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Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste
The grinding process has become widely used to improve the fineness and performance of fly ash. However, most studies focus on the particle size distribution of ground fly ash, while the particle morphology is also an important factor to affect the performance of cement paste. This article aims at t...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7826750/ https://www.ncbi.nlm.nih.gov/pubmed/33430518 http://dx.doi.org/10.3390/ma14020283 |
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author | Ma, Juntao Wang, Daguang Zhao, Shunbo Duan, Ping Yang, Shangtong |
author_facet | Ma, Juntao Wang, Daguang Zhao, Shunbo Duan, Ping Yang, Shangtong |
author_sort | Ma, Juntao |
collection | PubMed |
description | The grinding process has become widely used to improve the fineness and performance of fly ash. However, most studies focus on the particle size distribution of ground fly ash, while the particle morphology is also an important factor to affect the performance of cement paste. This article aims at three different kinds of ground fly ash from the ball mill and vertical mill, and the particle morphology is observed by scanning electron microscopy (SEM) to calculate the spherical destruction (the ratio of spherical particles broken into irregular particles in the grinding process of fly ash), which provides a quantification of the morphology change in the grinding process. The fluidity of cement paste and the strength of cement mortar are tested to study the relation of spherical destruction and fluidity and strength. The results show that the spherical destruction of ground fly ash in a ball mill is more than 80% and that in a vertical mill with a separation system is only 11.9%. Spherical destruction shows a significant relation with the fluidity. To different addition of ground fly ash, the fluidity of cement paste decreases with the increase of spherical destruction. To the strength of cement paste, particle size distribution and spherical destruction are both the key factors. Therefore, spherical destruction is an important measurement index to evaluate the grinding effect of the fly ash mill. |
format | Online Article Text |
id | pubmed-7826750 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-78267502021-01-25 Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste Ma, Juntao Wang, Daguang Zhao, Shunbo Duan, Ping Yang, Shangtong Materials (Basel) Article The grinding process has become widely used to improve the fineness and performance of fly ash. However, most studies focus on the particle size distribution of ground fly ash, while the particle morphology is also an important factor to affect the performance of cement paste. This article aims at three different kinds of ground fly ash from the ball mill and vertical mill, and the particle morphology is observed by scanning electron microscopy (SEM) to calculate the spherical destruction (the ratio of spherical particles broken into irregular particles in the grinding process of fly ash), which provides a quantification of the morphology change in the grinding process. The fluidity of cement paste and the strength of cement mortar are tested to study the relation of spherical destruction and fluidity and strength. The results show that the spherical destruction of ground fly ash in a ball mill is more than 80% and that in a vertical mill with a separation system is only 11.9%. Spherical destruction shows a significant relation with the fluidity. To different addition of ground fly ash, the fluidity of cement paste decreases with the increase of spherical destruction. To the strength of cement paste, particle size distribution and spherical destruction are both the key factors. Therefore, spherical destruction is an important measurement index to evaluate the grinding effect of the fly ash mill. MDPI 2021-01-07 /pmc/articles/PMC7826750/ /pubmed/33430518 http://dx.doi.org/10.3390/ma14020283 Text en © 2021 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 Ma, Juntao Wang, Daguang Zhao, Shunbo Duan, Ping Yang, Shangtong Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste |
title | Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste |
title_full | Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste |
title_fullStr | Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste |
title_full_unstemmed | Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste |
title_short | Influence of Particle Morphology of Ground Fly Ash on the Fluidity and Strength of Cement Paste |
title_sort | influence of particle morphology of ground fly ash on the fluidity and strength of cement paste |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7826750/ https://www.ncbi.nlm.nih.gov/pubmed/33430518 http://dx.doi.org/10.3390/ma14020283 |
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