresh and hardened properties of cement pastes and mortars produced with two types of low heat cements: Portland pozzolana cement (CEM II) and blast furnace cement (CEM III). The heat of hydration, initial and final setting times, rheological properties, strength development, sorptivity and water accessible porosity of the cement pastes and mortars were determined. The data reveal that cement type has a significant effect on the reaction rate of cement with seawater and nanosilica (NS). Specimens produced with slag-blended cement exhibited a higher cement reaction rate and the composite produced exhibited better mechanical performance, as a result of the additional reaction of alumina rich phases in slag, with seawater. Replacement of freshwater with seawater contributes mostly to a significant improvement of early strength. However, in the case of slag-blended cement, 28 day strength also improved. The incorporation of NS results in additional acceleration of hydration processes, as well as to a decrease in cement setting time. In contrast, the addition of NS results in a noticeable increment in the yield-stress of pastes, with this effect being pronounced when NS is mixed along with seawater. Moreover, the use of seawater and NS has a beneficial effect on microstructure refinement, thus improving the transport properties of cement mortars. Overall, the study has showed that both seawater and NS can be successfully used to accelerate the hydration process of low heat blended cements and to improve the mechanical and transport properties of cement-based composites.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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“…Most approaches to modify the properties of cementitious suspensions, hydrated cement, and hardened cement paste, work on the macroscopic or microscopic level, e.g., by adding fillers such as sand or quartz powder to increase packing density and reduce the amount of binder or superplasticizer to improve fluidity and pumpability of concrete [4][5][6][7][8][9][10][11][12][13]. Alternatively, nano-scaled additives (TiO 2 [14,15], ZnO [15,16], carbon nanotubes [17,18], a-Fe 2 O 3 [19][20][21][22], SiO 2 [21][22][23][24][25][26][27], and tobermorite nanofibers [28]), can be incorporated. This leads to enhanced external compression and tensile strength [15,23], a reduction of the dormant period while accelerating the hydration of cement, as well as lowering the initial and final setting time by 90-100 min [23], respectively.…”

Section: Introductionmentioning

confidence: 99%

Impact of Hard Magnetic Nanocrystals on the Properties of Hardened Cement Paste

Kißling,

Mahlbacher,

Wesemann

et al. 2023

Chemie Ingenieur Technik

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In this work, nano‐sized hard magnetic gallium‐substituted iron oxide crystals, wherein gallium is used to stabilize the metastable epsilon iron oxide phase, were added to cement‐water suspensions at different ratios, which were subsequently hydrated for at least 28 days. It is shown that higher contents of such nanocrystals in the hardened cement paste introduce a magnetic moment, whereas the mechanical properties remain unchanged compared to non‐blended hardened cement paste for a wide concentration range.

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Effect of nano silica addition on enhancing the performance of cement composites reinforced with nano cellulose fibers

Cited by 26 publications

References 43 publications

Formulation of nanocellulosic fibres and particle fillers, and their mono and hybrid reinforced polymer composites

Formulation of nanocellulosic fibres and particle fillers, and their mono and hybrid reinforced polymer composites

The effects of seawater and nanosilica on the performance of blended cements and composites

Impact of Hard Magnetic Nanocrystals on the Properties of Hardened Cement Paste

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