The impact of mechanochemical activation on the physicochemical properties and pozzolanic reactivity of kaolinite, muscovite and montmorillonite

Vahiddin Baki; Xinyuan Ke; Andrew Heath; Juliana Calabria-Holley

doi:10.1016/j.cemconres.2022.106962

The impact of mechanochemical activation on the physicochemical properties and pozzolanic reactivity of kaolinite, muscovite and montmorillonite

Vahiddin Baki, Xinyuan Ke, Andrew Heath, Juliana Calabria-Holley

Research output: Contribution to journal › Article › peer-review

51 Citations (SciVal)

Abstract

Partially replacing cement clinkers with activated clays is one of the most promising routes to decarbonise the cement industry and tackle the climate change crisis. This study systematically investigated the impact of mechanochemical activation on the physicochemical properties of kaolinite, muscovite and montmorillonite clays, including particle size distributions, morphologies, bulk and surface chemical structures. The results suggest that mechanochemical activation treatment is particularly efficient for improving the pozzolanic activity of 2:1 clays (i.e. muscovite and montmorillonite), which are difficult to effectively activate through thermal treatments and therefore not previously been extensively used as supplementary cementitious materials (SCMs). In addition to dehydroxylation and amorphisation, mechanochemical milling also leads to surface aluminium enrichment and reduction in binding energies of both Si and Al elements, all contributing to the enhanced pozzolanic reactivity. The outcome from this study represents a step-change in scientific knowledge and extends frontiers of developing new SCMs from sustainable resources.

Original language	English
Article number	106962
Journal	Cement and Concrete Research
Volume	162
Early online date	12 Sept 2022
DOIs	https://doi.org/10.1016/j.cemconres.2022.106962
Publication status	Published - 31 Dec 2022

Bibliographical note

Funding Information:
V. A. Baki acknowledges the Turkish Ministry of National Education for sponsoring his PhD study. The participation of X. Ke is partially sponsored by her University of Bath Prize Fellowship (2018–2021). The authors would like to thank Prof. Dr. Fatih Yilmaz for his help with accessing the TGA and FTIR facilities at Recep Tayyip Erdogan University, Kale Seramik and its employees, Dr. Yildiz Yildirim, Dr. Hasan Sari and Mr. Sertan Karnap for assisting the collection of raw materials. The authors also thank the University of Bath Architecture and Civil Engineering Department technician team for their valuable help during the preparation of experiments.

Keywords

2:1 Clays
Blended cement (D)
Characterisation (B)
Surface aluminium enrichment
Thermal treatment (A)

ASJC Scopus subject areas

Building and Construction
General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.cemconres.2022.106962Licence: CC BY

Cite this

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title = "The impact of mechanochemical activation on the physicochemical properties and pozzolanic reactivity of kaolinite, muscovite and montmorillonite",

abstract = "Partially replacing cement clinkers with activated clays is one of the most promising routes to decarbonise the cement industry and tackle the climate change crisis. This study systematically investigated the impact of mechanochemical activation on the physicochemical properties of kaolinite, muscovite and montmorillonite clays, including particle size distributions, morphologies, bulk and surface chemical structures. The results suggest that mechanochemical activation treatment is particularly efficient for improving the pozzolanic activity of 2:1 clays (i.e. muscovite and montmorillonite), which are difficult to effectively activate through thermal treatments and therefore not previously been extensively used as supplementary cementitious materials (SCMs). In addition to dehydroxylation and amorphisation, mechanochemical milling also leads to surface aluminium enrichment and reduction in binding energies of both Si and Al elements, all contributing to the enhanced pozzolanic reactivity. The outcome from this study represents a step-change in scientific knowledge and extends frontiers of developing new SCMs from sustainable resources.",

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AU - Calabria-Holley, Juliana

N1 - Funding Information: V. A. Baki acknowledges the Turkish Ministry of National Education for sponsoring his PhD study. The participation of X. Ke is partially sponsored by her University of Bath Prize Fellowship (2018–2021). The authors would like to thank Prof. Dr. Fatih Yilmaz for his help with accessing the TGA and FTIR facilities at Recep Tayyip Erdogan University, Kale Seramik and its employees, Dr. Yildiz Yildirim, Dr. Hasan Sari and Mr. Sertan Karnap for assisting the collection of raw materials. The authors also thank the University of Bath Architecture and Civil Engineering Department technician team for their valuable help during the preparation of experiments.

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N2 - Partially replacing cement clinkers with activated clays is one of the most promising routes to decarbonise the cement industry and tackle the climate change crisis. This study systematically investigated the impact of mechanochemical activation on the physicochemical properties of kaolinite, muscovite and montmorillonite clays, including particle size distributions, morphologies, bulk and surface chemical structures. The results suggest that mechanochemical activation treatment is particularly efficient for improving the pozzolanic activity of 2:1 clays (i.e. muscovite and montmorillonite), which are difficult to effectively activate through thermal treatments and therefore not previously been extensively used as supplementary cementitious materials (SCMs). In addition to dehydroxylation and amorphisation, mechanochemical milling also leads to surface aluminium enrichment and reduction in binding energies of both Si and Al elements, all contributing to the enhanced pozzolanic reactivity. The outcome from this study represents a step-change in scientific knowledge and extends frontiers of developing new SCMs from sustainable resources.

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The impact of mechanochemical activation on the physicochemical properties and pozzolanic reactivity of kaolinite, muscovite and montmorillonite

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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Autosorb iQ Sorption

FLIR T620 Thermal Imaging Cameras

Mastersizer

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The impact of mechanochemical activation on the physicochemical properties and pozzolanic reactivity of kaolinite, muscovite and montmorillonite

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

Other files and links

Fingerprint

Equipment

Autosorb iQ Sorption

FLIR T620 Thermal Imaging Cameras

Mastersizer

Cite this