Effect of mineral additions on the microstructure and properties of blended cement matrices for fibre-cement applications
This detailed study of the effect of three mineral additions (limestone, rice husk ash and activated coal miningwaste) differing in composition and properties explored the behaviour of blended cements with a 25% re-placement ratio. The aim was to select the optimal addition for improving the perform...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/185242 |
| Acceso en línea: | http://hdl.handle.net/10261/185242 |
| Access Level: | acceso abierto |
| Palabra clave: | Activated coal mining waste Blended cement |
| Sumario: | This detailed study of the effect of three mineral additions (limestone, rice husk ash and activated coal miningwaste) differing in composition and properties explored the behaviour of blended cements with a 25% re-placement ratio. The aim was to select the optimal addition for improving the performance of naturalfibre-reinforced cements. The pozzolanic, physical and mechanical properties as well as the pore structure of theblended cement matrices were examined. Thefindings showed that although rice husk ash is characterised byhigh pozzolanicity, it had a less favourable effect on the cement than expected, yielding porous, poorly com-pacted and hence weak matrices. The activated coal mining waste showed better performance, reaching similarstrength to control mortar, better pore size refinement and an important reduction in mean pore size of 60%compared to control mortar after 60 days of curing. In light of thosefindings, this aluminosilicate addition isproposed as the most apt of the three studied for improving the quality offibre-reinforced cements, keeping inmind that the interaction effect amongst the three mineral additions was not considered in the present work |
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