Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachability
The production of cement, the predominant construction binder, is associated with high energy consumption, enormous raw material depletion, and a large volume of CO2 emissions, making cement one of the most polluting materials. This study aims to contribute to the sustainability of the construction...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Results in Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123024012003 |
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| author | Ondřej Jankovský Zbyšek Pavlík Martina Záleská Milena Pavlíková Adam Pivák Jana Nábělková Anna-Marie Lauermannová Adéla Jiříčková David Sedmidubský |
| author_facet | Ondřej Jankovský Zbyšek Pavlík Martina Záleská Milena Pavlíková Adam Pivák Jana Nábělková Anna-Marie Lauermannová Adéla Jiříčková David Sedmidubský |
| author_sort | Ondřej Jankovský |
| collection | DOAJ |
| description | The production of cement, the predominant construction binder, is associated with high energy consumption, enormous raw material depletion, and a large volume of CO2 emissions, making cement one of the most polluting materials. This study aims to contribute to the sustainability of the construction industry by significantly reducing the proportion of Portland cement (PC) in the composition of mortars. The binder content reduction was achieved by the addition of large amounts of fly ash admixture (FA) from lignite combustion while studying the effectiveness of the immobilization of heavy metals (HMs), which are present in FA, in the PC/FA matrix. Along with the analysis of the FA admixture amount on the properties of the prepared mortars, emphasis was put on the study of the influence of prolonged curing on the development of the physical parameters of the mortars and the immobilization efficiency of the HMs. It was revealed that FA can be added to PC by up to 20 wt%, enabling the production of construction mortars with high strength and low porosity, while confining hazardous substances such as HMs in the matrix. Prolonged curing at elevated relative humidity led to the continuous evolution and solidification of the mortar structure, improving its engineering properties and HMs immobilization efficiency. |
| format | Article |
| id | doaj-art-e8e557f3eda84dc8987ce51ad5c1e4b5 |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-e8e557f3eda84dc8987ce51ad5c1e4b52024-12-19T10:57:31ZengElsevierResults in Engineering2590-12302024-12-0124102945Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachabilityOndřej Jankovský0Zbyšek Pavlík1Martina Záleská2Milena Pavlíková3Adam Pivák4Jana Nábělková5Anna-Marie Lauermannová6Adéla Jiříčková7David Sedmidubský8Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28, Praha 6, Czech RepublicDepartment of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic; Corresponding author.Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicDepartment of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicDepartment of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech RepublicDepartment of Sanitary and Ecological Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29, Prague, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28, Praha 6, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28, Praha 6, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28, Praha 6, Czech RepublicThe production of cement, the predominant construction binder, is associated with high energy consumption, enormous raw material depletion, and a large volume of CO2 emissions, making cement one of the most polluting materials. This study aims to contribute to the sustainability of the construction industry by significantly reducing the proportion of Portland cement (PC) in the composition of mortars. The binder content reduction was achieved by the addition of large amounts of fly ash admixture (FA) from lignite combustion while studying the effectiveness of the immobilization of heavy metals (HMs), which are present in FA, in the PC/FA matrix. Along with the analysis of the FA admixture amount on the properties of the prepared mortars, emphasis was put on the study of the influence of prolonged curing on the development of the physical parameters of the mortars and the immobilization efficiency of the HMs. It was revealed that FA can be added to PC by up to 20 wt%, enabling the production of construction mortars with high strength and low porosity, while confining hazardous substances such as HMs in the matrix. Prolonged curing at elevated relative humidity led to the continuous evolution and solidification of the mortar structure, improving its engineering properties and HMs immobilization efficiency.http://www.sciencedirect.com/science/article/pii/S2590123024012003 |
| spellingShingle | Ondřej Jankovský Zbyšek Pavlík Martina Záleská Milena Pavlíková Adam Pivák Jana Nábělková Anna-Marie Lauermannová Adéla Jiříčková David Sedmidubský Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachability Results in Engineering |
| title | Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachability |
| title_full | Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachability |
| title_fullStr | Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachability |
| title_full_unstemmed | Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachability |
| title_short | Fly ash admixture originating from lignite combustion in construction mortars – Time evolution of technical parameters and heavy metals leachability |
| title_sort | fly ash admixture originating from lignite combustion in construction mortars time evolution of technical parameters and heavy metals leachability |
| url | http://www.sciencedirect.com/science/article/pii/S2590123024012003 |
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