Beneficial role of nanosilica in cement based materials – A review

Singh, Latika; Karade, S.R.; Bhattacharyya, S. K.; Yousuf, M.M.; Ahalawat, Saurabh

doi:10.1016/j.conbuildmat.2013.05.052

Cited by 578 publications

(242 citation statements)

References 80 publications

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“…Similarly, it can be observed that with the addition of SF and SNPs, C/S ratio found 1.87 and 1.5, respectively, due to the pozzolanic effect, which consume CH and formed C-S-H of lower C/S ratio. Although the literature suggests that the pozzolanic materials could deliver low C/S ratio (Singh et al 2013). It could be noticed that as a result of low C/S ratio produced by SNPs addition, promote the development of denser microstructure.…”

Section: Sem and Elemental Composition Analysismentioning

confidence: 99%

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Hydration Studies of Cementitious Material using Silica Nanoparticles

Singh

Goel

Bhattacharyya

et al. 2015

ACT

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In the present study, non-evaporable water (NEW) and degree of hydration (DOH) of cement paste in the presence of silica nanoparticles (SNPs) and silica fume (SF) have been investigated. The incorporation of SNPs increased the NEW content due to the formation of more amount of hydration products. On the basis of NEW content, DOH was also calculated at different time intervals and it was found to increase from 28% to 85% in SNPs modified cement, while with the addition of SF increment was 74% at 56 days of hydration. In addition, capillary porosity of SNPs incorporated cement paste was also calculated and observed ~75% reduction as compared to plain cement. These results attributed that the SNPs refines the pore structure as a result of pozzolanic reaction and formation of additional calcium-silicate-hydrate (C-S-H). FTIR results show the appearance of bridging silicate tetrahedral (Q 2 ), characteristic peak at 970 cm -1 and a hump at ~1108 cm -1 due to the formation of polymerised C-S-H. The microstructure studies through SEM revealed that the SNPs refined the pore structure of the cement paste leading to denser microstructure as a result of more polymerized C-S-H gel formation, desirable for high strength and durability.

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Section: Sem and Elemental Composition Analysismentioning

confidence: 99%

“…The pozzolanic reaction consumes CH, leading to the formation of a polymerised C-S-H of low Ca/Si ratio (Singh et al 2013). The densification of the C-S-H with the increase in the degree of hydration (α), the bulk density of C-S-H increases (1.8 to 2.1g/cm 3 ).…”

Section: Introductionmentioning

confidence: 99%

Hydration Studies of Cementitious Material using Silica Nanoparticles

Singh

Goel

Bhattacharyya

et al. 2015

ACT

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“…Portlandite is futher reacts with pozzolans and hence, producing extra C-S-H paste into the system. The followings are reactions occur in pozzolanic reaction mechanism [17].…”

Section: Mechanism Of Reactionmentioning

confidence: 99%

Pozzolanic Reaction Mechanism of Rice Husk Ash in Concrete – A Review

Saad

Nuruddin

Shafiq

et al. 2015

AMM

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Abstract.Recently, incorporation of cement replacement material (CRM) in concrete has gained considerable attention throughout the world. It is known that the commonly used CRM in current concrete industry is silica fume (SF), pulverized fuel ash (PFA) and rice husk ash (RHA). RHA is an agricultural waste from rice milling process. Rice farming activities is one of the main crops planted in Malaysia and therefore, the rice husk abundantly generated every year. RHA exhibits positive pozzolanic reaction during concrete strength development. The material contains amorphous silica and hence it contributed towards enhancement of various concrete properties. This paper presents a short review of RHA properties as CRM and pozzolanic reaction determination.

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“…A lot of research using Nano-materials such as Nano-silica (nano-Si02) and Nano-titanium (nano-Ti02) oxide but there are few studies on incorporating of Nano-iron (nano-Fe203), Nano-alumina (nano-A1203) and Nano clay particles [15]. Among all the Nano-materials, Nano-silica is the most broadly used material as a replacement for the cement and concrete to improve their performance because of its pozzolanic reactivity besides the pore-filling effect [16]. Nano-silica can act as a Nano-filler to fill up the spaces between particles of gel of calcium-silicate-hydrates (C-S-H).…”

Section: Strength ( M a ) Flexuralmentioning

confidence: 99%

Porous Concrete Pavement Containing Nano-Silica: Pre-Review

Ramadhansyah

Ibrahim

Rosli

et al. 2014

AMR

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Porous concrete pavement is being used as one of the solution to decrease the storm water runoff by capturing and allowing rain water to drain into the land surface. The main problem of porous concrete pavement is the strength itself. The objective of this paper is to review the use and performance of Nano-silica in porous concrete pavement. From the literature review of the previous research, it was found that the conventional porous concrete pavement doesn't has good strength for pavement purpose. An addition of Nano-material will improve the physical and chemical properties of the porous concrete pavement.

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Beneficial role of nanosilica in cement based materials – A review

Cited by 578 publications

References 80 publications

Hydration Studies of Cementitious Material using Silica Nanoparticles

Hydration Studies of Cementitious Material using Silica Nanoparticles

Pozzolanic Reaction Mechanism of Rice Husk Ash in Concrete – A Review

Porous Concrete Pavement Containing Nano-Silica: Pre-Review

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