Experimental study on strength and microstructure of mortar in presence of micro and nano-silica

Garg, Rishav; Garg, Rajni; Bansal, Manjeet; Aggarwal, Yogesh

doi:10.1016/j.matpr.2020.06.167

Cited by 27 publications

(20 citation statements)

References 28 publications

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“…NS may be gel, precipitated, or pyrogenic [82]. Colloidal NS is composed of amorphous hydroxylated silica particles ranging in size from 1-500 nm in an aqueous solution [83]. The micrograph of NS is depicted in Figure 4.…”

Section: Properties Of Nano-silicamentioning

confidence: 99%

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

et al. 2022

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Several review studies have been performed on nano-silica-modified concrete, but this study adopted a new method based on scientometric analysis for the keywords’ assessment in the current research area. A scientometric analysis can deal with vast bibliometric data using a software tool to evaluate the diverse features of the literature. Typical review studies are limited in their ability to comprehensively and accurately link divergent areas of the literature. Based on the analysis of keywords, this study highlighted and described the most significant segments in the research of nano-silica-modified concrete. The challenges associated with using nano-silica were identified, and future research is directed. Moreover, prediction models were developed using data from the literature for the strength estimation of nano-silica-modified concrete. It was noted that the application of nano-silica in cement-based composites is beneficial when used up to an optimal dosage of 2–3% due to high pozzolanic reactivity and a filler effect, whereas a higher dosage of nano-silica has a detrimental influence due to the increased porosity and microcracking caused by the agglomeration of nano-silica particles. The mechanical strength might enhance by 20–25% when NS is incorporated in the optimal amount. The prediction models developed for predicting the strength of nano-silica-modified concrete exhibited good agreement with experimental data due to lower error values. This type of analysis may be used to estimate the essential properties of a material, therefore saving time and money on experimental tests. It is recommended to investigate cost-effective methods for the dispersion of nano-silica in higher concentrations in cement mixes; further in-depth studies are required to develop more accurate prediction models to predict nano-silica-modified concrete properties.

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Section: Properties Of Nano-silicamentioning

confidence: 99%

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

et al. 2022

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“…The common feature of M4, M8 and M12 is that they contain 15% CT. This decrease in strength is thought to be due to the decrease in the homogeneity of the cement matrix at the higher CT content (Garg et al 2020).…”

Section: Characterization Of Ctmentioning

confidence: 99%

“…This situation can be explained by the higher SiO 2 content of NS and smaller particle size than MS. It is also known from the literature that NS substitution increases the compressive strength(Garg et al 2020;Seifan et al 2020). NS is more effective in pozzolanic reaction with CSH gel than MS(Garg et al 2020).…”

mentioning

confidence: 92%

“…It is also known from the literature that NS substitution increases the compressive strength(Garg et al 2020;Seifan et al 2020). NS is more effective in pozzolanic reaction with CSH gel than MS(Garg et al 2020). 2% NS substitution increased compressive strength by 6.84% at day 28 compared to reference cement.…”

mentioning

confidence: 92%

“…NS tends to agglomerate higher than other pozzolanic materials(Garg et al 2020). For this reason, the amount of NS used in the study was preferred as 2%.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Characterization of Copper Tailings In Murgul Copper Plant (Artvin/Turkey) And Utilization Potential In Cement Mortar With Nano And Micro Silica

Kara

2021

Preprint

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Due to the increasing demand for copper day by day, copper tailings (CT) are the wastes that mining and human-induced activities caused have become a problem all over the world due to the increasing demand for copper. This study evaluates the effect of using CT together with nano silica (NS) and micro silica (MS) in mortars as a partial substitution for cement on mechanical strength properties. Physical, morphological, chemical, mineralogical thermo gravimetric analyzes of CT have been made. In addition, heavy metal concentrations were determined. The mechanical features of the mortars produced by replacing by weight with different proportions of (5%, 10%, 15%) CT, 2% NS and 10% MS cement were determined. As a result, it has been observed that the sum of SiO2, Al2O3 and Fe2O3 of the CT, which has a mostly crystalline structure, is 91.40% and its ignition loss is 4.04%. An improvement in compressive strength (compared to the reference mixture) was observed with the use of 5% CT. Up to 10% of CT has provided standard compressive strength values in both NS and MS combinations.

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Cement-Based with Partial Replacement of Nano-Silica for Improvement in Compressive Strength

Mahmud,

Aadnan,

Daud

et al. 2023

Lecture Notes in Mechanical Engineering

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This study aims to utilize nano-silica in cement paste to improve the strength of hardened cement-based materials, and to determine the most significant percentage of addition based on improvement in compressive strength as well as to relate it with formation of hydration products. Nano-silica used had been synthesized from rice husk ash (RHA) by precipitation method. The synthesized powder consists of ~ 99% amorphous silica particles in the size range of 74 nm to 93 nm. Nanosilica had partially replaced some amount of cement in percentage of 0%, 1%, 3% and 5%. At each curing duration of 7 and 28 days, the hardened cement-based samples were collected and characterized through compression test and XRD analysis. Significant increments were observed in compressive strength of cement-based materials upon the addition of nano-silica. This study found that addition of 3% nano-silica resulted in the highest improvement in compressive strength compared to the other samples with and without addition of nano-silica throughout the curing duration. Addition beyond this value resulted in the significant decrement in compressive strength at all curing duration. Meanwhile, XRD analysis indicates the presence of hydration products such as Ca(OH)2 and C-S-H at different intensities. Upon addition of nano-silica, the decrement in peak intensity of Ca(OH)2 and increment in peak intensity of C-S-H were obvious which maximised at 28 days of curing. This indicates the presence of nano-silica promotes hydration reaction and produce more hydration products which responsible to a significant improvement in compressive strength of cement-based samples at all curing duration.

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Experimental study on strength and microstructure of mortar in presence of micro and nano-silica

Cited by 27 publications

References 28 publications

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

Characterization of Copper Tailings In Murgul Copper Plant (Artvin/Turkey) And Utilization Potential In Cement Mortar With Nano And Micro Silica

Cement-Based with Partial Replacement of Nano-Silica for Improvement in Compressive Strength

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