Durability properties of high volume fly ash concrete containing nano-silica

Supit, Steve W.M.; Shaikh, Faiz Uddin Ahmed

doi:10.1617/s11527-014-0329-0

Cited by 209 publications

(73 citation statements)

References 22 publications

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“…Very fine grains of nanosilica act as nucleation centres for precipitating products; thus, hydration of cement is accelerated [87,89]. Interfacial transition zone is improved and compressive strength of final material is enhanced as a result of action of this additive despite its small amount used [87,92,95]. However, it should be indicated that very fine particles of nanosilica tend to agglomerate.…”

Section: Silica and Aluminosilicate Pozzolanic Materialsmentioning

confidence: 99%

“…Supit and Shaikh [95] investigated influence of small addition of nanosilica on concrete composed of 40 or 60% of fly ash (as cement replacement). They reported that in case of composite containing the highest amount of fly ash, small addition of nanosilica results in improvement in early (3-day) compressive strength while on later ages this parameter was almost the same as for concrete without nanosilica.…”

Section: Silica and Aluminosilicate Pozzolanic Materialsmentioning

confidence: 99%

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Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Wilińska

Pacewska

2018

J Therm Anal Calorim

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Binders containing fly ash as cement substitute have been used for many years. Typical amount of fly ash in cement composite does not exceed 35% of mass of binder. Replacement of substantial amount of cement mass by fly ash results in retardation of hydration of binder and deterioration of some concrete properties, e.g. delay in setting time and reduction in early compressive strength. These inconveniences may be reduced using proper method of activation. In this paper, possibilities to activate binding mixtures containing high and very high amount of fly ash and low amount of Portland cement were discussed basing on the literature reports as well as on our own research results. Several activating methods were described, such as mechanical activation, exchanging of part of components of binder (cement, fly ash or both of them) by more reactive fine-grained material, chemical activation by the use of alkaline activators as well as combined methods. Possibilities of using these methods were discussed in relation to amount of fly ash introduced as replacement of cement and kind of fly ash used. Usefulness of calorimetry and thermal analysis methods was also presented.

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Section: Silica and Aluminosilicate Pozzolanic Materialsmentioning

confidence: 99%

Section: Silica and Aluminosilicate Pozzolanic Materialsmentioning

confidence: 99%

Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Wilińska

Pacewska

2018

J Therm Anal Calorim

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“…From their investigation, it has been concluded that the presence of ALC improved the properties of geopolymer concrete both in the fresh and hardened state of concrete. S. W. M. Supit et al, [11] have conducted an experimental investigation on durability properties of high volume FA based concrete containing NS at 2% and 4%. They have concluded that the strength has improved by the addition of 2 % NS and it also significantly reduced the water absorption, sorptivity, porosity and chloride permeability of FA based concrete mix having 38% FA.…”

Section: Literature Reviewmentioning

confidence: 99%

Study on effect of colloidal Nano silica blended con-crete under compression

Reddy

Meena

2018

IJET

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Ternary Blended Concrete (TBC) with Nano-Silica (NS) is receiving special attention because of its ability to improve the performance of concrete as compared with the control concrete. The present investigation deals about the behavior of TBC produced, using Fly Ash (FA) and Alccofine (ALC) as a partial replacement for cement along with four different types of colloidal NS (CemSynXLP, CemSynXTX, CemSynXFX, CemSynXTXla) as additives. The compressive strength of M30 grade of TBC was tested after 7, 14 and 28 days of curing. From the study, it has been found that the TBC mix with 25% replacement for cement (FA at 15% and ALC at 10%) and with addition of 1% CemSynXTXla type of NS as an additive has achieved higher strength than all other types of TBC mixes.

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“…Fly ash is commonly known as a pozzolana with very poor hydraulic properties; however, it accelerates the hydration of cement thanks to its surface absorption effect and heterogeneous nucleation [23][24][25]. erefore, fly ash may improve the mechanical properties and strength of cement-based materials [26][27][28]. In addition, fly ash particles may improve the workability of the fresh cement paste, thanks to their spherical particle geometry [29].…”

Section: Introductionmentioning

confidence: 99%

The Optimization of Calcareous Fly Ash-Added Cement Containing Grinding Aids and Strength-Improving Additives

Kaplan

Yıldızel

Memiş

et al. 2018

Advances in Civil Engineering

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is is an experimental study which explores the physical, mechanical, and economic factors involved in the production of type CEM II A-B/W cement. In this context, 4 cement additives were used in two different dosages (200 and 800 g/t). Class C fly ash was used for composite cement production at ratios of 5%, 20%, and 35%. It was shown that Blaine fineness increases with the increasing fly ash content. e use of fly ash at ratios of 5% and 20% was not found to have any unfavorable effects on the compressive strength at the early days. It is found that the use of additive for improving the early-age strength is preferable when fly ash is used. It is possible to produce Class 52.5 N cement using additives to improve early strength and 20% fly ash. Loss in strength was observed in cement mortars produced using glycol-based grinding aid. Increasing the dosage of chemical additive also led to loss in strength due to nonhomogeneous distribution of hydration products. As a result, grinding fly ash with clinker and the use of cement chemicals contribute to the cement sector in terms of sustainability. It is possible to produce cements with improved mechanical properties especially with the use of 20% fly ash.

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Durability properties of high volume fly ash concrete containing nano-silica

Cited by 209 publications

References 22 publications

Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Study on effect of colloidal Nano silica blended con-crete under compression

The Optimization of Calcareous Fly Ash-Added Cement Containing Grinding Aids and Strength-Improving Additives

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