Preparation and properties of geopolymer from blast furnace slag

Huang, Xianghua; Yu, Lin; Li, D. W.; Shiau, Yan-Chyuan; Li, S.; Liu, K. X.

doi:10.1179/1432891715z.0000000002210

Cited by 22 publications

(7 citation statements)

References 8 publications

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“…It is known as green material [14], because of its low energy consumption, and low emission of polluting gases during manufacture, which makes it an alternative binder for cementitious materials. Geopolymer is produced from the activation of aluminosilicate materials such as metakaolin [15], blast furnace slag [16], fly ash [17] and so on, by a homogenous solution of alkali hydroxide and alkaline silicate, at ambient conditions [14,18]. The mechanism consists of (1) the dissolution of the aluminosilicate structure under the effect of the alkali hydroxide to form oligomers of silicate [SiO(OH) 3 ] − and aluminate [Al(OH) 4 ] − , and (2) the condensation of these free oligomers under the effect of the alkaline silicate to form another amorphous three-dimensional network [14,18,19].…”

Section: Geopolymersmentioning

confidence: 99%

Incorporation of Phase Change Materials and Application of 3D Printing Technology in the Geopolymer Development

Nmiri¹

2021

Advances in Geopolymer-Zeolite Composites - Synthesis and Characterization

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The building sector accounted for the largest share of both global final energy use and energy-related CO2 emissions. Despite the efforts made during the last decade to reduce energy consumption and greenhouse gas emissions, the demand for energy is increasing steadily. Thus, development of novel strategies to reduce energy costs and save the environment through a new building regulation has critical importance. Several new technologies are emerging to help achieve the aim of reducing energy usage in building sectors, eliminating greenhouse gas emissions, and recycling waste. Some of these technologies are: (1) the development of geopolymer binder that may be used as an alternative to ordinary Portland cement, (2) the adoption of three-dimensional (3D) printing technology in the civil engineering, and (3) the integration of phase change materials (PCM) in cementitious materials to increase energy efficiency of buildings. In this chapter we review some research about phase change materials-based geopolymer cement, and the adoption of the additive manufacturing technology in geopolymer applications, as well as, point to further areas of study required for wide-scale industry adoption.

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Section: Geopolymersmentioning

confidence: 99%

Incorporation of Phase Change Materials and Application of 3D Printing Technology in the Geopolymer Development

Nmiri¹

2021

Advances in Geopolymer-Zeolite Composites - Synthesis and Characterization

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“…Blast furnace slag is composed mainly silicates of calcium, aluminium and magnesium [12][13]. Blast furnace slag has historically been used in blended form with Portland cement for construction purposes [13,[15][16] but has found greener applications in geopolymers [12,[17][18]. Geopolymerisation properties of binders and mortars based on metakaolin and blast furnace slag has been investigated.…”

Section: Synthesis Of Geopolymer Binders and Mortars From Ijero-ekitimentioning

confidence: 99%

Synthesis of geopolymer binders and mortars from Ijero-Ekiti calcined clay, blast furnace slag and river sand

Adeniyi

Ogundiran

2020

EJCS

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Geopolymer, an inorganic polymer is a greener alternative to Portland cement because of less CO2 emissions generated during its synthesis. Main precursors needed for its formation is silica and alumina. Geopolymer source materials are primarily fly ash, blast furnace slag, calcined kaolin clays. Ijero-Ekiti kaolin clay that is rich in silica and alumina is relatively abundant in Nigeria. Hence, the aim of this study was to develop geopolymer binder and mortars using Ijero-Ekiti calcined clay, blast furnace slag and river sand. Chemical and structural characterisation of source materials was determined. Geopolymer binders were synthesised at varying proportions of clay and BFS. The binder that gave the optimum compressive strength was used to prepare geopolymer mortars with sand at varying mix ratios with 8M NaOH/NaSi2O3 solution at ambient temperature. Mechanical, structural and durability properties of the geopolymer products were investigated. FTIR spectrum of Ijero-Ekiti calcined clay showed a disappearance of surface OH groups when compared to its raw clay, confirming the transformation of kaolinite to metakaolinite. The calcined clay was composed mainly of silicon oxide and aluminium oxide. Si-O stretching vibration decreased as the BFS content increased in the binders. The water absorption values substantiated the low porosity of the binders. The geopolymer mortars compressive strength was in accordance with ASTM standard. The results confirmed the suitability of Ijero-Ekiti calcined clay as a geopolymer precursor and its combination with blast furnace slag can be used as a greener alternative to Portland cement.

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“…Application of choline chloride and urea ionic liquids in the selective dissolution Abbott et al, 2006Abbott et al, , 2009 Ponsot and Bernado, 2013; Karayannis et al, 2017), and as geopolymeric materials (Kalinkin et al, 2014;Huang et al, 2015). However, the presence of entrained and/or dissolved toxic metal elements, as well as the build-up of deleterious elements in the slag, is still a major constraint in the recycling and re-use of these materials.…”

Section: Recovery Of Metals From Eaf Dust Usingmentioning

confidence: 99%

Mining and metallurgical wastes: a review of recycling and re-use practices

Matinde

Simate

Ndlovu

2018

J. S. Afr. Inst. Min. Metall.

105

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Mining is a complex process involving activities that range from exploration through mine development, mineral beneficiation, metal extraction, smelting, refining, reclamation, and remediation (Bian et al., 2012; Ndlovu, Simate, and Matinde, 2017). In the process of extracting the metal values, these activities produce significant amounts of wastes, typically consisting of (1) solid wastes in the form of waste rock, dusts, sludges, and slags, (2) liquid wastes in the form of waste water and effluents, and (3) gaseous emissions. In South Africa, mining and metallurgical wastes constitute one of the biggest challenges to the environment. If not managed properly, the anthropogenic effects of these mining and metal extraction activities can result in irreversible damage to the environment and a hazard to humans. In South Africa, in particular, these types of wastes are usually disposed of in landfills, thereby creating serious environmental and health challenges for communities. Mitigating the effects of such mining, metallurgical, and metal manufacturing processes requires a holistic waste management approach that incorporates reduction in the amount of waste

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Preparation and properties of geopolymer from blast furnace slag

Cited by 22 publications

References 8 publications

Incorporation of Phase Change Materials and Application of 3D Printing Technology in the Geopolymer Development

Incorporation of Phase Change Materials and Application of 3D Printing Technology in the Geopolymer Development

Synthesis of geopolymer binders and mortars from Ijero-Ekiti calcined clay, blast furnace slag and river sand

Mining and metallurgical wastes: a review of recycling and re-use practices

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