DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH
The properties of fly ashes vary because of the differences in the properties of their individual particles, and the determination of variation in these properties is of interest to the industries which use pulverized raw fly ash in applications, such as in cementitious materials and in the recovery...
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| Format: | Article |
| Language: | English |
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CTU Central Library
2016-08-01
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| Series: | Acta Polytechnica |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/ap/article/view/3447 |
| _version_ | 1818245845023195136 |
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| author | Usman Haider Zdenek Bittnar Lubomír Kopecky Vít Šmilauer Jaroslav Pokorny Martina Zaleska Zdenek Prošek Vladimír Hrbek |
| author_facet | Usman Haider Zdenek Bittnar Lubomír Kopecky Vít Šmilauer Jaroslav Pokorny Martina Zaleska Zdenek Prošek Vladimír Hrbek |
| author_sort | Usman Haider |
| collection | DOAJ |
| description | The properties of fly ashes vary because of the differences in the properties of their individual particles, and the determination of variation in these properties is of interest to the industries which use pulverized raw fly ash in applications, such as in cementitious materials and in the recovery of certain rare elements from raw fly ash. To investigate the differences in individual particles, four pulverized raw fly ashes from thermal power plants of the Czech Republic were used in this research. It was observed from FE-SEM that all four fly ashes consist of glassy hollow spherical, solid spherical, porous spherical, bright spherical, porous slaggy and compact slaggy particles. Box and whisker diagrams were plotted from the data of EDX individual particle analyses, which showed that the data of percentages for the Si, Al, and Fe elements is more scattered as compared to other elements. It was further observed from ternary phase diagrams and pseudo coloured images, that nature of fly ash particles changes from alumino silicate glassy to alumino silicate calcite metallic to pure ferro-metallic,where glassy particles showed high percentages and pure calcite particles were absent in fly ashes. Furthermore, a comparison between the XRF, the EDX total area analyses, showed that the EDX individual particle analysis gives more realistic and reliable data with median, mean, and the standard deviation for percentages of each element present in the fly ashes. |
| first_indexed | 2024-12-12T14:39:23Z |
| format | Article |
| id | doaj.art-20a149ca96354ec3811eb95aa02a5b56 |
| institution | Directory Open Access Journal |
| issn | 1210-2709 1805-2363 |
| language | English |
| last_indexed | 2024-12-12T14:39:23Z |
| publishDate | 2016-08-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica |
| spelling | doaj.art-20a149ca96354ec3811eb95aa02a5b562022-12-22T00:21:18ZengCTU Central LibraryActa Polytechnica1210-27091805-23632016-08-0156426528210.14311/AP.2016.56.02653330DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASHUsman Haider0Zdenek Bittnar1Lubomír Kopecky2Vít Šmilauer3Jaroslav Pokorny4Martina Zaleska5Zdenek Prošek6Vladimír Hrbek7Czech Technical University in PragueDepartment of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Czech RepublicDepartment of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Czech RepublicDepartment of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Czech RepublicDepartment of Material Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Czech RepublicDepartment of Material Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Czech RepublicDepartment of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Czech RepublicDepartment of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Czech RepublicThe properties of fly ashes vary because of the differences in the properties of their individual particles, and the determination of variation in these properties is of interest to the industries which use pulverized raw fly ash in applications, such as in cementitious materials and in the recovery of certain rare elements from raw fly ash. To investigate the differences in individual particles, four pulverized raw fly ashes from thermal power plants of the Czech Republic were used in this research. It was observed from FE-SEM that all four fly ashes consist of glassy hollow spherical, solid spherical, porous spherical, bright spherical, porous slaggy and compact slaggy particles. Box and whisker diagrams were plotted from the data of EDX individual particle analyses, which showed that the data of percentages for the Si, Al, and Fe elements is more scattered as compared to other elements. It was further observed from ternary phase diagrams and pseudo coloured images, that nature of fly ash particles changes from alumino silicate glassy to alumino silicate calcite metallic to pure ferro-metallic,where glassy particles showed high percentages and pure calcite particles were absent in fly ashes. Furthermore, a comparison between the XRF, the EDX total area analyses, showed that the EDX individual particle analysis gives more realistic and reliable data with median, mean, and the standard deviation for percentages of each element present in the fly ashes.https://ojs.cvut.cz/ojs/index.php/ap/article/view/3447fly ash, physical, morphological, FE-SEM, EDX, chemical properties, magnetospheres |
| spellingShingle | Usman Haider Zdenek Bittnar Lubomír Kopecky Vít Šmilauer Jaroslav Pokorny Martina Zaleska Zdenek Prošek Vladimír Hrbek DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH Acta Polytechnica fly ash, physical, morphological, FE-SEM, EDX, chemical properties, magnetospheres |
| title | DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH |
| title_full | DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH |
| title_fullStr | DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH |
| title_full_unstemmed | DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH |
| title_short | DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH |
| title_sort | determining the role of individual fly ash particles in influencing the variation in the overall physical morphological and chemical properties of fly ash |
| topic | fly ash, physical, morphological, FE-SEM, EDX, chemical properties, magnetospheres |
| url | https://ojs.cvut.cz/ojs/index.php/ap/article/view/3447 |
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