Mechanical and chemical analysis of one-part geopolymers synthesised with iron ore tailings from Brazil

Figueiredo, Ricardo Augusto Martins; Silveira, Ana B.M.; Melo, Eduardo L.P.; Costa, Gabriel Q.G.; Brandão, Paulo Roberto Gomes; Aguilar, Maria Teresa Paulino; Henriques, Andréia Bicalho; Mazzinghy, Douglas Batista

doi:10.1016/j.jmrt.2021.07.153

Cited by 29 publications

(16 citation statements)

References 32 publications

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“…Mine tailings are a waste material from the mining industry generated during the separation of valuable minerals from invaluable waste [45]. Recent investigations on one-part AAMs used gold mine tailings (GMT), iron ore mine tailings (IMT), lead-zinc mine tailings (LZMT), and vanadium tailings (VT) as precursors [46][47][48][49][50]. GMTsa waste material from mining goldmainly consist of SiO 2 and Al 2 O 3 , and their mineral phase structure is highly crystalline with peaks including quartz, albite, microcline, and muscovite [51].…”

Section: Mine Tailingsmentioning

confidence: 99%

“…1 [52]. IMTs, meanwhile, show chemical compositions that are rich in SiO 2 and Fe 2 O 3 , and have a crystalline phase structure with peaks including quartz, muscovite, and hematite [47]. LZMT were mainly used as supplementary precursors in one-part AAMs and their mineral phase structure consists of quartz, as well as calcite, pyrite and dolomite [48].…”

Section: Mine Tailingsmentioning

confidence: 99%

See 1 more Smart Citation

One part alkali activated materials: A state-of-the-art review

El-Zeadani

Bompa

Elghazouli

2022

Journal of Building Engineering

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Section: Mine Tailingsmentioning

confidence: 99%

Section: Mine Tailingsmentioning

confidence: 99%

One part alkali activated materials: A state-of-the-art review

El-Zeadani

Bompa

Elghazouli

2022

Journal of Building Engineering

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“…For these reasons, Fe is considered incompatible with GPs at elevated temperatures (above 800 °C). ,, GPs with higher iron oxide contents also show lower acid resistance, even when compared to OPCs . With regards to mechanical properties, some recent studies have reported higher compressive, flexural, and tensile strengths of iron-bearing GPs, which has been ascribed to the filler effects of iron oxides and the combined action of polysialates, iron-silicates, and ferro-sialates (Fe(−Al)–S–H). ,,− Other studies, however, have shown that iron can negatively impact GP properties through the rapid precipitation of Fe species due to the higher atomic size of Fe compared to Si or Al, causing more rapid consumption of OH – , which in turn results in deceleration of the dissolution of the remaining precursor and inhibition of the geopolymerization and thus reduced strength of the system. ,, However, as shown by Davidovits, these negative impacts of elevated Fe contents on GP properties may be suppressed, as they achieved improved mechanical durability of GPs even with extremely high quantities of iron. Therefore, the role of Fe has not been fully understood, especially with respect to the CO 2 resistivity of the Fe-containing systems, and further research is required.…”

Section: Factors Affecting the Properties Of Gpsmentioning

confidence: 99%

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives

et al. 2023

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Wellbores used in underground production and storage activities, including carbon capture and storage (CCS), are typically sealed using sealants based on Ordinary Portland Cement (OPC). However, leakage along these seals or through them during CCS operations can pose a significant threat to long-term storage integrity. In this review paper, we explore the potential of geopolymer (GP) systems as alternative sealants in wells exposed to CO 2 during CCS. First, we discuss how key parameters control the mechanical properties, permeability, and chemical durability of GPs based on different starting materials as well as their optimum values. These parameters include the chemical and mineralogical composition, particle size, and particle shape of the precursor materials; the composition of the hardener; the chemistry of the full system (particularly the Si/Al, Si/(Na+K), Si/Ca, Si/Mg, and Si/Fe ratios); the water content of the mix; and the conditions under which curing occurs. Next, we review existing knowledge on the use of GPs as wellbore sealants to identify key knowledge gaps and challenges and the research needed to address these challenges. Our review shows the great potential of GPs as alternative wellbore sealant materials in CCS (as well as other applications) due to their high corrosion durability, low matrix permeability, and good mechanical properties. However, important challenges are identified that require further research, such as mix optimization, taking into account curing and exposure conditions and available starting materials; the development of optimalization workflows, along with building larger data sets on how the identified parameters affect GP properties, can streamline this optimization for future applications.

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“…A practical example of the above is the study carried out by Figueiredo et al [116], where a commercial metakaolin (MK) based geopolymeric cement was prepared as precursor material, and sodium silicate, Na2SiO3, (SS), and sodium hydroxide, NaOH, (SH) as activators. Three different iron ore tailings (IOT), obtained from flotation processes of three mines located in the province of Quadrilátero Ferrífero, in the state of Minas Gerais, Brazil, were added to the above, to use the mine tailings as filler.…”

Section: Figurementioning

confidence: 99%

Recycling and Reuse of Mine Tailings: A Review of Advancements and Their Implications

Araujo¹,

Llano²,

Nunes³

2022

Preprint

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Mining is an important industry, accounting for 6.9% of global GDP. However, global development promotes accelerated demand, resulting in the accumulation of hazardous waste in land, sea, and air environments. It reached 7 billion tonnes of mine tailings generated yearly worldwide, and 19 billion solid tailings will be accumulated by 2025. Adding to this, the legacy of environmental damage from abandoned mines is worrying; in Canada there are around 10,000 abandoned mines, 50,000 in Australia, 6,000 in South Africa, and 9,500 coal mines in China, reaching 15,000 by 2050. In this scenario, restoration techniques from mining tailing have become increasingly discussed among scholars due to their potential to offer benefits towards reducing tailings levels, thereby reducing environmental pressure for the correct management and adding value to previously discarded waste. This review paper explores available literature on the main techniques of mining tailing recycling and reuse and discusses leading technologies, including the benefits and limitations, as well as emerging prospects. The findings of this review serve as a supporting reference for decision-makers concerning the related sustainability issues associated with mining, mineral processing, and solid waste management.

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Mechanical and chemical analysis of one-part geopolymers synthesised with iron ore tailings from Brazil

Cited by 29 publications

References 32 publications

One part alkali activated materials: A state-of-the-art review

One part alkali activated materials: A state-of-the-art review

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives

Recycling and Reuse of Mine Tailings: A Review of Advancements and Their Implications

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Mechanical and chemical analysis of one-part geopolymers synthesised with iron ore tailings from Brazil

Cited by 29 publications

References 32 publications

One part alkali activated materials: A state-of-the-art review

One part alkali activated materials: A state-of-the-art review

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO2 Exposure and Perspectives

Recycling and Reuse of Mine Tailings: A Review of Advancements and Their Implications

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Product

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Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives