Evaluation of mine tailings' potential as supplementary cementitious materials based on chemical, mineralogical and physical characteristics
| Autor: | Anne Simonsen, Soili Solismaa, Pernille Erland Jensen, Henrik K. Hansen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Cement
Construction Materials 020209 energy fungi Metallurgy Environmental pollution 02 engineering and technology 010501 environmental sciences Silicon Dioxide 01 natural sciences Tailings Grain size 13. Climate action Specific surface area 8. Economic growth 0202 electrical engineering electronic engineering information engineering Environmental science Cementitious Loss on ignition Environmental Pollution Waste Management and Disposal Chemical composition 0105 earth and related environmental sciences |
| Zdroj: | Waste management (New York, N.Y.). 102 |
| ISSN: | 1879-2456 |
| Popis: | In order to reduce emissions of CO2 from cement production and avoid severe environmental pollution from the deposition of mine waste, this study investigated the possibility of utilizing mine tailings as supplementary cementitious materials (SCM) for partially replacement of cement in concrete. This study provides a characterization study of mine tailings to evaluate their potential for contributing chemically or physically as SCM. 13 mine tailing samples were characterized in regards to chemical composition (XRF, Loss on Ignition, CaCO3 and pH), mineralogical content (XRD) and physical characteristics (Grain size distribution, Specific Surface Area, SEM-analysis). The characterization study showed five mine tailings to possess potential chemical contribution as SCM based on their chemical composition (SiO2, Al2O3, Fe2O3 and CaO) and amorphous content. Three mine tailings showed potential physical contribution as SCM based on grain size and grain morphology. The remainder mine tailing characteristics suggest that their potential as SCM may be improved by pretreatment such as milling and/or thermal treatment. |
| Databáze: | OpenAIRE |
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