The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste

Fly ashes from coal combustion in circulating fluidized bed boilers in three power plants were tested as a potential additive to cement binder in concrete. The phase composition and microstructure of cement pastes containing fluidized bed fly ash was studied. The fractions of cement substitution wit...

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Autores principales: Glinicki, Michał A., Jóźwiak-Niedźwiedzka, Daria, Dąbrowski, Mariusz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6747977/
https://www.ncbi.nlm.nih.gov/pubmed/31484395
http://dx.doi.org/10.3390/ma12172838
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author Glinicki, Michał A.
Jóźwiak-Niedźwiedzka, Daria
Dąbrowski, Mariusz
author_facet Glinicki, Michał A.
Jóźwiak-Niedźwiedzka, Daria
Dąbrowski, Mariusz
author_sort Glinicki, Michał A.
collection PubMed
description Fly ashes from coal combustion in circulating fluidized bed boilers in three power plants were tested as a potential additive to cement binder in concrete. The phase composition and microstructure of cement pastes containing fluidized bed fly ash was studied. The fractions of cement substitution with fluidized bed fly ash were 20% and 30% by weight. X-ray diffraction (XRD) tests and thermal analyses (derivative thermogravimetry (DTG), differential thermal analysis (DTA) and thermogravimetry (TG)) were performed on ash specimens and on hardened cement paste specimens matured in water for up to 400 days. Quantitative evaluation of the phase composition as a function of fluidized bed fly ash content revealed significant changes in portlandite content and only moderate changes in the content of ettringite.
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spelling pubmed-67479772019-09-27 The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste Glinicki, Michał A. Jóźwiak-Niedźwiedzka, Daria Dąbrowski, Mariusz Materials (Basel) Article Fly ashes from coal combustion in circulating fluidized bed boilers in three power plants were tested as a potential additive to cement binder in concrete. The phase composition and microstructure of cement pastes containing fluidized bed fly ash was studied. The fractions of cement substitution with fluidized bed fly ash were 20% and 30% by weight. X-ray diffraction (XRD) tests and thermal analyses (derivative thermogravimetry (DTG), differential thermal analysis (DTA) and thermogravimetry (TG)) were performed on ash specimens and on hardened cement paste specimens matured in water for up to 400 days. Quantitative evaluation of the phase composition as a function of fluidized bed fly ash content revealed significant changes in portlandite content and only moderate changes in the content of ettringite. MDPI 2019-09-03 /pmc/articles/PMC6747977/ /pubmed/31484395 http://dx.doi.org/10.3390/ma12172838 Text en © 2019 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
Glinicki, Michał A.
Jóźwiak-Niedźwiedzka, Daria
Dąbrowski, Mariusz
The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste
title The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste
title_full The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste
title_fullStr The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste
title_full_unstemmed The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste
title_short The Influence of Fluidized Bed Combustion Fly Ash on the Phase Composition and Microstructure of Cement Paste
title_sort influence of fluidized bed combustion fly ash on the phase composition and microstructure of cement paste
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6747977/
https://www.ncbi.nlm.nih.gov/pubmed/31484395
http://dx.doi.org/10.3390/ma12172838
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