Influence of nano-TiO2, nano-Fe2O3, nanoclay and nano-CaCO3 on the properties of cement/geopolymer concrete

Abdalla, Jamal A.; Thomas, Blessen Skariah; Hawileh, Rami A.; Yang, Jian; Jindal, Bharat Bhushan; Ariyachandra, Erandi

doi:10.1016/j.clema.2022.100061

Cited by 63 publications

(25 citation statements)

References 88 publications

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“…Hydration of cement in presence of NC [52] It gradually reduces setting times and the workability. It increases the flexural, splitting, compressive, and bond strength and at the same time reduces chloride penetration, water sorptivity and acid attack [51].…”

Section: Effect Of Nano-caco3 (Nc)mentioning

confidence: 99%

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Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Singh

2023

Emerging Nanomaterials and Their Impact on Society in the 21st Century

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The construction industry uses a lot of binding materials. One of the most important binders is cement and concrete. Most used cement in concrete is Portland cement (OPC). Its manufacture consumes lot of raw materials and energy and emits huge amounts of hazardous gases particularly CO2 into the atmosphere. Attempts are being made to overcome the above problems by using blended cements, geopolymer and LC3 cements. However, there are a number of limitations in using alternatives to OPC. In recent years researches are being carried out to use nanomaterials such as nano silica, nano titanium oxide, nano alumina, nano CaCO3, nano clay, nano carbons, etc. in cement and concrete to improve the properties. The basic objectives of using nanomaterials in binding materials are to increase mechanical properties and durability. Nanomaterials, if added in appropriate amounts, accelerate the hydration, increase mechanical properties and decrease the porosity. In addition to improving physical properties, nanomaterials particularly nano TiO2 acts as a cleaning agent. Nano embedded phase change materials perform better. Since it is a new field, little work has been done so far. In the present chapter the effect of different nanomaterials on the properties of OPC, concrete, geopolymer cement and LC3 cement have been discussed at length.

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Section: Effect Of Nano-caco3 (Nc)mentioning

confidence: 99%

“…It improves workability of concrete, mechanical properties and electrical resistivity. At the same time it reduces chloride penetration, water absorption, and sulfate attack [51].…”

Section: Effect Of Nano-fe2o3mentioning

confidence: 99%

Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Singh

2023

Emerging Nanomaterials and Their Impact on Society in the 21st Century

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“…Anatase TiO2 NPs are semiconductors with high bandwidth because of which they're used in dye-sensitized solar cells (DSSCs) [57]. It is used as a coating material to protect it from corrosion because of its adhesion ability and ability to withstand high temperatures due to its high melting point, reaching 1840°C [58]. Because of its band gap values, Nano-TiO2 can absorb UV rays in the range of 220-400 nm, so it is used as a UV protection material [59].…”

Section: Nano-tio2 Applicationmentioning

confidence: 99%

Synthesis Methods and Applications of TiO2 based Nanomaterials

Jawad¹,

Lua’i²,

Lua’i³

et al. 2022

ANJS

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Nanomaterials or nanoparticles (NPs) are nano-size particles with a (1-100) nm dimension, they show unique properties such as magnetic, electronic, optical, and activating effects. That is why NPs have many applications. Titanium dioxide (TiO2) or Titania based nanoparticals are commonly used NPsdue to their medical and industrial applications. TiO2NPs are used in photodynamic therapy (SDT) and drug delivery due to their non-toxicity. In this review paper we will show some of the types, synthesis methods, and applications of nano-TiO2.

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“…Diversos autores [15][16][17][18] avaliaram como esses tipos de minerais influenciam na resistência à compressão de materiais geopoliméricos, entretanto as conclusões divergem. ESSAIDI et al [19] e ZAILANI et al [20] investigaram o efeito do mineral hematita nas propriedades mecânicas de geopolímero à base de metacaulim e cinza volante, respectivamente.…”

Section: Introductionunclassified

Estudo do desempenho mecânico de geopolímero produzido com auto teor de ferro

et al. 2023

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RESUMO A característica mais comum dos cimentos geopoliméricos é que eles contêm uma quantidade relativamente pequena de óxidos de ferro. Isso se deve ao fato de que vários cientistas desconfiam da ação nociva de alguns compostos ferrosos no desenvolvimento da reação geopolimérica. Para alguns pesquisadores o Fe pode interferir negativamente no processo de geopolimerização do material, enquanto que, em alguns novos estudos o papel do Fe tem revelado resultados interessantes. No intuito de verificar a resistência mecânica alcançada pelo geopolímero obtido a partir do rejeito da lavagem da bauxita, que possui em sua composição alto teor de ferro, a presente pesquisa pretende utilizar 100% dessa matéria-prima calcinada como precursor, e reagentes como o NaOH e Na2SiO3 como ativadores no processo. Todos os materiais foram caracterizados perante suas propriedades físicas e mineralógicas, a fim de possibilitar a correta dosagem dos materiais. Com os geopolímeros obtidos, avaliou-se a resistência a compressão, variando a concentração de NaOH em 8 M e 10 M para diferentes tempos de cura (7 e 28 dias). Análise de difração de raios X (DRX), Espectroscopia de Infravermelho com Transformada de Fourier (FTIR), análise granulométrica e testes de resistência mecânica. Mesmo com aproximadamente 25% de ferro, os geopolímeros apresentaram comportamento mecânico compatível com funções atribuídas e similares a normativa estabelecida para o cimento Portland, com resistência máxima de 25,85 MPa.

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Influence of nano-TiO2, nano-Fe2O3, nanoclay and nano-CaCO3 on the properties of cement/geopolymer concrete

Cited by 63 publications

References 88 publications

Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Synthesis Methods and Applications of TiO2 based Nanomaterials

Estudo do desempenho mecânico de geopolímero produzido com auto teor de ferro

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