Particle size manipulation as an influential parameter in the development of mechanical properties in electric arc furnace slag-based AAM

Traven, Katja; Češnovar, Mark; Ducman, Vilma

doi:10.1016/j.ceramint.2019.07.296

Cited by 33 publications

(19 citation statements)

References 42 publications

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“…It was observed that the paste consisting of finer particles requires much shorter setting time compared to the paste consisting of coarser particles. This is due to the fact that the finer particles have larger specific surface area and react faster with the activating solution [68]. Figure 10 shows the compressive strength of the AAMs produced as a function of particle size and curing temperature (60 or 80 • C).…”

Section: Effect Of Slag Particle Size and Curing Temperaturementioning

confidence: 99%

Grinding Kinetics of Slag and Effect of Final Particle Size on the Compressive Strength of Alkali Activated Materials

et al. 2019

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This study aims to model grinding of a Polish ferronickel slag and evaluate the particle size distributions (PSDs) of the products obtained after different grinding times. Then, selected products were alkali activated in order to investigate the effect of particle size on the compressive strength of the produced alkali activated materials (AAMs). Other parameters affecting alkali activation, i.e., temperature, curing, and ageing time were also examined. Among the different mathematical models used to simulate the particle size distribution, Rosin-Rammler (RR) was found to be the most suitable. When piecewise regression analysis was applied to experimental data it was found that the particle size distribution of the slag products exhibits multifractal character. In addition, grinding of slag exhibits non-first-order behavior and the reduction rate of each size is time dependent. The grinding rate and consequently the grinding efficiency increases when the particle size increases, but drops sharply near zero after prolonged grinding periods. Regarding alkali activation, it is deduced that among the parameters studied, particle size (and the respective specific surface area) of the raw slag product and curing temperature have the most noticeable impact on the compressive strength of the produced AAMs.

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Section: Effect Of Slag Particle Size and Curing Temperaturementioning

confidence: 99%

Grinding Kinetics of Slag and Effect of Final Particle Size on the Compressive Strength of Alkali Activated Materials

et al. 2019

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“…In earlier studies, we showed the beneficial effect of grinding the raw materials, even if the process is energy-intensive; the reduction of particle size and the increase of specific surface area were crucial to obtaining the higher reaction rate of the precursor, more reacted final material and the proper mechanical properties of the geopolymer products [80]. The size reduction throughout the milling process is recognized as a mechanical activation of the material, resulting in an increase in compressive strength [75,79]. Another way is separating in different fractions to enable smaller particles [81].…”

Section: Resultsmentioning

confidence: 98%

“…The smaller particles have a larger surface area in comparison to the volume and, thus, higher reactivity, including the rate of dissolution of the monomers, i.e., silicate and aluminate, consequently showing a more effective geopolymerization process [75][76][77][78]. Furthermore, the porosity is the lowest at the smallest particle size and the voids can be better filled within fine particles, leading to denser and stronger geopolymer products [79].…”

Section: Resultsmentioning

confidence: 99%

Hybrid Materials Based on Fly Ash, Metakaolin, and Cement for 3D Printing

et al. 2021

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Nowadays, one very dynamic development of 3D printing technology is required in the construction industry. However, the full implementation of this technology requires the optimization of the entire process, starting from the design of printing ideas, and ending with the development and implementation of new materials. The article presents, for the first time, the development of hybrid materials based on a geopolymer or ordinary Portland cement matrix that can be used for various 3D concrete-printing methods. Raw materials used in the research were defined by particle size distribution, specific surface area, morphology by scanning electron microscopy, X-ray diffraction, thermal analysis, radioactivity tests, X-ray fluorescence, Fourier transform infrared spectroscopy and leaching. The geopolymers, concrete, and hybrid samples were described according to compressive strength, flexural strength, and abrasion resistance. The study also evaluates the influence of the liquid-to-solid ratio on the properties of geopolymers, based on fly ash (FA) and metakaolin (MK). Printing tests of the analyzed mixtures were also carried out and their suitability for various applications related to 3D printing technology was assessed. Geopolymers and hybrids based on a geopolymer matrix with the addition of 5% cement resulted in the final materials behaving similarly to a non-Newtonian fluid. Without additional treatments, this type of material can be successfully used to fill the molds. The hybrid materials based on cement with a 5% addition of geopolymer, based on both FA and MK, enabled precise detail printing.

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“…It was observed that the paste consisting of finer particles requires much shorter setting time compared to the paste consisting of coarser particles. This is due to the fact that the finer particles have larger specific surface area and react faster with the activating solution [67]. Figure 10 shows the compressive strength of the AAMs produced as a function of particle size and curing temperature (60 ⁰C or 80 ⁰C).…”

Section: Fractal Features Of Products Psdmentioning

confidence: 99%

Grinding Kinetics of Slag and Effect of Final Particle Size on the Compressive Strength of Alkali Activated Materials

Petrakis¹,

Karmali²,

Bartzas³

et al. 2019

Preprint

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This study aims to model grinding of a Polish slag and evaluate the particle size distributions of the products obtained after different grinding times. Then, selected products were alkali activated in order to investigate the effect of particle size on the compressive strength of the produced alkali activated materials (AAMs). Other parameters affecting alkali activation, i.e. temperature, curing and ageing time were also examined. Among the different mathematical models used to simulate the particle size distribution, Rosin-Rammler (RR) was found to be the most suitable. When piecewise regression analysis was applied to experimental data it was found that the particle size distribution of the slag products exhibits multi fractal character. In addition, grinding of slag exhibits non-first-order behavior and the reduction rate of each size is time dependent. The grinding rate and consequently the grinding efficiency increases when the particle size increases, but drops sharply near zero after prolonged grinding periods. Regarding alkali activation, it is deduced that among the parameters studied, particle size (and the respective specific surface area) of the raw slag product and curing temperature have the most noticeable impact on the compressive strength of the produced AAMs.

show abstract

Particle size manipulation as an influential parameter in the development of mechanical properties in electric arc furnace slag-based AAM

Cited by 33 publications

References 42 publications

Grinding Kinetics of Slag and Effect of Final Particle Size on the Compressive Strength of Alkali Activated Materials

Grinding Kinetics of Slag and Effect of Final Particle Size on the Compressive Strength of Alkali Activated Materials

Hybrid Materials Based on Fly Ash, Metakaolin, and Cement for 3D Printing

Grinding Kinetics of Slag and Effect of Final Particle Size on the Compressive Strength of Alkali Activated Materials

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