Colour control in fly ash as a combined function of particle size and chemical composition

Zaeni, Akhmad; Bandyopadhyay, Sri; Yu, Aibing; Rider, J.R.; Sorrell, Charles C.; Dain, Stephen J.; Blackburn, Daryl; White, Chris

doi:10.1016/j.fuel.2009.07.006

Cited by 18 publications

(8 citation statements)

References 10 publications

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“…The elemental analysis is shown in Table 1 by ICP-AES method (inductively coupled plasma-atomic emission spectrometry (Zaeni et al, 2010).…”

Section: Fly Ashmentioning

confidence: 99%

“…Samples were cut to dimensions of 10 mm × 10 mm × 5 mm, and were cleaned in propanol and Decon detergent before analysis. The Table 1 Constituents and their percentage in the Tarong fly ash (Zaeni et al, 2010) surfaces of the samples were flat enough for the ion beam to hit the sample surface at specific angle and reflect it in a specific angle. The tested surface was given gold coating 30 μm thick, and then the gold coating was removed to a thinner layer.…”

Section: Materials Characterizationmentioning

confidence: 99%

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Use of Secondary Ion Mass Spectrometry (SIMS) to identify fly ash mineral spatial and particulate distribution in epoxy polymer

Ibraheem

Devasahayam

Standard

et al. 2015

International Journal of Mineral Processing

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“…The elemental analysis is shown in Table 1 by ICP-AES method (inductively coupled plasma-atomic emission spectrometry (Zaeni et al, 2010).…”

Section: Fly Ashmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

Use of Secondary Ion Mass Spectrometry (SIMS) to identify fly ash mineral spatial and particulate distribution in epoxy polymer

Ibraheem

Devasahayam

Standard

et al. 2015

International Journal of Mineral Processing

Self Cite

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“…Fly ash from Tarong power plant, Queensland, Australia was selected for this research. Although different types of fly ash are available in Queensland, all of them have low content of CaO ranging from 0 to 0.4% (Zaeni et al 2010). This indicates that the relatively low buffer capacity of these fly ashes needs to be enhanced by addition of lime.…”

Section: Materials Propertiesmentioning

confidence: 99%

Feasibility of using fly ash, lime, and bentonite to neutralize acidity of pore fluids

2013

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Acidic groundwater resulting from the poorly planned use of acid sulfate soils has become a major environmental issue in coastal Australia over the last several years. Use of permeable reactive barriers (PRBs) designed to generate alkalinity by promoting sulfate reduction has recently become popular as an alternative solution to this problem. However, recent studies have also revealed that the long-term performance of such PRBs can be significantly undermined by chemical precipitation and clogging of pore space, which would decrease the buffer capacity and hydraulic conductivity of the reactive material. This study seeks to explore the feasibility of using bentonite in addition to lime and fly ash to form mixtures with a high buffer capacity and permeability that would enable groundwater flow through PRBs over a substantial period of time. A series of laboratory experiments, including buffer capacity and leaching tests, were performed on different mixtures of fly ash with lime and bentonite using acidic fluids of low pH. It was found that the ability of such mixtures to neutralize acidic fluids was mostly controlled by the content of lime. Laboratory data also showed that an addition of bentonite to limefly ash mixtures could decrease the buffer 2 capacity of soil. Compaction tests indicated that the presence of bentonite would increase the dry density of mixtures at the optimum moisture content. A series of hydraulic conductivity tests were carried out to study changes in the coefficient of permeability of lime -fly ash mixtures with different contents of bentonite permeated with acidic liquids. The obtained results revealed that the coefficient of permeability of the specimens tended to increase over a period of time, likely due to the changes in the diffuse double layer of bentonite particles.

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“…Among the mineral additions that have been used in combination with WPC are limestone (Colak, 2008), metakaolin (Love et al, 2007;Siddique and Klaus, 2009;Talero, 2005), fly ash (Girão et al, 2010), rice husk ash (Ferraro and Nanni, 2012) and blast furnace slag (Dellinghausen et al, 2012). Limestone does not have pozzolanic activity (Colak, 2008); metakaolin usually presents yellow or pink tones that go against the aesthetic quality of the final product (Siddique and Klaus, 2009); fly ash is usually dark in colour, depending on its chemical composition (Zaeni et al, 2010); and rice husk ash could contain carbon particles, which modifies the colour of the cement. Nanosilica, which is most commonly produced by way of sol-gel techniques from silicate solutions or silane reagents (Jal et al, 2004), is white when it is in the agglomerated state.…”

Section: Introductionmentioning

confidence: 99%

Performance of white Portland cement matrixes blended with nanosilica and limestone for architectural applications

Tobón

Reales

Bernabeu

2016

Advances in Cement Research

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This research evaluates the combination of nanosilica particles and ground limestone as mineral additions for white Portland cement (WPC) matrixes, envisioning architectural applications where the whiteness of the final product is a key feature. The WPC pastes and mortars were fabricated with additions of nanosilica and substitutions of cement by limestone. An experimental campaign was carried out to study the effect of the combination of nanoparticles and mineral additions over the hydration process, whiteness and mechanical performance of the WPC matrices. It was found that nanosilica in combination with limestone is an excellent option as a mineral addition for WPC, since it can improve its properties in the fresh and hardened states without altering the colour of the final product.

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Colour control in fly ash as a combined function of particle size and chemical composition

Cited by 18 publications

References 10 publications

Use of Secondary Ion Mass Spectrometry (SIMS) to identify fly ash mineral spatial and particulate distribution in epoxy polymer

Use of Secondary Ion Mass Spectrometry (SIMS) to identify fly ash mineral spatial and particulate distribution in epoxy polymer

Feasibility of using fly ash, lime, and bentonite to neutralize acidity of pore fluids

Performance of white Portland cement matrixes blended with nanosilica and limestone for architectural applications

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