Utilization of Ferronickel Slag as Additive in Portland Cement: A Hydration Leaching Study

“…The study also showed that the use of ground FNS as part of the binder similar water demand as for the control mix. Similarly, Katsiotis et al (2015) concluded that the presence of FNS slowed down the hydration process and the strength development in FNS blended concrete. In addition, the authors reported an increase of compressive strength at later stages of curing due to the effect pozzolanic reaction of FNS.…”

Section: Performance Of Ground Fns As Binder In Concretementioning

confidence: 95%

Value added utilization of by-product electric furnace ferronickel slag as construction materials: A review

Saha

Khan

Sarker

2018

Resources, Conservation and Recycling

134

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This paper reviews the potential use of electric furnace ferronickel slag (FNS) as a fine aggregate and binder in Portland cement and geopolymer concretes. It has been reported that the use of FNS as a fine aggregate can improve the strength and durability properties of concrete. Use of some FNS aggregates containing reactive silica may potentially cause alkalisilica reaction (ASR) in Portland cement concrete. However, the inclusion of supplementary cementitious materials (SCM) such as fly ash and blast furnace slag as partial cement replacement can effectively mitigate the ASR expansion. When finely ground FNS is used with cement, it shows pozzolanic reaction, which is similar to that of other common SCMs such as fly ash. Furthermore, 20% FNS powder blended geopolymer showed greater strength and durability properties as compared to 100% fly ash based geopolymers. The utilization of raw FNS in pavement construction is reported as a useful alternative to natural aggregate. Therefore, the use of by-product FNS in construction industry will be a valuable step to help conservation of natural resources and add sustainability to infrastructures development. This paper presents a comprehensive review of the available results on the effects of FNS in concrete as aggregate and binder, and provides some recommendations for future research in this field.

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“…The manufacture of one tonne of ferronickel alloy discharges around four tonnes of FNS, which is described as an amorphous material due to the cooling process in water. Katsiotis et al (2015) studied the hydration process and the leachability of blended cement containing ground FNS. Importantly, the heavy metal concentrations in leachates from FNS specimens were below the limits proposed by the United States Environmental Protection Agency (EPA).…”

Section: Introductionmentioning

confidence: 99%

“…As a result, FNS is classified as non-hazardous waste and is suitable for use in the construction industry. FNS has also been categorized as non-hazardous waste according to the European Catalogue for Hazardous Wastes (Katsiotis et al 2015;Dourdounis et al 2004;Lemonis et al 2015). The non-hazardous characteristic of FNS provides opportunities to develop new applications for FNS in the construction industry allowing recycling this industrial by-product and reducing the consumption of natural resources such as natural sand.…”

Section: Introductionmentioning

confidence: 99%

Mitigating the Risk of Early Age Cracking in Fly Ash Blended Cement-Based Concrete Using Ferronickel Slag Sand

Nguyen

Khan

et al. 2019

ACT

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A concrete mix (FNS25) including 50% natural sand replacement by ferronickel slag (FNS) sand and 25% ordinary portland cement (OPC) substitution by fly ash (FA) was considered to mitigate the risk of early-age cracking in fly ash blended cement-based concrete. Experiments were carried out to accurately quantify early-age shrinkage and tensile creep and assess their influence on early-age cracking in reinforced concrete members. The results show the free shrinkage strain is not influenced by either fly ash or FNS significantly, whereas the tensile creep of FNS25 is significantly larger than that of both OPC100 and FA20. Both restrained ring test and simulations on reinforced concrete members confirm that partly replacing conventional sand by FNS sand reduces the risk of early-age cracking. Microstructural analysis of the Interface Transition Zone (ITZ) of FNS sand shows that excess in Portlandite is absent in FNS sand ITZ leading to a higher early-age tensile strength of FNS25 concrete.

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Utilization of Ferronickel Slag as Additive in Portland Cement: A Hydration Leaching Study

Cited by 82 publications

References 10 publications

Hydration study of ternary blended cements containing ferronickel slag and natural pozzolan

Hydration study of ternary blended cements containing ferronickel slag and natural pozzolan

Value added utilization of by-product electric furnace ferronickel slag as construction materials: A review

Mitigating the Risk of Early Age Cracking in Fly Ash Blended Cement-Based Concrete Using Ferronickel Slag Sand

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