Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag
While the use of ladle steel slag in concrete offers several potential advantages, there are significant research gaps that need to be addressed to promote its safe and effective utilization in the construction industry, e.g. the variations in slag properties, such as chemical composition and physic...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524000275 |
| _version_ | 1797348623027011584 |
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| author | Vojtěch Václavík Adriana Eštoková Radek Papesch Tomáš Dvorský Martina Fabianová Martin Halík Miriama Hološová |
| author_facet | Vojtěch Václavík Adriana Eštoková Radek Papesch Tomáš Dvorský Martina Fabianová Martin Halík Miriama Hološová |
| author_sort | Vojtěch Václavík |
| collection | DOAJ |
| description | While the use of ladle steel slag in concrete offers several potential advantages, there are significant research gaps that need to be addressed to promote its safe and effective utilization in the construction industry, e.g. the variations in slag properties, such as chemical composition and physical characteristics, can influence concrete performance. Moreover, even there is some research on the mechanical properties of concrete containing ladle steel slag, more in-depth studies are needed to assess the long-term durability of such concrete and the research should focus more on evaluating the environmental impact of using ladle steel slag in concrete. The paper reports the fundamental findings of a research study focused on the treatment of ladle slag to be applied as a cement substitute in the manufacturing of cement products. The research aimed to determine the optimal proportion of admixture based on treated ladle slag and evaluate the environmental properties of the resulting cement composites. The treatment process involved mechanical activation, specifically grinding the ladle slag fraction of 0/8 mm using a vibrating mill (Coarse slag) and a ball mill (Fine slag). The treated ladle slag, as an admixture, was examined in conjunction with four types of cement (CEM I, CEM II, CEM III, and CEM V). The research findings revealed that the incorporation of coarse ladle slag enhanced the workability of fresh cement paste across all tested formulations. Moreover, the utilization of treated ladle slag as an admixture in cement paste (substituting cement) exhibited a retarding effect on the setting time. As the age of the test specimens progressed (90 to180 days), the strength properties of the samples with ladle slag admixture approached those of the cement composites prepared using natural aggregates. The climate change impact of cement mortars per strength unit spanned from 0.82 to 2.75 kg CO2eq/MPa for composites incorporating finely-ground slag, and from 0.9 to 3.1 kg CO2eq/MPa for composites utilizing coarse slag. The grinding of ladle slag, even up to 30 wt% cement replacement, did not significantly impact the overall global warming potential and climate change, considering the average mill energy consumption of 50 kWh per 1 t of material. |
| first_indexed | 2024-03-08T12:08:19Z |
| format | Article |
| id | doaj.art-0a564c4fadcb4e2691640c74e4d5d972 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-08T12:08:19Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-0a564c4fadcb4e2691640c74e4d5d9722024-01-23T04:15:40ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e02876Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slagVojtěch Václavík0Adriana Eštoková1Radek Papesch2Tomáš Dvorský3Martina Fabianová4Martin Halík5Miriama Hološová6Department of Environmental Engineering, Faculty of Mining and Geology, VSB – Technical University of Ostrava, 17. listopadu 15/2172, 708 00 Ostrava, Czech Republic; Corresponding author.Institute for Sustainable and Circular Construction, Faculty of Civil Engineering, Technical University of Košice, Vysokoskolska 4, 042 00 Kosice, SlovakiaThe Technical and Test Institute for Construction Prague, soe, Ostrava Branch, U Studia 14, 700 30 Ostrava, Czech RepublicDepartment of Environmental Engineering, Faculty of Mining and Geology, VSB – Technical University of Ostrava, 17. listopadu 15/2172, 708 00 Ostrava, Czech RepublicInstitute for Sustainable and Circular Construction, Faculty of Civil Engineering, Technical University of Košice, Vysokoskolska 4, 042 00 Kosice, SlovakiaDepartment of Environmental Engineering, Faculty of Mining and Geology, VSB – Technical University of Ostrava, 17. listopadu 15/2172, 708 00 Ostrava, Czech RepublicInstitute for Sustainable and Circular Construction, Faculty of Civil Engineering, Technical University of Košice, Vysokoskolska 4, 042 00 Kosice, SlovakiaWhile the use of ladle steel slag in concrete offers several potential advantages, there are significant research gaps that need to be addressed to promote its safe and effective utilization in the construction industry, e.g. the variations in slag properties, such as chemical composition and physical characteristics, can influence concrete performance. Moreover, even there is some research on the mechanical properties of concrete containing ladle steel slag, more in-depth studies are needed to assess the long-term durability of such concrete and the research should focus more on evaluating the environmental impact of using ladle steel slag in concrete. The paper reports the fundamental findings of a research study focused on the treatment of ladle slag to be applied as a cement substitute in the manufacturing of cement products. The research aimed to determine the optimal proportion of admixture based on treated ladle slag and evaluate the environmental properties of the resulting cement composites. The treatment process involved mechanical activation, specifically grinding the ladle slag fraction of 0/8 mm using a vibrating mill (Coarse slag) and a ball mill (Fine slag). The treated ladle slag, as an admixture, was examined in conjunction with four types of cement (CEM I, CEM II, CEM III, and CEM V). The research findings revealed that the incorporation of coarse ladle slag enhanced the workability of fresh cement paste across all tested formulations. Moreover, the utilization of treated ladle slag as an admixture in cement paste (substituting cement) exhibited a retarding effect on the setting time. As the age of the test specimens progressed (90 to180 days), the strength properties of the samples with ladle slag admixture approached those of the cement composites prepared using natural aggregates. The climate change impact of cement mortars per strength unit spanned from 0.82 to 2.75 kg CO2eq/MPa for composites incorporating finely-ground slag, and from 0.9 to 3.1 kg CO2eq/MPa for composites utilizing coarse slag. The grinding of ladle slag, even up to 30 wt% cement replacement, did not significantly impact the overall global warming potential and climate change, considering the average mill energy consumption of 50 kWh per 1 t of material.http://www.sciencedirect.com/science/article/pii/S2214509524000275Furnace slagTreatmentRecyclingAdmixtureCementConsistency of cement paste |
| spellingShingle | Vojtěch Václavík Adriana Eštoková Radek Papesch Tomáš Dvorský Martina Fabianová Martin Halík Miriama Hološová Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag Case Studies in Construction Materials Furnace slag Treatment Recycling Admixture Cement Consistency of cement paste |
| title | Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag |
| title_full | Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag |
| title_fullStr | Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag |
| title_full_unstemmed | Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag |
| title_short | Investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag |
| title_sort | investigation of the engineering and environmental properties of cement mortars incorporating ladle furnace steel slag |
| topic | Furnace slag Treatment Recycling Admixture Cement Consistency of cement paste |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524000275 |
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