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Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate

Tricalcium silicate phase is one of the main components of modern Portland cements. One of the major industrial challenges in the field of cement production is mapping the influence of individual clinker minerals and their polymorphs on the properties of industrially produced clinkers. The primary g...

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Autores principales: Ravaszová, Simona, Dvořák, Karel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7504084/
https://www.ncbi.nlm.nih.gov/pubmed/32847001
http://dx.doi.org/10.3390/ma13173734
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author Ravaszová, Simona
Dvořák, Karel
author_facet Ravaszová, Simona
Dvořák, Karel
author_sort Ravaszová, Simona
collection PubMed
description Tricalcium silicate phase is one of the main components of modern Portland cements. One of the major industrial challenges in the field of cement production is mapping the influence of individual clinker minerals and their polymorphs on the properties of industrially produced clinkers. The primary goal of this work is to improve the fundamental knowledge of understanding the process of alite formation and development from a crystallographic point of view. This study focuses on the observation of the crystallization process of triclinic alite during the firing process, which to date has not been thoroughly described. The effects of a wide range of temperatures and sintering periods on crystallinity were assessed on samples fired in platinum crucibles in a laboratory furnace. X-ray analysis—together with calculation of crystallinity using Scherrer’s equation—was used for observing the crystallite size changes of T1 alite polymorph. According to the acquired results, among the most technologically and economically advantageous regimes of production of a high-quality triclinic alite is the temperature of 1450 °C and sintering time of two hours. The most significant changes in the crystallite size occurred within the first hour of sintering for the whole investigated temperature range.
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spelling pubmed-75040842020-09-24 Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate Ravaszová, Simona Dvořák, Karel Materials (Basel) Article Tricalcium silicate phase is one of the main components of modern Portland cements. One of the major industrial challenges in the field of cement production is mapping the influence of individual clinker minerals and their polymorphs on the properties of industrially produced clinkers. The primary goal of this work is to improve the fundamental knowledge of understanding the process of alite formation and development from a crystallographic point of view. This study focuses on the observation of the crystallization process of triclinic alite during the firing process, which to date has not been thoroughly described. The effects of a wide range of temperatures and sintering periods on crystallinity were assessed on samples fired in platinum crucibles in a laboratory furnace. X-ray analysis—together with calculation of crystallinity using Scherrer’s equation—was used for observing the crystallite size changes of T1 alite polymorph. According to the acquired results, among the most technologically and economically advantageous regimes of production of a high-quality triclinic alite is the temperature of 1450 °C and sintering time of two hours. The most significant changes in the crystallite size occurred within the first hour of sintering for the whole investigated temperature range. MDPI 2020-08-24 /pmc/articles/PMC7504084/ /pubmed/32847001 http://dx.doi.org/10.3390/ma13173734 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ravaszová, Simona
Dvořák, Karel
Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate
title Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate
title_full Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate
title_fullStr Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate
title_full_unstemmed Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate
title_short Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate
title_sort development of crystallinity of triclinic polymorph of tricalcium silicate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7504084/
https://www.ncbi.nlm.nih.gov/pubmed/32847001
http://dx.doi.org/10.3390/ma13173734
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