Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I

Singh, Latika; Bhattacharyya, S. K.; Shah, Surendra P.; Mishra, G.; Ahalawat, Saurabh; Sharma, U.

doi:10.1016/j.conbuildmat.2014.08.046

Cited by 103 publications

(30 citation statements)

References 39 publications

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“…This finding may be explaining the present results in our work. Nano silica addition significantly alters the proportion of low and high stiffness C-S-H. A similar result was reported by Singh et al, [11].…”

Section: Effect Of Nano -Silica Contentsupporting

confidence: 88%

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Effect of Nano-Silica, Silica Fume, Cement Content and Curing Conditions on the Concrete Compressive Strength at 7 and 28 Days

Ahmad

Yousry

El-Mahdy

2017

Journal of Al-Azhar University Engineering Sector

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Recently there is a strong trend in engineering researches in the field of engineering materials for the production of high and ultra-high strength concrete. Using different additives which are added to the concrete mix reduced the water cement ratio and caused an increase in the concrete strength. As well as the use of ultra-fine materials such as Nano-silica increase the strength of concrete dramatically. In spite of the success of this research to get to compressive strength up to 150 MPa or more, however, many problems have found in the mechanical behavior of these concretes, which turned into a decrease in the fracture toughness significantly. An experimental program was designed to investigate the effect of cement content, silica fume and Nano silica percent, and curing on the compressive strength of concrete at different curing ages. The results of the present work clearly showed an increase in the value of 28-day concrete compressive strength with existence of silica and Nano silica. Steam curing, also, led to an improvement in compressive strength as compared to water curing.

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Section: Effect Of Nano -Silica Contentsupporting

confidence: 88%

“…The nano-SiO2 mainly contributed to the early strength development of UHSC before 7 d. The CH content in UHSC series dropped significantly with the increase of nano-SiO2 content. Nano-SiO2 demonstrated nucleation and filling effects and resulted in less porous and more homogeneous structure [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano-Silica, Silica Fume, Cement Content and Curing Conditions on the Concrete Compressive Strength at 7 and 28 Days

Ahmad

Yousry

El-Mahdy

2017

Journal of Al-Azhar University Engineering Sector

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“…Thus, it was concluded that BGWNP was useful for improving AAMs in terms of microstructure characteristics and strength performance. The capacity of hydration products to make a bulk paste matrix denser and to improve the mechanical qualities and durability of mortars with nano-powder content was confirmed by Singh and colleagues as well [66]. C-S-H gel (%) = Total LOI -LOI CH -LOI CC (5),…”

Section: Tga and Dtg Analysismentioning

confidence: 77%

Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

et al. 2020

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The recycling of millions of tons of glass bottle waste produced each year is far from optimal. In the present work, ground blast furnace slag (GBFS) was substituted in fly ash-based alkali-activated mortars (AAMs) for the purpose of preparing glass bottle waste nano-powder (BGWNP). The AAMs mixed with BGWNP were subsequently subjected to assessment in terms of their energy consumption, economic viability, and mechanical and chemical qualities. Besides affording AAMs better mechanical qualities and making them more durable, waste recycling was also observed to diminish the emissions of carbon dioxide. A more than 6% decrease in carbon dioxide emissions, an over 16% increase in compressive strength, better durability and lower water absorption were demonstrated by AAM consisting of 5% BGWNP as a GBFS substitute. By contrast, lower strength was exhibited by AAM comprising 10% BGWNP. The conclusion reached was that the AAMs produced with BGWNP attenuated the effects of global warming and thus were environmentally advantageous. This could mean that glass waste, inadequate for reuse in glass manufacturing, could be given a second life rather than being disposed of in landfills, which is significant as concrete remains the most commonplace synthetic material throughout the world.

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“…The nano-silica particles were not observed in 50% CNS gypsum because gypsum and portlandite were consumed by the formation of ettringite by the pozzolanic reaction [8,20,27,31]. The pozzolanic reaction is further promoted as the number of nano-silica particles increased [49][50][51][52]. However, as shown in Figure 5b, there was no change in the size of the C-S-H peak from 1-day to 28-days, even in case of the 50% CNS specimen.…”

Section: Compressive Strengthmentioning

confidence: 93%

Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method

et al. 2019

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This study applies a new method of mixing colloidal nano-silica (CNS). Previous studies have used powdered nano-silica or colloidal nano-silica and applied a binder weight substitution method. In this study, we tried to use ordinary Portland cement (OPC) as a binder and replace CNS with weight of mixing water. CNS was replaced by 10%, 20%, 30%, 40%, and 50% of the mixing water weight. The flow value, setting time, compressive strength, hydration reactant (X-ray diffractometer; XRD), pore structure (mercury intrusion porosimetry; MIP), thermal analysis, and scanning electron microscopy (SEM) analysis were performed. Experimental results show that the new substitution method improves the mechanical and microstructural properties through two effects. One is that the weight substitution of the mixing water shows a homogeneous dispersion effect of the nano-silica particles. The other is the effect of decreasing the w/b ratio when the CNS is substituted because the CNS is more dense than the mixing water. Therefore, we confirmed the applicability of mixing water weight replacement method as a new method of mixing CNS.

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Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I

Cited by 103 publications

References 39 publications

Effect of Nano-Silica, Silica Fume, Cement Content and Curing Conditions on the Concrete Compressive Strength at 7 and 28 Days

Effect of Nano-Silica, Silica Fume, Cement Content and Curing Conditions on the Concrete Compressive Strength at 7 and 28 Days

Influence of Glass Silica Waste Nano Powder on the Mechanical and Microstructure Properties of Alkali-Activated Mortars

Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method

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