Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues
The use of secondary mining resources to replace conventional constituents in mortars production has proved the effectiveness to preserve the quality of mechanical, physical, and chemical properties. However, minimal research has been performed to quantify the environmental impacts of mortars with m...
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| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/17/7947 |
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| author | Joana Almeida Paulina Faria Alexandra Branco Ribeiro António Santos Silva |
| author_facet | Joana Almeida Paulina Faria Alexandra Branco Ribeiro António Santos Silva |
| author_sort | Joana Almeida |
| collection | DOAJ |
| description | The use of secondary mining resources to replace conventional constituents in mortars production has proved the effectiveness to preserve the quality of mechanical, physical, and chemical properties. However, minimal research has been performed to quantify the environmental impacts of mortars with mining residues. In the present work, a life cycle assessment of 10 mortars was carried out. A reference mortar (100% of cement binder) and mortars with cement substitutions in 10%, 25%, and 50% by raw, electrodialytic treated, and electrodialytic plus thermal treated mining residues were analysed. The impacts were studied in six environmental categories: (1) abiotic depletion; (2) global warming; (3) ozone depletion; (4) photochemical ozone creation; (5) acidification; and (6) eutrophication potentials. The results demonstrated that mortars formulated with raw mining residues may decrease the environmental impacts, namely in global warming potential (55.1 kg CO<sub>2</sub> eq./t modified mortar). Considering the treatments applied to mining residues, the major mitigations were reported in photochemical ozone creation (−99%), ozone depletion (−76 to −98%), and acidification potential (−90 to −94%), mainly due to the disposal impacts avoided in comparison to the reference mortar. Analysing all mortars’ constituents and their management options, products with electrodialytic treated mining residues showed higher influence in ozone depletion (18 to 52%). Coupling a thermal procedure, mining residues contributed for 99% of the abiotic depletion potential of mortars. |
| first_indexed | 2024-03-10T08:16:25Z |
| format | Article |
| id | doaj.art-5ebb702b8e0d4d8180b920e010cf67b4 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T08:16:25Z |
| publishDate | 2021-08-01 |
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| series | Applied Sciences |
| spelling | doaj.art-5ebb702b8e0d4d8180b920e010cf67b42023-11-22T10:19:00ZengMDPI AGApplied Sciences2076-34172021-08-011117794710.3390/app11177947Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining ResiduesJoana Almeida0Paulina Faria1Alexandra Branco Ribeiro2António Santos Silva3Department of Civil Engineering, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, PortugalDepartment of Civil Engineering, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, PortugalCENSE–Center for Environmental and Sustainability Research, Department of Environmental Sciences and Engineering, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, PortugalDepartment of Materials, National Laboratory for Civil Engineering, 1700-066 Lisbon, PortugalThe use of secondary mining resources to replace conventional constituents in mortars production has proved the effectiveness to preserve the quality of mechanical, physical, and chemical properties. However, minimal research has been performed to quantify the environmental impacts of mortars with mining residues. In the present work, a life cycle assessment of 10 mortars was carried out. A reference mortar (100% of cement binder) and mortars with cement substitutions in 10%, 25%, and 50% by raw, electrodialytic treated, and electrodialytic plus thermal treated mining residues were analysed. The impacts were studied in six environmental categories: (1) abiotic depletion; (2) global warming; (3) ozone depletion; (4) photochemical ozone creation; (5) acidification; and (6) eutrophication potentials. The results demonstrated that mortars formulated with raw mining residues may decrease the environmental impacts, namely in global warming potential (55.1 kg CO<sub>2</sub> eq./t modified mortar). Considering the treatments applied to mining residues, the major mitigations were reported in photochemical ozone creation (−99%), ozone depletion (−76 to −98%), and acidification potential (−90 to −94%), mainly due to the disposal impacts avoided in comparison to the reference mortar. Analysing all mortars’ constituents and their management options, products with electrodialytic treated mining residues showed higher influence in ozone depletion (18 to 52%). Coupling a thermal procedure, mining residues contributed for 99% of the abiotic depletion potential of mortars.https://www.mdpi.com/2076-3417/11/17/7947life cycle assessmentenvironmental impactmortarsecondary mining resourceselectrodialytic technologythermal treatment |
| spellingShingle | Joana Almeida Paulina Faria Alexandra Branco Ribeiro António Santos Silva Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues Applied Sciences life cycle assessment environmental impact mortar secondary mining resources electrodialytic technology thermal treatment |
| title | Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues |
| title_full | Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues |
| title_fullStr | Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues |
| title_full_unstemmed | Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues |
| title_short | Life Cycle Assessment of Mortars Produced Partially Replacing Cement by Treated Mining Residues |
| title_sort | life cycle assessment of mortars produced partially replacing cement by treated mining residues |
| topic | life cycle assessment environmental impact mortar secondary mining resources electrodialytic technology thermal treatment |
| url | https://www.mdpi.com/2076-3417/11/17/7947 |
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