Pozzolanic activity of mechanochemically and thermally activated kaolins in cement

Souri, Alireza; Kazemi-Kamyab, Hadi; Snellings, Ruben; Naghizadeh, R.; Golestani‐Fard, F.; Scrivener, Karen

doi:10.1016/j.cemconres.2015.04.017

Cited by 128 publications

(57 citation statements)

References 48 publications

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“…Diluted suspension can hinder the movement of the balls and thus decrease the impact forces transmitted to the processed material. On the other hand, an insufficient amount of water can enable to (Souri et al 2015). Reprinted from Cement and Concrete Research, 77, Souri, A., Kazemi-Kamyab, H., Snellings, R., Naghizadeh, R., Golestani-Fard, F., Scrivener, K., Pozzolanic activity of mechanochemically and thermally activated kaolins in cement, Pages 47-59, Copyright (2018), with permission from Elsevier obtain increased viscosity of the system during grinding.…”

Section: Process Parametersmentioning

confidence: 99%

“…However, high carbon dioxide emitting thermal activation method through calcination of kaolin is by far the main way to obtain metakaolin characterized Garcia et al (1991) 16 and 18 Kaolin Sugiyama et al (1993) 15 Pyrophyllite and talc Kristóf et al (1993) 7 Kaolin Sugiyama et al (1994) 16 Pyrophyllite and Kaolin by a sufficient pozzolanic activity. An alternative solution is to use MCA, (Vizcayno et al 2010;Zdujić 2012, 2014;Souri et al 2015;Balczár et al 2016;Ilić et al 2016). Souri et al (2015) observed that both treatments, thermal and mechanochemical, led to the formation of pozzolanic materials, but are characterized by different physico-chemical properties.…”

Section: Applications Of Mechanochemical Activationmentioning

confidence: 99%

“…An alternative solution is to use MCA, (Vizcayno et al 2010;Zdujić 2012, 2014;Souri et al 2015;Balczár et al 2016;Ilić et al 2016). Souri et al (2015) observed that both treatments, thermal and mechanochemical, led to the formation of pozzolanic materials, but are characterized by different physico-chemical properties. Results showed that the increased specific surface area of the mechanochemically processed kaolin enhanced the early age hydration speed and the strength development of blended cements, (Souri et al 2015).…”

Section: Applications Of Mechanochemical Activationmentioning

confidence: 99%

“…It has good pozzolanic activity, can increase the concrete strength and improve the durability. Furthermore, the MCA showed to enhance pozzolanic activity of the natural kaolinitic clays, (Ambroise et al 1994;Sabir et al 2001;Vizcayno et al 2010;Souri et al 2015).…”

Section: Introductionmentioning

confidence: 97%

“…The clay itself, which is the main scope of this review, is a commonly occurring and sustainable natural mineral used in several applications. For example, calcined kaolinitic clays are widely used to manufacture pozzolanic cement, (Ambroise et al 1994;Sabir et al 2001;Vizcayno et al 2010;Souri et al 2015;Sandström 2016). Metakaolin, which is produced by thermal calcination of kaolinitic clays, is used as a supplementary cementitious material in the production of concrete.…”

Section: Introductionmentioning

confidence: 99%

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Mechanochemical activation of natural clay minerals: an alternative to produce sustainable cementitious binders – review

2019

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Mechanochemical activation can be defined as a process able to induce structural disorder through intensive grinding. In certain conditions, it may increase the chemical reactivity of the processed material. The process is extensively utilized in extractive metallurgy, synthesis of nanocomposites or pharmacology. It is also considered an environmentally friendly alternative to activate kaolinitic clay avoiding high calcination temperature. This paper aims to give a comprehensive overview of the process, its evolution, process parameters and applications. The paper focuses on the mechanochemical treatment of natural clay minerals, aiming at their transformation into cementitious or pozzolanic materials. It provides a summarized review of the theories related to the mechanochemistry and discusses commonly used models. The paper also analyzes various key factors and parameters controlling the mechanochemical activation process. The optimization and control of the several factors, as the filling ratio, the grinding media, the velocity, the time of grinding, etc., can promote developments and new research opportunities on different fields of application. Examples of applications, with a special focus on mechanochemically activated clay minerals and their use as cementitious binders, are listed as well.

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Section: Process Parametersmentioning

confidence: 99%

Section: Applications Of Mechanochemical Activationmentioning

confidence: 99%

Section: Applications Of Mechanochemical Activationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mechanochemical activation of natural clay minerals: an alternative to produce sustainable cementitious binders – review

2019

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Polymers and Additives in Extreme Environments

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Optimization of Ca/Si ratio in schists to enhance the pozzolanic supplementary cementitious material for OPC blending

Mokhtari,

Hassannezhad,

Bundur

et al. 2024

Int J Ceramic Engine & Sci

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Supplementary cementitious materials (SCMs) are partial substitutes for ordinary Portland cement (OPC) to reduce cost, the production of carbon dioxide (CO2), and fossil fuel consumption. Recent studies illustrated the effectiveness of calcined kaolinite clay as a proper partial replacement for OPC. Hence, schist‐type materials containing sufficient clay contents are regarded as promising candidates for OPC replacement. This study focuses on the possible use of activated calcium carbonates (CaCO3) to augment pozzolanic reactions of schists as a substitute for OPC. The use of activated calcium carbonates proved to be successful in expediting pozzolanic reactions and facilitating the formation of additional calcium aluminosilicate hydrate (C‐A‐S‐H). In this study, the optimal strength performance for blended cement was achieved by adjusting the total carbonate content to 30 wt.% of the schist. The decision to introduce carbonate to the schist was guided by calculations determining the need for an excess of calcium ions to fully harness the potential for C‐A‐S‐H formation. Virgin and augmented schists were activated by up to 80% of their respective potentials by heat treatment. Phase content and decomposition behavior of the active components were investigated by thermogravimetric analysis (TGA), x‐ray diffraction (XRD), and scanning electron microscopy (SEM). Cement paste samples incorporating 30 wt.% replacement of OPC with activated schist SCMs were prepared. The phase distribution and compressive strengths of these samples were assessed at hydration intervals of 2, 7, 28, 50, and 90 days. Cement formulations with activated calcium‐augmented SCMs exhibited compressive strength values at 109%, 101%, 96%, 95%, and 94% compared to pure cement paste at 2, 7, 28, 50, and 90 days, respectively. These values surpassed 90% of the compressive strength of pure OPC at equivalent hydration time points.

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Pozzolanic activity of mechanochemically and thermally activated kaolins in cement

Cited by 128 publications

References 48 publications

Mechanochemical activation of natural clay minerals: an alternative to produce sustainable cementitious binders – review

Mechanochemical activation of natural clay minerals: an alternative to produce sustainable cementitious binders – review

Other Environments

Optimization of Ca/Si ratio in schists to enhance the pozzolanic supplementary cementitious material for OPC blending

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