Mineralogical study of granite waste in a pozzolan/Ca(OH)2 system: Influence of the activation process
[EN] Despite the technological improvements introduced in the production of ornamental granite, sludge is inevitably generated in end product cutting and polishing. The present study constitutes the first attempt to scientifically analyse granite sludge, focusing in particular on its characterisatio...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universidad de León |
| Repositorio: | BULERIA. Repositorio Institucional de la Universidad de León |
| OAI Identifier: | oai:buleria.unileon.es:10612/23850 |
| Acceso en línea: | https://hdl.handle.net/10612/23850 |
| Access Level: | acceso abierto |
| Palabra clave: | Construcción Tecnología de materiales Waste management Pozzolan Mineralogy Hydration products 3312 Tecnología de Materiales 3313.04 Material de Construcción |
| Sumario: | [EN] Despite the technological improvements introduced in the production of ornamental granite, sludge is inevitably generated in end product cutting and polishing. The present study constitutes the first attempt to scientifically analyse granite sludge, focusing in particular on its characterisation and pozzolanic activity and the morphological and microstructural changes taking place in both thermally activated waste and in the pozzolan/Ca(OH)2 system in the first 360 days of reaction. The possible valorisation of this waste as a component of more eco-friendly cements is assessed with a view to furthering the circular economy. The findings show that thermal activation has no beneficial effect on sludge pozzolanicity, which at later ages was similar to the activity observed in other additions such as copper and manganese silicate slag but lower than in silica fume, fly ash and fired clay materials. The granite waste/Ca(OH)2 system microstructure, in turn, contains C-S-H gels characterised by a low (0.6–1.0) Ca/Si ratio. |
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