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School of Science, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK
Interests: silicate materials; biomaterials; cements; glasses
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Dr. Andrew Paul Hurt

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School of Science, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK
Interests: biomaterials; materials chemistry; X-ray diffraction analysis; electron microscopy; surface analysis

Special Issue Information

Dear Colleagues,

The longstanding significance of calcium silicate materials in the built environment cannot be overstated. In addition, a wide range of calcium silicate-based glasses, ceramics, and cements has found increasing application in biomaterials for the restoration of dental and skeletal tissues. Accordingly, this Special Issue seeks to celebrate recent advances in any aspect of the synthesis, characterization, properties and applications of calcium silicate materials.

Suitable topics for original research articles, critical reviews and short communications include, but are not limited to: cements and concretes; ceramics; glasses; zeolites; clays; geopolymers; biomaterials; cosmetics; refractory, insulation and heat-resistant materials; construction and demolition; soil conditioning; reuse, recycling and conservation of natural and industrial calcium silicates; and any aspect of the preparation, analysis, and uses of calcium silicates.

Dr. Nichola Coleman
Dr. Andrew Paul Hurt
Guest Editors

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Keywords

calcium silicates
cements
concretes
ceramics
glasses
geopolymers
zeolites
clays
biomaterials
sorbents
ion-exchangers

Published Papers (1 paper)

Research

Open AccessArticle

Multicriteria Assessment for Calculating the Optimal Content of Calcium-Rich Fly Ash in Metakaolin-Based Geopolymers

Artem Sharko

Petr Louda

Van Vu Nguyen

Katarzyna Ewa Buczkowska

and

Ceramics 2023, 6(1), 525-537; https://doi.org/10.3390/ceramics6010031 - 14 Feb 2023

Viewed by 520

Abstract

This study examines the impact of calcium-rich fly ash as an additive on metakaolin-based geopolymers. Six types of fly ash (FA1-FA7) from different thermal power plants in the Czech Republic were collected and characterized based on their physical and chemical properties. The addition of fly ash into the geopolymers was evaluated through a multicriteria assessment that focused on density and mechanical properties. By using a multi-criteria approach, the assessment provides a comprehensive and holistic evaluation of the material, allowing for a more informed decision about the optimal addition of additives. This approach helps to minimize any negative impact on the material’s properties while maximizing the utilization of the by-product. The result is an optimized geopolymer mixture with improved properties and increased sustainability, as the by-product is used beneficially. Furthermore, calcium content is the key factor that affects the physical properties of geopolymers by accelerating the curing time. This rapid process can result in reduced strength with increasing fly ash content. The multicriteria assessment revealed that the optimal condition is achieved using fly ash (FA2) from the Loucovice thermal power plant (5.2 wt.% Ca) that was treated at a temperature of 615 °C. The flexural strength of FA2-based geopolymers increased by 13% compared to concrete (standard). However, the addition of fly ash significantly reduced the compressive strength of geopolymers throughout the range of specimens. The Charpy impact strength of FA2 was higher than the standard due to the presence of unburned biomass solids in the ash structure that can absorb energy easily. Full article

(This article belongs to the Special Issue The Synthesis, Characterization, and Applications of Calcium Silicate Materials)

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