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Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures
The properties of blended cement containing 0%, 20%, and 50% iron tailing powder (ITP) at 20 °C and 60 °C were investigated by determining the hydration heat, microstructure, and compressive strength. The addition of ITP decreases the exothermic rate and cumulative hydration heat of blended cement a...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779138/ https://www.ncbi.nlm.nih.gov/pubmed/35057410 http://dx.doi.org/10.3390/ma15020693 |
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author | Wang, Heng Han, Fanghui Pu, Shaochang Zhang, Hongbo |
author_facet | Wang, Heng Han, Fanghui Pu, Shaochang Zhang, Hongbo |
author_sort | Wang, Heng |
collection | PubMed |
description | The properties of blended cement containing 0%, 20%, and 50% iron tailing powder (ITP) at 20 °C and 60 °C were investigated by determining the hydration heat, microstructure, and compressive strength. The addition of ITP decreases the exothermic rate and cumulative hydration heat of blended cement at 20 °C. The high temperature increases the hydration rate and leads to the hydration heat of blended cement containing 20% ITP higher than that of Portland cement. Increasing the amount of ITP decreases the non-evaporable water content and Ca(OH)(2) content as well as compressive strength at both of the two studied temperatures. The addition of ITP coarsens the early-age pore structure but improves the later-age pore structure at 20 °C. The high temperature significantly improves the early-age properties of blended cement containing ITP, but it is detrimental to the later-age properties development. The reaction of ITP is limited even at high temperature. The large ITP particles bond poorly with surrounding hydration products under early high-temperature curing condition. The properties of blended cement containing a large amount of ITP are much poorer at high temperature. |
format | Online Article Text |
id | pubmed-8779138 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-87791382022-01-22 Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures Wang, Heng Han, Fanghui Pu, Shaochang Zhang, Hongbo Materials (Basel) Article The properties of blended cement containing 0%, 20%, and 50% iron tailing powder (ITP) at 20 °C and 60 °C were investigated by determining the hydration heat, microstructure, and compressive strength. The addition of ITP decreases the exothermic rate and cumulative hydration heat of blended cement at 20 °C. The high temperature increases the hydration rate and leads to the hydration heat of blended cement containing 20% ITP higher than that of Portland cement. Increasing the amount of ITP decreases the non-evaporable water content and Ca(OH)(2) content as well as compressive strength at both of the two studied temperatures. The addition of ITP coarsens the early-age pore structure but improves the later-age pore structure at 20 °C. The high temperature significantly improves the early-age properties of blended cement containing ITP, but it is detrimental to the later-age properties development. The reaction of ITP is limited even at high temperature. The large ITP particles bond poorly with surrounding hydration products under early high-temperature curing condition. The properties of blended cement containing a large amount of ITP are much poorer at high temperature. MDPI 2022-01-17 /pmc/articles/PMC8779138/ /pubmed/35057410 http://dx.doi.org/10.3390/ma15020693 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Heng Han, Fanghui Pu, Shaochang Zhang, Hongbo Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures |
title | Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures |
title_full | Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures |
title_fullStr | Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures |
title_full_unstemmed | Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures |
title_short | Properties of Blended Cement Containing Iron Tailing Powder at Different Curing Temperatures |
title_sort | properties of blended cement containing iron tailing powder at different curing temperatures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8779138/ https://www.ncbi.nlm.nih.gov/pubmed/35057410 http://dx.doi.org/10.3390/ma15020693 |
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